Wrap all errors with tracerr

api/api.go

@@ -9,6 +9,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 	"github.com/hermeznetwork/hermez-node/db/l2db"
 	"github.com/hermeznetwork/hermez-node/db/statedb"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // TODO: Add correct values to constants
@@ -49,10 +50,10 @@ func NewAPI(
 	// Check input
 	// TODO: is stateDB only needed for explorer endpoints or for both?
 	if coordinatorEndpoints && l2db == nil {
-		return nil, errors.New("cannot serve Coordinator endpoints without L2DB")
+		return nil, tracerr.Wrap(errors.New("cannot serve Coordinator endpoints without L2DB"))
 	}
 	if explorerEndpoints && hdb == nil {
-		return nil, errors.New("cannot serve Explorer endpoints without HistoryDB")
+		return nil, tracerr.Wrap(errors.New("cannot serve Explorer endpoints without HistoryDB"))
 	}
 
 	a := &API{

api/api_test.go

@@ -25,6 +25,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/log"
 	"github.com/hermeznetwork/hermez-node/test"
 	"github.com/hermeznetwork/hermez-node/test/til"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // Pendinger is an interface that allows getting last returned item ID and PendingItems to be used for building fromItem
@@ -243,8 +244,7 @@ func TestMain(m *testing.M) {
 	// Start server
 	server := &http.Server{Addr: apiPort, Handler: apiGin}
 	go func() {
-		if err := server.ListenAndServe(); err != nil &&
+		if err := server.ListenAndServe(); err != nil && tracerr.Unwrap(err) != http.ErrServerClosed {
-			err != http.ErrServerClosed {
 			panic(err)
 		}
 	}()
@@ -471,7 +471,7 @@ func doGoodReqPaginated(
 			"GET", iterPath+"&order="+order, nil,
 			iterStruct,
 		); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		appendIter(iterStruct)
 		// Keep iterating?
@@ -505,14 +505,14 @@ func doGoodReq(method, path string, reqBody io.Reader, returnStruct interface{})
 	client := &http.Client{}
 	httpReq, err := http.NewRequest(method, path, reqBody)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if reqBody != nil {
 		httpReq.Header.Add("Content-Type", "application/json")
 	}
 	route, pathParams, err := tc.router.FindRoute(httpReq.Method, httpReq.URL)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// Validate request against swagger spec
 	requestValidationInput := &swagger.RequestValidationInput{
@@ -521,24 +521,24 @@ func doGoodReq(method, path string, reqBody io.Reader, returnStruct interface{})
 		Route:      route,
 	}
 	if err := swagger.ValidateRequest(ctx, requestValidationInput); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// Do API call
 	resp, err := client.Do(httpReq)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if resp.Body == nil && returnStruct != nil {
-		return errors.New("Nil body")
+		return tracerr.Wrap(errors.New("Nil body"))
 	}
 	//nolint
 	defer resp.Body.Close()
 	body, err := ioutil.ReadAll(resp.Body)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if resp.StatusCode != 200 {
-		return fmt.Errorf("%d response. Body: %s", resp.StatusCode, string(body))
+		return tracerr.Wrap(fmt.Errorf("%d response. Body: %s", resp.StatusCode, string(body)))
 	}
 	if returnStruct == nil {
 		return nil
@@ -547,7 +547,7 @@ func doGoodReq(method, path string, reqBody io.Reader, returnStruct interface{})
 	if err := json.Unmarshal(body, returnStruct); err != nil {
 		log.Error("invalid json: " + string(body))
 		log.Error(err)
-		return err
+		return tracerr.Wrap(err)
 	}
 	// log.Info(string(body))
 	// Validate response against swagger spec
@@ -566,7 +566,7 @@ func doBadReq(method, path string, reqBody io.Reader, expectedResponseCode int)
 	httpReq, _ := http.NewRequest(method, path, reqBody)
 	route, pathParams, err := tc.router.FindRoute(httpReq.Method, httpReq.URL)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// Validate request against swagger spec
 	requestValidationInput := &swagger.RequestValidationInput{
@@ -576,26 +576,26 @@ func doBadReq(method, path string, reqBody io.Reader, expectedResponseCode int)
 	}
 	if err := swagger.ValidateRequest(ctx, requestValidationInput); err != nil {
 		if expectedResponseCode != 400 {
-			return err
+			return tracerr.Wrap(err)
 		}
 		log.Warn("The request does not match the API spec")
 	}
 	// Do API call
 	resp, err := client.Do(httpReq)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if resp.Body == nil {
-		return errors.New("Nil body")
+		return tracerr.Wrap(errors.New("Nil body"))
 	}
 	//nolint
 	defer resp.Body.Close()
 	body, err := ioutil.ReadAll(resp.Body)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if resp.StatusCode != expectedResponseCode {
-		return fmt.Errorf("Unexpected response code: %d. Body: %s", resp.StatusCode, string(body))
+		return tracerr.Wrap(fmt.Errorf("Unexpected response code: %d. Body: %s", resp.StatusCode, string(body)))
 	}
 	// Validate response against swagger spec
 	responseValidationInput := &swagger.ResponseValidationInput{

api/batch.go

@@ -8,6 +8,7 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db/historydb"
+	"github.com/hermeznetwork/tracerr"
 )
 
 func (a *API) getBatches(c *gin.Context) {
@@ -110,7 +111,7 @@ func (a *API) getFullBatch(c *gin.Context) {
 	txs, _, err := a.h.GetHistoryTxs(
 		nil, nil, nil, nil, batchNum, nil, nil, &maxTxsPerBatch, historydb.OrderAsc,
 	)
-	if err != nil && err != sql.ErrNoRows {
+	if err != nil && tracerr.Unwrap(err) != sql.ErrNoRows {
 		retSQLErr(err, c)
 		return
 	}

api/handlers.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/hermeznetwork/hermez-node/db/historydb"
+	"github.com/hermeznetwork/tracerr"
 )
 
 const (
@@ -32,7 +33,7 @@ var (
 )
 
 func retSQLErr(err error, c *gin.Context) {
-	if err == sql.ErrNoRows {
+	if tracerr.Unwrap(err) == sql.ErrNoRows {
 		c.JSON(http.StatusNotFound, errorMsg{
 			Message: err.Error(),
 		})

api/parsers.go

@@ -10,6 +10,7 @@ import (
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db/historydb"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
@@ -25,16 +26,16 @@ func parsePagination(c querier) (fromItem *uint, order string, limit *uint, err
 	// FromItem
 	fromItem, err = parseQueryUint("fromItem", nil, 0, maxUint32, c)
 	if err != nil {
-		return nil, "", nil, err
+		return nil, "", nil, tracerr.Wrap(err)
 	}
 	// Order
 	order = dfltOrder
 	const orderName = "order"
 	orderStr := c.Query(orderName)
 	if orderStr != "" && !(orderStr == historydb.OrderAsc || historydb.OrderDesc == orderStr) {
-		return nil, "", nil, errors.New(
+		return nil, "", nil, tracerr.Wrap(errors.New(
 			"order must have the value " + historydb.OrderAsc + " or " + historydb.OrderDesc,
-		)
+		))
 	}
 	if orderStr == historydb.OrderAsc {
 		order = historydb.OrderAsc
@@ -46,7 +47,7 @@ func parsePagination(c querier) (fromItem *uint, order string, limit *uint, err
 	*limit = dfltLimit
 	limit, err = parseQueryUint("limit", limit, 1, maxLimit, c)
 	if err != nil {
-		return nil, "", nil, err
+		return nil, "", nil, tracerr.Wrap(err)
 	}
 	return fromItem, order, limit, nil
 }
@@ -79,7 +80,7 @@ func parseQueryBool(name string, dflt *bool, c querier) (*bool, error) { //nolin
 		*res = false
 		return res, nil
 	}
-	return nil, fmt.Errorf("Invalid %s. Must be eithe true or false", name)
+	return nil, tracerr.Wrap(fmt.Errorf("Invalid %s. Must be eithe true or false", name))
 }
 
 func parseQueryHezEthAddr(c querier) (*ethCommon.Address, error) {
@@ -135,10 +136,10 @@ func parseQueryTxType(c querier) (*common.TxType, error) {
 		ret := common.TxTypeTransferToBJJ
 		return &ret, nil
 	}
-	return nil, fmt.Errorf(
+	return nil, tracerr.Wrap(fmt.Errorf(
 		"invalid %s, %s is not a valid option. Check the valid options in the docmentation",
 		name, typeStr,
-	)
+	))
 }
 
 func parseIdx(c querier) (*common.Idx, error) {
@@ -151,7 +152,7 @@ func parseExitFilters(c querier) (*common.TokenID, *ethCommon.Address, *babyjub.
 	// TokenID
 	tid, err := parseQueryUint("tokenId", nil, 0, maxUint32, c)
 	if err != nil {
-		return nil, nil, nil, nil, err
+		return nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 	var tokenID *common.TokenID
 	if tid != nil {
@@ -161,25 +162,23 @@ func parseExitFilters(c querier) (*common.TokenID, *ethCommon.Address, *babyjub.
 	// Hez Eth addr
 	addr, err := parseQueryHezEthAddr(c)
 	if err != nil {
-		return nil, nil, nil, nil, err
+		return nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 	// BJJ
 	bjj, err := parseQueryBJJ(c)
 	if err != nil {
-		return nil, nil, nil, nil, err
+		return nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 	if addr != nil && bjj != nil {
-		return nil, nil, nil, nil,
+		return nil, nil, nil, nil, tracerr.Wrap(errors.New("bjj and hermezEthereumAddress params are incompatible"))
-			errors.New("bjj and hermezEthereumAddress params are incompatible")
 	}
 	// Idx
 	idx, err := parseIdx(c)
 	if err != nil {
-		return nil, nil, nil, nil, err
+		return nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 	if idx != nil && (addr != nil || bjj != nil || tokenID != nil) {
-		return nil, nil, nil, nil,
+		return nil, nil, nil, nil, tracerr.Wrap(errors.New("accountIndex is incompatible with BJJ, hermezEthereumAddress and tokenId"))
-			errors.New("accountIndex is incompatible with BJJ, hermezEthereumAddress and tokenId")
 	}
 	return tokenID, addr, bjj, idx, nil
 }
@@ -195,7 +194,7 @@ func parseTokenFilters(c querier) ([]common.TokenID, []string, string, error) {
 		for _, id := range ids {
 			idUint, err := strconv.Atoi(id)
 			if err != nil {
-				return nil, nil, "", err
+				return nil, nil, "", tracerr.Wrap(err)
 			}
 			tokenID := common.TokenID(idUint)
 			tokensIDs = append(tokensIDs, tokenID)
@@ -211,11 +210,11 @@ func parseTokenFilters(c querier) ([]common.TokenID, []string, string, error) {
 func parseBidFilters(c querier) (*int64, *ethCommon.Address, error) {
 	slotNum, err := parseQueryInt64("slotNum", nil, 0, maxInt64, c)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	bidderAddr, err := parseQueryEthAddr("bidderAddr", c)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	return slotNum, bidderAddr, nil
 }
@@ -223,19 +222,19 @@ func parseBidFilters(c querier) (*int64, *ethCommon.Address, error) {
 func parseSlotFilters(c querier) (*int64, *int64, *ethCommon.Address, *bool, error) {
 	minSlotNum, err := parseQueryInt64("minSlotNum", nil, 0, maxInt64, c)
 	if err != nil {
-		return nil, nil, nil, nil, err
+		return nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 	maxSlotNum, err := parseQueryInt64("maxSlotNum", nil, 0, maxInt64, c)
 	if err != nil {
-		return nil, nil, nil, nil, err
+		return nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 	wonByEthereumAddress, err := parseQueryEthAddr("wonByEthereumAddress", c)
 	if err != nil {
-		return nil, nil, nil, nil, err
+		return nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 	finishedAuction, err := parseQueryBool("finishedAuction", nil, c)
 	if err != nil {
-		return nil, nil, nil, nil, err
+		return nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 	return minSlotNum, maxSlotNum, wonByEthereumAddress, finishedAuction, nil
 }
@@ -250,7 +249,7 @@ func parseAccountFilters(c querier) ([]common.TokenID, *ethCommon.Address, *baby
 		for _, id := range ids {
 			idUint, err := strconv.Atoi(id)
 			if err != nil {
-				return nil, nil, nil, err
+				return nil, nil, nil, tracerr.Wrap(err)
 			}
 			tokenID := common.TokenID(idUint)
 			tokenIDs = append(tokenIDs, tokenID)
@@ -259,16 +258,15 @@ func parseAccountFilters(c querier) ([]common.TokenID, *ethCommon.Address, *baby
 	// Hez Eth addr
 	addr, err := parseQueryHezEthAddr(c)
 	if err != nil {
-		return nil, nil, nil, err
+		return nil, nil, nil, tracerr.Wrap(err)
 	}
 	// BJJ
 	bjj, err := parseQueryBJJ(c)
 	if err != nil {
-		return nil, nil, nil, err
+		return nil, nil, nil, tracerr.Wrap(err)
 	}
 	if addr != nil && bjj != nil {
-		return nil, nil, nil,
+		return nil, nil, nil, tracerr.Wrap(errors.New("bjj and hermezEthereumAddress params are incompatible"))
-			errors.New("bjj and hermezEthereumAddress params are incompatible")
 	}
 
 	return tokenIDs, addr, bjj, nil
@@ -284,11 +282,11 @@ func parseParamTxID(c paramer) (common.TxID, error) {
 	const name = "id"
 	txIDStr := c.Param(name)
 	if txIDStr == "" {
-		return common.TxID{}, fmt.Errorf("%s is required", name)
+		return common.TxID{}, tracerr.Wrap(fmt.Errorf("%s is required", name))
 	}
 	txID, err := common.NewTxIDFromString(txIDStr)
 	if err != nil {
-		return common.TxID{}, fmt.Errorf("invalid %s", name)
+		return common.TxID{}, tracerr.Wrap(fmt.Errorf("invalid %s", name))
 	}
 	return txID, nil
 }
@@ -318,22 +316,22 @@ func stringToIdx(idxStr, name string) (*common.Idx, error) {
 	splitted := strings.Split(idxStr, ":")
 	const expectedLen = 3
 	if len(splitted) != expectedLen || splitted[0] != "hez" {
-		return nil, fmt.Errorf(
+		return nil, tracerr.Wrap(fmt.Errorf(
-			"invalid %s, must follow this: hez:<tokenSymbol>:index", name)
+			"invalid %s, must follow this: hez:<tokenSymbol>:index", name))
 	}
 	// TODO: check that the tokenSymbol match the token related to the account index
 	idxInt, err := strconv.Atoi(splitted[2])
 	idx := common.Idx(idxInt)
-	return &idx, err
+	return &idx, tracerr.Wrap(err)
 }
 
 func stringToUint(uintStr, name string, dflt *uint, min, max uint) (*uint, error) {
 	if uintStr != "" {
 		resInt, err := strconv.Atoi(uintStr)
 		if err != nil || resInt < 0 || resInt < int(min) || resInt > int(max) {
-			return nil, fmt.Errorf(
+			return nil, tracerr.Wrap(fmt.Errorf(
 				"Invalid %s. Must be an integer within the range [%d, %d]",
-				name, min, max)
+				name, min, max))
 		}
 		res := uint(resInt)
 		return &res, nil
@@ -345,9 +343,9 @@ func stringToInt64(uintStr, name string, dflt *int64, min, max int64) (*int64, e
 	if uintStr != "" {
 		resInt, err := strconv.Atoi(uintStr)
 		if err != nil || resInt < 0 || resInt < int(min) || resInt > int(max) {
-			return nil, fmt.Errorf(
+			return nil, tracerr.Wrap(fmt.Errorf(
 				"Invalid %s. Must be an integer within the range [%d, %d]",
-				name, min, max)
+				name, min, max))
 		}
 		res := int64(resInt)
 		return &res, nil
@@ -361,32 +359,32 @@ func hezStringToEthAddr(addrStr, name string) (*ethCommon.Address, error) {
 	}
 	splitted := strings.Split(addrStr, "hez:")
 	if len(splitted) != 2 || len(splitted[1]) != 42 {
-		return nil, fmt.Errorf(
+		return nil, tracerr.Wrap(fmt.Errorf(
-			"Invalid %s, must follow this regex: ^hez:0x[a-fA-F0-9]{40}$", name)
+			"Invalid %s, must follow this regex: ^hez:0x[a-fA-F0-9]{40}$", name))
 	}
 	var addr ethCommon.Address
 	err := addr.UnmarshalText([]byte(splitted[1]))
-	return &addr, err
+	return &addr, tracerr.Wrap(err)
 }
 
 func hezStringToBJJ(bjjStr, name string) (*babyjub.PublicKey, error) {
 	const decodedLen = 33
 	splitted := strings.Split(bjjStr, "hez:")
 	if len(splitted) != 2 || len(splitted[1]) != 44 {
-		return nil, fmt.Errorf(
+		return nil, tracerr.Wrap(fmt.Errorf(
 			"Invalid %s, must follow this regex: ^hez:[A-Za-z0-9+/=]{44}$",
-			name)
+			name))
 	}
 	decoded, err := base64.RawURLEncoding.DecodeString(splitted[1])
 	if err != nil {
-		return nil, fmt.Errorf(
+		return nil, tracerr.Wrap(fmt.Errorf(
 			"Invalid %s, error decoding base64 string: %s",
-			name, err.Error())
+			name, err.Error()))
 	}
 	if len(decoded) != decodedLen {
-		return nil, fmt.Errorf(
+		return nil, tracerr.Wrap(fmt.Errorf(
 			"invalid %s, error decoding base64 string: unexpected byte array length",
-			name)
+			name))
 	}
 	bjjBytes := [decodedLen - 1]byte{}
 	copy(bjjBytes[:decodedLen-1], decoded[:decodedLen-1])
@@ -395,15 +393,15 @@ func hezStringToBJJ(bjjStr, name string) (*babyjub.PublicKey, error) {
 		sum += bjjBytes[i]
 	}
 	if decoded[decodedLen-1] != sum {
-		return nil, fmt.Errorf("invalid %s, checksum failed",
+		return nil, tracerr.Wrap(fmt.Errorf("invalid %s, checksum failed",
-			name)
+			name))
 	}
 	bjjComp := babyjub.PublicKeyComp(bjjBytes)
 	bjj, err := bjjComp.Decompress()
 	if err != nil {
-		return nil, fmt.Errorf(
+		return nil, tracerr.Wrap(fmt.Errorf(
 			"invalid %s, error decompressing public key: %s",
-			name, err.Error())
+			name, err.Error()))
 	}
 	return bjj, nil
 }
@@ -427,7 +425,7 @@ func parseParamEthAddr(name string, c paramer) (*ethCommon.Address, error) {
 func parseEthAddr(ethAddrStr string) (*ethCommon.Address, error) {
 	var addr ethCommon.Address
 	err := addr.UnmarshalText([]byte(ethAddrStr))
-	return &addr, err
+	return &addr, tracerr.Wrap(err)
 }
 
 func parseParamHezEthAddr(c paramer) (*ethCommon.Address, error) {

api/slots.go

@@ -8,6 +8,7 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db/historydb"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // SlotAPI is a repesentation of a slot information
@@ -109,13 +110,13 @@ func (a *API) getSlot(c *gin.Context) {
 
 	slotNum := int64(*slotNumUint)
 	bid, err := a.h.GetBestBidAPI(&slotNum)
-	if err != nil && err != sql.ErrNoRows {
+	if err != nil && tracerr.Unwrap(err) != sql.ErrNoRows {
 		retSQLErr(err, c)
 		return
 	}
 
 	var slot SlotAPI
-	if err == sql.ErrNoRows {
+	if tracerr.Unwrap(err) == sql.ErrNoRows {
 		slot = a.newSlotAPI(slotNum, currentBlock.Num, nil, auctionVars)
 	} else {
 		slot = a.newSlotAPI(bid.SlotNum, currentBlock.Num, &bid, auctionVars)
@@ -252,14 +253,14 @@ func (a *API) getSlots(c *gin.Context) {
 		slotMinLim, slotMaxLim, pendingItems = getLimits(*minSlotNum, *maxSlotNum, fromItem, limit, order)
 		// Get best bids in range maxSlotNum - minSlotNum
 		bids, _, err = a.h.GetBestBidsAPI(&slotMinLim, &slotMaxLim, wonByEthereumAddress, nil, order)
-		if err != nil && err != sql.ErrNoRows {
+		if err != nil && tracerr.Unwrap(err) != sql.ErrNoRows {
 			retSQLErr(err, c)
 			return
 		}
 	} else {
 		slotMinLim, slotMaxLim = getLimitsWithAddr(minSlotNum, maxSlotNum, fromItem, limit, order)
 		bids, pendingItems, err = a.h.GetBestBidsAPI(&slotMinLim, &slotMaxLim, wonByEthereumAddress, limit, order)
-		if err != nil && err != sql.ErrNoRows {
+		if err != nil && tracerr.Unwrap(err) != sql.ErrNoRows {
 			retSQLErr(err, c)
 			return
 		}

api/state.go

@@ -8,6 +8,7 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db/historydb"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // Network define status of the network
@@ -89,12 +90,12 @@ func (a *API) UpdateNetworkInfo(
 ) error {
 	lastBatch, err := a.h.GetBatchAPI(lastBatchNum)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	lastClosedSlot := currentSlot + int64(a.status.Auction.ClosedAuctionSlots)
 	nextForgers, err := a.getNextForgers(lastSyncBlock, currentSlot, lastClosedSlot)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	a.status.Lock()
 	a.status.Network.LastSyncBlock = lastSyncBlock.Num
@@ -113,7 +114,7 @@ func (a *API) getNextForgers(lastBlock common.Block, currentSlot, lastClosedSlot
 	limit := uint(lastClosedSlot - currentSlot + 1)
 	bids, _, err := a.h.GetBestBidsAPI(&currentSlot, &lastClosedSlot, nil, &limit, "ASC")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	nextForgers := []NextForger{}
 	// Create nextForger for each slot
@@ -136,7 +137,7 @@ func (a *API) getNextForgers(lastBlock common.Block, currentSlot, lastClosedSlot
 				foundBid = true
 				coordinator, err := a.h.GetCoordinatorAPI(bids[j].Bidder)
 				if err != nil {
-					return nil, err
+					return nil, tracerr.Wrap(err)
 				}
 				nextForger.Coordinator = *coordinator
 				break
@@ -160,7 +161,7 @@ func (a *API) UpdateMetrics() error {
 	a.status.RUnlock()
 	metrics, err := a.h.GetMetrics(batchNum)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	a.status.Lock()
 	a.status.Metrics = *metrics
@@ -174,7 +175,7 @@ func (a *API) UpdateMetrics() error {
 func (a *API) UpdateRecommendedFee() error {
 	feeExistingAccount, err := a.h.GetAvgTxFee()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	a.status.Lock()
 	a.status.RecommendedFee.ExistingAccount = feeExistingAccount

api/txspool.go

@@ -10,6 +10,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/apitypes"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db/l2db"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
@@ -156,21 +157,21 @@ func (a *API) verifyPoolL2TxWrite(txw *l2db.PoolL2TxWrite) error {
 	// Check type and id
 	_, err := common.NewPoolL2Tx(&poolTx)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// Get public key
 	account, err := a.s.GetAccount(poolTx.FromIdx)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// Validate feeAmount
 	_, err = common.CalcFeeAmount(poolTx.Amount, poolTx.Fee)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// Check signature
 	if !poolTx.VerifySignature(account.PublicKey) {
-		return errors.New("wrong signature")
+		return tracerr.Wrap(errors.New("wrong signature"))
 	}
 	return nil
 }

apitypes/apitypes.go

@@ -13,6 +13,7 @@ import (
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/hermeznetwork/hermez-node/common"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
@@ -35,7 +36,7 @@ func NewBigIntStr(bigInt *big.Int) *BigIntStr {
 func (b *BigIntStr) Scan(src interface{}) error {
 	srcBytes, ok := src.([]byte)
 	if !ok {
-		return fmt.Errorf("can't scan %T into apitypes.BigIntStr", src)
+		return tracerr.Wrap(fmt.Errorf("can't scan %T into apitypes.BigIntStr", src))
 	}
 	// bytes to *big.Int
 	bigInt := new(big.Int).SetBytes(srcBytes)
@@ -53,7 +54,7 @@ func (b BigIntStr) Value() (driver.Value, error) {
 	// string to *big.Int
 	bigInt, ok := new(big.Int).SetString(string(b), 10)
 	if !ok || bigInt == nil {
-		return nil, errors.New("invalid representation of a *big.Int")
+		return nil, tracerr.Wrap(errors.New("invalid representation of a *big.Int"))
 	}
 	// *big.Int to bytes
 	return bigInt.Bytes(), nil
@@ -66,7 +67,7 @@ type StrBigInt big.Int
 func (s *StrBigInt) UnmarshalText(text []byte) error {
 	bi, ok := (*big.Int)(s).SetString(string(text), 10)
 	if !ok {
-		return fmt.Errorf("could not unmarshal %s into a StrBigInt", text)
+		return tracerr.Wrap(fmt.Errorf("could not unmarshal %s into a StrBigInt", text))
 	}
 	*s = StrBigInt(*bi)
 	return nil
@@ -79,7 +80,7 @@ type CollectedFees map[common.TokenID]BigIntStr
 func (c *CollectedFees) UnmarshalJSON(text []byte) error {
 	bigIntMap := make(map[common.TokenID]*big.Int)
 	if err := json.Unmarshal(text, &bigIntMap); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	*c = CollectedFees(make(map[common.TokenID]BigIntStr))
 	for k, v := range bigIntMap {
@@ -110,7 +111,7 @@ func (a HezEthAddr) ToEthAddr() (ethCommon.Address, error) {
 func (a *HezEthAddr) Scan(src interface{}) error {
 	ethAddr := &ethCommon.Address{}
 	if err := ethAddr.Scan(src); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if ethAddr == nil {
 		return nil
@@ -123,7 +124,7 @@ func (a *HezEthAddr) Scan(src interface{}) error {
 func (a HezEthAddr) Value() (driver.Value, error) {
 	ethAddr, err := a.ToEthAddr()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return ethAddr.Value()
 }
@@ -136,7 +137,7 @@ func (s *StrHezEthAddr) UnmarshalText(text []byte) error {
 	withoutHez := strings.TrimPrefix(string(text), "hez:")
 	var addr ethCommon.Address
 	if err := addr.UnmarshalText([]byte(withoutHez)); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	*s = StrHezEthAddr(addr)
 	return nil
@@ -180,7 +181,7 @@ func hezStrToBJJ(s string) (*babyjub.PublicKey, error) {
 		sum += bjjBytes[i]
 	}
 	if decoded[decodedLen-1] != sum {
-		return nil, errors.New("checksum verification failed")
+		return nil, tracerr.Wrap(errors.New("checksum verification failed"))
 	}
 	bjjComp := babyjub.PublicKeyComp(bjjBytes)
 	return bjjComp.Decompress()
@@ -195,7 +196,7 @@ func (b HezBJJ) ToBJJ() (*babyjub.PublicKey, error) {
 func (b *HezBJJ) Scan(src interface{}) error {
 	bjj := &babyjub.PublicKey{}
 	if err := bjj.Scan(src); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if bjj == nil {
 		return nil
@@ -208,7 +209,7 @@ func (b *HezBJJ) Scan(src interface{}) error {
 func (b HezBJJ) Value() (driver.Value, error) {
 	bjj, err := b.ToBJJ()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return bjj.Value()
 }
@@ -220,7 +221,7 @@ type StrHezBJJ babyjub.PublicKey
 func (s *StrHezBJJ) UnmarshalText(text []byte) error {
 	bjj, err := hezStrToBJJ(string(text))
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	*s = StrHezBJJ(*bjj)
 	return nil
@@ -239,11 +240,11 @@ func (s *StrHezIdx) UnmarshalText(text []byte) error {
 	splitted := strings.Split(withoutHez, ":")
 	const expectedLen = 2
 	if len(splitted) != expectedLen {
-		return fmt.Errorf("can not unmarshal %s into StrHezIdx", text)
+		return tracerr.Wrap(fmt.Errorf("can not unmarshal %s into StrHezIdx", text))
 	}
 	idxInt, err := strconv.Atoi(splitted[1])
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	*s = StrHezIdx(common.Idx(idxInt))
 	return nil
@@ -274,7 +275,7 @@ func (e *EthSignature) Scan(src interface{}) error {
 		return nil
 	} else {
 		// unexpected src
-		return fmt.Errorf("can't scan %T into apitypes.EthSignature", src)
+		return tracerr.Wrap(fmt.Errorf("can't scan %T into apitypes.EthSignature", src))
 	}
 }
 
@@ -289,7 +290,7 @@ func (e *EthSignature) UnmarshalText(text []byte) error {
 	without0x := strings.TrimPrefix(string(text), "0x")
 	signature, err := hex.DecodeString(without0x)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	*e = EthSignature([]byte(signature))
 	return nil

apitypes/apitypes_test.go

@@ -12,7 +12,9 @@ import (
 	"github.com/hermeznetwork/hermez-node/common"
 	dbUtils "github.com/hermeznetwork/hermez-node/db"
 	"github.com/iden3/go-iden3-crypto/babyjub"
-	_ "github.com/mattn/go-sqlite3" //nolint sqlite driver
+
+	// nolint sqlite driver
+	_ "github.com/mattn/go-sqlite3"
 	"github.com/russross/meddler"
 	"github.com/stretchr/testify/assert"
 )

batchbuilder/batchbuilder.go

@@ -4,6 +4,7 @@ import (
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db/statedb"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // ConfigCircuit contains the circuit configuration
@@ -30,7 +31,7 @@ type ConfigBatch struct {
 func NewBatchBuilder(dbpath string, synchronizerStateDB *statedb.StateDB, configCircuits []ConfigCircuit, batchNum common.BatchNum, nLevels uint64) (*BatchBuilder, error) {
 	localStateDB, err := statedb.NewLocalStateDB(dbpath, synchronizerStateDB, statedb.TypeBatchBuilder, int(nLevels))
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	bb := BatchBuilder{
@@ -39,7 +40,7 @@ func NewBatchBuilder(dbpath string, synchronizerStateDB *statedb.StateDB, config
 	}
 
 	err = bb.Reset(batchNum, true)
-	return &bb, err
+	return &bb, tracerr.Wrap(err)
 }
 
 // Reset tells the BatchBuilder to reset it's internal state to the required
@@ -61,8 +62,8 @@ func (bb *BatchBuilder) BuildBatch(coordIdxs []common.Idx, configBatch *ConfigBa
 	}
 	ptOut, err := bb.localStateDB.ProcessTxs(ptc, coordIdxs, l1usertxs, l1coordinatortxs, pooll2txs)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	err = bb.localStateDB.MakeCheckpoint()
-	return ptOut.ZKInputs, err
+	return ptOut.ZKInputs, tracerr.Wrap(err)
 }

cli/node/main.go

@@ -24,20 +24,20 @@ func cmdInit(c *cli.Context) error {
 	log.Info("Init")
 	cfg, err := parseCli(c)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	fmt.Println("TODO", cfg)
-	return err
+	return tracerr.Wrap(err)
 }
 
 func cmdRun(c *cli.Context) error {
 	cfg, err := parseCli(c)
 	if err != nil {
-		return fmt.Errorf("error parsing flags and config: %w", err)
+		return tracerr.Wrap(fmt.Errorf("error parsing flags and config: %w", err))
 	}
 	node, err := node.NewNode(cfg.mode, cfg.node, cfg.coord)
 	if err != nil {
-		return fmt.Errorf("error starting node: %w", err)
+		return tracerr.Wrap(fmt.Errorf("error starting node: %w", err))
 	}
 	node.Start()
 
@@ -72,7 +72,7 @@ func parseCli(c *cli.Context) (*Config, error) {
 		if err := cli.ShowAppHelp(c); err != nil {
 			panic(err)
 		}
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return cfg, nil
 }
@@ -86,27 +86,27 @@ func getConfig(c *cli.Context) (*Config, error) {
 	case modeCoord:
 		cfg.mode = node.ModeCoordinator
 	default:
-		return nil, fmt.Errorf("invalid mode \"%v\"", mode)
+		return nil, tracerr.Wrap(fmt.Errorf("invalid mode \"%v\"", mode))
 	}
 
 	if cfg.mode == node.ModeCoordinator {
 		coordCfgPath := c.String(flagCoordCfg)
 		if coordCfgPath == "" {
-			return nil, fmt.Errorf("required flag \"%v\" not set", flagCoordCfg)
+			return nil, tracerr.Wrap(fmt.Errorf("required flag \"%v\" not set", flagCoordCfg))
 		}
 		coordCfg, err := config.LoadCoordinator(coordCfgPath)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		cfg.coord = coordCfg
 	}
 	nodeCfgPath := c.String(flagCfg)
 	if nodeCfgPath == "" {
-		return nil, fmt.Errorf("required flag \"%v\" not set", flagCfg)
+		return nil, tracerr.Wrap(fmt.Errorf("required flag \"%v\" not set", flagCfg))
 	}
 	nodeCfg, err := config.LoadNode(nodeCfgPath)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	// nodeCfg.Synchronizer.InitialVariables.WDelayer.HermezRollupAddress = nodeCfg.SmartContracts.Rollup
 	cfg.node = nodeCfg

common/account.go

@@ -8,6 +8,7 @@ import (
 	"strconv"
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	"github.com/iden3/go-iden3-crypto/poseidon"
 	cryptoUtils "github.com/iden3/go-iden3-crypto/utils"
@@ -51,7 +52,7 @@ func (idx Idx) String() string {
 // Bytes returns a byte array representing the Idx
 func (idx Idx) Bytes() ([6]byte, error) {
 	if idx > maxIdxValue {
-		return [6]byte{}, ErrIdxOverflow
+		return [6]byte{}, tracerr.Wrap(ErrIdxOverflow)
 	}
 	var idxBytes [8]byte
 	binary.BigEndian.PutUint64(idxBytes[:], uint64(idx))
@@ -68,7 +69,7 @@ func (idx Idx) BigInt() *big.Int {
 // IdxFromBytes returns Idx from a byte array
 func IdxFromBytes(b []byte) (Idx, error) {
 	if len(b) != IdxBytesLen {
-		return 0, fmt.Errorf("can not parse Idx, bytes len %d, expected %d", len(b), IdxBytesLen)
+		return 0, tracerr.Wrap(fmt.Errorf("can not parse Idx, bytes len %d, expected %d", len(b), IdxBytesLen))
 	}
 	var idxBytes [8]byte
 	copy(idxBytes[2:], b[:])
@@ -79,7 +80,7 @@ func IdxFromBytes(b []byte) (Idx, error) {
 // IdxFromBigInt converts a *big.Int to Idx type
 func IdxFromBigInt(b *big.Int) (Idx, error) {
 	if b.Int64() > maxIdxValue {
-		return 0, ErrNumOverflow
+		return 0, tracerr.Wrap(ErrNumOverflow)
 	}
 	return Idx(uint64(b.Int64())), nil
 }
@@ -90,7 +91,7 @@ type Nonce uint64
 // Bytes returns a byte array of length 5 representing the Nonce
 func (n Nonce) Bytes() ([5]byte, error) {
 	if n > maxNonceValue {
-		return [5]byte{}, ErrNonceOverflow
+		return [5]byte{}, tracerr.Wrap(ErrNonceOverflow)
 	}
 	var nonceBytes [8]byte
 	binary.BigEndian.PutUint64(nonceBytes[:], uint64(n))
@@ -143,22 +144,22 @@ func (a *Account) Bytes() ([32 * NLeafElems]byte, error) {
 	var b [32 * NLeafElems]byte
 
 	if a.Nonce > maxNonceValue {
-		return b, fmt.Errorf("%s Nonce", ErrNumOverflow)
+		return b, tracerr.Wrap(fmt.Errorf("%s Nonce", ErrNumOverflow))
 	}
 	if len(a.Balance.Bytes()) > maxBalanceBytes {
-		return b, fmt.Errorf("%s Balance", ErrNumOverflow)
+		return b, tracerr.Wrap(fmt.Errorf("%s Balance", ErrNumOverflow))
 	}
 
 	nonceBytes, err := a.Nonce.Bytes()
 	if err != nil {
-		return b, err
+		return b, tracerr.Wrap(err)
 	}
 
 	copy(b[28:32], a.TokenID.Bytes())
 	copy(b[23:28], nonceBytes[:])
 
 	if a.PublicKey == nil {
-		return b, fmt.Errorf("Account.PublicKey can not be nil")
+		return b, tracerr.Wrap(fmt.Errorf("Account.PublicKey can not be nil"))
 	}
 	if babyjub.PointCoordSign(a.PublicKey.X) {
 		b[22] = 1
@@ -178,7 +179,7 @@ func (a *Account) BigInts() ([NLeafElems]*big.Int, error) {
 
 	b, err := a.Bytes()
 	if err != nil {
-		return e, err
+		return e, tracerr.Wrap(err)
 	}
 
 	e[0] = new(big.Int).SetBytes(b[0:32])
@@ -193,7 +194,7 @@ func (a *Account) BigInts() ([NLeafElems]*big.Int, error) {
 func (a *Account) HashValue() (*big.Int, error) {
 	bi, err := a.BigInts()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return poseidon.Hash(bi[:])
 }
@@ -201,7 +202,7 @@ func (a *Account) HashValue() (*big.Int, error) {
 // AccountFromBigInts returns a Account from a [5]*big.Int
 func AccountFromBigInts(e [NLeafElems]*big.Int) (*Account, error) {
 	if !cryptoUtils.CheckBigIntArrayInField(e[:]) {
-		return nil, ErrNotInFF
+		return nil, tracerr.Wrap(ErrNotInFF)
 	}
 	e0B := e[0].Bytes()
 	e1B := e[1].Bytes()
@@ -220,7 +221,7 @@ func AccountFromBigInts(e [NLeafElems]*big.Int) (*Account, error) {
 func AccountFromBytes(b [32 * NLeafElems]byte) (*Account, error) {
 	tokenID, err := TokenIDFromBytes(b[28:32])
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	var nonceBytes5 [5]byte
 	copy(nonceBytes5[:], b[23:28])
@@ -230,21 +231,21 @@ func AccountFromBytes(b [32 * NLeafElems]byte) (*Account, error) {
 	balance := new(big.Int).SetBytes(b[40:64])
 	// Balance is max of 192 bits (24 bytes)
 	if !bytes.Equal(b[32:40], []byte{0, 0, 0, 0, 0, 0, 0, 0}) {
-		return nil, fmt.Errorf("%s Balance", ErrNumOverflow)
+		return nil, tracerr.Wrap(fmt.Errorf("%s Balance", ErrNumOverflow))
 	}
 	ay := new(big.Int).SetBytes(b[64:96])
 	pkPoint, err := babyjub.PointFromSignAndY(sign, ay)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	publicKey := babyjub.PublicKey(*pkPoint)
 	ethAddr := ethCommon.BytesToAddress(b[108:128])
 
 	if !cryptoUtils.CheckBigIntInField(balance) {
-		return nil, ErrNotInFF
+		return nil, tracerr.Wrap(ErrNotInFF)
 	}
 	if !cryptoUtils.CheckBigIntInField(ay) {
-		return nil, ErrNotInFF
+		return nil, tracerr.Wrap(ErrNotInFF)
 	}
 
 	a := Account{

common/account_test.go

@@ -10,6 +10,7 @@ import (
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	ethCrypto "github.com/ethereum/go-ethereum/crypto"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	cryptoConstants "github.com/iden3/go-iden3-crypto/constants"
 	"github.com/iden3/go-iden3-crypto/poseidon"
@@ -45,7 +46,7 @@ func TestIdxParser(t *testing.T) {
 	i = Idx(281474976710656)
 	iBytes, err = i.Bytes()
 	assert.NotNil(t, err)
-	assert.Equal(t, ErrIdxOverflow, err)
+	assert.Equal(t, ErrIdxOverflow, tracerr.Unwrap(err))
 }
 
 func TestNonceParser(t *testing.T) {
@@ -70,7 +71,7 @@ func TestNonceParser(t *testing.T) {
 	n = Nonce(1099511627776)
 	nBytes, err = n.Bytes()
 	assert.NotNil(t, err)
-	assert.Equal(t, ErrNonceOverflow, err)
+	assert.Equal(t, ErrNonceOverflow, tracerr.Unwrap(err))
 }
 
 func TestAccount(t *testing.T) {
@@ -296,14 +297,14 @@ func TestAccountErrNotInFF(t *testing.T) {
 	e = [NLeafElems]*big.Int{z, z, r, r}
 	_, err = AccountFromBigInts(e)
 	assert.NotNil(t, err)
-	assert.Equal(t, ErrNotInFF, err)
+	assert.Equal(t, ErrNotInFF, tracerr.Unwrap(err))
 
 	// Q+1 should give error
 	r = new(big.Int).Add(cryptoConstants.Q, big.NewInt(1))
 	e = [NLeafElems]*big.Int{z, z, r, r}
 	_, err = AccountFromBigInts(e)
 	assert.NotNil(t, err)
-	assert.Equal(t, ErrNotInFF, err)
+	assert.Equal(t, ErrNotInFF, tracerr.Unwrap(err))
 }
 
 func TestAccountErrNumOverflowNonce(t *testing.T) {
@@ -327,7 +328,7 @@ func TestAccountErrNumOverflowNonce(t *testing.T) {
 	account.Nonce = Nonce(math.Pow(2, 40))
 	b, err := account.Bytes()
 	assert.NotNil(t, err)
-	assert.Equal(t, fmt.Errorf("%s Nonce", ErrNumOverflow), err)
+	assert.Equal(t, fmt.Errorf("%s Nonce", ErrNumOverflow), tracerr.Unwrap(err))
 
 	_, err = AccountFromBytes(b)
 	assert.Nil(t, err)
@@ -357,7 +358,7 @@ func TestAccountErrNumOverflowBalance(t *testing.T) {
 	assert.Equal(t, "6277101735386680763835789423207666416102355444464034512896", account.Balance.String())
 	b, err := account.Bytes()
 	assert.NotNil(t, err)
-	assert.Equal(t, fmt.Errorf("%s Balance", ErrNumOverflow), err)
+	assert.Equal(t, fmt.Errorf("%s Balance", ErrNumOverflow), tracerr.Unwrap(err))
 
 	_, err = AccountFromBytes(b)
 	assert.Nil(t, err)
@@ -365,5 +366,5 @@ func TestAccountErrNumOverflowBalance(t *testing.T) {
 	b[39] = 1
 	_, err = AccountFromBytes(b)
 	assert.NotNil(t, err)
-	assert.Equal(t, fmt.Errorf("%s Balance", ErrNumOverflow), err)
+	assert.Equal(t, fmt.Errorf("%s Balance", ErrNumOverflow), tracerr.Unwrap(err))
 }

common/accountcreationauths.go

@@ -5,6 +5,7 @@ import (
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	ethCrypto "github.com/ethereum/go-ethereum/crypto"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
@@ -22,7 +23,7 @@ func (a *AccountCreationAuth) HashToSign() ([]byte, error) {
 	const msg = "I authorize this babyjubjub key for hermez rollup account creation"
 	comp, err := a.BJJ.Compress().MarshalText()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	// Hash message (msg || compressed-bjj)
 	return ethCrypto.Keccak256Hash([]byte(msg), comp).Bytes(), nil

common/batch.go

@@ -6,6 +6,7 @@ import (
 	"math/big"
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
+	"github.com/hermeznetwork/tracerr"
 )
 
 const batchNumBytesLen = 8
@@ -44,7 +45,7 @@ func (bn BatchNum) BigInt() *big.Int {
 // BatchNumFromBytes returns BatchNum from a []byte
 func BatchNumFromBytes(b []byte) (BatchNum, error) {
 	if len(b) != batchNumBytesLen {
-		return 0, fmt.Errorf("can not parse BatchNumFromBytes, bytes len %d, expected %d", len(b), batchNumBytesLen)
+		return 0, tracerr.Wrap(fmt.Errorf("can not parse BatchNumFromBytes, bytes len %d, expected %d", len(b), batchNumBytesLen))
 	}
 	batchNum := binary.BigEndian.Uint64(b[:batchNumBytesLen])
 	return BatchNum(batchNum), nil

common/fee.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"math"
 	"math/big"
+
+	"github.com/hermeznetwork/tracerr"
 )
 
 // MaxFeePlan is the maximum value of the FeePlan
@@ -49,7 +51,7 @@ func CalcFeeAmount(amount *big.Int, feeSel FeeSelector) (*big.Int, error) {
 		feeAmount.Rsh(feeAmount, 60)
 	}
 	if feeAmount.BitLen() > 128 { //nolint:gomnd
-		return nil, fmt.Errorf("FeeAmount overflow (feeAmount doesn't fit in 128 bits)")
+		return nil, tracerr.Wrap(fmt.Errorf("FeeAmount overflow (feeAmount doesn't fit in 128 bits)"))
 	}
 	return feeAmount, nil
 }

common/float16.go

@@ -9,6 +9,8 @@ import (
 	"encoding/binary"
 	"errors"
 	"math/big"
+
+	"github.com/hermeznetwork/tracerr"
 )
 
 var (
@@ -112,7 +114,7 @@ func NewFloat16(f *big.Int) (Float16, error) {
 	if res.BigInt().Cmp(f) == 0 {
 		return res, nil
 	}
-	return res, ErrRoundingLoss
+	return res, tracerr.Wrap(ErrRoundingLoss)
 }
 
 // NewFloat16Floor encodes a big.Int integer as a Float16, rounding down in

common/float16_test.go

@@ -4,6 +4,7 @@ import (
 	"math/big"
 	"testing"
 
+	"github.com/hermeznetwork/tracerr"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -65,25 +66,25 @@ func TestConversionLosses(t *testing.T) {
 
 	a = big.NewInt(1024)
 	b, err = NewFloat16(a)
-	assert.Equal(t, ErrRoundingLoss, err)
+	assert.Equal(t, ErrRoundingLoss, tracerr.Unwrap(err))
 	c = b.BigInt()
 	assert.NotEqual(t, c, a)
 
 	a = big.NewInt(32767)
 	b, err = NewFloat16(a)
-	assert.Equal(t, ErrRoundingLoss, err)
+	assert.Equal(t, ErrRoundingLoss, tracerr.Unwrap(err))
 	c = b.BigInt()
 	assert.NotEqual(t, c, a)
 
 	a = big.NewInt(32768)
 	b, err = NewFloat16(a)
-	assert.Equal(t, ErrRoundingLoss, err)
+	assert.Equal(t, ErrRoundingLoss, tracerr.Unwrap(err))
 	c = b.BigInt()
 	assert.NotEqual(t, c, a)
 
 	a = big.NewInt(65536000)
 	b, err = NewFloat16(a)
-	assert.Equal(t, ErrRoundingLoss, err)
+	assert.Equal(t, ErrRoundingLoss, tracerr.Unwrap(err))
 	c = b.BigInt()
 	assert.NotEqual(t, c, a)
 }

common/l1tx.go

@@ -7,6 +7,7 @@ import (
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
@@ -58,7 +59,7 @@ func NewL1Tx(l1Tx *L1Tx) (*L1Tx, error) {
 		} else if l1Tx.ToIdx >= IdxUserThreshold {
 			txType = TxTypeCreateAccountDepositTransfer
 		} else {
-			return l1Tx, fmt.Errorf("Can not determine type of L1Tx, invalid ToIdx value: %d", l1Tx.ToIdx)
+			return l1Tx, tracerr.Wrap(fmt.Errorf("Can not determine type of L1Tx, invalid ToIdx value: %d", l1Tx.ToIdx))
 		}
 	} else if l1Tx.FromIdx >= IdxUserThreshold {
 		if l1Tx.ToIdx == Idx(0) {
@@ -72,20 +73,20 @@ func NewL1Tx(l1Tx *L1Tx) (*L1Tx, error) {
 				txType = TxTypeDepositTransfer
 			}
 		} else {
-			return l1Tx, fmt.Errorf("Can not determine type of L1Tx, invalid ToIdx value: %d", l1Tx.ToIdx)
+			return l1Tx, tracerr.Wrap(fmt.Errorf("Can not determine type of L1Tx, invalid ToIdx value: %d", l1Tx.ToIdx))
 		}
 	} else {
-		return l1Tx, fmt.Errorf("Can not determine type of L1Tx, invalid FromIdx value: %d", l1Tx.FromIdx)
+		return l1Tx, tracerr.Wrap(fmt.Errorf("Can not determine type of L1Tx, invalid FromIdx value: %d", l1Tx.FromIdx))
 	}
 
 	if l1Tx.Type != "" && l1Tx.Type != txType {
-		return l1Tx, fmt.Errorf("L1Tx.Type: %s, should be: %s", l1Tx.Type, txType)
+		return l1Tx, tracerr.Wrap(fmt.Errorf("L1Tx.Type: %s, should be: %s", l1Tx.Type, txType))
 	}
 	l1Tx.Type = txType
 
 	txID, err := l1Tx.CalcTxID()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	l1Tx.TxID = *txID
 
@@ -97,7 +98,7 @@ func (tx *L1Tx) CalcTxID() (*TxID, error) {
 	var txID TxID
 	if tx.UserOrigin {
 		if tx.ToForgeL1TxsNum == nil {
-			return nil, fmt.Errorf("L1Tx.UserOrigin == true && L1Tx.ToForgeL1TxsNum == nil")
+			return nil, tracerr.Wrap(fmt.Errorf("L1Tx.UserOrigin == true && L1Tx.ToForgeL1TxsNum == nil"))
 		}
 		txID[0] = TxIDPrefixL1UserTx
 		var toForgeL1TxsNumBytes [8]byte
@@ -105,7 +106,7 @@ func (tx *L1Tx) CalcTxID() (*TxID, error) {
 		copy(txID[1:9], toForgeL1TxsNumBytes[:])
 	} else {
 		if tx.BatchNum == nil {
-			return nil, fmt.Errorf("L1Tx.UserOrigin == false && L1Tx.BatchNum == nil")
+			return nil, tracerr.Wrap(fmt.Errorf("L1Tx.UserOrigin == false && L1Tx.BatchNum == nil"))
 		}
 		txID[0] = TxIDPrefixL1CoordTx
 		var batchNumBytes [8]byte
@@ -164,7 +165,7 @@ func (tx L1Tx) Tx() Tx {
 func (tx L1Tx) TxCompressedData() (*big.Int, error) {
 	amountFloat16, err := NewFloat16(tx.Amount)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	var b [31]byte
 	// b[0:7] empty: no fee neither nonce
@@ -172,12 +173,12 @@ func (tx L1Tx) TxCompressedData() (*big.Int, error) {
 	copy(b[11:13], amountFloat16.Bytes())
 	toIdxBytes, err := tx.ToIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[13:19], toIdxBytes[:])
 	fromIdxBytes, err := tx.FromIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[19:25], fromIdxBytes[:])
 	copy(b[25:27], []byte{0, 1}) // TODO this will be generated by the ChainID config parameter
@@ -195,19 +196,19 @@ func (tx *L1Tx) BytesDataAvailability(nLevels uint32) ([]byte, error) {
 
 	fromIdxBytes, err := tx.FromIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[0:idxLen], fromIdxBytes[6-idxLen:])
 	toIdxBytes, err := tx.ToIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[idxLen:idxLen*2], toIdxBytes[6-idxLen:])
 
 	if tx.EffectiveAmount != nil {
 		amountFloat16, err := NewFloat16(tx.EffectiveAmount)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		copy(b[idxLen*2:idxLen*2+2], amountFloat16.Bytes())
 	}
@@ -229,23 +230,23 @@ func (tx *L1Tx) BytesGeneric() ([]byte, error) {
 	}
 	fromIdxBytes, err := tx.FromIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[52:58], fromIdxBytes[:])
 	loadAmountFloat16, err := NewFloat16(tx.LoadAmount)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[58:60], loadAmountFloat16.Bytes())
 	amountFloat16, err := NewFloat16(tx.Amount)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[60:62], amountFloat16.Bytes())
 	copy(b[62:66], tx.TokenID.Bytes())
 	toIdxBytes, err := tx.ToIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[66:72], toIdxBytes[:])
 	return b[:], nil
@@ -254,7 +255,7 @@ func (tx *L1Tx) BytesGeneric() ([]byte, error) {
 // BytesUser encodes a L1UserTx into []byte
 func (tx *L1Tx) BytesUser() ([]byte, error) {
 	if !tx.UserOrigin {
-		return nil, fmt.Errorf("Can not calculate BytesUser() for a L1CoordinatorTx")
+		return nil, tracerr.Wrap(fmt.Errorf("Can not calculate BytesUser() for a L1CoordinatorTx"))
 	}
 	return tx.BytesGeneric()
 }
@@ -262,7 +263,7 @@ func (tx *L1Tx) BytesUser() ([]byte, error) {
 // BytesCoordinatorTx encodes a L1CoordinatorTx into []byte
 func (tx *L1Tx) BytesCoordinatorTx(compressedSignatureBytes []byte) ([]byte, error) {
 	if tx.UserOrigin {
-		return nil, fmt.Errorf("Can not calculate BytesCoordinatorTx() for a L1UserTx")
+		return nil, tracerr.Wrap(fmt.Errorf("Can not calculate BytesCoordinatorTx() for a L1UserTx"))
 	}
 	var b [L1CoordinatorTxBytesLen]byte
 	v := compressedSignatureBytes[64]
@@ -281,7 +282,7 @@ func (tx *L1Tx) BytesCoordinatorTx(compressedSignatureBytes []byte) ([]byte, err
 // L1UserTxFromBytes decodes a L1Tx from []byte
 func L1UserTxFromBytes(b []byte) (*L1Tx, error) {
 	if len(b) != L1UserTxBytesLen {
-		return nil, fmt.Errorf("Can not parse L1Tx bytes, expected length %d, current: %d", 68, len(b))
+		return nil, tracerr.Wrap(fmt.Errorf("Can not parse L1Tx bytes, expected length %d, current: %d", 68, len(b)))
 	}
 
 	tx := &L1Tx{
@@ -296,22 +297,22 @@ func L1UserTxFromBytes(b []byte) (*L1Tx, error) {
 	copy(pkComp[:], pkCompL)
 	tx.FromBJJ, err = pkComp.Decompress()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	fromIdx, err := IdxFromBytes(b[52:58])
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	tx.FromIdx = fromIdx
 	tx.LoadAmount = Float16FromBytes(b[58:60]).BigInt()
 	tx.Amount = Float16FromBytes(b[60:62]).BigInt()
 	tx.TokenID, err = TokenIDFromBytes(b[62:66])
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	tx.ToIdx, err = IdxFromBytes(b[66:72])
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	return tx, nil
@@ -325,7 +326,7 @@ func signHash(data []byte) []byte {
 // L1CoordinatorTxFromBytes decodes a L1Tx from []byte
 func L1CoordinatorTxFromBytes(b []byte, chainID *big.Int, hermezAddress ethCommon.Address) (*L1Tx, error) {
 	if len(b) != L1CoordinatorTxBytesLen {
-		return nil, fmt.Errorf("Can not parse L1CoordinatorTx bytes, expected length %d, current: %d", 101, len(b))
+		return nil, tracerr.Wrap(fmt.Errorf("Can not parse L1CoordinatorTx bytes, expected length %d, current: %d", 101, len(b)))
 	}
 
 	bytesMessage := []byte("I authorize this babyjubjub key for hermez rollup account creation")
@@ -343,11 +344,11 @@ func L1CoordinatorTxFromBytes(b []byte, chainID *big.Int, hermezAddress ethCommo
 	copy(pkComp[:], pkCompL)
 	tx.FromBJJ, err = pkComp.Decompress()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	tx.TokenID, err = TokenIDFromBytes(b[97:101])
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	tx.Amount = big.NewInt(0)
 	tx.LoadAmount = big.NewInt(0)
@@ -368,11 +369,11 @@ func L1CoordinatorTxFromBytes(b []byte, chainID *big.Int, hermezAddress ethCommo
 		hash := signHash(data)
 		pubKeyBytes, err := crypto.Ecrecover(hash, signature)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		pubKey, err := crypto.UnmarshalPubkey(pubKeyBytes)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		tx.FromEthAddr = crypto.PubkeyToAddress(*pubKey)
 	} else {

common/l2tx.go

@@ -3,6 +3,8 @@ package common
 import (
 	"fmt"
 	"math/big"
+
+	"github.com/hermeznetwork/tracerr"
 )
 
 // L2Tx is a struct that represents an already forged L2 tx
@@ -30,12 +32,12 @@ func NewL2Tx(l2Tx *L2Tx) (*L2Tx, error) {
 	} else if l2Tx.ToIdx >= IdxUserThreshold {
 		txType = TxTypeTransfer
 	} else {
-		return l2Tx, fmt.Errorf("Can not determine type of L2Tx, invalid ToIdx value: %d", l2Tx.ToIdx)
+		return l2Tx, tracerr.Wrap(fmt.Errorf("Can not determine type of L2Tx, invalid ToIdx value: %d", l2Tx.ToIdx))
 	}
 
 	// if TxType!=l2Tx.TxType return error
 	if l2Tx.Type != "" && l2Tx.Type != txType {
-		return l2Tx, fmt.Errorf("L2Tx.Type: %s, should be: %s", l2Tx.Type, txType)
+		return l2Tx, tracerr.Wrap(fmt.Errorf("L2Tx.Type: %s, should be: %s", l2Tx.Type, txType))
 	}
 	l2Tx.Type = txType
 
@@ -43,12 +45,12 @@ func NewL2Tx(l2Tx *L2Tx) (*L2Tx, error) {
 	txid[0] = TxIDPrefixL2Tx
 	fromIdxBytes, err := l2Tx.FromIdx.Bytes()
 	if err != nil {
-		return l2Tx, err
+		return l2Tx, tracerr.Wrap(err)
 	}
 	copy(txid[1:7], fromIdxBytes[:])
 	nonceBytes, err := l2Tx.Nonce.Bytes()
 	if err != nil {
-		return l2Tx, err
+		return l2Tx, tracerr.Wrap(err)
 	}
 	copy(txid[7:12], nonceBytes[:])
 	l2Tx.TxID = TxID(txid)
@@ -111,19 +113,19 @@ func (tx L2Tx) BytesDataAvailability(nLevels uint32) ([]byte, error) {
 
 	fromIdxBytes, err := tx.FromIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[0:idxLen], fromIdxBytes[6-idxLen:]) // [6-idxLen:] as is BigEndian
 
 	toIdxBytes, err := tx.ToIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[idxLen:idxLen*2], toIdxBytes[6-idxLen:])
 
 	amountFloat16, err := NewFloat16(tx.Amount)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	copy(b[idxLen*2:idxLen*2+2], amountFloat16.Bytes())
@@ -142,14 +144,14 @@ func L2TxFromBytes(b []byte, nLevels int) (*L2Tx, error) {
 	copy(paddedFromIdxBytes[6-idxLen:], b[0:idxLen])
 	tx.FromIdx, err = IdxFromBytes(paddedFromIdxBytes[:])
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	var paddedToIdxBytes [6]byte
 	copy(paddedToIdxBytes[6-idxLen:6], b[idxLen:idxLen*2])
 	tx.ToIdx, err = IdxFromBytes(paddedToIdxBytes[:])
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	tx.Amount = Float16FromBytes(b[idxLen*2 : idxLen*2+2]).BigInt()

common/pooll2tx.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	"github.com/iden3/go-iden3-crypto/poseidon"
 )
@@ -63,12 +64,12 @@ func NewPoolL2Tx(poolL2Tx *PoolL2Tx) (*PoolL2Tx, error) {
 			txType = TxTypeTransferToEthAddr
 		}
 	} else {
-		return nil, errors.New("malformed transaction")
+		return nil, tracerr.Wrap(errors.New("malformed transaction"))
 	}
 
 	// if TxType!=poolL2Tx.TxType return error
 	if poolL2Tx.Type != "" && poolL2Tx.Type != txType {
-		return poolL2Tx, fmt.Errorf("type: %s, should be: %s", poolL2Tx.Type, txType)
+		return poolL2Tx, tracerr.Wrap(fmt.Errorf("type: %s, should be: %s", poolL2Tx.Type, txType))
 	}
 	poolL2Tx.Type = txType
 
@@ -76,19 +77,19 @@ func NewPoolL2Tx(poolL2Tx *PoolL2Tx) (*PoolL2Tx, error) {
 	txid[0] = TxIDPrefixL2Tx
 	fromIdxBytes, err := poolL2Tx.FromIdx.Bytes()
 	if err != nil {
-		return poolL2Tx, err
+		return poolL2Tx, tracerr.Wrap(err)
 	}
 	copy(txid[1:7], fromIdxBytes[:])
 	nonceBytes, err := poolL2Tx.Nonce.Bytes()
 	if err != nil {
-		return poolL2Tx, err
+		return poolL2Tx, tracerr.Wrap(err)
 	}
 	copy(txid[7:12], nonceBytes[:])
 	txID := TxID(txid)
 
 	// if TxID!=poolL2Tx.TxID return error
 	if poolL2Tx.TxID != (TxID{}) && poolL2Tx.TxID != txID {
-		return poolL2Tx, fmt.Errorf("id: %s, should be: %s", poolL2Tx.TxID.String(), txID.String())
+		return poolL2Tx, tracerr.Wrap(fmt.Errorf("id: %s, should be: %s", poolL2Tx.TxID.String(), txID.String()))
 	}
 	poolL2Tx.TxID = txID
 	return poolL2Tx, nil
@@ -109,12 +110,12 @@ func (tx *PoolL2Tx) TxCompressedData() (*big.Int, error) {
 	// sigconstant
 	sc, ok := new(big.Int).SetString("3322668559", 10)
 	if !ok {
-		return nil, fmt.Errorf("error parsing SignatureConstant")
+		return nil, tracerr.Wrap(fmt.Errorf("error parsing SignatureConstant"))
 	}
 
 	amountFloat16, err := NewFloat16(tx.Amount)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	var b [31]byte
 	toBJJSign := byte(0)
@@ -125,19 +126,19 @@ func (tx *PoolL2Tx) TxCompressedData() (*big.Int, error) {
 	b[1] = byte(tx.Fee)
 	nonceBytes, err := tx.Nonce.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[2:7], nonceBytes[:])
 	copy(b[7:11], tx.TokenID.Bytes())
 	copy(b[11:13], amountFloat16.Bytes())
 	toIdxBytes, err := tx.ToIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[13:19], toIdxBytes[:])
 	fromIdxBytes, err := tx.FromIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[19:25], fromIdxBytes[:])
 	copy(b[25:27], []byte{0, 1}) // TODO this will be generated by the ChainID config parameter
@@ -162,7 +163,7 @@ func (tx *PoolL2Tx) TxCompressedDataV2() (*big.Int, error) {
 	}
 	amountFloat16, err := NewFloat16(tx.Amount)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	var b [25]byte
 	toBJJSign := byte(0)
@@ -173,19 +174,19 @@ func (tx *PoolL2Tx) TxCompressedDataV2() (*big.Int, error) {
 	b[1] = byte(tx.Fee)
 	nonceBytes, err := tx.Nonce.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[2:7], nonceBytes[:])
 	copy(b[7:11], tx.TokenID.Bytes())
 	copy(b[11:13], amountFloat16.Bytes())
 	toIdxBytes, err := tx.ToIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[13:19], toIdxBytes[:])
 	fromIdxBytes, err := tx.FromIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[19:25], fromIdxBytes[:])
 
@@ -213,7 +214,7 @@ func (tx *PoolL2Tx) RqTxCompressedDataV2() (*big.Int, error) {
 	}
 	amountFloat16, err := NewFloat16(tx.RqAmount)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	var b [25]byte
 	toBJJSign := byte(0)
@@ -224,19 +225,19 @@ func (tx *PoolL2Tx) RqTxCompressedDataV2() (*big.Int, error) {
 	b[1] = byte(tx.RqFee)
 	nonceBytes, err := tx.RqNonce.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[2:7], nonceBytes[:])
 	copy(b[7:11], tx.RqTokenID.Bytes())
 	copy(b[11:13], amountFloat16.Bytes())
 	toIdxBytes, err := tx.RqToIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[13:19], toIdxBytes[:])
 	fromIdxBytes, err := tx.RqFromIdx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(b[19:25], fromIdxBytes[:])
 
@@ -248,7 +249,7 @@ func (tx *PoolL2Tx) RqTxCompressedDataV2() (*big.Int, error) {
 func (tx *PoolL2Tx) HashToSign() (*big.Int, error) {
 	toCompressedData, err := tx.TxCompressedData()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	toEthAddr := EthAddrToBigInt(tx.ToEthAddr)
 	rqToEthAddr := EthAddrToBigInt(tx.RqToEthAddr)
@@ -258,7 +259,7 @@ func (tx *PoolL2Tx) HashToSign() (*big.Int, error) {
 	}
 	rqTxCompressedDataV2, err := tx.RqTxCompressedDataV2()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	rqToBJJY := big.NewInt(0)
 	if tx.RqToBJJ != nil {

common/token.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // tokenIDBytesLen defines the length of the TokenID byte array representation
@@ -47,7 +48,7 @@ func (t TokenID) BigInt() *big.Int {
 // TokenIDFromBytes returns TokenID from a byte array
 func TokenIDFromBytes(b []byte) (TokenID, error) {
 	if len(b) != tokenIDBytesLen {
-		return 0, fmt.Errorf("can not parse TokenID, bytes len %d, expected 4", len(b))
+		return 0, tracerr.Wrap(fmt.Errorf("can not parse TokenID, bytes len %d, expected 4", len(b)))
 	}
 	tid := binary.BigEndian.Uint32(b[:4])
 	return TokenID(tid), nil

common/tx.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
@@ -40,10 +41,10 @@ type TxID [TxIDLen]byte
 func (txid *TxID) Scan(src interface{}) error {
 	srcB, ok := src.([]byte)
 	if !ok {
-		return fmt.Errorf("can't scan %T into TxID", src)
+		return tracerr.Wrap(fmt.Errorf("can't scan %T into TxID", src))
 	}
 	if len(srcB) != TxIDLen {
-		return fmt.Errorf("can't scan []byte of len %d into TxID, need %d", len(srcB), TxIDLen)
+		return tracerr.Wrap(fmt.Errorf("can't scan []byte of len %d into TxID, need %d", len(srcB), TxIDLen))
 	}
 	copy(txid[:], srcB)
 	return nil
@@ -65,10 +66,10 @@ func NewTxIDFromString(idStr string) (TxID, error) {
 	idStr = strings.TrimPrefix(idStr, "0x")
 	decoded, err := hex.DecodeString(idStr)
 	if err != nil {
-		return TxID{}, err
+		return TxID{}, tracerr.Wrap(err)
 	}
 	if len(decoded) != TxIDLen {
-		return txid, errors.New("Invalid idStr")
+		return txid, tracerr.Wrap(errors.New("Invalid idStr"))
 	}
 	copy(txid[:], decoded)
 	return txid, nil
@@ -84,7 +85,7 @@ func (txid *TxID) UnmarshalText(data []byte) error {
 	idStr := string(data)
 	id, err := NewTxIDFromString(idStr)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	*txid = id
 	return nil

common/utils.go

@@ -5,6 +5,7 @@ import (
 	"math/big"
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
@@ -29,7 +30,7 @@ func EthAddrToBigInt(a ethCommon.Address) *big.Int {
 func BJJFromStringWithChecksum(s string) (*babyjub.PublicKey, error) {
 	b, err := hex.DecodeString(s)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	pkBytes := SwapEndianness(b)
 	var pkComp babyjub.PublicKeyComp

common/zk.go

@@ -10,6 +10,7 @@ import (
 	"math/big"
 
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 	cryptoConstants "github.com/iden3/go-iden3-crypto/constants"
 	"github.com/iden3/go-merkletree"
 	"github.com/mitchellh/mapstructure"
@@ -258,11 +259,11 @@ func (z ZKInputs) MarshalJSON() ([]byte, error) {
 		Result:  &m,
 	})
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	err = dec.Decode(z)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	for k, v := range m {
@@ -398,13 +399,13 @@ func newSlice(n uint32) []*big.Int {
 func (z ZKInputs) HashGlobalData() (*big.Int, error) {
 	b, err := z.ToHashGlobalData()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	h := sha256.New()
 	_, err = h.Write(b)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	r := new(big.Int).SetBytes(h.Sum(nil))
@@ -427,7 +428,7 @@ func (z ZKInputs) ToHashGlobalData() ([]byte, error) {
 	newLastIdx := make([]byte, bytesMaxLevels)
 	newLastIdxBytes, err := z.Metadata.NewLastIdxRaw.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	copy(newLastIdx, newLastIdxBytes[len(newLastIdxBytes)-bytesMaxLevels:])
 	b = append(b, newLastIdx...)
@@ -474,7 +475,7 @@ func (z ZKInputs) ToHashGlobalData() ([]byte, error) {
 		l2TxsData = append(l2TxsData, z.Metadata.L2TxsData[i]...)
 	}
 	if len(l2TxsData) > int(expectedL2TxsDataLen) {
-		return nil, fmt.Errorf("len(l2TxsData): %d, expected: %d", len(l2TxsData), expectedL2TxsDataLen)
+		return nil, tracerr.Wrap(fmt.Errorf("len(l2TxsData): %d, expected: %d", len(l2TxsData), expectedL2TxsDataLen))
 	}
 
 	b = append(b, l2TxsData...)

config/config.go

@@ -9,6 +9,7 @@ import (
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/synchronizer"
+	"github.com/hermeznetwork/tracerr"
 	"gopkg.in/go-playground/validator.v9"
 )
 
@@ -21,7 +22,7 @@ type Duration struct {
 func (d *Duration) UnmarshalText(data []byte) error {
 	duration, err := time.ParseDuration(string(data))
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	d.Duration = duration
 	return nil
@@ -104,15 +105,15 @@ type Node struct {
 func Load(path string, cfg interface{}) error {
 	bs, err := ioutil.ReadFile(path) //nolint:gosec
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	cfgToml := string(bs)
 	if _, err := toml.Decode(cfgToml, cfg); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	validate := validator.New()
 	if err := validate.Struct(cfg); err != nil {
-		return fmt.Errorf("error validating configuration file: %w", err)
+		return tracerr.Wrap(fmt.Errorf("error validating configuration file: %w", err))
 	}
 	return nil
 }
@@ -121,7 +122,7 @@ func Load(path string, cfg interface{}) error {
 func LoadCoordinator(path string) (*Coordinator, error) {
 	var cfg Coordinator
 	if err := Load(path, &cfg); err != nil {
-		return nil, fmt.Errorf("error loading coordinator configuration file: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("error loading coordinator configuration file: %w", err))
 	}
 	return &cfg, nil
 }
@@ -130,7 +131,7 @@ func LoadCoordinator(path string) (*Coordinator, error) {
 func LoadNode(path string) (*Node, error) {
 	var cfg Node
 	if err := Load(path, &cfg); err != nil {
-		return nil, fmt.Errorf("error loading node configuration file: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("error loading node configuration file: %w", err))
 	}
 	return &cfg, nil
 }

coordinator/batch.go

@@ -9,6 +9,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/eth"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // Proof TBD this type will be received from the proof server
@@ -46,7 +47,7 @@ type BatchInfo struct {
 func (b *BatchInfo) DebugStore(storePath string) error {
 	batchJSON, err := json.Marshal(b)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	oldStateRoot := "null"
 	if b.ZKInputs != nil && b.ZKInputs.OldStateRoot != nil {

coordinator/coordinator.go

@@ -15,6 +15,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/log"
 	"github.com/hermeznetwork/hermez-node/synchronizer"
 	"github.com/hermeznetwork/hermez-node/txselector"
+	"github.com/hermeznetwork/tracerr"
 )
 
 var errTODO = fmt.Errorf("TODO")
@@ -93,12 +94,12 @@ func NewCoordinator(cfg Config,
 ) (*Coordinator, error) {
 	// nolint reason: hardcoded `1.0`, by design the percentage can't be over 100%
 	if cfg.L1BatchTimeoutPerc >= 1.0 { //nolint:gomnd
-		return nil, fmt.Errorf("invalid value for Config.L1BatchTimeoutPerc (%v >= 1.0)",
+		return nil, tracerr.Wrap(fmt.Errorf("invalid value for Config.L1BatchTimeoutPerc (%v >= 1.0)",
-			cfg.L1BatchTimeoutPerc)
+			cfg.L1BatchTimeoutPerc))
 	}
 	if cfg.EthClientAttempts < 1 {
-		return nil, fmt.Errorf("invalid value for Config.EthClientAttempts (%v < 1)",
+		return nil, tracerr.Wrap(fmt.Errorf("invalid value for Config.EthClientAttempts (%v < 1)",
-			cfg.EthClientAttempts)
+			cfg.EthClientAttempts))
 	}
 
 	txManager := NewTxManager(&cfg, ethClient)
@@ -192,7 +193,7 @@ func (c *Coordinator) handleMsgSyncStats(stats *synchronizer.Stats) error {
 			batchNum := common.BatchNum(stats.Sync.LastBatch)
 			c.pipeline = c.newPipeline()
 			if err := c.pipeline.Start(batchNum, stats, &c.vars); err != nil {
-				return err
+				return tracerr.Wrap(err)
 			}
 		}
 	} else {
@@ -318,12 +319,12 @@ func (t *TxManager) rollupForgeBatch(ctx context.Context, batchInfo *BatchInfo)
 		}
 		select {
 		case <-ctx.Done():
-			return ErrDone
+			return tracerr.Wrap(ErrDone)
 		case <-time.After(t.cfg.EthClientAttemptsDelay):
 		}
 	}
 	if err != nil {
-		return fmt.Errorf("reached max attempts for ethClient.RollupForgeBatch: %w", err)
+		return tracerr.Wrap(fmt.Errorf("reached max attempts for ethClient.RollupForgeBatch: %w", err))
 	}
 	batchInfo.EthTx = ethTx
 	t.cfg.debugBatchStore(batchInfo)
@@ -344,12 +345,12 @@ func (t *TxManager) ethTransactionReceipt(ctx context.Context, batchInfo *BatchI
 		}
 		select {
 		case <-ctx.Done():
-			return ErrDone
+			return tracerr.Wrap(ErrDone)
 		case <-time.After(t.cfg.EthClientAttemptsDelay):
 		}
 	}
 	if err != nil {
-		return fmt.Errorf("reached max attempts for ethClient.EthTransactionReceipt: %w", err)
+		return tracerr.Wrap(fmt.Errorf("reached max attempts for ethClient.EthTransactionReceipt: %w", err))
 	}
 	batchInfo.Receipt = receipt
 	t.cfg.debugBatchStore(batchInfo)
@@ -361,7 +362,7 @@ func (t *TxManager) handleReceipt(batchInfo *BatchInfo) (*int64, error) {
 	if receipt != nil {
 		if receipt.Status == types.ReceiptStatusFailed {
 			log.Errorw("TxManager receipt status is failed", "receipt", receipt)
-			return nil, fmt.Errorf("ethereum transaction receipt statis is failed")
+			return nil, tracerr.Wrap(fmt.Errorf("ethereum transaction receipt statis is failed"))
 		} else if receipt.Status == types.ReceiptStatusSuccessful {
 			confirm := t.lastBlock - receipt.BlockNumber.Int64()
 			return &confirm, nil
@@ -384,7 +385,7 @@ func (t *TxManager) Run(ctx context.Context) {
 		case lastBlock := <-t.lastBlockCh:
 			t.lastBlock = lastBlock
 		case batchInfo := <-t.batchCh:
-			if err := t.rollupForgeBatch(ctx, batchInfo); err == ErrDone {
+			if err := t.rollupForgeBatch(ctx, batchInfo); tracerr.Unwrap(err) == ErrDone {
 				continue
 			} else if err != nil {
 				// TODO: Reset pipeline
@@ -399,7 +400,7 @@ func (t *TxManager) Run(ctx context.Context) {
 			}
 			batchInfo := t.queue[next]
 			err := t.ethTransactionReceipt(ctx, batchInfo)
-			if err == ErrDone {
+			if tracerr.Unwrap(err) == ErrDone {
 				continue
 			} else if err != nil { //nolint:staticcheck
 				// We can't get the receipt for the
@@ -504,12 +505,12 @@ func (p *Pipeline) Start(batchNum common.BatchNum,
 	err := p.txSelector.Reset(p.batchNum)
 	if err != nil {
 		log.Errorw("Pipeline: TxSelector.Reset", "error", err)
-		return err
+		return tracerr.Wrap(err)
 	}
 	err = p.batchBuilder.Reset(p.batchNum, true)
 	if err != nil {
 		log.Errorw("Pipeline: BatchBuilder.Reset", "error", err)
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	queueSize := 1
@@ -528,7 +529,7 @@ func (p *Pipeline) Start(batchNum common.BatchNum,
 			default:
 				p.batchNum = p.batchNum + 1
 				batchInfo, err := p.forgeSendServerProof(p.ctx, p.batchNum)
-				if err == ErrDone {
+				if tracerr.Unwrap(err) == ErrDone {
 					continue
 				}
 				if err != nil {
@@ -550,7 +551,7 @@ func (p *Pipeline) Start(batchNum common.BatchNum,
 				return
 			case batchInfo := <-batchChSentServerProof:
 				err := p.waitServerProof(p.ctx, batchInfo)
-				if err == ErrDone {
+				if tracerr.Unwrap(err) == ErrDone {
 					continue
 				}
 				if err != nil {
@@ -582,7 +583,7 @@ func (p *Pipeline) forgeSendServerProof(ctx context.Context, batchNum common.Bat
 	// remove transactions from the pool that have been there for too long
 	err := p.purgeRemoveByTimeout()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	batchInfo := BatchInfo{BatchNum: batchNum} // to accumulate metadata of the batch
@@ -598,13 +599,13 @@ func (p *Pipeline) forgeSendServerProof(ctx context.Context, batchNum common.Bat
 		var l1UserTxs []common.L1Tx = nil                                                                                    // tmp, depends on HistoryDB
 		l1UserTxsExtra, l1OperatorTxs, poolL2Txs, err = p.txSelector.GetL1L2TxSelection([]common.Idx{}, batchNum, l1UserTxs) // TODO once feesInfo is added to method return, add the var
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 	} else {
 		// 2b: only L2 txs
 		_, poolL2Txs, err = p.txSelector.GetL2TxSelection([]common.Idx{}, batchNum) // TODO once feesInfo is added to method return, add the var
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		l1UserTxsExtra = nil
 		l1OperatorTxs = nil
@@ -616,7 +617,7 @@ func (p *Pipeline) forgeSendServerProof(ctx context.Context, batchNum common.Bat
 	// all the nonces smaller than the current one)
 	err = p.purgeInvalidDueToL2TxsSelection(poolL2Txs)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	// 3.  Save metadata from TxSelector output for BatchNum
@@ -631,7 +632,7 @@ func (p *Pipeline) forgeSendServerProof(ctx context.Context, batchNum common.Bat
 	}
 	zkInputs, err := p.batchBuilder.BuildBatch([]common.Idx{}, configBatch, l1UserTxsExtra, l1OperatorTxs, poolL2Txs, nil) // TODO []common.TokenID --> feesInfo
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	// 5. Save metadata from BatchBuilder output for BatchNum
@@ -641,7 +642,7 @@ func (p *Pipeline) forgeSendServerProof(ctx context.Context, batchNum common.Bat
 	// 6. Wait for an available server proof blocking call
 	serverProof, err := p.serverProofPool.Get(ctx)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	batchInfo.ServerProof = serverProof
 	defer func() {
@@ -657,7 +658,7 @@ func (p *Pipeline) forgeSendServerProof(ctx context.Context, batchNum common.Bat
 	// save server proof info for batchNum
 	err = batchInfo.ServerProof.CalculateProof(zkInputs)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	return &batchInfo, nil
@@ -667,7 +668,7 @@ func (p *Pipeline) forgeSendServerProof(ctx context.Context, batchNum common.Bat
 func (p *Pipeline) waitServerProof(ctx context.Context, batchInfo *BatchInfo) error {
 	proof, err := batchInfo.ServerProof.GetProof(ctx) // blocking call, until not resolved don't continue. Returns when the proof server has calculated the proof
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	p.serverProofPool.Add(batchInfo.ServerProof)
 	batchInfo.ServerProof = nil

coordinator/proofpool.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // ServerProofInterface is the interface to a ServerProof that calculates zk proofs
@@ -30,13 +31,13 @@ func NewServerProof(URL string) *ServerProof {
 // Proof
 func (p *ServerProof) CalculateProof(zkInputs *common.ZKInputs) error {
 	log.Error("TODO")
-	return errTODO
+	return tracerr.Wrap(errTODO)
 }
 
 // GetProof retreives the Proof from the ServerProof
 func (p *ServerProof) GetProof(ctx context.Context) (*Proof, error) {
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // ServerProofMock is a mock ServerProof to be used in tests.  It doesn't calculate anything
@@ -56,7 +57,7 @@ func (p *ServerProofMock) GetProof(ctx context.Context) (*Proof, error) {
 	case <-time.After(200 * time.Millisecond): //nolint:gomnd
 		return &Proof{}, nil
 	case <-ctx.Done():
-		return nil, ErrDone
+		return nil, tracerr.Wrap(ErrDone)
 	}
 }
 
@@ -82,7 +83,7 @@ func (p *ServerProofPool) Get(ctx context.Context) (ServerProofInterface, error)
 	select {
 	case <-ctx.Done():
 		log.Info("ServerProofPool.Get done")
-		return nil, ErrDone
+		return nil, tracerr.Wrap(ErrDone)
 	case serverProof := <-p.pool:
 		return serverProof, nil
 	}

db/historydb/historydb.go

@@ -10,6 +10,7 @@ import (
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	"github.com/jmoiron/sqlx"
 
@@ -73,7 +74,7 @@ func (hdb *HistoryDB) GetBlock(blockNum int64) (*common.Block, error) {
 		hdb.db, block,
 		"SELECT * FROM block WHERE eth_block_num = $1;", blockNum,
 	)
-	return block, err
+	return block, tracerr.Wrap(err)
 }
 
 // GetAllBlocks retrieve all blocks from the DB
@@ -83,7 +84,7 @@ func (hdb *HistoryDB) GetAllBlocks() ([]common.Block, error) {
 		hdb.db, &blocks,
 		"SELECT * FROM block;",
 	)
-	return db.SlicePtrsToSlice(blocks).([]common.Block), err
+	return db.SlicePtrsToSlice(blocks).([]common.Block), tracerr.Wrap(err)
 }
 
 // GetBlocks retrieve blocks from the DB, given a range of block numbers defined by from and to
@@ -94,7 +95,7 @@ func (hdb *HistoryDB) GetBlocks(from, to int64) ([]common.Block, error) {
 		"SELECT * FROM block WHERE $1 <= eth_block_num AND eth_block_num < $2;",
 		from, to,
 	)
-	return db.SlicePtrsToSlice(blocks).([]common.Block), err
+	return db.SlicePtrsToSlice(blocks).([]common.Block), tracerr.Wrap(err)
 }
 
 // GetLastBlock retrieve the block with the highest block number from the DB
@@ -103,7 +104,7 @@ func (hdb *HistoryDB) GetLastBlock() (*common.Block, error) {
 	err := meddler.QueryRow(
 		hdb.db, block, "SELECT * FROM block ORDER BY eth_block_num DESC LIMIT 1;",
 	)
-	return block, err
+	return block, tracerr.Wrap(err)
 }
 
 // AddBatch insert a Batch into the DB
@@ -128,13 +129,13 @@ func (hdb *HistoryDB) addBatch(d meddler.DB, batch *common.Batch) error {
 			tokenIDs,
 		)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		query = hdb.db.Rebind(query)
 		if err := meddler.QueryAll(
 			hdb.db, &tokenPrices, query, args...,
 		); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 	// Calculate total collected
@@ -159,7 +160,7 @@ func (hdb *HistoryDB) AddBatches(batches []common.Batch) error {
 func (hdb *HistoryDB) addBatches(d meddler.DB, batches []common.Batch) error {
 	for i := 0; i < len(batches); i++ {
 		if err := hdb.addBatch(d, &batches[i]); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 	return nil
@@ -258,11 +259,11 @@ func (hdb *HistoryDB) GetBatchesAPI(
 	// log.Debug(query)
 	batchPtrs := []*BatchAPI{}
 	if err := meddler.QueryAll(hdb.db, &batchPtrs, query, args...); err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	batches := db.SlicePtrsToSlice(batchPtrs).([]BatchAPI)
 	if len(batches) == 0 {
-		return nil, 0, sql.ErrNoRows
+		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
 	}
 	return batches, batches[0].TotalItems - uint64(len(batches)), nil
 }
@@ -276,7 +277,7 @@ func (hdb *HistoryDB) GetAllBatches() ([]common.Batch, error) {
 		 batch.fee_idxs_coordinator, batch.state_root, batch.num_accounts, batch.last_idx, batch.exit_root,
 		 batch.forge_l1_txs_num, batch.slot_num, batch.total_fees_usd FROM batch;`,
 	)
-	return db.SlicePtrsToSlice(batches).([]common.Batch), err
+	return db.SlicePtrsToSlice(batches).([]common.Batch), tracerr.Wrap(err)
 }
 
 // GetBatches retrieve batches from the DB, given a range of batch numbers defined by from and to
@@ -287,7 +288,7 @@ func (hdb *HistoryDB) GetBatches(from, to common.BatchNum) ([]common.Batch, erro
 		"SELECT * FROM batch WHERE $1 <= batch_num AND batch_num < $2;",
 		from, to,
 	)
-	return db.SlicePtrsToSlice(batches).([]common.Batch), err
+	return db.SlicePtrsToSlice(batches).([]common.Batch), tracerr.Wrap(err)
 }
 
 // GetBatchesLen retrieve number of batches from the DB, given a slotNum
@@ -331,7 +332,7 @@ func (hdb *HistoryDB) Reorg(lastValidBlock int64) error {
 	} else {
 		_, err = hdb.db.Exec("DELETE FROM block WHERE eth_block_num > $1;", lastValidBlock)
 	}
-	return err
+	return tracerr.Wrap(err)
 }
 
 // AddBids insert Bids into the DB
@@ -352,7 +353,7 @@ func (hdb *HistoryDB) GetAllBids() ([]common.Bid, error) {
 		hdb.db, &bids,
 		`SELECT bid.slot_num, bid.bid_value, bid.eth_block_num, bid.bidder_addr FROM bid;`,
 	)
-	return db.SlicePtrsToSlice(bids).([]common.Bid), err
+	return db.SlicePtrsToSlice(bids).([]common.Bid), tracerr.Wrap(err)
 }
 
 // GetBestBidAPI returns the best bid in specific slot by slotNum
@@ -364,7 +365,7 @@ func (hdb *HistoryDB) GetBestBidAPI(slotNum *int64) (BidAPI, error) {
 		INNER JOIN coordinator ON bid.bidder_addr = coordinator.bidder_addr 
 		WHERE slot_num = $1 ORDER BY item_id DESC LIMIT 1;`, slotNum,
 	)
-	return *bid, err
+	return *bid, tracerr.Wrap(err)
 }
 
 // GetBestBidCoordinator returns the forger address of the highest bidder in a slot by slotNum
@@ -385,7 +386,7 @@ func (hdb *HistoryDB) GetBestBidCoordinator(slotNum int64) (*common.BidCoordinat
 		WHERE bid.slot_num = $1 ORDER BY bid.item_id DESC LIMIT 1;`,
 		slotNum)
 
-	return bidCoord, err
+	return bidCoord, tracerr.Wrap(err)
 }
 
 // GetBestBidsAPI returns the best bid in specific slot by slotNum
@@ -424,12 +425,12 @@ func (hdb *HistoryDB) GetBestBidsAPI(
 	query = hdb.db.Rebind(queryStr)
 	bidPtrs := []*BidAPI{}
 	if err := meddler.QueryAll(hdb.db, &bidPtrs, query, args...); err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	// log.Debug(query)
 	bids := db.SlicePtrsToSlice(bidPtrs).([]BidAPI)
 	if len(bids) == 0 {
-		return nil, 0, sql.ErrNoRows
+		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
 	}
 	return bids, bids[0].TotalItems - uint64(len(bids)), nil
 }
@@ -492,15 +493,15 @@ func (hdb *HistoryDB) GetBidsAPI(
 	queryStr += fmt.Sprintf("LIMIT %d;", *limit)
 	query, argsQ, err := sqlx.In(queryStr, args...)
 	if err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	query = hdb.db.Rebind(query)
 	bids := []*BidAPI{}
 	if err := meddler.QueryAll(hdb.db, &bids, query, argsQ...); err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	if len(bids) == 0 {
-		return nil, 0, sql.ErrNoRows
+		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
 	}
 	return db.SlicePtrsToSlice(bids).([]BidAPI), bids[0].TotalItems - uint64(len(bids)), nil
 }
@@ -592,7 +593,7 @@ func (hdb *HistoryDB) updateExitTree(d sqlx.Ext, blockNum int64,
 		`
 	if len(withdrawals) > 0 {
 		if _, err := sqlx.NamedQuery(d, query, withdrawals); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 
@@ -627,7 +628,7 @@ func (hdb *HistoryDB) UpdateTokenValue(tokenSymbol string, value float64) error
 		"UPDATE token SET usd = $1 WHERE symbol = $2;",
 		value, tokenSymbol,
 	)
-	return err
+	return tracerr.Wrap(err)
 }
 
 // GetToken returns a token from the DB given a TokenID
@@ -636,7 +637,7 @@ func (hdb *HistoryDB) GetToken(tokenID common.TokenID) (*TokenWithUSD, error) {
 	err := meddler.QueryRow(
 		hdb.db, token, `SELECT * FROM token WHERE token_id = $1;`, tokenID,
 	)
-	return token, err
+	return token, tracerr.Wrap(err)
 }
 
 // GetAllTokens returns all tokens from the DB
@@ -646,7 +647,7 @@ func (hdb *HistoryDB) GetAllTokens() ([]TokenWithUSD, error) {
 		hdb.db, &tokens,
 		"SELECT * FROM token ORDER BY token_id;",
 	)
-	return db.SlicePtrsToSlice(tokens).([]TokenWithUSD), err
+	return db.SlicePtrsToSlice(tokens).([]TokenWithUSD), tracerr.Wrap(err)
 }
 
 // GetTokens returns a list of tokens from the DB
@@ -707,15 +708,15 @@ func (hdb *HistoryDB) GetTokens(
 	queryStr += fmt.Sprintf("LIMIT %d;", *limit)
 	query, argsQ, err := sqlx.In(queryStr, args...)
 	if err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	query = hdb.db.Rebind(query)
 	tokens := []*TokenWithUSD{}
 	if err := meddler.QueryAll(hdb.db, &tokens, query, argsQ...); err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	if len(tokens) == 0 {
-		return nil, 0, sql.ErrNoRows
+		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
 	}
 	return db.SlicePtrsToSlice(tokens).([]TokenWithUSD), uint64(len(tokens)) - tokens[0].TotalItems, nil
 }
@@ -725,13 +726,13 @@ func (hdb *HistoryDB) GetTokenSymbols() ([]string, error) {
 	var tokenSymbols []string
 	rows, err := hdb.db.Query("SELECT symbol FROM token;")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	sym := new(string)
 	for rows.Next() {
 		err = rows.Scan(sym)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		tokenSymbols = append(tokenSymbols, *sym)
 	}
@@ -763,7 +764,7 @@ func (hdb *HistoryDB) GetAllAccounts() ([]common.Account, error) {
 		hdb.db, &accs,
 		"SELECT * FROM account ORDER BY idx;",
 	)
-	return db.SlicePtrsToSlice(accs).([]common.Account), err
+	return db.SlicePtrsToSlice(accs).([]common.Account), tracerr.Wrap(err)
 }
 
 // AddL1Txs inserts L1 txs to the DB. USD and LoadAmountUSD will be set automatically before storing the tx.
@@ -895,7 +896,7 @@ func (hdb *HistoryDB) GetHistoryTx(txID common.TxID) (*TxAPI, error) {
 		INNER JOIN block ON tx.eth_block_num = block.eth_block_num 
 		WHERE tx.id = $1;`, txID,
 	)
-	return tx, err
+	return tx, tracerr.Wrap(err)
 }
 
 // GetHistoryTxs returns a list of txs from the DB using the HistoryTx struct
@@ -906,7 +907,7 @@ func (hdb *HistoryDB) GetHistoryTxs(
 	fromItem, limit *uint, order string,
 ) ([]TxAPI, uint64, error) {
 	if ethAddr != nil && bjj != nil {
-		return nil, 0, errors.New("ethAddr and bjj are incompatible")
+		return nil, 0, tracerr.Wrap(errors.New("ethAddr and bjj are incompatible"))
 	}
 	var query string
 	var args []interface{}
@@ -1010,11 +1011,11 @@ func (hdb *HistoryDB) GetHistoryTxs(
 	// log.Debug(query)
 	txsPtrs := []*TxAPI{}
 	if err := meddler.QueryAll(hdb.db, &txsPtrs, query, args...); err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	txs := db.SlicePtrsToSlice(txsPtrs).([]TxAPI)
 	if len(txs) == 0 {
-		return nil, 0, sql.ErrNoRows
+		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
 	}
 	return txs, txs[0].TotalItems - uint64(len(txs)), nil
 }
@@ -1028,7 +1029,7 @@ func (hdb *HistoryDB) GetAllExits() ([]common.ExitInfo, error) {
 		exit_tree.balance, exit_tree.instant_withdrawn, exit_tree.delayed_withdraw_request,
 		exit_tree.delayed_withdrawn FROM exit_tree;`,
 	)
-	return db.SlicePtrsToSlice(exits).([]common.ExitInfo), err
+	return db.SlicePtrsToSlice(exits).([]common.ExitInfo), tracerr.Wrap(err)
 }
 
 // GetExitAPI returns a exit from the DB
@@ -1046,7 +1047,7 @@ func (hdb *HistoryDB) GetExitAPI(batchNum *uint, idx *common.Idx) (*ExitAPI, err
 		INNER JOIN token ON account.token_id = token.token_id 
 		WHERE exit_tree.batch_num = $1 AND exit_tree.account_idx = $2;`, batchNum, idx,
 	)
-	return exit, err
+	return exit, tracerr.Wrap(err)
 }
 
 // GetExitsAPI returns a list of exits from the DB and pagination info
@@ -1056,7 +1057,7 @@ func (hdb *HistoryDB) GetExitsAPI(
 	fromItem, limit *uint, order string,
 ) ([]ExitAPI, uint64, error) {
 	if ethAddr != nil && bjj != nil {
-		return nil, 0, errors.New("ethAddr and bjj are incompatible")
+		return nil, 0, tracerr.Wrap(errors.New("ethAddr and bjj are incompatible"))
 	}
 	var query string
 	var args []interface{}
@@ -1152,10 +1153,10 @@ func (hdb *HistoryDB) GetExitsAPI(
 	// log.Debug(query)
 	exits := []*ExitAPI{}
 	if err := meddler.QueryAll(hdb.db, &exits, query, args...); err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	if len(exits) == 0 {
-		return nil, 0, sql.ErrNoRows
+		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
 	}
 	return db.SlicePtrsToSlice(exits).([]ExitAPI), exits[0].TotalItems - uint64(len(exits)), nil
 }
@@ -1171,7 +1172,7 @@ func (hdb *HistoryDB) GetAllL1UserTxs() ([]common.L1Tx, error) {
 		tx.eth_block_num, tx.type, tx.batch_num
 		FROM tx WHERE is_l1 = TRUE AND user_origin = TRUE;`,
 	)
-	return db.SlicePtrsToSlice(txs).([]common.L1Tx), err
+	return db.SlicePtrsToSlice(txs).([]common.L1Tx), tracerr.Wrap(err)
 }
 
 // GetAllL1CoordinatorTxs returns all L1CoordinatorTxs from the DB
@@ -1185,7 +1186,7 @@ func (hdb *HistoryDB) GetAllL1CoordinatorTxs() ([]common.L1Tx, error) {
 		tx.eth_block_num, tx.type, tx.batch_num
 		FROM tx WHERE is_l1 = TRUE AND user_origin = FALSE;`,
 	)
-	return db.SlicePtrsToSlice(txs).([]common.L1Tx), err
+	return db.SlicePtrsToSlice(txs).([]common.L1Tx), tracerr.Wrap(err)
 }
 
 // GetAllL2Txs returns all L2Txs from the DB
@@ -1198,7 +1199,7 @@ func (hdb *HistoryDB) GetAllL2Txs() ([]common.L2Tx, error) {
 		tx.type, tx.eth_block_num
 		FROM tx WHERE is_l1 = FALSE;`,
 	)
-	return db.SlicePtrsToSlice(txs).([]common.L2Tx), err
+	return db.SlicePtrsToSlice(txs).([]common.L2Tx), tracerr.Wrap(err)
 }
 
 // GetL1UserTxs gets L1 User Txs to be forged in the L1Batch with toForgeL1TxsNum.
@@ -1213,7 +1214,7 @@ func (hdb *HistoryDB) GetL1UserTxs(toForgeL1TxsNum int64) ([]common.L1Tx, error)
 		FROM tx WHERE to_forge_l1_txs_num = $1 AND is_l1 = TRUE AND user_origin = TRUE;`,
 		toForgeL1TxsNum,
 	)
-	return db.SlicePtrsToSlice(txs).([]common.L1Tx), err
+	return db.SlicePtrsToSlice(txs).([]common.L1Tx), tracerr.Wrap(err)
 }
 
 // TODO: Think about chaning all the queries that return a last value, to queries that return the next valid value.
@@ -1233,15 +1234,15 @@ func (hdb *HistoryDB) GetSCVars() (*common.RollupVariables, *common.AuctionVaria
 	var wDelayer common.WDelayerVariables
 	if err := meddler.QueryRow(hdb.db, &rollup,
 		"SELECT * FROM rollup_vars ORDER BY eth_block_num DESC LIMIT 1;"); err != nil {
-		return nil, nil, nil, err
+		return nil, nil, nil, tracerr.Wrap(err)
 	}
 	if err := meddler.QueryRow(hdb.db, &auction,
 		"SELECT * FROM auction_vars ORDER BY eth_block_num DESC LIMIT 1;"); err != nil {
-		return nil, nil, nil, err
+		return nil, nil, nil, tracerr.Wrap(err)
 	}
 	if err := meddler.QueryRow(hdb.db, &wDelayer,
 		"SELECT * FROM wdelayer_vars ORDER BY eth_block_num DESC LIMIT 1;"); err != nil {
-		return nil, nil, nil, err
+		return nil, nil, nil, tracerr.Wrap(err)
 	}
 	return &rollup, &auction, &wDelayer, nil
 }
@@ -1266,7 +1267,7 @@ func (hdb *HistoryDB) SetInitialSCVars(rollup *common.RollupVariables,
 	auction *common.AuctionVariables, wDelayer *common.WDelayerVariables) error {
 	txn, err := hdb.db.Beginx()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	defer func() {
 		if err != nil {
@@ -1280,13 +1281,13 @@ func (hdb *HistoryDB) SetInitialSCVars(rollup *common.RollupVariables,
 	wDelayer.EthBlockNum = 0
 	auction.DefaultSlotSetBidSlotNum = 0
 	if err := hdb.setRollupVars(txn, rollup); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if err := hdb.setAuctionVars(txn, auction); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if err := hdb.setWDelayerVars(txn, wDelayer); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	return txn.Commit()
@@ -1299,7 +1300,7 @@ func (hdb *HistoryDB) SetInitialSCVars(rollup *common.RollupVariables,
 func (hdb *HistoryDB) AddBlockSCData(blockData *common.BlockData) (err error) {
 	txn, err := hdb.db.Beginx()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	defer func() {
 		if err != nil {
@@ -1309,27 +1310,27 @@ func (hdb *HistoryDB) AddBlockSCData(blockData *common.BlockData) (err error) {
 
 	// Add block
 	if err := hdb.addBlock(txn, &blockData.Block); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	// Add Coordinators
 	if len(blockData.Auction.Coordinators) > 0 {
 		if err := hdb.addCoordinators(txn, blockData.Auction.Coordinators); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 
 	// Add Bids
 	if len(blockData.Auction.Bids) > 0 {
 		if err := hdb.addBids(txn, blockData.Auction.Bids); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 
 	// Add Tokens
 	if len(blockData.Rollup.AddedTokens) > 0 {
 		if err := hdb.addTokens(txn, blockData.Rollup.AddedTokens); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 
@@ -1366,69 +1367,69 @@ func (hdb *HistoryDB) AddBlockSCData(blockData *common.BlockData) (err error) {
 		// Add Batch: this will trigger an update on the DB
 		// that will set the batch num of forged L1 txs in this batch
 		if err = hdb.addBatch(txn, &batch.Batch); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 
 		// Add accounts
 		if len(batch.CreatedAccounts) > 0 {
 			if err := hdb.addAccounts(txn, batch.CreatedAccounts); err != nil {
-				return err
+				return tracerr.Wrap(err)
 			}
 		}
 
 		// Add forged l1 coordinator Txs
 		if len(batch.L1CoordinatorTxs) > 0 {
 			if err := hdb.addL1Txs(txn, batch.L1CoordinatorTxs); err != nil {
-				return err
+				return tracerr.Wrap(err)
 			}
 		}
 
 		// Add l2 Txs
 		if len(batch.L2Txs) > 0 {
 			if err := hdb.addL2Txs(txn, batch.L2Txs); err != nil {
-				return err
+				return tracerr.Wrap(err)
 			}
 		}
 
 		// Add user L1 txs that will be forged in next batch
 		if userlL1s, ok := userL1s[batch.Batch.BatchNum]; ok {
 			if err := hdb.addL1Txs(txn, userlL1s); err != nil {
-				return err
+				return tracerr.Wrap(err)
 			}
 		}
 
 		// Add exit tree
 		if len(batch.ExitTree) > 0 {
 			if err := hdb.addExitTree(txn, batch.ExitTree); err != nil {
-				return err
+				return tracerr.Wrap(err)
 			}
 		}
 	}
 	// Add user L1 txs that won't be forged in this block
 	if userL1sNotForgedInThisBlock, ok := userL1s[0]; ok {
 		if err := hdb.addL1Txs(txn, userL1sNotForgedInThisBlock); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 	if blockData.Rollup.Vars != nil {
 		if err := hdb.setRollupVars(txn, blockData.Rollup.Vars); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 	if blockData.Auction.Vars != nil {
 		if err := hdb.setAuctionVars(txn, blockData.Auction.Vars); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 	if blockData.WDelayer.Vars != nil {
 		if err := hdb.setWDelayerVars(txn, blockData.WDelayer.Vars); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 
 	if err := hdb.updateExitTree(txn, blockData.Block.Num,
 		blockData.Rollup.Withdrawals, blockData.WDelayer.Withdrawals); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	return txn.Commit()
@@ -1438,7 +1439,7 @@ func (hdb *HistoryDB) AddBlockSCData(blockData *common.BlockData) (err error) {
 func (hdb *HistoryDB) GetCoordinatorAPI(bidderAddr ethCommon.Address) (*CoordinatorAPI, error) {
 	coordinator := &CoordinatorAPI{}
 	err := meddler.QueryRow(hdb.db, coordinator, "SELECT * FROM coordinator WHERE bidder_addr = $1;", bidderAddr)
-	return coordinator, err
+	return coordinator, tracerr.Wrap(err)
 }
 
 // GetCoordinatorsAPI returns a list of coordinators from the DB and pagination info
@@ -1470,10 +1471,10 @@ func (hdb *HistoryDB) GetCoordinatorsAPI(fromItem, limit *uint, order string) ([
 
 	coordinators := []*CoordinatorAPI{}
 	if err := meddler.QueryAll(hdb.db, &coordinators, query, args...); err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	if len(coordinators) == 0 {
-		return nil, 0, sql.ErrNoRows
+		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
 	}
 	return db.SlicePtrsToSlice(coordinators).([]CoordinatorAPI),
 		coordinators[0].TotalItems - uint64(len(coordinators)), nil
@@ -1490,7 +1491,7 @@ func (hdb *HistoryDB) GetAuctionVars() (*common.AuctionVariables, error) {
 	err := meddler.QueryRow(
 		hdb.db, auctionVars, `SELECT * FROM auction_vars;`,
 	)
-	return auctionVars, err
+	return auctionVars, tracerr.Wrap(err)
 }
 
 // GetAccountAPI returns an account by its index
@@ -1503,7 +1504,7 @@ func (hdb *HistoryDB) GetAccountAPI(idx common.Idx) (*AccountAPI, error) {
 	FROM account INNER JOIN token ON account.token_id = token.token_id WHERE idx = $1;`, idx)
 
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	return account, nil
@@ -1515,7 +1516,7 @@ func (hdb *HistoryDB) GetAccountsAPI(
 	bjj *babyjub.PublicKey, fromItem, limit *uint, order string,
 ) ([]AccountAPI, uint64, error) {
 	if ethAddr != nil && bjj != nil {
-		return nil, 0, errors.New("ethAddr and bjj are incompatible")
+		return nil, 0, tracerr.Wrap(errors.New("ethAddr and bjj are incompatible"))
 	}
 	var query string
 	var args []interface{}
@@ -1570,16 +1571,16 @@ func (hdb *HistoryDB) GetAccountsAPI(
 	queryStr += fmt.Sprintf("LIMIT %d;", *limit)
 	query, argsQ, err := sqlx.In(queryStr, args...)
 	if err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	query = hdb.db.Rebind(query)
 
 	accounts := []*AccountAPI{}
 	if err := meddler.QueryAll(hdb.db, &accounts, query, argsQ...); err != nil {
-		return nil, 0, err
+		return nil, 0, tracerr.Wrap(err)
 	}
 	if len(accounts) == 0 {
-		return nil, 0, sql.ErrNoRows
+		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
 	}
 
 	return db.SlicePtrsToSlice(accounts).([]AccountAPI),
@@ -1595,7 +1596,7 @@ func (hdb *HistoryDB) GetMetrics(lastBatchNum common.BatchNum) (*Metrics, error)
 		FROM tx INNER JOIN block ON tx.eth_block_num = block.eth_block_num
 		WHERE block.timestamp >= NOW() - INTERVAL '24 HOURS';`)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	metrics.TransactionsPerSecond = float64(metricsTotals.TotalTransactions / (24 * 60 * 60))
@@ -1611,7 +1612,7 @@ func (hdb *HistoryDB) GetMetrics(lastBatchNum common.BatchNum) (*Metrics, error)
 		SUM(total_fees_usd) AS total_fees FROM batch 
 		WHERE batch_num > $1;`, metricsTotals.FirstBatchNum)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	if metricsTotals.TotalBatches > 0 {
 		metrics.BatchFrequency = float64((24 * 60 * 60) / metricsTotals.TotalBatches)
@@ -1627,7 +1628,7 @@ func (hdb *HistoryDB) GetMetrics(lastBatchNum common.BatchNum) (*Metrics, error)
 		hdb.db, metrics,
 		`SELECT COUNT(*) AS total_bjjs, COUNT(DISTINCT(bjj)) AS total_accounts FROM account;`)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	return metrics, nil
@@ -1641,14 +1642,14 @@ func (hdb *HistoryDB) GetAvgTxFee() (float64, error) {
 		FROM tx INNER JOIN block ON tx.eth_block_num = block.eth_block_num
 		WHERE block.timestamp >= NOW() - INTERVAL '1 HOURS';`)
 	if err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	err = meddler.QueryRow(
 		hdb.db, metricsTotals, `SELECT COUNT(*) AS total_batches, 
 		SUM(total_fees_usd) AS total_fees FROM batch 
 		WHERE batch_num > $1;`, metricsTotals.FirstBatchNum)
 	if err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 
 	var avgTransactionFee float64

db/historydb/historydb_test.go

@@ -14,6 +14,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/log"
 	"github.com/hermeznetwork/hermez-node/test"
 	"github.com/hermeznetwork/hermez-node/test/til"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -78,7 +79,7 @@ func TestBlocks(t *testing.T) {
 	}
 	// Add block 0 to the generated blocks
 	blocks = append(
-		[]common.BlockData{common.BlockData{Block: test.Block0}}, //nolint:gofmt
+		[]common.BlockData{{Block: test.Block0}}, //nolint:gofmt
 		blocks...,
 	)
 	// Get all blocks from DB
@@ -680,7 +681,7 @@ func exampleInitSCVars() (*common.RollupVariables, *common.AuctionVariables, *co
 func TestSetInitialSCVars(t *testing.T) {
 	test.WipeDB(historyDB.DB())
 	_, _, _, err := historyDB.GetSCVars()
-	assert.Equal(t, sql.ErrNoRows, err)
+	assert.Equal(t, sql.ErrNoRows, tracerr.Unwrap(err))
 	rollup, auction, wDelayer := exampleInitSCVars()
 	err = historyDB.SetInitialSCVars(rollup, auction, wDelayer)
 	require.Nil(t, err)
@@ -859,7 +860,7 @@ func TestGetBestBidCoordinator(t *testing.T) {
 	require.Equal(t, coords[1].URL, forger10.URL)
 
 	_, err = historyDB.GetBestBidCoordinator(11)
-	require.Equal(t, sql.ErrNoRows, err)
+	require.Equal(t, sql.ErrNoRows, tracerr.Unwrap(err))
 }
 
 // setTestBlocks WARNING: this will delete the blocks and recreate them

db/l2db/l2db.go

@@ -7,6 +7,7 @@ import (
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/jmoiron/sqlx"
 
 	//nolint:errcheck // driver for postgres DB
@@ -51,7 +52,7 @@ func (l2db *L2DB) AddAccountCreationAuth(auth *common.AccountCreationAuth) error
 		VALUES ($1, $2, $3);`,
 		auth.EthAddr, auth.BJJ, auth.Signature,
 	)
-	return err
+	return tracerr.Wrap(err)
 }
 
 // GetAccountCreationAuth returns an account creation authorization from the DB
@@ -170,7 +171,7 @@ func (l2db *L2DB) GetPendingTxs() ([]common.PoolL2Tx, error) {
 		selectPoolTxCommon+"WHERE state = $1",
 		common.PoolL2TxStatePending,
 	)
-	return db.SlicePtrsToSlice(txs).([]common.PoolL2Tx), err
+	return db.SlicePtrsToSlice(txs).([]common.PoolL2Tx), tracerr.Wrap(err)
 }
 
 // StartForging updates the state of the transactions that will begin the forging process.
@@ -186,11 +187,11 @@ func (l2db *L2DB) StartForging(txIDs []common.TxID, batchNum common.BatchNum) er
 		txIDs,
 	)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	query = l2db.db.Rebind(query)
 	_, err = l2db.db.Exec(query, args...)
-	return err
+	return tracerr.Wrap(err)
 }
 
 // DoneForging updates the state of the transactions that have been forged
@@ -206,11 +207,11 @@ func (l2db *L2DB) DoneForging(txIDs []common.TxID, batchNum common.BatchNum) err
 		txIDs,
 	)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	query = l2db.db.Rebind(query)
 	_, err = l2db.db.Exec(query, args...)
-	return err
+	return tracerr.Wrap(err)
 }
 
 // InvalidateTxs updates the state of the transactions that are invalid.
@@ -225,11 +226,11 @@ func (l2db *L2DB) InvalidateTxs(txIDs []common.TxID, batchNum common.BatchNum) e
 		txIDs,
 	)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	query = l2db.db.Rebind(query)
 	_, err = l2db.db.Exec(query, args...)
-	return err
+	return tracerr.Wrap(err)
 }
 
 // CheckNonces invalidate txs with nonces that are smaller or equal than their respective accounts nonces.
@@ -237,7 +238,7 @@ func (l2db *L2DB) InvalidateTxs(txIDs []common.TxID, batchNum common.BatchNum) e
 func (l2db *L2DB) CheckNonces(updatedAccounts []common.Account, batchNum common.BatchNum) (err error) {
 	txn, err := l2db.db.Beginx()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	defer func() {
 		// Rollback the transaction if there was an error.
@@ -257,7 +258,7 @@ func (l2db *L2DB) CheckNonces(updatedAccounts []common.Account, batchNum common.
 			updatedAccounts[i].Nonce,
 		)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 	return txn.Commit()
@@ -274,7 +275,7 @@ func (l2db *L2DB) Reorg(lastValidBatch common.BatchNum) error {
 		common.PoolL2TxStateInvalid,
 		lastValidBatch,
 	)
-	return err
+	return tracerr.Wrap(err)
 }
 
 // Purge deletes transactions that have been forged or marked as invalid for longer than the safety period
@@ -282,7 +283,7 @@ func (l2db *L2DB) Reorg(lastValidBatch common.BatchNum) error {
 func (l2db *L2DB) Purge(currentBatchNum common.BatchNum) (err error) {
 	txn, err := l2db.db.Beginx()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	defer func() {
 		// Rollback the transaction if there was an error.
@@ -298,7 +299,7 @@ func (l2db *L2DB) Purge(currentBatchNum common.BatchNum) (err error) {
 		time.Unix(now-int64(l2db.ttl.Seconds()), 0),
 	)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// Delete txs that have been marked as forged / invalid after the safety period
 	_, err = txn.Exec(
@@ -309,7 +310,7 @@ func (l2db *L2DB) Purge(currentBatchNum common.BatchNum) (err error) {
 		common.PoolL2TxStateInvalid,
 	)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	return txn.Commit()
 }

db/l2db/l2db_test.go

@@ -14,6 +14,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/log"
 	"github.com/hermeznetwork/hermez-node/test"
 	"github.com/hermeznetwork/hermez-node/test/til"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -69,12 +70,12 @@ func prepareHistoryDB(historyDB *historydb.HistoryDB) error {
 	}
 	blocks, err := tc.GenerateBlocks(setBlockchain)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	err = tc.FillBlocksExtra(blocks, &tilCfgExtra)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	tokens = make(map[common.TokenID]historydb.TokenWithUSD)
 	tokensValue = make(map[common.TokenID]float64)
@@ -85,7 +86,7 @@ func prepareHistoryDB(historyDB *historydb.HistoryDB) error {
 	for i := range blocks[:len(blocks)-1] {
 		err = historyDB.AddBlockSCData(&blocks[i])
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		for _, batch := range blocks[i].Rollup.Batches {
 			for _, account := range batch.CreatedAccounts {
@@ -110,7 +111,7 @@ func prepareHistoryDB(historyDB *historydb.HistoryDB) error {
 		tokenSymbol := ""
 		err := historyDB.UpdateTokenValue(tokenSymbol, value)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 	return nil
@@ -135,7 +136,7 @@ func generatePoolL2Txs() ([]common.PoolL2Tx, error) {
 		`
 	poolL2Txs, err := tc.GeneratePoolL2Txs(setPool)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return poolL2Txs, nil
 }

db/statedb/statedb.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-merkletree"
 	"github.com/iden3/go-merkletree/db"
 	"github.com/iden3/go-merkletree/db/pebble"
@@ -92,18 +93,18 @@ func NewStateDB(path string, typ TypeStateDB, nLevels int) (*StateDB, error) {
 	var err error
 	sto, err = pebble.NewPebbleStorage(path+PathCurrent, false)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	var mt *merkletree.MerkleTree = nil
 	if typ == TypeSynchronizer || typ == TypeBatchBuilder {
 		mt, err = merkletree.NewMerkleTree(sto.WithPrefix(PrefixKeyMT), nLevels)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 	}
 	if typ == TypeTxSelector && nLevels != 0 {
-		return nil, fmt.Errorf("invalid StateDB parameters: StateDB type==TypeStateDB can not have nLevels!=0")
+		return nil, tracerr.Wrap(fmt.Errorf("invalid StateDB parameters: StateDB type==TypeStateDB can not have nLevels!=0"))
 	}
 
 	sdb := &StateDB{
@@ -116,13 +117,13 @@ func NewStateDB(path string, typ TypeStateDB, nLevels int) (*StateDB, error) {
 	// load currentBatch
 	sdb.currentBatch, err = sdb.GetCurrentBatch()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	// make reset (get checkpoint) at currentBatch
 	err = sdb.reset(sdb.currentBatch, false)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	return sdb, nil
@@ -136,11 +137,11 @@ func (s *StateDB) DB() *pebble.PebbleStorage {
 // GetCurrentBatch returns the current BatchNum stored in the StateDB
 func (s *StateDB) GetCurrentBatch() (common.BatchNum, error) {
 	cbBytes, err := s.db.Get(KeyCurrentBatch)
-	if err == db.ErrNotFound {
+	if tracerr.Unwrap(err) == db.ErrNotFound {
 		return 0, nil
 	}
 	if err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	return common.BatchNumFromBytes(cbBytes)
 }
@@ -149,14 +150,14 @@ func (s *StateDB) GetCurrentBatch() (common.BatchNum, error) {
 func (s *StateDB) setCurrentBatch() error {
 	tx, err := s.db.NewTx()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	err = tx.Put(KeyCurrentBatch, s.currentBatch.Bytes())
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if err := tx.Commit(); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	return nil
 }
@@ -171,23 +172,23 @@ func (s *StateDB) MakeCheckpoint() error {
 
 	err := s.setCurrentBatch()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	// if checkpoint BatchNum already exist in disk, delete it
 	if _, err := os.Stat(checkpointPath); !os.IsNotExist(err) {
 		err := os.RemoveAll(checkpointPath)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	} else if err != nil && !os.IsNotExist(err) {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	// execute Checkpoint
 	err = s.db.Pebble().Checkpoint(checkpointPath)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	return nil
@@ -198,7 +199,7 @@ func (s *StateDB) DeleteCheckpoint(batchNum common.BatchNum) error {
 	checkpointPath := s.path + PathBatchNum + strconv.Itoa(int(batchNum))
 
 	if _, err := os.Stat(checkpointPath); os.IsNotExist(err) {
-		return fmt.Errorf("Checkpoint with batchNum %d does not exist in DB", batchNum)
+		return tracerr.Wrap(fmt.Errorf("Checkpoint with batchNum %d does not exist in DB", batchNum))
 	}
 
 	return os.RemoveAll(checkpointPath)
@@ -209,15 +210,15 @@ func pebbleMakeCheckpoint(source, dest string) error {
 	if _, err := os.Stat(dest); !os.IsNotExist(err) {
 		err := os.RemoveAll(dest)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	} else if err != nil && !os.IsNotExist(err) {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	sto, err := pebble.NewPebbleStorage(source, false)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	defer func() {
 		errClose := sto.Pebble().Close()
@@ -229,7 +230,7 @@ func pebbleMakeCheckpoint(source, dest string) error {
 	// execute Checkpoint
 	err = sto.Pebble().Checkpoint(dest)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	return nil
@@ -253,19 +254,19 @@ func (s *StateDB) reset(batchNum common.BatchNum, closeCurrent bool) error {
 
 	if closeCurrent {
 		if err := s.db.Pebble().Close(); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 	// remove 'current'
 	err := os.RemoveAll(currentPath)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if batchNum == 0 {
 		// if batchNum == 0, open the new fresh 'current'
 		sto, err := pebble.NewPebbleStorage(currentPath, false)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		s.db = sto
 		s.idx = 255
@@ -275,7 +276,7 @@ func (s *StateDB) reset(batchNum common.BatchNum, closeCurrent bool) error {
 			// open the MT for the current s.db
 			mt, err := merkletree.NewMerkleTree(s.db.WithPrefix(PrefixKeyMT), s.mt.MaxLevels())
 			if err != nil {
-				return err
+				return tracerr.Wrap(err)
 			}
 			s.mt = mt
 		}
@@ -286,32 +287,32 @@ func (s *StateDB) reset(batchNum common.BatchNum, closeCurrent bool) error {
 	// copy 'BatchNumX' to 'current'
 	err = pebbleMakeCheckpoint(checkpointPath, currentPath)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	// open the new 'current'
 	sto, err := pebble.NewPebbleStorage(currentPath, false)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	s.db = sto
 
 	// get currentBatch num
 	s.currentBatch, err = s.GetCurrentBatch()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// idx is obtained from the statedb reset
 	s.idx, err = s.getIdx()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	if s.mt != nil {
 		// open the MT for the current s.db
 		mt, err := merkletree.NewMerkleTree(s.db.WithPrefix(PrefixKeyMT), s.mt.MaxLevels())
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		s.mt = mt
 	}
@@ -335,18 +336,18 @@ func (s *StateDB) GetAccounts() ([]common.Account, error) {
 	if err := idxDB.Iterate(func(k []byte, v []byte) (bool, error) {
 		idx, err := common.IdxFromBytes(k)
 		if err != nil {
-			return false, err
+			return false, tracerr.Wrap(err)
 		}
 		idxs = append(idxs, idx)
 		return true, nil
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	accs := []common.Account{}
 	for i := range idxs {
 		acc, err := s.GetAccount(idxs[i])
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		accs = append(accs, *acc)
 	}
@@ -358,21 +359,21 @@ func (s *StateDB) GetAccounts() ([]common.Account, error) {
 func getAccountInTreeDB(sto db.Storage, idx common.Idx) (*common.Account, error) {
 	idxBytes, err := idx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	vBytes, err := sto.Get(append(PrefixKeyIdx, idxBytes[:]...))
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	accBytes, err := sto.Get(append(PrefixKeyAccHash, vBytes...))
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	var b [32 * common.NLeafElems]byte
 	copy(b[:], accBytes)
 	account, err := common.AccountFromBytes(b)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	account.Idx = idx
 	return account, nil
@@ -384,11 +385,11 @@ func getAccountInTreeDB(sto db.Storage, idx common.Idx) (*common.Account, error)
 func (s *StateDB) CreateAccount(idx common.Idx, account *common.Account) (*merkletree.CircomProcessorProof, error) {
 	cpp, err := createAccountInTreeDB(s.db, s.mt, idx, account)
 	if err != nil {
-		return cpp, err
+		return cpp, tracerr.Wrap(err)
 	}
 	// store idx by EthAddr & BJJ
 	err = s.setIdxByEthAddrBJJ(idx, account.EthAddr, account.PublicKey, account.TokenID)
-	return cpp, err
+	return cpp, tracerr.Wrap(err)
 }
 
 // createAccountInTreeDB is abstracted from StateDB to be used from StateDB and
@@ -399,39 +400,39 @@ func createAccountInTreeDB(sto db.Storage, mt *merkletree.MerkleTree, idx common
 	// store at the DB the key: v, and value: leaf.Bytes()
 	v, err := account.HashValue()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	accountBytes, err := account.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	// store the Leaf value
 	tx, err := sto.NewTx()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	idxBytes, err := idx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	_, err = tx.Get(append(PrefixKeyIdx, idxBytes[:]...))
-	if err != db.ErrNotFound {
+	if tracerr.Unwrap(err) != db.ErrNotFound {
-		return nil, ErrAccountAlreadyExists
+		return nil, tracerr.Wrap(ErrAccountAlreadyExists)
 	}
 
 	err = tx.Put(append(PrefixKeyAccHash, v.Bytes()...), accountBytes[:])
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	err = tx.Put(append(PrefixKeyIdx, idxBytes[:]...), v.Bytes())
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	if err := tx.Commit(); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	if mt != nil {
@@ -456,32 +457,32 @@ func updateAccountInTreeDB(sto db.Storage, mt *merkletree.MerkleTree, idx common
 	// store at the DB the key: v, and value: account.Bytes()
 	v, err := account.HashValue()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	accountBytes, err := account.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	tx, err := sto.NewTx()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	err = tx.Put(append(PrefixKeyAccHash, v.Bytes()...), accountBytes[:])
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	idxBytes, err := idx.Bytes()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	err = tx.Put(append(PrefixKeyIdx, idxBytes[:]...), v.Bytes())
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	if err := tx.Commit(); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	if mt != nil {
@@ -493,7 +494,7 @@ func updateAccountInTreeDB(sto db.Storage, mt *merkletree.MerkleTree, idx common
 // MTGetProof returns the CircomVerifierProof for a given Idx
 func (s *StateDB) MTGetProof(idx common.Idx) (*merkletree.CircomVerifierProof, error) {
 	if s.mt == nil {
-		return nil, ErrStateDBWithoutMT
+		return nil, tracerr.Wrap(ErrStateDBWithoutMT)
 	}
 	return s.mt.GenerateCircomVerifierProof(idx.BigInt(), s.mt.Root())
 }
@@ -516,7 +517,7 @@ type LocalStateDB struct {
 func NewLocalStateDB(path string, synchronizerDB *StateDB, typ TypeStateDB, nLevels int) (*LocalStateDB, error) {
 	s, err := NewStateDB(path, typ, nLevels)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &LocalStateDB{
 		s,
@@ -540,44 +541,44 @@ func (l *LocalStateDB) Reset(batchNum common.BatchNum, fromSynchronizer bool) er
 		// use checkpoint from SynchronizerStateDB
 		if _, err := os.Stat(synchronizerCheckpointPath); os.IsNotExist(err) {
 			// if synchronizerStateDB does not have checkpoint at batchNum, return err
-			return fmt.Errorf("Checkpoint not exist in Synchronizer")
+			return tracerr.Wrap(fmt.Errorf("Checkpoint not exist in Synchronizer"))
 		}
 
 		if err := l.db.Pebble().Close(); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		// remove 'current'
 		err := os.RemoveAll(currentPath)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		// copy synchronizer'BatchNumX' to 'current'
 		err = pebbleMakeCheckpoint(synchronizerCheckpointPath, currentPath)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		// copy synchronizer'BatchNumX' to 'BatchNumX'
 		err = pebbleMakeCheckpoint(synchronizerCheckpointPath, checkpointPath)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 
 		// open the new 'current'
 		sto, err := pebble.NewPebbleStorage(currentPath, false)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		l.db = sto
 
 		// get currentBatch num
 		l.currentBatch, err = l.GetCurrentBatch()
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		// open the MT for the current s.db
 		mt, err := merkletree.NewMerkleTree(l.db.WithPrefix(PrefixKeyMT), l.mt.MaxLevels())
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		l.mt = mt
 

db/statedb/statedb_test.go

@@ -12,6 +12,7 @@ import (
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	ethCrypto "github.com/ethereum/go-ethereum/crypto"
 	"github.com/hermeznetwork/hermez-node/common"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	"github.com/iden3/go-merkletree/db"
 	"github.com/stretchr/testify/assert"
@@ -69,7 +70,7 @@ func TestNewStateDBIntermediateState(t *testing.T) {
 	assert.Nil(t, err)
 	v, err = sdb.db.Get(k0)
 	assert.NotNil(t, err)
-	assert.Equal(t, db.ErrNotFound, err)
+	assert.Equal(t, db.ErrNotFound, tracerr.Unwrap(err))
 	assert.Nil(t, v)
 
 	// store the same data from the beginning that has ben lost since last NewStateDB
@@ -116,7 +117,7 @@ func TestNewStateDBIntermediateState(t *testing.T) {
 
 	v, err = sdb.db.Get(k1)
 	assert.NotNil(t, err)
-	assert.Equal(t, db.ErrNotFound, err)
+	assert.Equal(t, db.ErrNotFound, tracerr.Unwrap(err))
 	assert.Nil(t, v)
 }
 
@@ -138,7 +139,7 @@ func TestStateDBWithoutMT(t *testing.T) {
 	unexistingAccount := common.Idx(1)
 	_, err = sdb.GetAccount(unexistingAccount)
 	assert.NotNil(t, err)
-	assert.Equal(t, db.ErrNotFound, err)
+	assert.Equal(t, db.ErrNotFound, tracerr.Unwrap(err))
 
 	// add test accounts
 	for i := 0; i < len(accounts); i++ {
@@ -159,7 +160,7 @@ func TestStateDBWithoutMT(t *testing.T) {
 	assert.Nil(t, err)
 	_, err = sdb.CreateAccount(common.Idx(256), accounts[1]) // check that can not be created twice
 	assert.NotNil(t, err)
-	assert.Equal(t, ErrAccountAlreadyExists, err)
+	assert.Equal(t, ErrAccountAlreadyExists, tracerr.Unwrap(err))
 
 	// update accounts
 	for i := 0; i < len(accounts); i++ {
@@ -171,7 +172,7 @@ func TestStateDBWithoutMT(t *testing.T) {
 
 	_, err = sdb.MTGetProof(common.Idx(1))
 	assert.NotNil(t, err)
-	assert.Equal(t, ErrStateDBWithoutMT, err)
+	assert.Equal(t, ErrStateDBWithoutMT, tracerr.Unwrap(err))
 }
 
 func TestStateDBWithMT(t *testing.T) {
@@ -191,7 +192,7 @@ func TestStateDBWithMT(t *testing.T) {
 	// get non-existing account, expecting an error
 	_, err = sdb.GetAccount(common.Idx(1))
 	assert.NotNil(t, err)
-	assert.Equal(t, db.ErrNotFound, err)
+	assert.Equal(t, db.ErrNotFound, tracerr.Unwrap(err))
 
 	// add test accounts
 	for i := 0; i < len(accounts); i++ {
@@ -210,7 +211,7 @@ func TestStateDBWithMT(t *testing.T) {
 	assert.Nil(t, err)
 	_, err = sdb.CreateAccount(common.Idx(256), accounts[1]) // check that can not be created twice
 	assert.NotNil(t, err)
-	assert.Equal(t, ErrAccountAlreadyExists, err)
+	assert.Equal(t, ErrAccountAlreadyExists, tracerr.Unwrap(err))
 
 	_, err = sdb.MTGetProof(common.Idx(256))
 	assert.Nil(t, err)

db/statedb/txprocessors.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	"github.com/iden3/go-merkletree"
 	"github.com/iden3/go-merkletree/db"
@@ -70,12 +71,12 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 	var createdAccounts []common.Account
 
 	if s.zki != nil {
-		return nil, errors.New("Expected StateDB.zki==nil, something went wrong and it's not empty")
+		return nil, tracerr.Wrap(errors.New("Expected StateDB.zki==nil, something went wrong and it's not empty"))
 	}
 	defer s.resetZKInputs()
 
 	if len(coordIdxs) >= int(ptc.MaxFeeTx) {
-		return nil, fmt.Errorf("CoordIdxs (%d) length must be smaller than MaxFeeTx (%d)", len(coordIdxs), ptc.MaxFeeTx)
+		return nil, tracerr.Wrap(fmt.Errorf("CoordIdxs (%d) length must be smaller than MaxFeeTx (%d)", len(coordIdxs), ptc.MaxFeeTx))
 	}
 
 	s.accumulatedFees = make(map[common.Idx]*big.Int)
@@ -104,7 +105,7 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 	if s.typ == TypeSynchronizer || s.typ == TypeBatchBuilder {
 		tmpDir, err := ioutil.TempDir("", "hermez-statedb-exittree")
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		defer func() {
 			if err := os.RemoveAll(tmpDir); err != nil {
@@ -113,11 +114,11 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 		}()
 		sto, err := pebble.NewPebbleStorage(tmpDir, false)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		exitTree, err = merkletree.NewMerkleTree(sto, s.mt.MaxLevels())
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 	}
 
@@ -126,7 +127,7 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 		// assumption: l1usertx are sorted by L1Tx.Position
 		exitIdx, exitAccount, newExit, createdAccount, err := s.processL1Tx(exitTree, &l1usertxs[i])
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		if s.typ == TypeSynchronizer && createdAccount != nil {
 			createdAccounts = append(createdAccounts, *createdAccount)
@@ -135,13 +136,13 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 		if s.zki != nil {
 			l1TxData, err := l1usertxs[i].BytesGeneric()
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			s.zki.Metadata.L1TxsData = append(s.zki.Metadata.L1TxsData, l1TxData)
 
 			l1TxDataAvailability, err := l1usertxs[i].BytesDataAvailability(s.zki.Metadata.NLevels)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			s.zki.Metadata.L1TxsDataAvailability = append(s.zki.Metadata.L1TxsDataAvailability, l1TxDataAvailability)
 
@@ -167,7 +168,7 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 	for i := 0; i < len(l1coordinatortxs); i++ {
 		exitIdx, _, _, createdAccount, err := s.processL1Tx(exitTree, &l1coordinatortxs[i])
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		if exitIdx != nil {
 			log.Error("Unexpected Exit in L1CoordinatorTx")
@@ -178,7 +179,7 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 		if s.zki != nil {
 			l1TxData, err := l1coordinatortxs[i].BytesGeneric()
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			s.zki.Metadata.L1TxsData = append(s.zki.Metadata.L1TxsData, l1TxData)
 
@@ -200,7 +201,7 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 	// created in the current batch, at this point the Idx will be created
 	coordIdxsMap, err := s.getTokenIDsFromIdxs(coordIdxs)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	// collectedFees will contain the amount of fee collected for each
 	// TokenID
@@ -217,7 +218,7 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 		feePlanTokens, err := s.getFeePlanTokens(coordIdxs, l2txs)
 		if err != nil {
 			log.Error(err)
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		copy(s.zki.FeePlanTokens, feePlanTokens)
 	}
@@ -226,12 +227,12 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 	for i := 0; i < len(l2txs); i++ {
 		exitIdx, exitAccount, newExit, err := s.processL2Tx(coordIdxsMap, collectedFees, exitTree, &l2txs[i])
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		if s.zki != nil {
 			l2TxData, err := l2txs[i].L2Tx().BytesDataAvailability(s.zki.Metadata.NLevels)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			s.zki.Metadata.L2TxsData = append(s.zki.Metadata.L2TxsData, l2TxData)
 
@@ -271,13 +272,13 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 		accCoord, err := s.GetAccount(idx)
 		if err != nil {
 			log.Errorw("Can not distribute accumulated fees to coordinator account: No coord Idx to receive fee", "idx", idx)
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		accCoord.Balance = new(big.Int).Add(accCoord.Balance, accumulatedFee)
 		pFee, err := s.UpdateAccount(idx, accCoord)
 		if err != nil {
 			log.Error(err)
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		if s.zki != nil {
 			s.zki.TokenID3[iFee] = accCoord.TokenID.BigInt()
@@ -315,7 +316,7 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 		// 0. generate MerkleProof
 		p, err := exitTree.GenerateCircomVerifierProof(exitIdx.BigInt(), nil)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		// 1. generate common.ExitInfo
 		ei := common.ExitInfo{
@@ -389,7 +390,7 @@ func (s *StateDB) getFeePlanTokens(coordIdxs []common.Idx, l2txs []common.PoolL2
 		acc, err := s.GetAccount(coordIdxs[i])
 		if err != nil {
 			log.Errorf("could not get account to determine TokenID of CoordIdx %d not found: %s", coordIdxs[i], err.Error())
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		coordTokenIDs[acc.TokenID] = true
 	}
@@ -401,7 +402,7 @@ func (s *StateDB) getFeePlanTokens(coordIdxs []common.Idx, l2txs []common.PoolL2
 		acc, err := s.GetAccount(l2txs[i].FromIdx)
 		if err != nil {
 			log.Errorf("could not get account to determine TokenID of L2Tx: FromIdx %d not found: %s", l2txs[i].FromIdx, err.Error())
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		if _, ok := coordTokenIDs[acc.TokenID]; ok {
 			tokenIDs[acc.TokenID] = true
@@ -429,7 +430,7 @@ func (s *StateDB) processL1Tx(exitTree *merkletree.MerkleTree, tx *common.L1Tx)
 		s.zki.TxCompressedData[s.i], err = tx.TxCompressedData()
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, nil, err
+			return nil, nil, false, nil, tracerr.Wrap(err)
 		}
 		s.zki.FromIdx[s.i] = tx.FromIdx.BigInt()
 		s.zki.ToIdx[s.i] = tx.ToIdx.BigInt()
@@ -460,7 +461,7 @@ func (s *StateDB) processL1Tx(exitTree *merkletree.MerkleTree, tx *common.L1Tx)
 		err := s.applyTransfer(nil, nil, tx.Tx(), 0)
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, nil, err
+			return nil, nil, false, nil, tracerr.Wrap(err)
 		}
 	case common.TxTypeCreateAccountDeposit:
 		s.computeEffectiveAmounts(tx)
@@ -469,7 +470,7 @@ func (s *StateDB) processL1Tx(exitTree *merkletree.MerkleTree, tx *common.L1Tx)
 		err := s.applyCreateAccount(tx)
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, nil, err
+			return nil, nil, false, nil, tracerr.Wrap(err)
 		}
 		// TODO applyCreateAccount will return the created account,
 		// which in the case type==TypeSynchronizer will be added to an
@@ -481,7 +482,7 @@ func (s *StateDB) processL1Tx(exitTree *merkletree.MerkleTree, tx *common.L1Tx)
 		err := s.applyDeposit(tx, false)
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, nil, err
+			return nil, nil, false, nil, tracerr.Wrap(err)
 		}
 	case common.TxTypeDepositTransfer:
 		s.computeEffectiveAmounts(tx)
@@ -491,7 +492,7 @@ func (s *StateDB) processL1Tx(exitTree *merkletree.MerkleTree, tx *common.L1Tx)
 		err := s.applyDeposit(tx, true)
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, nil, err
+			return nil, nil, false, nil, tracerr.Wrap(err)
 		}
 	case common.TxTypeCreateAccountDepositTransfer:
 		s.computeEffectiveAmounts(tx)
@@ -501,7 +502,7 @@ func (s *StateDB) processL1Tx(exitTree *merkletree.MerkleTree, tx *common.L1Tx)
 		err := s.applyCreateAccountDepositTransfer(tx)
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, nil, err
+			return nil, nil, false, nil, tracerr.Wrap(err)
 		}
 	case common.TxTypeForceExit:
 		s.computeEffectiveAmounts(tx)
@@ -511,7 +512,7 @@ func (s *StateDB) processL1Tx(exitTree *merkletree.MerkleTree, tx *common.L1Tx)
 		exitAccount, newExit, err := s.applyExit(nil, nil, exitTree, tx.Tx())
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, nil, err
+			return nil, nil, false, nil, tracerr.Wrap(err)
 		}
 		return &tx.FromIdx, exitAccount, newExit, nil, nil
 	default:
@@ -523,7 +524,7 @@ func (s *StateDB) processL1Tx(exitTree *merkletree.MerkleTree, tx *common.L1Tx)
 		createdAccount, err = s.GetAccount(s.idx)
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, nil, err
+			return nil, nil, false, nil, tracerr.Wrap(err)
 		}
 	}
 
@@ -542,12 +543,12 @@ func (s *StateDB) processL2Tx(coordIdxsMap map[common.TokenID]common.Idx, collec
 		if s.typ == TypeSynchronizer {
 			// this should never be reached
 			log.Error("WARNING: In StateDB with Synchronizer mode L2.ToIdx can't be 0")
-			return nil, nil, false, fmt.Errorf("In StateDB with Synchronizer mode L2.ToIdx can't be 0")
+			return nil, nil, false, tracerr.Wrap(fmt.Errorf("In StateDB with Synchronizer mode L2.ToIdx can't be 0"))
 		}
 		// case when tx.Type== common.TxTypeTransferToEthAddr or common.TxTypeTransferToBJJ
 		tx.AuxToIdx, err = s.GetIdxByEthAddrBJJ(tx.ToEthAddr, tx.ToBJJ, tx.TokenID)
 		if err != nil {
-			return nil, nil, false, err
+			return nil, nil, false, tracerr.Wrap(err)
 		}
 	}
 
@@ -556,11 +557,11 @@ func (s *StateDB) processL2Tx(coordIdxsMap map[common.TokenID]common.Idx, collec
 		// Txs
 		s.zki.TxCompressedData[s.i], err = tx.TxCompressedData()
 		if err != nil {
-			return nil, nil, false, err
+			return nil, nil, false, tracerr.Wrap(err)
 		}
 		s.zki.TxCompressedDataV2[s.i], err = tx.TxCompressedDataV2()
 		if err != nil {
-			return nil, nil, false, err
+			return nil, nil, false, tracerr.Wrap(err)
 		}
 		s.zki.FromIdx[s.i] = tx.FromIdx.BigInt()
 		s.zki.ToIdx[s.i] = tx.ToIdx.BigInt()
@@ -589,7 +590,7 @@ func (s *StateDB) processL2Tx(coordIdxsMap map[common.TokenID]common.Idx, collec
 		signature, err := tx.Signature.Decompress()
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, err
+			return nil, nil, false, tracerr.Wrap(err)
 		}
 		s.zki.S[s.i] = signature.S
 		s.zki.R8x[s.i] = signature.R8.X
@@ -602,7 +603,7 @@ func (s *StateDB) processL2Tx(coordIdxsMap map[common.TokenID]common.Idx, collec
 		acc, err := s.GetAccount(tx.FromIdx)
 		if err != nil {
 			log.Errorw("GetAccount", "fromIdx", tx.FromIdx, "err", err)
-			return nil, nil, false, err
+			return nil, nil, false, tracerr.Wrap(err)
 		}
 		tx.Nonce = acc.Nonce + 1
 		tx.TokenID = acc.TokenID
@@ -615,14 +616,14 @@ func (s *StateDB) processL2Tx(coordIdxsMap map[common.TokenID]common.Idx, collec
 		err = s.applyTransfer(coordIdxsMap, collectedFees, tx.Tx(), tx.AuxToIdx)
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, err
+			return nil, nil, false, tracerr.Wrap(err)
 		}
 	case common.TxTypeExit:
 		// execute exit flow
 		exitAccount, newExit, err := s.applyExit(coordIdxsMap, collectedFees, exitTree, tx.Tx())
 		if err != nil {
 			log.Error(err)
-			return nil, nil, false, err
+			return nil, nil, false, tracerr.Wrap(err)
 		}
 		return &tx.FromIdx, exitAccount, newExit, nil
 	default:
@@ -643,7 +644,7 @@ func (s *StateDB) applyCreateAccount(tx *common.L1Tx) error {
 
 	p, err := s.CreateAccount(common.Idx(s.idx+1), account)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if s.zki != nil {
 		s.zki.TokenID1[s.i] = tx.TokenID.BigInt()
@@ -683,7 +684,7 @@ func (s *StateDB) applyDeposit(tx *common.L1Tx, transfer bool) error {
 	// deposit the tx.EffectiveLoadAmount into the sender account
 	accSender, err := s.GetAccount(tx.FromIdx)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	accSender.Balance = new(big.Int).Add(accSender.Balance, tx.EffectiveLoadAmount)
 
@@ -692,7 +693,7 @@ func (s *StateDB) applyDeposit(tx *common.L1Tx, transfer bool) error {
 	if transfer {
 		accReceiver, err = s.GetAccount(tx.ToIdx)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		// subtract amount to the sender
 		accSender.Balance = new(big.Int).Sub(accSender.Balance, tx.EffectiveAmount)
@@ -702,7 +703,7 @@ func (s *StateDB) applyDeposit(tx *common.L1Tx, transfer bool) error {
 	// update sender account in localStateDB
 	p, err := s.UpdateAccount(tx.FromIdx, accSender)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if s.zki != nil {
 		s.zki.TokenID1[s.i] = accSender.TokenID.BigInt()
@@ -722,7 +723,7 @@ func (s *StateDB) applyDeposit(tx *common.L1Tx, transfer bool) error {
 		// update receiver account in localStateDB
 		p, err := s.UpdateAccount(tx.ToIdx, accReceiver)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		if s.zki != nil {
 			s.zki.TokenID2[s.i] = accReceiver.TokenID.BigInt()
@@ -757,7 +758,7 @@ func (s *StateDB) applyTransfer(coordIdxsMap map[common.TokenID]common.Idx,
 	accSender, err := s.GetAccount(tx.FromIdx)
 	if err != nil {
 		log.Error(err)
-		return err
+		return tracerr.Wrap(err)
 	}
 	if !tx.IsL1 {
 		// increment nonce
@@ -766,7 +767,7 @@ func (s *StateDB) applyTransfer(coordIdxsMap map[common.TokenID]common.Idx,
 		// compute fee and subtract it from the accSender
 		fee, err := common.CalcFeeAmount(tx.Amount, *tx.Fee)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		feeAndAmount := new(big.Int).Add(tx.Amount, fee)
 		accSender.Balance = new(big.Int).Sub(accSender.Balance, feeAndAmount)
@@ -798,7 +799,7 @@ func (s *StateDB) applyTransfer(coordIdxsMap map[common.TokenID]common.Idx,
 		accReceiver, err = s.GetAccount(auxToIdx)
 		if err != nil {
 			log.Error(err)
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 
@@ -809,7 +810,7 @@ func (s *StateDB) applyTransfer(coordIdxsMap map[common.TokenID]common.Idx,
 	pSender, err := s.UpdateAccount(tx.FromIdx, accSender)
 	if err != nil {
 		log.Error(err)
-		return err
+		return tracerr.Wrap(err)
 	}
 	if s.zki != nil {
 		s.zki.TokenID1[s.i] = accSender.TokenID.BigInt()
@@ -826,7 +827,7 @@ func (s *StateDB) applyTransfer(coordIdxsMap map[common.TokenID]common.Idx,
 	// update receiver account in localStateDB
 	pReceiver, err := s.UpdateAccount(auxToIdx, accReceiver)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if s.zki != nil {
 		s.zki.TokenID2[s.i] = accReceiver.TokenID.BigInt()
@@ -855,7 +856,7 @@ func (s *StateDB) applyCreateAccountDepositTransfer(tx *common.L1Tx) error {
 	}
 	accReceiver, err := s.GetAccount(tx.ToIdx)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// subtract amount to the sender
 	accSender.Balance = new(big.Int).Sub(accSender.Balance, tx.EffectiveAmount)
@@ -865,7 +866,7 @@ func (s *StateDB) applyCreateAccountDepositTransfer(tx *common.L1Tx) error {
 	// create Account of the Sender
 	p, err := s.CreateAccount(common.Idx(s.idx+1), accSender)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if s.zki != nil {
 		s.zki.TokenID1[s.i] = tx.TokenID.BigInt()
@@ -895,7 +896,7 @@ func (s *StateDB) applyCreateAccountDepositTransfer(tx *common.L1Tx) error {
 	// update receiver account in localStateDB
 	p, err = s.UpdateAccount(tx.ToIdx, accReceiver)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if s.zki != nil {
 		s.zki.TokenID2[s.i] = accReceiver.TokenID.BigInt()
@@ -922,7 +923,7 @@ func (s *StateDB) applyExit(coordIdxsMap map[common.TokenID]common.Idx,
 	// add the tx.Amount into the Account (tx.FromIdx) in the ExitMT
 	acc, err := s.GetAccount(tx.FromIdx)
 	if err != nil {
-		return nil, false, err
+		return nil, false, tracerr.Wrap(err)
 	}
 
 	if !tx.IsL1 {
@@ -932,7 +933,7 @@ func (s *StateDB) applyExit(coordIdxsMap map[common.TokenID]common.Idx,
 		// compute fee and subtract it from the accSender
 		fee, err := common.CalcFeeAmount(tx.Amount, *tx.Fee)
 		if err != nil {
-			return nil, false, err
+			return nil, false, tracerr.Wrap(err)
 		}
 		feeAndAmount := new(big.Int).Add(tx.Amount, fee)
 		acc.Balance = new(big.Int).Sub(acc.Balance, feeAndAmount)
@@ -956,7 +957,7 @@ func (s *StateDB) applyExit(coordIdxsMap map[common.TokenID]common.Idx,
 
 	p, err := s.UpdateAccount(tx.FromIdx, acc)
 	if err != nil {
-		return nil, false, err
+		return nil, false, tracerr.Wrap(err)
 	}
 	if s.zki != nil {
 		s.zki.TokenID1[s.i] = acc.TokenID.BigInt()
@@ -974,7 +975,7 @@ func (s *StateDB) applyExit(coordIdxsMap map[common.TokenID]common.Idx,
 		return nil, false, nil
 	}
 	exitAccount, err := getAccountInTreeDB(exitTree.DB(), tx.FromIdx)
-	if err == db.ErrNotFound {
+	if tracerr.Unwrap(err) == db.ErrNotFound {
 		// 1a. if idx does not exist in exitTree:
 		// add new leaf 'ExitTreeLeaf', where ExitTreeLeaf.Balance = exitAmount (exitAmount=tx.Amount)
 		exitAccount := &common.Account{
@@ -985,16 +986,16 @@ func (s *StateDB) applyExit(coordIdxsMap map[common.TokenID]common.Idx,
 			EthAddr:   acc.EthAddr,
 		}
 		_, err = createAccountInTreeDB(exitTree.DB(), exitTree, tx.FromIdx, exitAccount)
-		return exitAccount, true, err
+		return exitAccount, true, tracerr.Wrap(err)
 	} else if err != nil {
-		return exitAccount, false, err
+		return exitAccount, false, tracerr.Wrap(err)
 	}
 
 	// 1b. if idx already exist in exitTree:
 	// update account, where account.Balance += exitAmount
 	exitAccount.Balance = new(big.Int).Add(exitAccount.Balance, tx.Amount)
 	_, err = updateAccountInTreeDB(exitTree.DB(), exitTree, tx.FromIdx, exitAccount)
-	return exitAccount, false, err
+	return exitAccount, false, tracerr.Wrap(err)
 }
 
 // computeEffectiveAmounts checks that the L1Tx data is correct
@@ -1084,11 +1085,11 @@ func (s *StateDB) computeEffectiveAmounts(tx *common.L1Tx) {
 // used for an Account in the localStateDB.
 func (s *StateDB) getIdx() (common.Idx, error) {
 	idxBytes, err := s.DB().Get(keyidx)
-	if err == db.ErrNotFound {
+	if tracerr.Unwrap(err) == db.ErrNotFound {
 		return 0, nil
 	}
 	if err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	return common.IdxFromBytes(idxBytes[:])
 }
@@ -1097,18 +1098,18 @@ func (s *StateDB) getIdx() (common.Idx, error) {
 func (s *StateDB) setIdx(idx common.Idx) error {
 	tx, err := s.DB().NewTx()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	idxBytes, err := idx.Bytes()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	err = tx.Put(keyidx, idxBytes[:])
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	if err := tx.Commit(); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	return nil
 }

db/statedb/utils.go

@@ -8,6 +8,7 @@ import (
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	"github.com/iden3/go-merkletree"
 )
@@ -46,7 +47,7 @@ func (s *StateDB) setIdxByEthAddrBJJ(idx common.Idx, addr ethCommon.Address, pk
 	}
 
 	if pk == nil {
-		return fmt.Errorf("BabyJubJub pk not defined")
+		return tracerr.Wrap(fmt.Errorf("BabyJubJub pk not defined"))
 	}
 
 	// store idx for EthAddr & BJJ assuming that EthAddr & BJJ still don't
@@ -55,28 +56,28 @@ func (s *StateDB) setIdxByEthAddrBJJ(idx common.Idx, addr ethCommon.Address, pk
 	// (smaller)
 	tx, err := s.db.NewTx()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	idxBytes, err := idx.Bytes()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// store Addr&BJJ-idx
 	k := concatEthAddrBJJTokenID(addr, pk, tokenID)
 	err = tx.Put(append(PrefixKeyAddrBJJ, k...), idxBytes[:])
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	// store Addr-idx
 	k = concatEthAddrTokenID(addr, tokenID)
 	err = tx.Put(append(PrefixKeyAddr, k...), idxBytes[:])
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	err = tx.Commit()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	return nil
 }
@@ -88,11 +89,11 @@ func (s *StateDB) GetIdxByEthAddr(addr ethCommon.Address, tokenID common.TokenID
 	k := concatEthAddrTokenID(addr, tokenID)
 	b, err := s.db.Get(append(PrefixKeyAddr, k...))
 	if err != nil {
-		return common.Idx(0), fmt.Errorf("GetIdxByEthAddr: %s: ToEthAddr: %s, TokenID: %d", ErrToIdxNotFound, addr.Hex(), tokenID)
+		return common.Idx(0), tracerr.Wrap(fmt.Errorf("GetIdxByEthAddr: %s: ToEthAddr: %s, TokenID: %d", ErrToIdxNotFound, addr.Hex(), tokenID))
 	}
 	idx, err := common.IdxFromBytes(b)
 	if err != nil {
-		return common.Idx(0), fmt.Errorf("GetIdxByEthAddr: %s: ToEthAddr: %s, TokenID: %d", err, addr.Hex(), tokenID)
+		return common.Idx(0), tracerr.Wrap(fmt.Errorf("GetIdxByEthAddr: %s: ToEthAddr: %s, TokenID: %d", err, addr.Hex(), tokenID))
 	}
 	return idx, nil
 }
@@ -112,16 +113,16 @@ func (s *StateDB) GetIdxByEthAddrBJJ(addr ethCommon.Address, pk *babyjub.PublicK
 		k := concatEthAddrBJJTokenID(addr, pk, tokenID)
 		b, err := s.db.Get(append(PrefixKeyAddrBJJ, k...))
 		if err != nil {
-			return common.Idx(0), fmt.Errorf("GetIdxByEthAddrBJJ: %s: ToEthAddr: %s, ToBJJ: %s, TokenID: %d", ErrToIdxNotFound, addr.Hex(), pk, tokenID)
+			return common.Idx(0), tracerr.Wrap(fmt.Errorf("GetIdxByEthAddrBJJ: %s: ToEthAddr: %s, ToBJJ: %s, TokenID: %d", ErrToIdxNotFound, addr.Hex(), pk, tokenID))
 		}
 		idx, err := common.IdxFromBytes(b)
 		if err != nil {
-			return common.Idx(0), fmt.Errorf("GetIdxByEthAddrBJJ: %s: ToEthAddr: %s, ToBJJ: %s, TokenID: %d", err, addr.Hex(), pk, tokenID)
+			return common.Idx(0), tracerr.Wrap(fmt.Errorf("GetIdxByEthAddrBJJ: %s: ToEthAddr: %s, ToBJJ: %s, TokenID: %d", err, addr.Hex(), pk, tokenID))
 		}
 		return idx, nil
 	}
 	// rest of cases (included case ToEthAddr==0) are not possible
-	return common.Idx(0), fmt.Errorf("GetIdxByEthAddrBJJ: Not found, %s: ToEthAddr: %s, ToBJJ: %s, TokenID: %d", ErrGetIdxNoCase, addr.Hex(), pk, tokenID)
+	return common.Idx(0), tracerr.Wrap(fmt.Errorf("GetIdxByEthAddrBJJ: Not found, %s: ToEthAddr: %s, ToBJJ: %s, TokenID: %d", ErrGetIdxNoCase, addr.Hex(), pk, tokenID))
 }
 
 func (s *StateDB) getTokenIDsFromIdxs(idxs []common.Idx) (map[common.TokenID]common.Idx, error) {
@@ -129,7 +130,7 @@ func (s *StateDB) getTokenIDsFromIdxs(idxs []common.Idx) (map[common.TokenID]com
 	for i := 0; i < len(idxs); i++ {
 		a, err := s.GetAccount(idxs[i])
 		if err != nil {
-			return nil, fmt.Errorf("getTokenIDsFromIdxs error on GetAccount with Idx==%d: %s", idxs[i], err.Error())
+			return nil, tracerr.Wrap(fmt.Errorf("getTokenIDsFromIdxs error on GetAccount with Idx==%d: %s", idxs[i], err.Error()))
 		}
 		m[a.TokenID] = idxs[i]
 	}

db/statedb/utils_test.go

@@ -9,6 +9,7 @@ import (
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/hermeznetwork/hermez-node/common"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -84,7 +85,7 @@ func TestGetIdx(t *testing.T) {
 	idxR, err = sdb.GetIdxByEthAddrBJJ(addr2, pk2, tokenID0)
 	assert.NotNil(t, err)
 	expectedErr := fmt.Errorf("GetIdxByEthAddrBJJ: %s: ToEthAddr: %s, ToBJJ: %s, TokenID: %d", ErrToIdxNotFound, addr2.Hex(), pk2, tokenID0)
-	assert.Equal(t, expectedErr, err)
+	assert.Equal(t, expectedErr, tracerr.Unwrap(err))
 	assert.Equal(t, common.Idx(0), idxR)
 	// expect error when trying to get Idx by addr with not used TokenID
 	_, err = sdb.GetIdxByEthAddr(addr, tokenID1)

db/utils.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/gobuffalo/packr/v2"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/jmoiron/sqlx"
 	migrate "github.com/rubenv/sql-migrate"
 	"github.com/russross/meddler"
@@ -29,7 +30,7 @@ func InitSQLDB(port int, host, user, password, name string) (*sqlx.DB, error) {
 	)
 	db, err := sqlx.Connect("postgres", psqlconn)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	// Run DB migrations
 	migrations := &migrate.PackrMigrationSource{
@@ -37,7 +38,7 @@ func InitSQLDB(port int, host, user, password, name string) (*sqlx.DB, error) {
 	}
 	nMigrations, err := migrate.Exec(db.DB, "postgres", migrations, migrate.Up)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	log.Info("successfully ran ", nMigrations, " migrations")
 	return db, nil
@@ -64,7 +65,7 @@ func BulkInsert(db meddler.DB, q string, args interface{}) error {
 		arg := arrayValue.Index(i).Addr().Interface()
 		elemArglist, err := meddler.Default.Values(arg, true)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		arglist = append(arglist, elemArglist...)
 		value := "("
@@ -76,7 +77,7 @@ func BulkInsert(db meddler.DB, q string, args interface{}) error {
 	}
 	stmt := fmt.Sprintf(q, strings.Join(valueStrings, ","))
 	_, err := db.Exec(stmt, arglist...)
-	return err
+	return tracerr.Wrap(err)
 }
 
 // BigIntMeddler encodes or decodes the field value to or from JSON
@@ -92,7 +93,7 @@ func (b BigIntMeddler) PreRead(fieldAddr interface{}) (scanTarget interface{}, e
 func (b BigIntMeddler) PostRead(fieldPtr, scanTarget interface{}) error {
 	ptr := scanTarget.(*string)
 	if ptr == nil {
-		return fmt.Errorf("BigIntMeddler.PostRead: nil pointer")
+		return tracerr.Wrap(fmt.Errorf("BigIntMeddler.PostRead: nil pointer"))
 	}
 	field := fieldPtr.(**big.Int)
 	*field = new(big.Int).SetBytes([]byte(*ptr))
@@ -126,7 +127,7 @@ func (b BigIntNullMeddler) PostRead(fieldPtr, scanTarget interface{}) error {
 	// not null
 	ptr := (*ptrPtr).([]byte)
 	if ptr == nil {
-		return fmt.Errorf("BigIntMeddler.PostRead: nil pointer")
+		return tracerr.Wrap(fmt.Errorf("BigIntMeddler.PostRead: nil pointer"))
 	}
 	*field = new(big.Int).SetBytes(ptr)
 	return nil

eth/auction.go

@@ -17,6 +17,7 @@ import (
 	HermezAuctionProtocol "github.com/hermeznetwork/hermez-node/eth/contracts/auction"
 	HEZ "github.com/hermeznetwork/hermez-node/eth/contracts/tokenHEZ"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // SlotState is the state of a slot
@@ -238,15 +239,15 @@ type AuctionClient struct {
 func NewAuctionClient(client *EthereumClient, address ethCommon.Address, tokenHEZCfg TokenConfig) (*AuctionClient, error) {
 	contractAbi, err := abi.JSON(strings.NewReader(string(HermezAuctionProtocol.HermezAuctionProtocolABI)))
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	auction, err := HermezAuctionProtocol.NewHermezAuctionProtocol(address, client.Client())
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	tokenHEZ, err := HEZ.NewHEZ(tokenHEZCfg.Address, client.Client())
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &AuctionClient{
 		client:      client,
@@ -268,7 +269,7 @@ func (c *AuctionClient) AuctionSetSlotDeadline(newDeadline uint8) (*types.Transa
 			return c.auction.SetSlotDeadline(auth, newDeadline)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting slotDeadline: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting slotDeadline: %w", err))
 	}
 	return tx, nil
 }
@@ -277,9 +278,9 @@ func (c *AuctionClient) AuctionSetSlotDeadline(newDeadline uint8) (*types.Transa
 func (c *AuctionClient) AuctionGetSlotDeadline() (slotDeadline uint8, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		slotDeadline, err = c.auction.GetSlotDeadline(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	return slotDeadline, nil
 }
@@ -292,7 +293,7 @@ func (c *AuctionClient) AuctionSetOpenAuctionSlots(newOpenAuctionSlots uint16) (
 			return c.auction.SetOpenAuctionSlots(auth, newOpenAuctionSlots)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting openAuctionSlots: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting openAuctionSlots: %w", err))
 	}
 	return tx, nil
 }
@@ -301,9 +302,9 @@ func (c *AuctionClient) AuctionSetOpenAuctionSlots(newOpenAuctionSlots uint16) (
 func (c *AuctionClient) AuctionGetOpenAuctionSlots() (openAuctionSlots uint16, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		openAuctionSlots, err = c.auction.GetOpenAuctionSlots(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	return openAuctionSlots, nil
 }
@@ -316,7 +317,7 @@ func (c *AuctionClient) AuctionSetClosedAuctionSlots(newClosedAuctionSlots uint1
 			return c.auction.SetClosedAuctionSlots(auth, newClosedAuctionSlots)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting closedAuctionSlots: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting closedAuctionSlots: %w", err))
 	}
 	return tx, nil
 }
@@ -325,9 +326,9 @@ func (c *AuctionClient) AuctionSetClosedAuctionSlots(newClosedAuctionSlots uint1
 func (c *AuctionClient) AuctionGetClosedAuctionSlots() (closedAuctionSlots uint16, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		closedAuctionSlots, err = c.auction.GetClosedAuctionSlots(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	return closedAuctionSlots, nil
 }
@@ -340,7 +341,7 @@ func (c *AuctionClient) AuctionSetOutbidding(newOutbidding uint16) (tx *types.Tr
 			return c.auction.SetOutbidding(auth, newOutbidding)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting setOutbidding: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting setOutbidding: %w", err))
 	}
 	return tx, nil
 }
@@ -349,9 +350,9 @@ func (c *AuctionClient) AuctionSetOutbidding(newOutbidding uint16) (tx *types.Tr
 func (c *AuctionClient) AuctionGetOutbidding() (outbidding uint16, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		outbidding, err = c.auction.GetOutbidding(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	return outbidding, nil
 }
@@ -364,7 +365,7 @@ func (c *AuctionClient) AuctionSetAllocationRatio(newAllocationRatio [3]uint16)
 			return c.auction.SetAllocationRatio(auth, newAllocationRatio)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting allocationRatio: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting allocationRatio: %w", err))
 	}
 	return tx, nil
 }
@@ -373,9 +374,9 @@ func (c *AuctionClient) AuctionSetAllocationRatio(newAllocationRatio [3]uint16)
 func (c *AuctionClient) AuctionGetAllocationRatio() (allocationRation [3]uint16, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		allocationRation, err = c.auction.GetAllocationRatio(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return [3]uint16{}, err
+		return [3]uint16{}, tracerr.Wrap(err)
 	}
 	return allocationRation, nil
 }
@@ -388,7 +389,7 @@ func (c *AuctionClient) AuctionSetDonationAddress(newDonationAddress ethCommon.A
 			return c.auction.SetDonationAddress(auth, newDonationAddress)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting donationAddress: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting donationAddress: %w", err))
 	}
 	return tx, nil
 }
@@ -398,9 +399,9 @@ func (c *AuctionClient) AuctionGetDonationAddress() (donationAddress *ethCommon.
 	var _donationAddress ethCommon.Address
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		_donationAddress, err = c.auction.GetDonationAddress(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &_donationAddress, nil
 }
@@ -413,7 +414,7 @@ func (c *AuctionClient) AuctionSetBootCoordinator(newBootCoordinator ethCommon.A
 			return c.auction.SetBootCoordinator(auth, newBootCoordinator)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting bootCoordinator: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting bootCoordinator: %w", err))
 	}
 	return tx, nil
 }
@@ -423,9 +424,9 @@ func (c *AuctionClient) AuctionGetBootCoordinator() (bootCoordinator *ethCommon.
 	var _bootCoordinator ethCommon.Address
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		_bootCoordinator, err = c.auction.GetBootCoordinator(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &_bootCoordinator, nil
 }
@@ -439,7 +440,7 @@ func (c *AuctionClient) AuctionChangeDefaultSlotSetBid(slotSet int64, newInitial
 			return c.auction.ChangeDefaultSlotSetBid(auth, slotSetToSend, newInitialMinBid)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed changing slotSet Bid: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed changing slotSet Bid: %w", err))
 	}
 	return tx, nil
 }
@@ -448,9 +449,9 @@ func (c *AuctionClient) AuctionChangeDefaultSlotSetBid(slotSet int64, newInitial
 func (c *AuctionClient) AuctionGetClaimableHEZ(claimAddress ethCommon.Address) (claimableHEZ *big.Int, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		claimableHEZ, err = c.auction.GetClaimableHEZ(nil, claimAddress)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return claimableHEZ, nil
 }
@@ -463,7 +464,7 @@ func (c *AuctionClient) AuctionSetCoordinator(forger ethCommon.Address, coordina
 			return c.auction.SetCoordinator(auth, forger, coordinatorURL)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed set coordinator: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed set coordinator: %w", err))
 	}
 	return tx, nil
 }
@@ -473,9 +474,9 @@ func (c *AuctionClient) AuctionGetCurrentSlotNumber() (currentSlotNumber int64,
 	var _currentSlotNumber *big.Int
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		_currentSlotNumber, err = c.auction.GetCurrentSlotNumber(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	return _currentSlotNumber.Int64(), nil
 }
@@ -485,9 +486,9 @@ func (c *AuctionClient) AuctionGetMinBidBySlot(slot int64) (minBid *big.Int, err
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		slotToSend := big.NewInt(slot)
 		minBid, err = c.auction.GetMinBidBySlot(nil, slotToSend)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return big.NewInt(0), err
+		return big.NewInt(0), tracerr.Wrap(err)
 	}
 	return minBid, nil
 }
@@ -497,9 +498,9 @@ func (c *AuctionClient) AuctionGetSlotSet(slot int64) (slotSet *big.Int, err err
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		slotToSend := big.NewInt(slot)
 		slotSet, err = c.auction.GetSlotSet(nil, slotToSend)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return big.NewInt(0), err
+		return big.NewInt(0), tracerr.Wrap(err)
 	}
 	return slotSet, nil
 }
@@ -508,9 +509,9 @@ func (c *AuctionClient) AuctionGetSlotSet(slot int64) (slotSet *big.Int, err err
 func (c *AuctionClient) AuctionGetDefaultSlotSetBid(slotSet uint8) (minBidSlotSet *big.Int, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		minBidSlotSet, err = c.auction.GetDefaultSlotSetBid(nil, slotSet)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return big.NewInt(0), err
+		return big.NewInt(0), tracerr.Wrap(err)
 	}
 	return minBidSlotSet, nil
 }
@@ -520,9 +521,9 @@ func (c *AuctionClient) AuctionGetSlotNumber(blockNum int64) (slot int64, err er
 	var _slot *big.Int
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		_slot, err = c.auction.GetSlotNumber(nil, big.NewInt(blockNum))
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	return _slot.Int64(), nil
 }
@@ -536,7 +537,7 @@ func (c *AuctionClient) AuctionBid(amount *big.Int, slot int64, bidAmount *big.I
 			spender := c.address
 			nonce, err := c.tokenHEZ.Nonces(nil, owner)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			tokenName := c.tokenHEZCfg.Name
 			tokenAddr := c.tokenHEZCfg.Address
@@ -548,7 +549,7 @@ func (c *AuctionClient) AuctionBid(amount *big.Int, slot int64, bidAmount *big.I
 			return c.auction.ProcessBid(auth, amount, _slot, bidAmount, permit)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed bid: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed bid: %w", err))
 	}
 	return tx, nil
 }
@@ -563,7 +564,7 @@ func (c *AuctionClient) AuctionMultiBid(amount *big.Int, startingSlot, endingSlo
 			spender := c.address
 			nonce, err := c.tokenHEZ.Nonces(nil, owner)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			tokenName := c.tokenHEZCfg.Name
 			tokenAddr := c.tokenHEZCfg.Address
@@ -577,7 +578,7 @@ func (c *AuctionClient) AuctionMultiBid(amount *big.Int, startingSlot, endingSlo
 			return c.auction.ProcessMultiBid(auth, amount, _startingSlot, _endingSlot, slotSets, maxBid, minBid, permit)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed multibid: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed multibid: %w", err))
 	}
 	return tx, nil
 }
@@ -586,9 +587,9 @@ func (c *AuctionClient) AuctionMultiBid(amount *big.Int, startingSlot, endingSlo
 func (c *AuctionClient) AuctionCanForge(forger ethCommon.Address, blockNum int64) (canForge bool, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		canForge, err = c.auction.CanForge(nil, forger, big.NewInt(blockNum))
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return false, err
+		return false, tracerr.Wrap(err)
 	}
 	return canForge, nil
 }
@@ -601,7 +602,7 @@ func (c *AuctionClient) AuctionClaimHEZ() (tx *types.Transaction, err error) {
 			return c.auction.ClaimHEZ(auth)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed claim HEZ: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed claim HEZ: %w", err))
 	}
 	return tx, nil
 }
@@ -614,7 +615,7 @@ func (c *AuctionClient) AuctionForge(forger ethCommon.Address) (tx *types.Transa
 			return c.auction.Forge(auth, forger)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed forge: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed forge: %w", err))
 	}
 	return tx, nil
 }
@@ -625,25 +626,25 @@ func (c *AuctionClient) AuctionConstants() (auctionConstants *common.AuctionCons
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		auctionConstants.BlocksPerSlot, err = c.auction.BLOCKSPERSLOT(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		genesisBlock, err := c.auction.GenesisBlock(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		auctionConstants.GenesisBlockNum = genesisBlock.Int64()
 		auctionConstants.HermezRollup, err = c.auction.HermezRollup(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		auctionConstants.InitialMinimalBidding, err = c.auction.INITIALMINIMALBIDDING(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		auctionConstants.TokenHEZ, err = c.auction.TokenHEZ(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return auctionConstants, nil
 }
@@ -654,43 +655,43 @@ func (c *AuctionClient) AuctionVariables() (auctionVariables *common.AuctionVari
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		auctionVariables.AllocationRatio, err = c.AuctionGetAllocationRatio()
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		bootCoordinator, err := c.AuctionGetBootCoordinator()
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		auctionVariables.BootCoordinator = *bootCoordinator
 		auctionVariables.ClosedAuctionSlots, err = c.AuctionGetClosedAuctionSlots()
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		var defaultSlotSetBid [6]*big.Int
 		for i := uint8(0); i < 6; i++ {
 			bid, err := c.AuctionGetDefaultSlotSetBid(i)
 			if err != nil {
-				return err
+				return tracerr.Wrap(err)
 			}
 			defaultSlotSetBid[i] = bid
 		}
 		auctionVariables.DefaultSlotSetBid = defaultSlotSetBid
 		donationAddress, err := c.AuctionGetDonationAddress()
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		auctionVariables.DonationAddress = *donationAddress
 		auctionVariables.OpenAuctionSlots, err = c.AuctionGetOpenAuctionSlots()
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		auctionVariables.Outbidding, err = c.AuctionGetOutbidding()
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		auctionVariables.SlotDeadline, err = c.AuctionGetSlotDeadline()
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return auctionVariables, nil
 }
@@ -729,7 +730,7 @@ func (c *AuctionClient) AuctionEventsByBlock(blockNum int64) (*AuctionEvents, *e
 
 	logs, err := c.client.client.FilterLogs(context.TODO(), query)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	if len(logs) > 0 {
 		blockHash = &logs[0].BlockHash
@@ -737,7 +738,7 @@ func (c *AuctionClient) AuctionEventsByBlock(blockNum int64) (*AuctionEvents, *e
 	for _, vLog := range logs {
 		if vLog.BlockHash != *blockHash {
 			log.Errorw("Block hash mismatch", "expected", blockHash.String(), "got", vLog.BlockHash.String())
-			return nil, nil, ErrBlockHashMismatchEvent
+			return nil, nil, tracerr.Wrap(ErrBlockHashMismatchEvent)
 		}
 		switch vLog.Topics[0] {
 		case logAuctionNewBid:
@@ -748,7 +749,7 @@ func (c *AuctionClient) AuctionEventsByBlock(blockNum int64) (*AuctionEvents, *e
 			}
 			var newBid AuctionEventNewBid
 			if err := c.contractAbi.Unpack(&auxNewBid, "NewBid", vLog.Data); err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			newBid.BidAmount = auxNewBid.BidAmount
 			newBid.Slot = new(big.Int).SetBytes(vLog.Topics[1][:]).Int64()
@@ -757,19 +758,19 @@ func (c *AuctionClient) AuctionEventsByBlock(blockNum int64) (*AuctionEvents, *e
 		case logAuctionNewSlotDeadline:
 			var newSlotDeadline AuctionEventNewSlotDeadline
 			if err := c.contractAbi.Unpack(&newSlotDeadline, "NewSlotDeadline", vLog.Data); err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			auctionEvents.NewSlotDeadline = append(auctionEvents.NewSlotDeadline, newSlotDeadline)
 		case logAuctionNewClosedAuctionSlots:
 			var newClosedAuctionSlots AuctionEventNewClosedAuctionSlots
 			if err := c.contractAbi.Unpack(&newClosedAuctionSlots, "NewClosedAuctionSlots", vLog.Data); err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			auctionEvents.NewClosedAuctionSlots = append(auctionEvents.NewClosedAuctionSlots, newClosedAuctionSlots)
 		case logAuctionNewOutbidding:
 			var newOutbidding AuctionEventNewOutbidding
 			if err := c.contractAbi.Unpack(&newOutbidding, "NewOutbidding", vLog.Data); err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			auctionEvents.NewOutbidding = append(auctionEvents.NewOutbidding, newOutbidding)
 		case logAuctionNewDonationAddress:
@@ -783,19 +784,19 @@ func (c *AuctionClient) AuctionEventsByBlock(blockNum int64) (*AuctionEvents, *e
 		case logAuctionNewOpenAuctionSlots:
 			var newOpenAuctionSlots AuctionEventNewOpenAuctionSlots
 			if err := c.contractAbi.Unpack(&newOpenAuctionSlots, "NewOpenAuctionSlots", vLog.Data); err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			auctionEvents.NewOpenAuctionSlots = append(auctionEvents.NewOpenAuctionSlots, newOpenAuctionSlots)
 		case logAuctionNewAllocationRatio:
 			var newAllocationRatio AuctionEventNewAllocationRatio
 			if err := c.contractAbi.Unpack(&newAllocationRatio, "NewAllocationRatio", vLog.Data); err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			auctionEvents.NewAllocationRatio = append(auctionEvents.NewAllocationRatio, newAllocationRatio)
 		case logAuctionSetCoordinator:
 			var setCoordinator AuctionEventSetCoordinator
 			if err := c.contractAbi.Unpack(&setCoordinator, "SetCoordinator", vLog.Data); err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			setCoordinator.BidderAddress = ethCommon.BytesToAddress(vLog.Topics[1].Bytes())
 			setCoordinator.ForgerAddress = ethCommon.BytesToAddress(vLog.Topics[2].Bytes())
@@ -803,7 +804,7 @@ func (c *AuctionClient) AuctionEventsByBlock(blockNum int64) (*AuctionEvents, *e
 		case logAuctionNewForgeAllocated:
 			var newForgeAllocated AuctionEventNewForgeAllocated
 			if err := c.contractAbi.Unpack(&newForgeAllocated, "NewForgeAllocated", vLog.Data); err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			newForgeAllocated.Bidder = ethCommon.BytesToAddress(vLog.Topics[1].Bytes())
 			newForgeAllocated.Forger = ethCommon.BytesToAddress(vLog.Topics[2].Bytes())
@@ -816,7 +817,7 @@ func (c *AuctionClient) AuctionEventsByBlock(blockNum int64) (*AuctionEvents, *e
 			}
 			var newDefaultSlotSetBid AuctionEventNewDefaultSlotSetBid
 			if err := c.contractAbi.Unpack(&auxNewDefaultSlotSetBid, "NewDefaultSlotSetBid", vLog.Data); err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			newDefaultSlotSetBid.NewInitialMinBid = auxNewDefaultSlotSetBid.NewInitialMinBid
 			newDefaultSlotSetBid.SlotSet = auxNewDefaultSlotSetBid.SlotSet.Int64()
@@ -829,7 +830,7 @@ func (c *AuctionClient) AuctionEventsByBlock(blockNum int64) (*AuctionEvents, *e
 		case logAuctionHEZClaimed:
 			var HEZClaimed AuctionEventHEZClaimed
 			if err := c.contractAbi.Unpack(&HEZClaimed, "HEZClaimed", vLog.Data); err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			HEZClaimed.Owner = ethCommon.BytesToAddress(vLog.Topics[1].Bytes())
 			auctionEvents.HEZClaimed = append(auctionEvents.HEZClaimed, HEZClaimed)

eth/client.go

@@ -7,6 +7,7 @@ import (
 	ethKeystore "github.com/ethereum/go-ethereum/accounts/keystore"
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/hermeznetwork/tracerr"
 )
 
 var errTODO = fmt.Errorf("TODO: Not implemented yet")
@@ -67,15 +68,15 @@ func NewClient(client *ethclient.Client, account *accounts.Account, ks *ethKeyst
 	ethereumClient := NewEthereumClient(client, account, ks, &cfg.Ethereum)
 	auctionClient, err := NewAuctionClient(ethereumClient, cfg.Auction.Address, cfg.Auction.TokenHEZ)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	rollupClient, err := NewRollupClient(ethereumClient, cfg.Rollup.Address, cfg.Auction.TokenHEZ)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	wDelayerClient, err := NewWDelayerClient(ethereumClient, cfg.WDelayer.Address)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &Client{
 		EthereumClient: *ethereumClient,

eth/contracts/auction/HermezAuctionProtocol.go

@@ -13,6 +13,7 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/event"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -36,12 +37,12 @@ var HermezAuctionProtocolBin = "0x608060405234801561001057600080fd5b50613d678061
 func DeployHermezAuctionProtocol(auth *bind.TransactOpts, backend bind.ContractBackend) (common.Address, *types.Transaction, *HermezAuctionProtocol, error) {
 	parsed, err := abi.JSON(strings.NewReader(HermezAuctionProtocolABI))
 	if err != nil {
-		return common.Address{}, nil, nil, err
+		return common.Address{}, nil, nil, tracerr.Wrap(err)
 	}
 
 	address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(HermezAuctionProtocolBin), backend)
 	if err != nil {
-		return common.Address{}, nil, nil, err
+		return common.Address{}, nil, nil, tracerr.Wrap(err)
 	}
 	return address, tx, &HermezAuctionProtocol{HermezAuctionProtocolCaller: HermezAuctionProtocolCaller{contract: contract}, HermezAuctionProtocolTransactor: HermezAuctionProtocolTransactor{contract: contract}, HermezAuctionProtocolFilterer: HermezAuctionProtocolFilterer{contract: contract}}, nil
 }
@@ -109,7 +110,7 @@ type HermezAuctionProtocolTransactorRaw struct {
 func NewHermezAuctionProtocol(address common.Address, backend bind.ContractBackend) (*HermezAuctionProtocol, error) {
 	contract, err := bindHermezAuctionProtocol(address, backend, backend, backend)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocol{HermezAuctionProtocolCaller: HermezAuctionProtocolCaller{contract: contract}, HermezAuctionProtocolTransactor: HermezAuctionProtocolTransactor{contract: contract}, HermezAuctionProtocolFilterer: HermezAuctionProtocolFilterer{contract: contract}}, nil
 }
@@ -118,7 +119,7 @@ func NewHermezAuctionProtocol(address common.Address, backend bind.ContractBacke
 func NewHermezAuctionProtocolCaller(address common.Address, caller bind.ContractCaller) (*HermezAuctionProtocolCaller, error) {
 	contract, err := bindHermezAuctionProtocol(address, caller, nil, nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolCaller{contract: contract}, nil
 }
@@ -127,7 +128,7 @@ func NewHermezAuctionProtocolCaller(address common.Address, caller bind.Contract
 func NewHermezAuctionProtocolTransactor(address common.Address, transactor bind.ContractTransactor) (*HermezAuctionProtocolTransactor, error) {
 	contract, err := bindHermezAuctionProtocol(address, nil, transactor, nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolTransactor{contract: contract}, nil
 }
@@ -136,7 +137,7 @@ func NewHermezAuctionProtocolTransactor(address common.Address, transactor bind.
 func NewHermezAuctionProtocolFilterer(address common.Address, filterer bind.ContractFilterer) (*HermezAuctionProtocolFilterer, error) {
 	contract, err := bindHermezAuctionProtocol(address, nil, nil, filterer)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolFilterer{contract: contract}, nil
 }
@@ -145,7 +146,7 @@ func NewHermezAuctionProtocolFilterer(address common.Address, filterer bind.Cont
 func bindHermezAuctionProtocol(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
 	parsed, err := abi.JSON(strings.NewReader(HermezAuctionProtocolABI))
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
 }
@@ -197,7 +198,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) BLOCKSPERSLOT(opts *b
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "BLOCKS_PER_SLOT")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // BLOCKSPERSLOT is a free data retrieval call binding the contract method 0x2243de47.
@@ -223,7 +224,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) INITIALMINIMALBIDDING
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "INITIAL_MINIMAL_BIDDING")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // INITIALMINIMALBIDDING is a free data retrieval call binding the contract method 0xe6065914.
@@ -249,7 +250,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) CanForge(opts *bind.C
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "canForge", forger, blockNumber)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // CanForge is a free data retrieval call binding the contract method 0x83b1f6a0.
@@ -279,7 +280,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) Coordinators(opts *bi
 	})
 	out := ret
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "coordinators", arg0)
-	return *ret, err
+	return *ret, tracerr.Wrap(err)
 }
 
 // Coordinators is a free data retrieval call binding the contract method 0xa48af096.
@@ -311,7 +312,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GenesisBlock(opts *bi
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "genesisBlock")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GenesisBlock is a free data retrieval call binding the contract method 0x4cdc9c63.
@@ -337,7 +338,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetAllocationRatio(op
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getAllocationRatio")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetAllocationRatio is a free data retrieval call binding the contract method 0xec29159b.
@@ -363,7 +364,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetBootCoordinator(op
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getBootCoordinator")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetBootCoordinator is a free data retrieval call binding the contract method 0xb5f7f2f0.
@@ -389,7 +390,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetClaimableHEZ(opts
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getClaimableHEZ", bidder)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetClaimableHEZ is a free data retrieval call binding the contract method 0x5cca4903.
@@ -415,7 +416,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetClosedAuctionSlots
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getClosedAuctionSlots")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetClosedAuctionSlots is a free data retrieval call binding the contract method 0x4da9639d.
@@ -441,7 +442,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetCurrentSlotNumber(
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getCurrentSlotNumber")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetCurrentSlotNumber is a free data retrieval call binding the contract method 0x0c4da4f6.
@@ -467,7 +468,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetDefaultSlotSetBid(
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getDefaultSlotSetBid", slotSet)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetDefaultSlotSetBid is a free data retrieval call binding the contract method 0x564e6a71.
@@ -493,7 +494,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetDonationAddress(op
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getDonationAddress")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetDonationAddress is a free data retrieval call binding the contract method 0x54c03ab7.
@@ -519,7 +520,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetMinBidBySlot(opts
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getMinBidBySlot", slot)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetMinBidBySlot is a free data retrieval call binding the contract method 0x37d1bd0b.
@@ -545,7 +546,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetOpenAuctionSlots(o
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getOpenAuctionSlots")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetOpenAuctionSlots is a free data retrieval call binding the contract method 0xac4b9012.
@@ -571,7 +572,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetOutbidding(opts *b
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getOutbidding")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetOutbidding is a free data retrieval call binding the contract method 0x55b442e6.
@@ -597,7 +598,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetSlotDeadline(opts
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getSlotDeadline")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetSlotDeadline is a free data retrieval call binding the contract method 0x13de9af2.
@@ -623,7 +624,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetSlotNumber(opts *b
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getSlotNumber", blockNumber)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetSlotNumber is a free data retrieval call binding the contract method 0xb3dc7bb1.
@@ -649,7 +650,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) GetSlotSet(opts *bind
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "getSlotSet", slot)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetSlotSet is a free data retrieval call binding the contract method 0xac5f658b.
@@ -675,7 +676,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) HermezRollup(opts *bi
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "hermezRollup")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // HermezRollup is a free data retrieval call binding the contract method 0xaebd6d98.
@@ -701,7 +702,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) PendingBalances(opts
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "pendingBalances", arg0)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // PendingBalances is a free data retrieval call binding the contract method 0xecdae41b.
@@ -735,7 +736,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) Slots(opts *bind.Call
 	})
 	out := ret
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "slots", arg0)
-	return *ret, err
+	return *ret, tracerr.Wrap(err)
 }
 
 // Slots is a free data retrieval call binding the contract method 0xbc415567.
@@ -771,7 +772,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolCaller) TokenHEZ(opts *bind.C
 	)
 	out := ret0
 	err := _HermezAuctionProtocol.contract.Call(opts, out, "tokenHEZ")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // TokenHEZ is a free data retrieval call binding the contract method 0x79a135e3.
@@ -1168,7 +1169,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterHEZClaimed(op
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "HEZClaimed", ownerRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolHEZClaimedIterator{contract: _HermezAuctionProtocol.contract, event: "HEZClaimed", logs: logs, sub: sub}, nil
 }
@@ -1185,7 +1186,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchHEZClaimed(opt
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "HEZClaimed", ownerRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1195,19 +1196,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchHEZClaimed(opt
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolHEZClaimed)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "HEZClaimed", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1221,7 +1222,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchHEZClaimed(opt
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseHEZClaimed(log types.Log) (*HermezAuctionProtocolHEZClaimed, error) {
 	event := new(HermezAuctionProtocolHEZClaimed)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "HEZClaimed", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1306,7 +1307,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewAllocation
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewAllocationRatio")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewAllocationRatioIterator{contract: _HermezAuctionProtocol.contract, event: "NewAllocationRatio", logs: logs, sub: sub}, nil
 }
@@ -1318,7 +1319,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewAllocationR
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewAllocationRatio")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1328,19 +1329,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewAllocationR
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewAllocationRatio)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewAllocationRatio", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1354,7 +1355,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewAllocationR
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewAllocationRatio(log types.Log) (*HermezAuctionProtocolNewAllocationRatio, error) {
 	event := new(HermezAuctionProtocolNewAllocationRatio)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewAllocationRatio", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1451,7 +1452,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewBid(opts *
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewBid", slotRule, bidderRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewBidIterator{contract: _HermezAuctionProtocol.contract, event: "NewBid", logs: logs, sub: sub}, nil
 }
@@ -1473,7 +1474,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewBid(opts *b
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewBid", slotRule, bidderRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1483,19 +1484,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewBid(opts *b
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewBid)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewBid", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1509,7 +1510,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewBid(opts *b
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewBid(log types.Log) (*HermezAuctionProtocolNewBid, error) {
 	event := new(HermezAuctionProtocolNewBid)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewBid", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1599,7 +1600,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewBootCoordi
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewBootCoordinator", newBootCoordinatorRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewBootCoordinatorIterator{contract: _HermezAuctionProtocol.contract, event: "NewBootCoordinator", logs: logs, sub: sub}, nil
 }
@@ -1616,7 +1617,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewBootCoordin
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewBootCoordinator", newBootCoordinatorRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1626,19 +1627,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewBootCoordin
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewBootCoordinator)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewBootCoordinator", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1652,7 +1653,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewBootCoordin
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewBootCoordinator(log types.Log) (*HermezAuctionProtocolNewBootCoordinator, error) {
 	event := new(HermezAuctionProtocolNewBootCoordinator)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewBootCoordinator", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1737,7 +1738,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewClosedAuct
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewClosedAuctionSlots")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewClosedAuctionSlotsIterator{contract: _HermezAuctionProtocol.contract, event: "NewClosedAuctionSlots", logs: logs, sub: sub}, nil
 }
@@ -1749,7 +1750,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewClosedAucti
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewClosedAuctionSlots")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1759,19 +1760,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewClosedAucti
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewClosedAuctionSlots)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewClosedAuctionSlots", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1785,7 +1786,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewClosedAucti
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewClosedAuctionSlots(log types.Log) (*HermezAuctionProtocolNewClosedAuctionSlots, error) {
 	event := new(HermezAuctionProtocolNewClosedAuctionSlots)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewClosedAuctionSlots", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1871,7 +1872,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewDefaultSlo
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewDefaultSlotSetBid")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewDefaultSlotSetBidIterator{contract: _HermezAuctionProtocol.contract, event: "NewDefaultSlotSetBid", logs: logs, sub: sub}, nil
 }
@@ -1883,7 +1884,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewDefaultSlot
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewDefaultSlotSetBid")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1893,19 +1894,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewDefaultSlot
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewDefaultSlotSetBid)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewDefaultSlotSetBid", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1919,7 +1920,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewDefaultSlot
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewDefaultSlotSetBid(log types.Log) (*HermezAuctionProtocolNewDefaultSlotSetBid, error) {
 	event := new(HermezAuctionProtocolNewDefaultSlotSetBid)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewDefaultSlotSetBid", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2009,7 +2010,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewDonationAd
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewDonationAddress", newDonationAddressRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewDonationAddressIterator{contract: _HermezAuctionProtocol.contract, event: "NewDonationAddress", logs: logs, sub: sub}, nil
 }
@@ -2026,7 +2027,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewDonationAdd
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewDonationAddress", newDonationAddressRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2036,19 +2037,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewDonationAdd
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewDonationAddress)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewDonationAddress", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2062,7 +2063,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewDonationAdd
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewDonationAddress(log types.Log) (*HermezAuctionProtocolNewDonationAddress, error) {
 	event := new(HermezAuctionProtocolNewDonationAddress)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewDonationAddress", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2157,7 +2158,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewForge(opts
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewForge", forgerRule, slotToForgeRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewForgeIterator{contract: _HermezAuctionProtocol.contract, event: "NewForge", logs: logs, sub: sub}, nil
 }
@@ -2178,7 +2179,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewForge(opts
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewForge", forgerRule, slotToForgeRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2188,19 +2189,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewForge(opts
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewForge)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewForge", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2214,7 +2215,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewForge(opts
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewForge(log types.Log) (*HermezAuctionProtocolNewForge, error) {
 	event := new(HermezAuctionProtocolNewForge)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewForge", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2317,7 +2318,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewForgeAlloc
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewForgeAllocated", bidderRule, forgerRule, slotToForgeRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewForgeAllocatedIterator{contract: _HermezAuctionProtocol.contract, event: "NewForgeAllocated", logs: logs, sub: sub}, nil
 }
@@ -2342,7 +2343,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewForgeAlloca
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewForgeAllocated", bidderRule, forgerRule, slotToForgeRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2352,19 +2353,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewForgeAlloca
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewForgeAllocated)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewForgeAllocated", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2378,7 +2379,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewForgeAlloca
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewForgeAllocated(log types.Log) (*HermezAuctionProtocolNewForgeAllocated, error) {
 	event := new(HermezAuctionProtocolNewForgeAllocated)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewForgeAllocated", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2463,7 +2464,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewOpenAuctio
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewOpenAuctionSlots")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewOpenAuctionSlotsIterator{contract: _HermezAuctionProtocol.contract, event: "NewOpenAuctionSlots", logs: logs, sub: sub}, nil
 }
@@ -2475,7 +2476,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewOpenAuction
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewOpenAuctionSlots")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2485,19 +2486,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewOpenAuction
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewOpenAuctionSlots)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewOpenAuctionSlots", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2511,7 +2512,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewOpenAuction
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewOpenAuctionSlots(log types.Log) (*HermezAuctionProtocolNewOpenAuctionSlots, error) {
 	event := new(HermezAuctionProtocolNewOpenAuctionSlots)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewOpenAuctionSlots", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2596,7 +2597,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewOutbidding
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewOutbidding")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewOutbiddingIterator{contract: _HermezAuctionProtocol.contract, event: "NewOutbidding", logs: logs, sub: sub}, nil
 }
@@ -2608,7 +2609,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewOutbidding(
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewOutbidding")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2618,19 +2619,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewOutbidding(
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewOutbidding)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewOutbidding", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2644,7 +2645,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewOutbidding(
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewOutbidding(log types.Log) (*HermezAuctionProtocolNewOutbidding, error) {
 	event := new(HermezAuctionProtocolNewOutbidding)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewOutbidding", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2729,7 +2730,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterNewSlotDeadli
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "NewSlotDeadline")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolNewSlotDeadlineIterator{contract: _HermezAuctionProtocol.contract, event: "NewSlotDeadline", logs: logs, sub: sub}, nil
 }
@@ -2741,7 +2742,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewSlotDeadlin
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "NewSlotDeadline")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2751,19 +2752,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewSlotDeadlin
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolNewSlotDeadline)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewSlotDeadline", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2777,7 +2778,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchNewSlotDeadlin
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseNewSlotDeadline(log types.Log) (*HermezAuctionProtocolNewSlotDeadline, error) {
 	event := new(HermezAuctionProtocolNewSlotDeadline)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "NewSlotDeadline", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2873,7 +2874,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) FilterSetCoordinato
 
 	logs, sub, err := _HermezAuctionProtocol.contract.FilterLogs(opts, "SetCoordinator", bidderRule, forgerRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAuctionProtocolSetCoordinatorIterator{contract: _HermezAuctionProtocol.contract, event: "SetCoordinator", logs: logs, sub: sub}, nil
 }
@@ -2894,7 +2895,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchSetCoordinator
 
 	logs, sub, err := _HermezAuctionProtocol.contract.WatchLogs(opts, "SetCoordinator", bidderRule, forgerRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2904,19 +2905,19 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchSetCoordinator
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAuctionProtocolSetCoordinator)
 				if err := _HermezAuctionProtocol.contract.UnpackLog(event, "SetCoordinator", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2930,7 +2931,7 @@ func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) WatchSetCoordinator
 func (_HermezAuctionProtocol *HermezAuctionProtocolFilterer) ParseSetCoordinator(log types.Log) (*HermezAuctionProtocolSetCoordinator, error) {
 	event := new(HermezAuctionProtocolSetCoordinator)
 	if err := _HermezAuctionProtocol.contract.UnpackLog(event, "SetCoordinator", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }

eth/contracts/hermez/Hermez.go

@@ -13,6 +13,7 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/event"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -36,12 +37,12 @@ var HermezBin = "0x608060405234801561001057600080fd5b506158f6806100206000396000f
 func DeployHermez(auth *bind.TransactOpts, backend bind.ContractBackend) (common.Address, *types.Transaction, *Hermez, error) {
 	parsed, err := abi.JSON(strings.NewReader(HermezABI))
 	if err != nil {
-		return common.Address{}, nil, nil, err
+		return common.Address{}, nil, nil, tracerr.Wrap(err)
 	}
 
 	address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(HermezBin), backend)
 	if err != nil {
-		return common.Address{}, nil, nil, err
+		return common.Address{}, nil, nil, tracerr.Wrap(err)
 	}
 	return address, tx, &Hermez{HermezCaller: HermezCaller{contract: contract}, HermezTransactor: HermezTransactor{contract: contract}, HermezFilterer: HermezFilterer{contract: contract}}, nil
 }
@@ -109,7 +110,7 @@ type HermezTransactorRaw struct {
 func NewHermez(address common.Address, backend bind.ContractBackend) (*Hermez, error) {
 	contract, err := bindHermez(address, backend, backend, backend)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &Hermez{HermezCaller: HermezCaller{contract: contract}, HermezTransactor: HermezTransactor{contract: contract}, HermezFilterer: HermezFilterer{contract: contract}}, nil
 }
@@ -118,7 +119,7 @@ func NewHermez(address common.Address, backend bind.ContractBackend) (*Hermez, e
 func NewHermezCaller(address common.Address, caller bind.ContractCaller) (*HermezCaller, error) {
 	contract, err := bindHermez(address, caller, nil, nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezCaller{contract: contract}, nil
 }
@@ -127,7 +128,7 @@ func NewHermezCaller(address common.Address, caller bind.ContractCaller) (*Herme
 func NewHermezTransactor(address common.Address, transactor bind.ContractTransactor) (*HermezTransactor, error) {
 	contract, err := bindHermez(address, nil, transactor, nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezTransactor{contract: contract}, nil
 }
@@ -136,7 +137,7 @@ func NewHermezTransactor(address common.Address, transactor bind.ContractTransac
 func NewHermezFilterer(address common.Address, filterer bind.ContractFilterer) (*HermezFilterer, error) {
 	contract, err := bindHermez(address, nil, nil, filterer)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezFilterer{contract: contract}, nil
 }
@@ -145,7 +146,7 @@ func NewHermezFilterer(address common.Address, filterer bind.ContractFilterer) (
 func bindHermez(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
 	parsed, err := abi.JSON(strings.NewReader(HermezABI))
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
 }
@@ -197,7 +198,7 @@ func (_Hermez *HermezCaller) ABSOLUTEMAXL1L2BATCHTIMEOUT(opts *bind.CallOpts) (u
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "ABSOLUTE_MAX_L1L2BATCHTIMEOUT")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // ABSOLUTEMAXL1L2BATCHTIMEOUT is a free data retrieval call binding the contract method 0x95a09f2a.
@@ -233,7 +234,7 @@ func (_Hermez *HermezCaller) Buckets(opts *bind.CallOpts, arg0 *big.Int) (struct
 	})
 	out := ret
 	err := _Hermez.contract.Call(opts, out, "buckets", arg0)
-	return *ret, err
+	return *ret, tracerr.Wrap(err)
 }
 
 // Buckets is a free data retrieval call binding the contract method 0x9b51fb0d.
@@ -271,7 +272,7 @@ func (_Hermez *HermezCaller) ExitNullifierMap(opts *bind.CallOpts, arg0 uint64,
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "exitNullifierMap", arg0, arg1)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // ExitNullifierMap is a free data retrieval call binding the contract method 0xe9b5269c.
@@ -297,7 +298,7 @@ func (_Hermez *HermezCaller) ExitRootsMap(opts *bind.CallOpts, arg0 uint64) (*bi
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "exitRootsMap", arg0)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // ExitRootsMap is a free data retrieval call binding the contract method 0x506d5463.
@@ -323,7 +324,7 @@ func (_Hermez *HermezCaller) FeeAddToken(opts *bind.CallOpts) (*big.Int, error)
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "feeAddToken")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // FeeAddToken is a free data retrieval call binding the contract method 0xbded9bb8.
@@ -349,7 +350,7 @@ func (_Hermez *HermezCaller) ForgeL1L2BatchTimeout(opts *bind.CallOpts) (uint8,
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "forgeL1L2BatchTimeout")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // ForgeL1L2BatchTimeout is a free data retrieval call binding the contract method 0xa3275838.
@@ -375,7 +376,7 @@ func (_Hermez *HermezCaller) HermezAuctionContract(opts *bind.CallOpts) (common.
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "hermezAuctionContract")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // HermezAuctionContract is a free data retrieval call binding the contract method 0x2bd83626.
@@ -401,7 +402,7 @@ func (_Hermez *HermezCaller) HermezGovernanceDAOAddress(opts *bind.CallOpts) (co
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "hermezGovernanceDAOAddress")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // HermezGovernanceDAOAddress is a free data retrieval call binding the contract method 0xdd46bf84.
@@ -427,7 +428,7 @@ func (_Hermez *HermezCaller) InstantWithdrawalViewer(opts *bind.CallOpts, tokenA
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "instantWithdrawalViewer", tokenAddress, amount)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // InstantWithdrawalViewer is a free data retrieval call binding the contract method 0x375110aa.
@@ -453,7 +454,7 @@ func (_Hermez *HermezCaller) LastForgedBatch(opts *bind.CallOpts) (uint64, error
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "lastForgedBatch")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // LastForgedBatch is a free data retrieval call binding the contract method 0x44e0b2ce.
@@ -479,7 +480,7 @@ func (_Hermez *HermezCaller) LastIdx(opts *bind.CallOpts) (*big.Int, error) {
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "lastIdx")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // LastIdx is a free data retrieval call binding the contract method 0xd486645c.
@@ -505,7 +506,7 @@ func (_Hermez *HermezCaller) LastL1L2Batch(opts *bind.CallOpts) (uint64, error)
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "lastL1L2Batch")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // LastL1L2Batch is a free data retrieval call binding the contract method 0x84ef9ed4.
@@ -531,7 +532,7 @@ func (_Hermez *HermezCaller) MapL1TxQueue(opts *bind.CallOpts, arg0 uint64) ([]b
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "mapL1TxQueue", arg0)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // MapL1TxQueue is a free data retrieval call binding the contract method 0xe796fcf3.
@@ -557,7 +558,7 @@ func (_Hermez *HermezCaller) NextL1FillingQueue(opts *bind.CallOpts) (uint64, er
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "nextL1FillingQueue")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // NextL1FillingQueue is a free data retrieval call binding the contract method 0x0ee8e52b.
@@ -583,7 +584,7 @@ func (_Hermez *HermezCaller) NextL1ToForgeQueue(opts *bind.CallOpts) (uint64, er
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "nextL1ToForgeQueue")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // NextL1ToForgeQueue is a free data retrieval call binding the contract method 0xd0f32e67.
@@ -609,7 +610,7 @@ func (_Hermez *HermezCaller) RegisterTokensCount(opts *bind.CallOpts) (*big.Int,
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "registerTokensCount")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // RegisterTokensCount is a free data retrieval call binding the contract method 0x9f34e9a3.
@@ -641,7 +642,7 @@ func (_Hermez *HermezCaller) RollupVerifiers(opts *bind.CallOpts, arg0 *big.Int)
 	})
 	out := ret
 	err := _Hermez.contract.Call(opts, out, "rollupVerifiers", arg0)
-	return *ret, err
+	return *ret, tracerr.Wrap(err)
 }
 
 // RollupVerifiers is a free data retrieval call binding the contract method 0x38330200.
@@ -675,7 +676,7 @@ func (_Hermez *HermezCaller) SafetyAddress(opts *bind.CallOpts) (common.Address,
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "safetyAddress")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // SafetyAddress is a free data retrieval call binding the contract method 0xe56e27ae.
@@ -701,7 +702,7 @@ func (_Hermez *HermezCaller) StateRootMap(opts *bind.CallOpts, arg0 uint64) (*bi
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "stateRootMap", arg0)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // StateRootMap is a free data retrieval call binding the contract method 0x86c6acc1.
@@ -727,7 +728,7 @@ func (_Hermez *HermezCaller) TokenExchange(opts *bind.CallOpts, arg0 common.Addr
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "tokenExchange", arg0)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // TokenExchange is a free data retrieval call binding the contract method 0x0dd94b96.
@@ -753,7 +754,7 @@ func (_Hermez *HermezCaller) TokenHEZ(opts *bind.CallOpts) (common.Address, erro
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "tokenHEZ")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // TokenHEZ is a free data retrieval call binding the contract method 0x79a135e3.
@@ -779,7 +780,7 @@ func (_Hermez *HermezCaller) TokenList(opts *bind.CallOpts, arg0 *big.Int) (comm
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "tokenList", arg0)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // TokenList is a free data retrieval call binding the contract method 0x9ead7222.
@@ -805,7 +806,7 @@ func (_Hermez *HermezCaller) TokenMap(opts *bind.CallOpts, arg0 common.Address)
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "tokenMap", arg0)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // TokenMap is a free data retrieval call binding the contract method 0x004aca6e.
@@ -831,7 +832,7 @@ func (_Hermez *HermezCaller) WithdrawDelayerContract(opts *bind.CallOpts) (commo
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "withdrawDelayerContract")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // WithdrawDelayerContract is a free data retrieval call binding the contract method 0x1b0a8223.
@@ -857,7 +858,7 @@ func (_Hermez *HermezCaller) WithdrawVerifier(opts *bind.CallOpts) (common.Addre
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "withdrawVerifier")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // WithdrawVerifier is a free data retrieval call binding the contract method 0x864eb164.
@@ -883,7 +884,7 @@ func (_Hermez *HermezCaller) WithdrawalDelay(opts *bind.CallOpts) (uint64, error
 	)
 	out := ret0
 	err := _Hermez.contract.Call(opts, out, "withdrawalDelay")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // WithdrawalDelay is a free data retrieval call binding the contract method 0xa7ab6961.
@@ -1238,7 +1239,7 @@ func (_Hermez *HermezFilterer) FilterAddToken(opts *bind.FilterOpts, tokenAddres
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "AddToken", tokenAddressRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezAddTokenIterator{contract: _Hermez.contract, event: "AddToken", logs: logs, sub: sub}, nil
 }
@@ -1255,7 +1256,7 @@ func (_Hermez *HermezFilterer) WatchAddToken(opts *bind.WatchOpts, sink chan<- *
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "AddToken", tokenAddressRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1265,19 +1266,19 @@ func (_Hermez *HermezFilterer) WatchAddToken(opts *bind.WatchOpts, sink chan<- *
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezAddToken)
 				if err := _Hermez.contract.UnpackLog(event, "AddToken", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1291,7 +1292,7 @@ func (_Hermez *HermezFilterer) WatchAddToken(opts *bind.WatchOpts, sink chan<- *
 func (_Hermez *HermezFilterer) ParseAddToken(log types.Log) (*HermezAddToken, error) {
 	event := new(HermezAddToken)
 	if err := _Hermez.contract.UnpackLog(event, "AddToken", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1381,7 +1382,7 @@ func (_Hermez *HermezFilterer) FilterForgeBatch(opts *bind.FilterOpts, batchNum
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "ForgeBatch", batchNumRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezForgeBatchIterator{contract: _Hermez.contract, event: "ForgeBatch", logs: logs, sub: sub}, nil
 }
@@ -1398,7 +1399,7 @@ func (_Hermez *HermezFilterer) WatchForgeBatch(opts *bind.WatchOpts, sink chan<-
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "ForgeBatch", batchNumRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1408,19 +1409,19 @@ func (_Hermez *HermezFilterer) WatchForgeBatch(opts *bind.WatchOpts, sink chan<-
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezForgeBatch)
 				if err := _Hermez.contract.UnpackLog(event, "ForgeBatch", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1434,7 +1435,7 @@ func (_Hermez *HermezFilterer) WatchForgeBatch(opts *bind.WatchOpts, sink chan<-
 func (_Hermez *HermezFilterer) ParseForgeBatch(log types.Log) (*HermezForgeBatch, error) {
 	event := new(HermezForgeBatch)
 	if err := _Hermez.contract.UnpackLog(event, "ForgeBatch", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1530,7 +1531,7 @@ func (_Hermez *HermezFilterer) FilterL1UserTxEvent(opts *bind.FilterOpts, queueI
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "L1UserTxEvent", queueIndexRule, positionRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezL1UserTxEventIterator{contract: _Hermez.contract, event: "L1UserTxEvent", logs: logs, sub: sub}, nil
 }
@@ -1551,7 +1552,7 @@ func (_Hermez *HermezFilterer) WatchL1UserTxEvent(opts *bind.WatchOpts, sink cha
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "L1UserTxEvent", queueIndexRule, positionRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1561,19 +1562,19 @@ func (_Hermez *HermezFilterer) WatchL1UserTxEvent(opts *bind.WatchOpts, sink cha
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezL1UserTxEvent)
 				if err := _Hermez.contract.UnpackLog(event, "L1UserTxEvent", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1587,7 +1588,7 @@ func (_Hermez *HermezFilterer) WatchL1UserTxEvent(opts *bind.WatchOpts, sink cha
 func (_Hermez *HermezFilterer) ParseL1UserTxEvent(log types.Log) (*HermezL1UserTxEvent, error) {
 	event := new(HermezL1UserTxEvent)
 	if err := _Hermez.contract.UnpackLog(event, "L1UserTxEvent", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1671,7 +1672,7 @@ func (_Hermez *HermezFilterer) FilterSafeMode(opts *bind.FilterOpts) (*HermezSaf
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "SafeMode")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezSafeModeIterator{contract: _Hermez.contract, event: "SafeMode", logs: logs, sub: sub}, nil
 }
@@ -1683,7 +1684,7 @@ func (_Hermez *HermezFilterer) WatchSafeMode(opts *bind.WatchOpts, sink chan<- *
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "SafeMode")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1693,19 +1694,19 @@ func (_Hermez *HermezFilterer) WatchSafeMode(opts *bind.WatchOpts, sink chan<- *
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezSafeMode)
 				if err := _Hermez.contract.UnpackLog(event, "SafeMode", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1719,7 +1720,7 @@ func (_Hermez *HermezFilterer) WatchSafeMode(opts *bind.WatchOpts, sink chan<- *
 func (_Hermez *HermezFilterer) ParseSafeMode(log types.Log) (*HermezSafeMode, error) {
 	event := new(HermezSafeMode)
 	if err := _Hermez.contract.UnpackLog(event, "SafeMode", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1815,7 +1816,7 @@ func (_Hermez *HermezFilterer) FilterUpdateBucketWithdraw(opts *bind.FilterOpts,
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "UpdateBucketWithdraw", numBucketRule, blockStampRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezUpdateBucketWithdrawIterator{contract: _Hermez.contract, event: "UpdateBucketWithdraw", logs: logs, sub: sub}, nil
 }
@@ -1836,7 +1837,7 @@ func (_Hermez *HermezFilterer) WatchUpdateBucketWithdraw(opts *bind.WatchOpts, s
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "UpdateBucketWithdraw", numBucketRule, blockStampRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1846,19 +1847,19 @@ func (_Hermez *HermezFilterer) WatchUpdateBucketWithdraw(opts *bind.WatchOpts, s
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezUpdateBucketWithdraw)
 				if err := _Hermez.contract.UnpackLog(event, "UpdateBucketWithdraw", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1872,7 +1873,7 @@ func (_Hermez *HermezFilterer) WatchUpdateBucketWithdraw(opts *bind.WatchOpts, s
 func (_Hermez *HermezFilterer) ParseUpdateBucketWithdraw(log types.Log) (*HermezUpdateBucketWithdraw, error) {
 	event := new(HermezUpdateBucketWithdraw)
 	if err := _Hermez.contract.UnpackLog(event, "UpdateBucketWithdraw", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1957,7 +1958,7 @@ func (_Hermez *HermezFilterer) FilterUpdateBucketsParameters(opts *bind.FilterOp
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "UpdateBucketsParameters")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezUpdateBucketsParametersIterator{contract: _Hermez.contract, event: "UpdateBucketsParameters", logs: logs, sub: sub}, nil
 }
@@ -1969,7 +1970,7 @@ func (_Hermez *HermezFilterer) WatchUpdateBucketsParameters(opts *bind.WatchOpts
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "UpdateBucketsParameters")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1979,19 +1980,19 @@ func (_Hermez *HermezFilterer) WatchUpdateBucketsParameters(opts *bind.WatchOpts
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezUpdateBucketsParameters)
 				if err := _Hermez.contract.UnpackLog(event, "UpdateBucketsParameters", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2005,7 +2006,7 @@ func (_Hermez *HermezFilterer) WatchUpdateBucketsParameters(opts *bind.WatchOpts
 func (_Hermez *HermezFilterer) ParseUpdateBucketsParameters(log types.Log) (*HermezUpdateBucketsParameters, error) {
 	event := new(HermezUpdateBucketsParameters)
 	if err := _Hermez.contract.UnpackLog(event, "UpdateBucketsParameters", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2090,7 +2091,7 @@ func (_Hermez *HermezFilterer) FilterUpdateFeeAddToken(opts *bind.FilterOpts) (*
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "UpdateFeeAddToken")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezUpdateFeeAddTokenIterator{contract: _Hermez.contract, event: "UpdateFeeAddToken", logs: logs, sub: sub}, nil
 }
@@ -2102,7 +2103,7 @@ func (_Hermez *HermezFilterer) WatchUpdateFeeAddToken(opts *bind.WatchOpts, sink
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "UpdateFeeAddToken")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2112,19 +2113,19 @@ func (_Hermez *HermezFilterer) WatchUpdateFeeAddToken(opts *bind.WatchOpts, sink
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezUpdateFeeAddToken)
 				if err := _Hermez.contract.UnpackLog(event, "UpdateFeeAddToken", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2138,7 +2139,7 @@ func (_Hermez *HermezFilterer) WatchUpdateFeeAddToken(opts *bind.WatchOpts, sink
 func (_Hermez *HermezFilterer) ParseUpdateFeeAddToken(log types.Log) (*HermezUpdateFeeAddToken, error) {
 	event := new(HermezUpdateFeeAddToken)
 	if err := _Hermez.contract.UnpackLog(event, "UpdateFeeAddToken", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2223,7 +2224,7 @@ func (_Hermez *HermezFilterer) FilterUpdateForgeL1L2BatchTimeout(opts *bind.Filt
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "UpdateForgeL1L2BatchTimeout")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezUpdateForgeL1L2BatchTimeoutIterator{contract: _Hermez.contract, event: "UpdateForgeL1L2BatchTimeout", logs: logs, sub: sub}, nil
 }
@@ -2235,7 +2236,7 @@ func (_Hermez *HermezFilterer) WatchUpdateForgeL1L2BatchTimeout(opts *bind.Watch
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "UpdateForgeL1L2BatchTimeout")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2245,19 +2246,19 @@ func (_Hermez *HermezFilterer) WatchUpdateForgeL1L2BatchTimeout(opts *bind.Watch
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezUpdateForgeL1L2BatchTimeout)
 				if err := _Hermez.contract.UnpackLog(event, "UpdateForgeL1L2BatchTimeout", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2271,7 +2272,7 @@ func (_Hermez *HermezFilterer) WatchUpdateForgeL1L2BatchTimeout(opts *bind.Watch
 func (_Hermez *HermezFilterer) ParseUpdateForgeL1L2BatchTimeout(log types.Log) (*HermezUpdateForgeL1L2BatchTimeout, error) {
 	event := new(HermezUpdateForgeL1L2BatchTimeout)
 	if err := _Hermez.contract.UnpackLog(event, "UpdateForgeL1L2BatchTimeout", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2357,7 +2358,7 @@ func (_Hermez *HermezFilterer) FilterUpdateTokenExchange(opts *bind.FilterOpts)
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "UpdateTokenExchange")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezUpdateTokenExchangeIterator{contract: _Hermez.contract, event: "UpdateTokenExchange", logs: logs, sub: sub}, nil
 }
@@ -2369,7 +2370,7 @@ func (_Hermez *HermezFilterer) WatchUpdateTokenExchange(opts *bind.WatchOpts, si
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "UpdateTokenExchange")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2379,19 +2380,19 @@ func (_Hermez *HermezFilterer) WatchUpdateTokenExchange(opts *bind.WatchOpts, si
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezUpdateTokenExchange)
 				if err := _Hermez.contract.UnpackLog(event, "UpdateTokenExchange", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2405,7 +2406,7 @@ func (_Hermez *HermezFilterer) WatchUpdateTokenExchange(opts *bind.WatchOpts, si
 func (_Hermez *HermezFilterer) ParseUpdateTokenExchange(log types.Log) (*HermezUpdateTokenExchange, error) {
 	event := new(HermezUpdateTokenExchange)
 	if err := _Hermez.contract.UnpackLog(event, "UpdateTokenExchange", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2490,7 +2491,7 @@ func (_Hermez *HermezFilterer) FilterUpdateWithdrawalDelay(opts *bind.FilterOpts
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "UpdateWithdrawalDelay")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezUpdateWithdrawalDelayIterator{contract: _Hermez.contract, event: "UpdateWithdrawalDelay", logs: logs, sub: sub}, nil
 }
@@ -2502,7 +2503,7 @@ func (_Hermez *HermezFilterer) WatchUpdateWithdrawalDelay(opts *bind.WatchOpts,
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "UpdateWithdrawalDelay")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2512,19 +2513,19 @@ func (_Hermez *HermezFilterer) WatchUpdateWithdrawalDelay(opts *bind.WatchOpts,
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezUpdateWithdrawalDelay)
 				if err := _Hermez.contract.UnpackLog(event, "UpdateWithdrawalDelay", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2538,7 +2539,7 @@ func (_Hermez *HermezFilterer) WatchUpdateWithdrawalDelay(opts *bind.WatchOpts,
 func (_Hermez *HermezFilterer) ParseUpdateWithdrawalDelay(log types.Log) (*HermezUpdateWithdrawalDelay, error) {
 	event := new(HermezUpdateWithdrawalDelay)
 	if err := _Hermez.contract.UnpackLog(event, "UpdateWithdrawalDelay", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -2638,7 +2639,7 @@ func (_Hermez *HermezFilterer) FilterWithdrawEvent(opts *bind.FilterOpts, idx []
 
 	logs, sub, err := _Hermez.contract.FilterLogs(opts, "WithdrawEvent", idxRule, numExitRootRule, instantWithdrawRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HermezWithdrawEventIterator{contract: _Hermez.contract, event: "WithdrawEvent", logs: logs, sub: sub}, nil
 }
@@ -2663,7 +2664,7 @@ func (_Hermez *HermezFilterer) WatchWithdrawEvent(opts *bind.WatchOpts, sink cha
 
 	logs, sub, err := _Hermez.contract.WatchLogs(opts, "WithdrawEvent", idxRule, numExitRootRule, instantWithdrawRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -2673,19 +2674,19 @@ func (_Hermez *HermezFilterer) WatchWithdrawEvent(opts *bind.WatchOpts, sink cha
 				// New log arrived, parse the event and forward to the user
 				event := new(HermezWithdrawEvent)
 				if err := _Hermez.contract.UnpackLog(event, "WithdrawEvent", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -2699,7 +2700,7 @@ func (_Hermez *HermezFilterer) WatchWithdrawEvent(opts *bind.WatchOpts, sink cha
 func (_Hermez *HermezFilterer) ParseWithdrawEvent(log types.Log) (*HermezWithdrawEvent, error) {
 	event := new(HermezWithdrawEvent)
 	if err := _Hermez.contract.UnpackLog(event, "WithdrawEvent", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }

eth/contracts/tokenHEZ/HEZ.go

@@ -13,6 +13,7 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/event"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -36,12 +37,12 @@ var HEZBin = "0x608060405234801561001057600080fd5b506040516111153803806111158339
 func DeployHEZ(auth *bind.TransactOpts, backend bind.ContractBackend, initialHolder common.Address) (common.Address, *types.Transaction, *HEZ, error) {
 	parsed, err := abi.JSON(strings.NewReader(HEZABI))
 	if err != nil {
-		return common.Address{}, nil, nil, err
+		return common.Address{}, nil, nil, tracerr.Wrap(err)
 	}
 
 	address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(HEZBin), backend, initialHolder)
 	if err != nil {
-		return common.Address{}, nil, nil, err
+		return common.Address{}, nil, nil, tracerr.Wrap(err)
 	}
 	return address, tx, &HEZ{HEZCaller: HEZCaller{contract: contract}, HEZTransactor: HEZTransactor{contract: contract}, HEZFilterer: HEZFilterer{contract: contract}}, nil
 }
@@ -109,7 +110,7 @@ type HEZTransactorRaw struct {
 func NewHEZ(address common.Address, backend bind.ContractBackend) (*HEZ, error) {
 	contract, err := bindHEZ(address, backend, backend, backend)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HEZ{HEZCaller: HEZCaller{contract: contract}, HEZTransactor: HEZTransactor{contract: contract}, HEZFilterer: HEZFilterer{contract: contract}}, nil
 }
@@ -118,7 +119,7 @@ func NewHEZ(address common.Address, backend bind.ContractBackend) (*HEZ, error)
 func NewHEZCaller(address common.Address, caller bind.ContractCaller) (*HEZCaller, error) {
 	contract, err := bindHEZ(address, caller, nil, nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HEZCaller{contract: contract}, nil
 }
@@ -127,7 +128,7 @@ func NewHEZCaller(address common.Address, caller bind.ContractCaller) (*HEZCalle
 func NewHEZTransactor(address common.Address, transactor bind.ContractTransactor) (*HEZTransactor, error) {
 	contract, err := bindHEZ(address, nil, transactor, nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HEZTransactor{contract: contract}, nil
 }
@@ -136,7 +137,7 @@ func NewHEZTransactor(address common.Address, transactor bind.ContractTransactor
 func NewHEZFilterer(address common.Address, filterer bind.ContractFilterer) (*HEZFilterer, error) {
 	contract, err := bindHEZ(address, nil, nil, filterer)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HEZFilterer{contract: contract}, nil
 }
@@ -145,7 +146,7 @@ func NewHEZFilterer(address common.Address, filterer bind.ContractFilterer) (*HE
 func bindHEZ(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
 	parsed, err := abi.JSON(strings.NewReader(HEZABI))
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
 }
@@ -197,7 +198,7 @@ func (_HEZ *HEZCaller) EIP712DOMAINHASH(opts *bind.CallOpts) ([32]byte, error) {
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "EIP712DOMAIN_HASH")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // EIP712DOMAINHASH is a free data retrieval call binding the contract method 0xc473af33.
@@ -223,7 +224,7 @@ func (_HEZ *HEZCaller) NAMEHASH(opts *bind.CallOpts) ([32]byte, error) {
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "NAME_HASH")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // NAMEHASH is a free data retrieval call binding the contract method 0x04622c2e.
@@ -249,7 +250,7 @@ func (_HEZ *HEZCaller) PERMITTYPEHASH(opts *bind.CallOpts) ([32]byte, error) {
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "PERMIT_TYPEHASH")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // PERMITTYPEHASH is a free data retrieval call binding the contract method 0x30adf81f.
@@ -275,7 +276,7 @@ func (_HEZ *HEZCaller) TRANSFERWITHAUTHORIZATIONTYPEHASH(opts *bind.CallOpts) ([
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "TRANSFER_WITH_AUTHORIZATION_TYPEHASH")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // TRANSFERWITHAUTHORIZATIONTYPEHASH is a free data retrieval call binding the contract method 0xa0cc6a68.
@@ -301,7 +302,7 @@ func (_HEZ *HEZCaller) VERSIONHASH(opts *bind.CallOpts) ([32]byte, error) {
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "VERSION_HASH")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // VERSIONHASH is a free data retrieval call binding the contract method 0x9e4e7318.
@@ -327,7 +328,7 @@ func (_HEZ *HEZCaller) Allowance(opts *bind.CallOpts, arg0 common.Address, arg1
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "allowance", arg0, arg1)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // Allowance is a free data retrieval call binding the contract method 0xdd62ed3e.
@@ -353,7 +354,7 @@ func (_HEZ *HEZCaller) AuthorizationState(opts *bind.CallOpts, arg0 common.Addre
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "authorizationState", arg0, arg1)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // AuthorizationState is a free data retrieval call binding the contract method 0xe94a0102.
@@ -379,7 +380,7 @@ func (_HEZ *HEZCaller) BalanceOf(opts *bind.CallOpts, arg0 common.Address) (*big
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "balanceOf", arg0)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // BalanceOf is a free data retrieval call binding the contract method 0x70a08231.
@@ -405,7 +406,7 @@ func (_HEZ *HEZCaller) Decimals(opts *bind.CallOpts) (uint8, error) {
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "decimals")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // Decimals is a free data retrieval call binding the contract method 0x313ce567.
@@ -431,7 +432,7 @@ func (_HEZ *HEZCaller) GetChainId(opts *bind.CallOpts) (*big.Int, error) {
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "getChainId")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetChainId is a free data retrieval call binding the contract method 0x3408e470.
@@ -457,7 +458,7 @@ func (_HEZ *HEZCaller) InitialBalance(opts *bind.CallOpts) (*big.Int, error) {
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "initialBalance")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // InitialBalance is a free data retrieval call binding the contract method 0x18369a2a.
@@ -483,7 +484,7 @@ func (_HEZ *HEZCaller) Name(opts *bind.CallOpts) (string, error) {
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "name")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // Name is a free data retrieval call binding the contract method 0x06fdde03.
@@ -509,7 +510,7 @@ func (_HEZ *HEZCaller) Nonces(opts *bind.CallOpts, arg0 common.Address) (*big.In
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "nonces", arg0)
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // Nonces is a free data retrieval call binding the contract method 0x7ecebe00.
@@ -535,7 +536,7 @@ func (_HEZ *HEZCaller) Symbol(opts *bind.CallOpts) (string, error) {
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "symbol")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // Symbol is a free data retrieval call binding the contract method 0x95d89b41.
@@ -561,7 +562,7 @@ func (_HEZ *HEZCaller) TotalSupply(opts *bind.CallOpts) (*big.Int, error) {
 	)
 	out := ret0
 	err := _HEZ.contract.Call(opts, out, "totalSupply")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // TotalSupply is a free data retrieval call binding the contract method 0x18160ddd.
@@ -795,7 +796,7 @@ func (_HEZ *HEZFilterer) FilterApproval(opts *bind.FilterOpts, owner []common.Ad
 
 	logs, sub, err := _HEZ.contract.FilterLogs(opts, "Approval", ownerRule, spenderRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HEZApprovalIterator{contract: _HEZ.contract, event: "Approval", logs: logs, sub: sub}, nil
 }
@@ -816,7 +817,7 @@ func (_HEZ *HEZFilterer) WatchApproval(opts *bind.WatchOpts, sink chan<- *HEZApp
 
 	logs, sub, err := _HEZ.contract.WatchLogs(opts, "Approval", ownerRule, spenderRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -826,19 +827,19 @@ func (_HEZ *HEZFilterer) WatchApproval(opts *bind.WatchOpts, sink chan<- *HEZApp
 				// New log arrived, parse the event and forward to the user
 				event := new(HEZApproval)
 				if err := _HEZ.contract.UnpackLog(event, "Approval", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -852,7 +853,7 @@ func (_HEZ *HEZFilterer) WatchApproval(opts *bind.WatchOpts, sink chan<- *HEZApp
 func (_HEZ *HEZFilterer) ParseApproval(log types.Log) (*HEZApproval, error) {
 	event := new(HEZApproval)
 	if err := _HEZ.contract.UnpackLog(event, "Approval", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -947,7 +948,7 @@ func (_HEZ *HEZFilterer) FilterAuthorizationUsed(opts *bind.FilterOpts, authoriz
 
 	logs, sub, err := _HEZ.contract.FilterLogs(opts, "AuthorizationUsed", authorizerRule, nonceRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HEZAuthorizationUsedIterator{contract: _HEZ.contract, event: "AuthorizationUsed", logs: logs, sub: sub}, nil
 }
@@ -968,7 +969,7 @@ func (_HEZ *HEZFilterer) WatchAuthorizationUsed(opts *bind.WatchOpts, sink chan<
 
 	logs, sub, err := _HEZ.contract.WatchLogs(opts, "AuthorizationUsed", authorizerRule, nonceRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -978,19 +979,19 @@ func (_HEZ *HEZFilterer) WatchAuthorizationUsed(opts *bind.WatchOpts, sink chan<
 				// New log arrived, parse the event and forward to the user
 				event := new(HEZAuthorizationUsed)
 				if err := _HEZ.contract.UnpackLog(event, "AuthorizationUsed", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1004,7 +1005,7 @@ func (_HEZ *HEZFilterer) WatchAuthorizationUsed(opts *bind.WatchOpts, sink chan<
 func (_HEZ *HEZFilterer) ParseAuthorizationUsed(log types.Log) (*HEZAuthorizationUsed, error) {
 	event := new(HEZAuthorizationUsed)
 	if err := _HEZ.contract.UnpackLog(event, "AuthorizationUsed", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1100,7 +1101,7 @@ func (_HEZ *HEZFilterer) FilterTransfer(opts *bind.FilterOpts, from []common.Add
 
 	logs, sub, err := _HEZ.contract.FilterLogs(opts, "Transfer", fromRule, toRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &HEZTransferIterator{contract: _HEZ.contract, event: "Transfer", logs: logs, sub: sub}, nil
 }
@@ -1121,7 +1122,7 @@ func (_HEZ *HEZFilterer) WatchTransfer(opts *bind.WatchOpts, sink chan<- *HEZTra
 
 	logs, sub, err := _HEZ.contract.WatchLogs(opts, "Transfer", fromRule, toRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1131,19 +1132,19 @@ func (_HEZ *HEZFilterer) WatchTransfer(opts *bind.WatchOpts, sink chan<- *HEZTra
 				// New log arrived, parse the event and forward to the user
 				event := new(HEZTransfer)
 				if err := _HEZ.contract.UnpackLog(event, "Transfer", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1157,7 +1158,7 @@ func (_HEZ *HEZFilterer) WatchTransfer(opts *bind.WatchOpts, sink chan<- *HEZTra
 func (_HEZ *HEZFilterer) ParseTransfer(log types.Log) (*HEZTransfer, error) {
 	event := new(HEZTransfer)
 	if err := _HEZ.contract.UnpackLog(event, "Transfer", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }

eth/contracts/withdrawdelayer/WithdrawalDelayer.go

@@ -13,6 +13,7 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/event"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -36,12 +37,12 @@ var WithdrawalDelayerBin = "0x608060405234801561001057600080fd5b50611be680610020
 func DeployWithdrawalDelayer(auth *bind.TransactOpts, backend bind.ContractBackend) (common.Address, *types.Transaction, *WithdrawalDelayer, error) {
 	parsed, err := abi.JSON(strings.NewReader(WithdrawalDelayerABI))
 	if err != nil {
-		return common.Address{}, nil, nil, err
+		return common.Address{}, nil, nil, tracerr.Wrap(err)
 	}
 
 	address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(WithdrawalDelayerBin), backend)
 	if err != nil {
-		return common.Address{}, nil, nil, err
+		return common.Address{}, nil, nil, tracerr.Wrap(err)
 	}
 	return address, tx, &WithdrawalDelayer{WithdrawalDelayerCaller: WithdrawalDelayerCaller{contract: contract}, WithdrawalDelayerTransactor: WithdrawalDelayerTransactor{contract: contract}, WithdrawalDelayerFilterer: WithdrawalDelayerFilterer{contract: contract}}, nil
 }
@@ -109,7 +110,7 @@ type WithdrawalDelayerTransactorRaw struct {
 func NewWithdrawalDelayer(address common.Address, backend bind.ContractBackend) (*WithdrawalDelayer, error) {
 	contract, err := bindWithdrawalDelayer(address, backend, backend, backend)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayer{WithdrawalDelayerCaller: WithdrawalDelayerCaller{contract: contract}, WithdrawalDelayerTransactor: WithdrawalDelayerTransactor{contract: contract}, WithdrawalDelayerFilterer: WithdrawalDelayerFilterer{contract: contract}}, nil
 }
@@ -118,7 +119,7 @@ func NewWithdrawalDelayer(address common.Address, backend bind.ContractBackend)
 func NewWithdrawalDelayerCaller(address common.Address, caller bind.ContractCaller) (*WithdrawalDelayerCaller, error) {
 	contract, err := bindWithdrawalDelayer(address, caller, nil, nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerCaller{contract: contract}, nil
 }
@@ -127,7 +128,7 @@ func NewWithdrawalDelayerCaller(address common.Address, caller bind.ContractCall
 func NewWithdrawalDelayerTransactor(address common.Address, transactor bind.ContractTransactor) (*WithdrawalDelayerTransactor, error) {
 	contract, err := bindWithdrawalDelayer(address, nil, transactor, nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerTransactor{contract: contract}, nil
 }
@@ -136,7 +137,7 @@ func NewWithdrawalDelayerTransactor(address common.Address, transactor bind.Cont
 func NewWithdrawalDelayerFilterer(address common.Address, filterer bind.ContractFilterer) (*WithdrawalDelayerFilterer, error) {
 	contract, err := bindWithdrawalDelayer(address, nil, nil, filterer)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerFilterer{contract: contract}, nil
 }
@@ -145,7 +146,7 @@ func NewWithdrawalDelayerFilterer(address common.Address, filterer bind.Contract
 func bindWithdrawalDelayer(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
 	parsed, err := abi.JSON(strings.NewReader(WithdrawalDelayerABI))
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
 }
@@ -197,7 +198,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) MAXEMERGENCYMODETIME(opts *bi
 	)
 	out := ret0
 	err := _WithdrawalDelayer.contract.Call(opts, out, "MAX_EMERGENCY_MODE_TIME")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // MAXEMERGENCYMODETIME is a free data retrieval call binding the contract method 0xb4b8e39d.
@@ -223,7 +224,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) MAXWITHDRAWALDELAY(opts *bind
 	)
 	out := ret0
 	err := _WithdrawalDelayer.contract.Call(opts, out, "MAX_WITHDRAWAL_DELAY")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // MAXWITHDRAWALDELAY is a free data retrieval call binding the contract method 0xa238f9df.
@@ -253,7 +254,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) DepositInfo(opts *bind.CallOp
 		ret1,
 	}
 	err := _WithdrawalDelayer.contract.Call(opts, out, "depositInfo", _owner, _token)
-	return *ret0, *ret1, err
+	return *ret0, *ret1, tracerr.Wrap(err)
 }
 
 // DepositInfo is a free data retrieval call binding the contract method 0x493b0170.
@@ -283,7 +284,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) Deposits(opts *bind.CallOpts,
 	})
 	out := ret
 	err := _WithdrawalDelayer.contract.Call(opts, out, "deposits", arg0)
-	return *ret, err
+	return *ret, tracerr.Wrap(err)
 }
 
 // Deposits is a free data retrieval call binding the contract method 0x3d4dff7b.
@@ -315,7 +316,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) GetEmergencyModeStartingTime(
 	)
 	out := ret0
 	err := _WithdrawalDelayer.contract.Call(opts, out, "getEmergencyModeStartingTime")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetEmergencyModeStartingTime is a free data retrieval call binding the contract method 0x668cdd67.
@@ -341,7 +342,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) GetHermezGovernanceDAOAddress
 	)
 	out := ret0
 	err := _WithdrawalDelayer.contract.Call(opts, out, "getHermezGovernanceDAOAddress")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetHermezGovernanceDAOAddress is a free data retrieval call binding the contract method 0x580fc611.
@@ -367,7 +368,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) GetHermezKeeperAddress(opts *
 	)
 	out := ret0
 	err := _WithdrawalDelayer.contract.Call(opts, out, "getHermezKeeperAddress")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetHermezKeeperAddress is a free data retrieval call binding the contract method 0x305887f9.
@@ -393,7 +394,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) GetWhiteHackGroupAddress(opts
 	)
 	out := ret0
 	err := _WithdrawalDelayer.contract.Call(opts, out, "getWhiteHackGroupAddress")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetWhiteHackGroupAddress is a free data retrieval call binding the contract method 0xae7efbbd.
@@ -419,7 +420,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) GetWithdrawalDelay(opts *bind
 	)
 	out := ret0
 	err := _WithdrawalDelayer.contract.Call(opts, out, "getWithdrawalDelay")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // GetWithdrawalDelay is a free data retrieval call binding the contract method 0x03160940.
@@ -445,7 +446,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) HermezRollupAddress(opts *bin
 	)
 	out := ret0
 	err := _WithdrawalDelayer.contract.Call(opts, out, "hermezRollupAddress")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // HermezRollupAddress is a free data retrieval call binding the contract method 0x0fd266d7.
@@ -471,7 +472,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerCaller) IsEmergencyMode(opts *bind.Ca
 	)
 	out := ret0
 	err := _WithdrawalDelayer.contract.Call(opts, out, "isEmergencyMode")
-	return *ret0, err
+	return *ret0, tracerr.Wrap(err)
 }
 
 // IsEmergencyMode is a free data retrieval call binding the contract method 0x20a194b8.
@@ -769,7 +770,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) FilterDeposit(opts *bind.Fi
 
 	logs, sub, err := _WithdrawalDelayer.contract.FilterLogs(opts, "Deposit", ownerRule, tokenRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerDepositIterator{contract: _WithdrawalDelayer.contract, event: "Deposit", logs: logs, sub: sub}, nil
 }
@@ -790,7 +791,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchDeposit(opts *bind.Wat
 
 	logs, sub, err := _WithdrawalDelayer.contract.WatchLogs(opts, "Deposit", ownerRule, tokenRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -800,19 +801,19 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchDeposit(opts *bind.Wat
 				// New log arrived, parse the event and forward to the user
 				event := new(WithdrawalDelayerDeposit)
 				if err := _WithdrawalDelayer.contract.UnpackLog(event, "Deposit", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -826,7 +827,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchDeposit(opts *bind.Wat
 func (_WithdrawalDelayer *WithdrawalDelayerFilterer) ParseDeposit(log types.Log) (*WithdrawalDelayerDeposit, error) {
 	event := new(WithdrawalDelayerDeposit)
 	if err := _WithdrawalDelayer.contract.UnpackLog(event, "Deposit", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -910,7 +911,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) FilterEmergencyModeEnabled(
 
 	logs, sub, err := _WithdrawalDelayer.contract.FilterLogs(opts, "EmergencyModeEnabled")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerEmergencyModeEnabledIterator{contract: _WithdrawalDelayer.contract, event: "EmergencyModeEnabled", logs: logs, sub: sub}, nil
 }
@@ -922,7 +923,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchEmergencyModeEnabled(o
 
 	logs, sub, err := _WithdrawalDelayer.contract.WatchLogs(opts, "EmergencyModeEnabled")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -932,19 +933,19 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchEmergencyModeEnabled(o
 				// New log arrived, parse the event and forward to the user
 				event := new(WithdrawalDelayerEmergencyModeEnabled)
 				if err := _WithdrawalDelayer.contract.UnpackLog(event, "EmergencyModeEnabled", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -958,7 +959,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchEmergencyModeEnabled(o
 func (_WithdrawalDelayer *WithdrawalDelayerFilterer) ParseEmergencyModeEnabled(log types.Log) (*WithdrawalDelayerEmergencyModeEnabled, error) {
 	event := new(WithdrawalDelayerEmergencyModeEnabled)
 	if err := _WithdrawalDelayer.contract.UnpackLog(event, "EmergencyModeEnabled", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1059,7 +1060,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) FilterEscapeHatchWithdrawal
 
 	logs, sub, err := _WithdrawalDelayer.contract.FilterLogs(opts, "EscapeHatchWithdrawal", whoRule, toRule, tokenRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerEscapeHatchWithdrawalIterator{contract: _WithdrawalDelayer.contract, event: "EscapeHatchWithdrawal", logs: logs, sub: sub}, nil
 }
@@ -1084,7 +1085,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchEscapeHatchWithdrawal(
 
 	logs, sub, err := _WithdrawalDelayer.contract.WatchLogs(opts, "EscapeHatchWithdrawal", whoRule, toRule, tokenRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1094,19 +1095,19 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchEscapeHatchWithdrawal(
 				// New log arrived, parse the event and forward to the user
 				event := new(WithdrawalDelayerEscapeHatchWithdrawal)
 				if err := _WithdrawalDelayer.contract.UnpackLog(event, "EscapeHatchWithdrawal", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1120,7 +1121,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchEscapeHatchWithdrawal(
 func (_WithdrawalDelayer *WithdrawalDelayerFilterer) ParseEscapeHatchWithdrawal(log types.Log) (*WithdrawalDelayerEscapeHatchWithdrawal, error) {
 	event := new(WithdrawalDelayerEscapeHatchWithdrawal)
 	if err := _WithdrawalDelayer.contract.UnpackLog(event, "EscapeHatchWithdrawal", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1205,7 +1206,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) FilterNewHermezGovernanceDA
 
 	logs, sub, err := _WithdrawalDelayer.contract.FilterLogs(opts, "NewHermezGovernanceDAOAddress")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerNewHermezGovernanceDAOAddressIterator{contract: _WithdrawalDelayer.contract, event: "NewHermezGovernanceDAOAddress", logs: logs, sub: sub}, nil
 }
@@ -1217,7 +1218,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewHermezGovernanceDAO
 
 	logs, sub, err := _WithdrawalDelayer.contract.WatchLogs(opts, "NewHermezGovernanceDAOAddress")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1227,19 +1228,19 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewHermezGovernanceDAO
 				// New log arrived, parse the event and forward to the user
 				event := new(WithdrawalDelayerNewHermezGovernanceDAOAddress)
 				if err := _WithdrawalDelayer.contract.UnpackLog(event, "NewHermezGovernanceDAOAddress", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1253,7 +1254,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewHermezGovernanceDAO
 func (_WithdrawalDelayer *WithdrawalDelayerFilterer) ParseNewHermezGovernanceDAOAddress(log types.Log) (*WithdrawalDelayerNewHermezGovernanceDAOAddress, error) {
 	event := new(WithdrawalDelayerNewHermezGovernanceDAOAddress)
 	if err := _WithdrawalDelayer.contract.UnpackLog(event, "NewHermezGovernanceDAOAddress", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1338,7 +1339,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) FilterNewHermezKeeperAddres
 
 	logs, sub, err := _WithdrawalDelayer.contract.FilterLogs(opts, "NewHermezKeeperAddress")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerNewHermezKeeperAddressIterator{contract: _WithdrawalDelayer.contract, event: "NewHermezKeeperAddress", logs: logs, sub: sub}, nil
 }
@@ -1350,7 +1351,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewHermezKeeperAddress
 
 	logs, sub, err := _WithdrawalDelayer.contract.WatchLogs(opts, "NewHermezKeeperAddress")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1360,19 +1361,19 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewHermezKeeperAddress
 				// New log arrived, parse the event and forward to the user
 				event := new(WithdrawalDelayerNewHermezKeeperAddress)
 				if err := _WithdrawalDelayer.contract.UnpackLog(event, "NewHermezKeeperAddress", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1386,7 +1387,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewHermezKeeperAddress
 func (_WithdrawalDelayer *WithdrawalDelayerFilterer) ParseNewHermezKeeperAddress(log types.Log) (*WithdrawalDelayerNewHermezKeeperAddress, error) {
 	event := new(WithdrawalDelayerNewHermezKeeperAddress)
 	if err := _WithdrawalDelayer.contract.UnpackLog(event, "NewHermezKeeperAddress", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1471,7 +1472,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) FilterNewWhiteHackGroupAddr
 
 	logs, sub, err := _WithdrawalDelayer.contract.FilterLogs(opts, "NewWhiteHackGroupAddress")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerNewWhiteHackGroupAddressIterator{contract: _WithdrawalDelayer.contract, event: "NewWhiteHackGroupAddress", logs: logs, sub: sub}, nil
 }
@@ -1483,7 +1484,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewWhiteHackGroupAddre
 
 	logs, sub, err := _WithdrawalDelayer.contract.WatchLogs(opts, "NewWhiteHackGroupAddress")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1493,19 +1494,19 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewWhiteHackGroupAddre
 				// New log arrived, parse the event and forward to the user
 				event := new(WithdrawalDelayerNewWhiteHackGroupAddress)
 				if err := _WithdrawalDelayer.contract.UnpackLog(event, "NewWhiteHackGroupAddress", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1519,7 +1520,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewWhiteHackGroupAddre
 func (_WithdrawalDelayer *WithdrawalDelayerFilterer) ParseNewWhiteHackGroupAddress(log types.Log) (*WithdrawalDelayerNewWhiteHackGroupAddress, error) {
 	event := new(WithdrawalDelayerNewWhiteHackGroupAddress)
 	if err := _WithdrawalDelayer.contract.UnpackLog(event, "NewWhiteHackGroupAddress", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1604,7 +1605,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) FilterNewWithdrawalDelay(op
 
 	logs, sub, err := _WithdrawalDelayer.contract.FilterLogs(opts, "NewWithdrawalDelay")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerNewWithdrawalDelayIterator{contract: _WithdrawalDelayer.contract, event: "NewWithdrawalDelay", logs: logs, sub: sub}, nil
 }
@@ -1616,7 +1617,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewWithdrawalDelay(opt
 
 	logs, sub, err := _WithdrawalDelayer.contract.WatchLogs(opts, "NewWithdrawalDelay")
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1626,19 +1627,19 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewWithdrawalDelay(opt
 				// New log arrived, parse the event and forward to the user
 				event := new(WithdrawalDelayerNewWithdrawalDelay)
 				if err := _WithdrawalDelayer.contract.UnpackLog(event, "NewWithdrawalDelay", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1652,7 +1653,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchNewWithdrawalDelay(opt
 func (_WithdrawalDelayer *WithdrawalDelayerFilterer) ParseNewWithdrawalDelay(log types.Log) (*WithdrawalDelayerNewWithdrawalDelay, error) {
 	event := new(WithdrawalDelayerNewWithdrawalDelay)
 	if err := _WithdrawalDelayer.contract.UnpackLog(event, "NewWithdrawalDelay", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }
@@ -1748,7 +1749,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) FilterWithdraw(opts *bind.F
 
 	logs, sub, err := _WithdrawalDelayer.contract.FilterLogs(opts, "Withdraw", tokenRule, ownerRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WithdrawalDelayerWithdrawIterator{contract: _WithdrawalDelayer.contract, event: "Withdraw", logs: logs, sub: sub}, nil
 }
@@ -1769,7 +1770,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchWithdraw(opts *bind.Wa
 
 	logs, sub, err := _WithdrawalDelayer.contract.WatchLogs(opts, "Withdraw", tokenRule, ownerRule)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event.NewSubscription(func(quit <-chan struct{}) error {
 		defer sub.Unsubscribe()
@@ -1779,19 +1780,19 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchWithdraw(opts *bind.Wa
 				// New log arrived, parse the event and forward to the user
 				event := new(WithdrawalDelayerWithdraw)
 				if err := _WithdrawalDelayer.contract.UnpackLog(event, "Withdraw", log); err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				event.Raw = log
 
 				select {
 				case sink <- event:
 				case err := <-sub.Err():
-					return err
+					return tracerr.Wrap(err)
 				case <-quit:
 					return nil
 				}
 			case err := <-sub.Err():
-				return err
+				return tracerr.Wrap(err)
 			case <-quit:
 				return nil
 			}
@@ -1805,7 +1806,7 @@ func (_WithdrawalDelayer *WithdrawalDelayerFilterer) WatchWithdraw(opts *bind.Wa
 func (_WithdrawalDelayer *WithdrawalDelayerFilterer) ParseWithdraw(log types.Log) (*WithdrawalDelayerWithdraw, error) {
 	event := new(WithdrawalDelayerWithdraw)
 	if err := _WithdrawalDelayer.contract.UnpackLog(event, "Withdraw", log); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return event, nil
 }

eth/ethereum.go

@@ -15,6 +15,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/common"
 	HEZ "github.com/hermeznetwork/hermez-node/eth/contracts/tokenHEZ"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // ERC20Consts are the constants defined in a particular ERC20 Token instance
@@ -105,7 +106,7 @@ func (c *EthereumClient) Account() *accounts.Account {
 // EthAddress returns the ethereum address of the account loaded into the EthereumClient
 func (c *EthereumClient) EthAddress() (*ethCommon.Address, error) {
 	if c.account == nil {
-		return nil, ErrAccountNil
+		return nil, tracerr.Wrap(ErrAccountNil)
 	}
 	return &c.account.Address, nil
 }
@@ -116,12 +117,12 @@ func (c *EthereumClient) EthAddress() (*ethCommon.Address, error) {
 func (c *EthereumClient) CallAuth(gasLimit uint64,
 	fn func(*ethclient.Client, *bind.TransactOpts) (*types.Transaction, error)) (*types.Transaction, error) {
 	if c.account == nil {
-		return nil, ErrAccountNil
+		return nil, tracerr.Wrap(ErrAccountNil)
 	}
 
 	gasPrice, err := c.client.SuggestGasPrice(context.Background())
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	inc := new(big.Int).Set(gasPrice)
 	inc.Div(inc, new(big.Int).SetUint64(c.config.GasPriceDiv))
@@ -130,7 +131,7 @@ func (c *EthereumClient) CallAuth(gasLimit uint64,
 
 	auth, err := bind.NewKeyStoreTransactor(c.ks, *c.account)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	auth.Value = big.NewInt(0) // in wei
 	if gasLimit == 0 {
@@ -144,7 +145,7 @@ func (c *EthereumClient) CallAuth(gasLimit uint64,
 	if tx != nil {
 		log.Debugw("Transaction", "tx", tx.Hash().Hex(), "nonce", tx.Nonce())
 	}
-	return tx, err
+	return tx, tracerr.Wrap(err)
 }
 
 // ContractData contains the contract data
@@ -167,20 +168,20 @@ func (c *EthereumClient) Deploy(name string,
 		func(client *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
 			addr, tx, _, err := fn(client, auth)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			contractData.Address = addr
 			return tx, nil
 		},
 	)
 	if err != nil {
-		return contractData, fmt.Errorf(errStrDeploy, name, err)
+		return contractData, tracerr.Wrap(fmt.Errorf(errStrDeploy, name, err))
 	}
 	log.Infow("Waiting receipt", "tx", tx.Hash().Hex(), "contract", name)
 	contractData.Tx = tx
 	receipt, err := c.WaitReceipt(tx)
 	if err != nil {
-		return contractData, fmt.Errorf(errStrWaitReceipt, name, err)
+		return contractData, tracerr.Wrap(fmt.Errorf(errStrWaitReceipt, name, err))
 	}
 	contractData.Receipt = receipt
 	return contractData, nil
@@ -229,16 +230,16 @@ func (c *EthereumClient) waitReceipt(ctx context.Context, tx *types.Transaction,
 
 	if receipt != nil && receipt.Status == types.ReceiptStatusFailed {
 		log.Errorw("Failed transaction", "tx", txHash.Hex())
-		return receipt, ErrReceiptStatusFailed
+		return receipt, tracerr.Wrap(ErrReceiptStatusFailed)
 	}
 
 	if receipt == nil {
 		log.Debugw("Pendingtransaction / Wait receipt timeout", "tx", txHash.Hex(), "lasterr", err)
-		return receipt, ErrReceiptNotReceived
+		return receipt, tracerr.Wrap(ErrReceiptNotReceived)
 	}
 	log.Debugw("Successful transaction", "tx", txHash.Hex())
 
-	return receipt, err
+	return receipt, tracerr.Wrap(err)
 }
 
 // EthLastBlock returns the last block number in the blockchain
@@ -247,7 +248,7 @@ func (c *EthereumClient) EthLastBlock() (int64, error) {
 	defer cancel()
 	header, err := c.client.HeaderByNumber(ctx, nil)
 	if err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	return header.Number.Int64(), nil
 }
@@ -266,7 +267,7 @@ func (c *EthereumClient) EthBlockByNumber(ctx context.Context, number int64) (*c
 	}
 	block, err := c.client.BlockByNumber(ctx, blockNum)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	b := &common.Block{
 		Num:        block.Number().Int64(),
@@ -283,21 +284,21 @@ func (c *EthereumClient) EthERC20Consts(tokenAddress ethCommon.Address) (*ERC20C
 	// ERC20, which allows us to access the standard ERC20 constants.
 	instance, err := HEZ.NewHEZ(tokenAddress, c.client)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	name, err := instance.Name(nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	symbol, err := instance.Symbol(nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	decimals, err := instance.Decimals(nil)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &ERC20Consts{
 		Name:     name,

eth/rollup.go

@@ -17,6 +17,7 @@ import (
 	Hermez "github.com/hermeznetwork/hermez-node/eth/contracts/hermez"
 	HEZ "github.com/hermeznetwork/hermez-node/eth/contracts/tokenHEZ"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
@@ -202,19 +203,19 @@ type RollupClient struct {
 func NewRollupClient(client *EthereumClient, address ethCommon.Address, tokenHEZCfg TokenConfig) (*RollupClient, error) {
 	contractAbi, err := abi.JSON(strings.NewReader(string(Hermez.HermezABI)))
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	hermez, err := Hermez.NewHermez(address, client.Client())
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	tokenHEZ, err := HEZ.NewHEZ(tokenHEZCfg.Address, client.Client())
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	chainID, err := client.client.ChainID(context.Background())
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &RollupClient{
 		client:      client,
@@ -234,7 +235,7 @@ func (c *RollupClient) RollupForgeBatch(args *RollupForgeBatchArgs) (tx *types.T
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
 			rollupConst, err := c.RollupConstants()
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			nLevels := rollupConst.Verifiers[args.VerifierIdx].NLevels
 			lenBytes := nLevels / 8 //nolint:gomnd
@@ -244,7 +245,7 @@ func (c *RollupClient) RollupForgeBatch(args *RollupForgeBatchArgs) (tx *types.T
 				l1 := args.L1CoordinatorTxs[i]
 				bytesl1, err := l1.BytesCoordinatorTx(args.L1CoordinatorTxsAuths[i])
 				if err != nil {
-					return nil, err
+					return nil, tracerr.Wrap(err)
 				}
 				l1CoordinatorBytes = append(l1CoordinatorBytes, bytesl1[:]...)
 			}
@@ -253,14 +254,14 @@ func (c *RollupClient) RollupForgeBatch(args *RollupForgeBatchArgs) (tx *types.T
 				l2 := args.L2TxsData[i]
 				bytesl2, err := l2.BytesDataAvailability(uint32(nLevels))
 				if err != nil {
-					return nil, err
+					return nil, tracerr.Wrap(err)
 				}
 				l2DataBytes = append(l2DataBytes, bytesl2[:]...)
 			}
 			var feeIdxCoordinator []byte
 			if len(args.FeeIdxCoordinator) > common.RollupConstMaxFeeIdxCoordinator {
-				return nil, fmt.Errorf("len(args.FeeIdxCoordinator) > %v",
+				return nil, tracerr.Wrap(fmt.Errorf("len(args.FeeIdxCoordinator) > %v",
-					common.RollupConstMaxFeeIdxCoordinator)
+					common.RollupConstMaxFeeIdxCoordinator))
 			}
 			for i := 0; i < common.RollupConstMaxFeeIdxCoordinator; i++ {
 				feeIdx := common.Idx(0)
@@ -269,14 +270,14 @@ func (c *RollupClient) RollupForgeBatch(args *RollupForgeBatchArgs) (tx *types.T
 				}
 				bytesFeeIdx, err := feeIdx.Bytes()
 				if err != nil {
-					return nil, err
+					return nil, tracerr.Wrap(err)
 				}
 				feeIdxCoordinator = append(feeIdxCoordinator, bytesFeeIdx[len(bytesFeeIdx)-int(lenBytes):]...)
 			}
 			return c.hermez.ForgeBatch(auth, newLastIdx, args.NewStRoot, args.NewExitRoot, l1CoordinatorBytes, l2DataBytes, feeIdxCoordinator, args.VerifierIdx, args.L1Batch, args.ProofA, args.ProofB, args.ProofC)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed forge batch: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed forge batch: %w", err))
 	}
 	return tx, nil
 }
@@ -292,7 +293,7 @@ func (c *RollupClient) RollupAddToken(tokenAddress ethCommon.Address, feeAddToke
 			spender := c.address
 			nonce, err := c.tokenHEZ.Nonces(nil, owner)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			tokenName := c.tokenHEZCfg.Name
 			tokenAddr := c.tokenHEZCfg.Address
@@ -303,7 +304,7 @@ func (c *RollupClient) RollupAddToken(tokenAddress ethCommon.Address, feeAddToke
 			return c.hermez.AddToken(auth, tokenAddress, permit)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed add Token %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed add Token %w", err))
 	}
 	return tx, nil
 }
@@ -321,7 +322,7 @@ func (c *RollupClient) RollupWithdrawMerkleProof(fromBJJ *babyjub.PublicKey, tok
 			return c.hermez.WithdrawMerkleProof(auth, tokenID, amount, babyPubKey, numExitRootB, siblings, idxBig, instantWithdraw)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed update WithdrawMerkleProof: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed update WithdrawMerkleProof: %w", err))
 	}
 	return tx, nil
 }
@@ -329,7 +330,7 @@ func (c *RollupClient) RollupWithdrawMerkleProof(fromBJJ *babyjub.PublicKey, tok
 // RollupWithdrawCircuit is the interface to call the smart contract function
 func (c *RollupClient) RollupWithdrawCircuit(proofA, proofC [2]*big.Int, proofB [2][2]*big.Int, tokenID uint32, numExitRoot, idx int64, amount *big.Int, instantWithdraw bool) (*types.Transaction, error) {
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // RollupL1UserTxERC20ETH is the interface to call the smart contract function
@@ -344,11 +345,11 @@ func (c *RollupClient) RollupL1UserTxERC20ETH(fromBJJ *babyjub.PublicKey, fromId
 			toIdxBig := big.NewInt(toIdx)
 			loadAmountF, err := common.NewFloat16(loadAmount)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			amountF, err := common.NewFloat16(amount)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			if tokenID == 0 {
 				auth.Value = loadAmount
@@ -358,7 +359,7 @@ func (c *RollupClient) RollupL1UserTxERC20ETH(fromBJJ *babyjub.PublicKey, fromId
 				uint16(amountF), tokenID, toIdxBig, permit)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed add L1 Tx ERC20/ETH: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed add L1 Tx ERC20/ETH: %w", err))
 	}
 	return tx, nil
 }
@@ -375,11 +376,11 @@ func (c *RollupClient) RollupL1UserTxERC20Permit(fromBJJ *babyjub.PublicKey, fro
 			toIdxBig := big.NewInt(toIdx)
 			loadAmountF, err := common.NewFloat16(loadAmount)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			amountF, err := common.NewFloat16(amount)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			if tokenID == 0 {
 				auth.Value = loadAmount
@@ -388,7 +389,7 @@ func (c *RollupClient) RollupL1UserTxERC20Permit(fromBJJ *babyjub.PublicKey, fro
 			spender := c.address
 			nonce, err := c.tokenHEZ.Nonces(nil, owner)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			tokenName := c.tokenHEZCfg.Name
 			tokenAddr := c.tokenHEZCfg.Address
@@ -399,7 +400,7 @@ func (c *RollupClient) RollupL1UserTxERC20Permit(fromBJJ *babyjub.PublicKey, fro
 				uint16(amountF), tokenID, toIdxBig, permit)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed add L1 Tx ERC20Permit: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed add L1 Tx ERC20Permit: %w", err))
 	}
 	return tx, nil
 }
@@ -408,9 +409,9 @@ func (c *RollupClient) RollupL1UserTxERC20Permit(fromBJJ *babyjub.PublicKey, fro
 func (c *RollupClient) RollupRegisterTokensCount() (registerTokensCount *big.Int, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		registerTokensCount, err = c.hermez.RegisterTokensCount(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return registerTokensCount, nil
 }
@@ -420,9 +421,9 @@ func (c *RollupClient) RollupLastForgedBatch() (lastForgedBatch int64, err error
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		_lastForgedBatch, err := c.hermez.LastForgedBatch(nil)
 		lastForgedBatch = int64(_lastForgedBatch)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 	return lastForgedBatch, nil
 }
@@ -435,7 +436,7 @@ func (c *RollupClient) RollupUpdateForgeL1L2BatchTimeout(newForgeL1L2BatchTimeou
 			return c.hermez.UpdateForgeL1L2BatchTimeout(auth, uint8(newForgeL1L2BatchTimeout))
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed update ForgeL1L2BatchTimeout: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed update ForgeL1L2BatchTimeout: %w", err))
 	}
 	return tx, nil
 }
@@ -448,7 +449,7 @@ func (c *RollupClient) RollupUpdateFeeAddToken(newFeeAddToken *big.Int) (tx *typ
 			return c.hermez.UpdateFeeAddToken(auth, newFeeAddToken)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed update FeeAddToken: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed update FeeAddToken: %w", err))
 	}
 	return tx, nil
 }
@@ -459,18 +460,18 @@ func (c *RollupClient) RollupConstants() (rollupConstants *common.RollupConstant
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		absoluteMaxL1L2BatchTimeout, err := c.hermez.ABSOLUTEMAXL1L2BATCHTIMEOUT(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		rollupConstants.AbsoluteMaxL1L2BatchTimeout = int64(absoluteMaxL1L2BatchTimeout)
 		rollupConstants.TokenHEZ, err = c.hermez.TokenHEZ(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		for i := int64(0); i < int64(common.LenVerifiers); i++ {
 			var newRollupVerifier common.RollupVerifierStruct
 			rollupVerifier, err := c.hermez.RollupVerifiers(nil, big.NewInt(i))
 			if err != nil {
-				return err
+				return tracerr.Wrap(err)
 			}
 			newRollupVerifier.MaxTx = rollupVerifier.MaxTx.Int64()
 			newRollupVerifier.NLevels = rollupVerifier.NLevels.Int64()
@@ -478,20 +479,20 @@ func (c *RollupClient) RollupConstants() (rollupConstants *common.RollupConstant
 		}
 		rollupConstants.HermezAuctionContract, err = c.hermez.HermezAuctionContract(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		rollupConstants.HermezGovernanceDAOAddress, err = c.hermez.HermezGovernanceDAOAddress(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		rollupConstants.SafetyAddress, err = c.hermez.SafetyAddress(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		rollupConstants.WithdrawDelayerContract, err = c.hermez.WithdrawDelayerContract(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return rollupConstants, nil
 }
@@ -521,7 +522,7 @@ func (c *RollupClient) RollupEventsByBlock(blockNum int64) (*RollupEvents, *ethC
 	}
 	logs, err := c.client.client.FilterLogs(context.Background(), query)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	if len(logs) > 0 {
 		blockHash = &logs[0].BlockHash
@@ -529,7 +530,7 @@ func (c *RollupClient) RollupEventsByBlock(blockNum int64) (*RollupEvents, *ethC
 	for _, vLog := range logs {
 		if vLog.BlockHash != *blockHash {
 			log.Errorw("Block hash mismatch", "expected", blockHash.String(), "got", vLog.BlockHash.String())
-			return nil, nil, ErrBlockHashMismatchEvent
+			return nil, nil, tracerr.Wrap(ErrBlockHashMismatchEvent)
 		}
 		switch vLog.Topics[0] {
 		case logHermezL1UserTxEvent:
@@ -537,11 +538,11 @@ func (c *RollupClient) RollupEventsByBlock(blockNum int64) (*RollupEvents, *ethC
 			var L1UserTx RollupEventL1UserTx
 			err := c.contractAbi.Unpack(&L1UserTxAux, "L1UserTxEvent", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			L1Tx, err := common.L1UserTxFromBytes(L1UserTxAux.L1UserTx)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			toForgeL1TxsNum := new(big.Int).SetBytes(vLog.Topics[1][:]).Int64()
 			L1Tx.ToForgeL1TxsNum = &toForgeL1TxsNum
@@ -553,7 +554,7 @@ func (c *RollupClient) RollupEventsByBlock(blockNum int64) (*RollupEvents, *ethC
 			var addToken RollupEventAddToken
 			err := c.contractAbi.Unpack(&addToken, "AddToken", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			addToken.TokenAddress = ethCommon.BytesToAddress(vLog.Topics[1].Bytes())
 			rollupEvents.AddToken = append(rollupEvents.AddToken, addToken)
@@ -569,7 +570,7 @@ func (c *RollupClient) RollupEventsByBlock(blockNum int64) (*RollupEvents, *ethC
 			}
 			err := c.contractAbi.Unpack(&updateForgeL1L2BatchTimeout, "UpdateForgeL1L2BatchTimeout", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			rollupEvents.UpdateForgeL1L2BatchTimeout = append(rollupEvents.UpdateForgeL1L2BatchTimeout,
 				RollupEventUpdateForgeL1L2BatchTimeout{
@@ -579,7 +580,7 @@ func (c *RollupClient) RollupEventsByBlock(blockNum int64) (*RollupEvents, *ethC
 			var updateFeeAddToken RollupEventUpdateFeeAddToken
 			err := c.contractAbi.Unpack(&updateFeeAddToken, "UpdateFeeAddToken", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			rollupEvents.UpdateFeeAddToken = append(rollupEvents.UpdateFeeAddToken, updateFeeAddToken)
 		case logHermezWithdrawEvent:
@@ -602,25 +603,25 @@ func (c *RollupClient) RollupEventsByBlock(blockNum int64) (*RollupEvents, *ethC
 func (c *RollupClient) RollupForgeBatchArgs(ethTxHash ethCommon.Hash) (*RollupForgeBatchArgs, *ethCommon.Address, error) {
 	tx, _, err := c.client.client.TransactionByHash(context.Background(), ethTxHash)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	txData := tx.Data()
 
 	method, err := c.contractAbi.MethodById(txData[:4])
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	receipt, err := c.client.client.TransactionReceipt(context.Background(), ethTxHash)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	sender, err := c.client.client.TransactionSender(context.Background(), tx, receipt.Logs[0].BlockHash, receipt.Logs[0].Index)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	var aux RollupForgeBatchArgsAux
 	if err := method.Inputs.Unpack(&aux, txData[4:]); err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	rollupForgeBatchArgs := RollupForgeBatchArgs{
 		L1Batch:               aux.L1Batch,
@@ -648,14 +649,14 @@ func (c *RollupClient) RollupForgeBatchArgs(ethTxHash ethCommon.Hash) (*RollupFo
 		signature = append(signature, v)
 		l1Tx, err := common.L1CoordinatorTxFromBytes(bytesL1Coordinator, c.chainID, c.address)
 		if err != nil {
-			return nil, nil, err
+			return nil, nil, tracerr.Wrap(err)
 		}
 		rollupForgeBatchArgs.L1CoordinatorTxs = append(rollupForgeBatchArgs.L1CoordinatorTxs, *l1Tx)
 		rollupForgeBatchArgs.L1CoordinatorTxsAuths = append(rollupForgeBatchArgs.L1CoordinatorTxsAuths, signature)
 	}
 	rollupConsts, err := c.RollupConstants()
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	nLevels := rollupConsts.Verifiers[rollupForgeBatchArgs.VerifierIdx].NLevels
 	lenL2TxsBytes := int((nLevels/8)*2 + 2 + 1)
@@ -663,7 +664,7 @@ func (c *RollupClient) RollupForgeBatchArgs(ethTxHash ethCommon.Hash) (*RollupFo
 	for i := 0; i < numTxsL2; i++ {
 		l2Tx, err := common.L2TxFromBytes(aux.L2TxsData[i*lenL2TxsBytes:(i+1)*lenL2TxsBytes], int(nLevels))
 		if err != nil {
-			return nil, nil, err
+			return nil, nil, tracerr.Wrap(err)
 		}
 		rollupForgeBatchArgs.L2TxsData = append(rollupForgeBatchArgs.L2TxsData, *l2Tx)
 	}
@@ -679,7 +680,7 @@ func (c *RollupClient) RollupForgeBatchArgs(ethTxHash ethCommon.Hash) (*RollupFo
 		}
 		feeIdxCoordinator, err := common.IdxFromBytes(paddedFeeIdx[:])
 		if err != nil {
-			return nil, nil, err
+			return nil, nil, tracerr.Wrap(err)
 		}
 		if feeIdxCoordinator != common.Idx(0) {
 			rollupForgeBatchArgs.FeeIdxCoordinator = append(rollupForgeBatchArgs.FeeIdxCoordinator, feeIdxCoordinator)

eth/wdelayer.go

@@ -16,6 +16,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/common"
 	WithdrawalDelayer "github.com/hermeznetwork/hermez-node/eth/contracts/withdrawdelayer"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 )
 
 // DepositState is the state of Deposit
@@ -140,11 +141,11 @@ type WDelayerClient struct {
 func NewWDelayerClient(client *EthereumClient, address ethCommon.Address) (*WDelayerClient, error) {
 	contractAbi, err := abi.JSON(strings.NewReader(string(WithdrawalDelayer.WithdrawalDelayerABI)))
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	wdelayer, err := WithdrawalDelayer.NewWithdrawalDelayer(address, client.Client())
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &WDelayerClient{
 		client:      client,
@@ -159,9 +160,9 @@ func (c *WDelayerClient) WDelayerGetHermezGovernanceDAOAddress() (hermezGovernan
 	var _hermezGovernanceDAOAddress ethCommon.Address
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		_hermezGovernanceDAOAddress, err = c.wdelayer.GetHermezGovernanceDAOAddress(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &_hermezGovernanceDAOAddress, nil
 }
@@ -174,7 +175,7 @@ func (c *WDelayerClient) WDelayerSetHermezGovernanceDAOAddress(newAddress ethCom
 			return c.wdelayer.SetHermezGovernanceDAOAddress(auth, newAddress)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting hermezGovernanceDAOAddress: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting hermezGovernanceDAOAddress: %w", err))
 	}
 	return tx, nil
 }
@@ -184,9 +185,9 @@ func (c *WDelayerClient) WDelayerGetHermezKeeperAddress() (hermezKeeperAddress *
 	var _hermezKeeperAddress ethCommon.Address
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		_hermezKeeperAddress, err = c.wdelayer.GetHermezKeeperAddress(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &_hermezKeeperAddress, nil
 }
@@ -199,7 +200,7 @@ func (c *WDelayerClient) WDelayerSetHermezKeeperAddress(newAddress ethCommon.Add
 			return c.wdelayer.SetHermezKeeperAddress(auth, newAddress)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting hermezKeeperAddress: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting hermezKeeperAddress: %w", err))
 	}
 	return tx, nil
 }
@@ -209,9 +210,9 @@ func (c *WDelayerClient) WDelayerGetWhiteHackGroupAddress() (whiteHackGroupAddre
 	var _whiteHackGroupAddress ethCommon.Address
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		_whiteHackGroupAddress, err = c.wdelayer.GetWhiteHackGroupAddress(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &_whiteHackGroupAddress, nil
 }
@@ -224,7 +225,7 @@ func (c *WDelayerClient) WDelayerSetWhiteHackGroupAddress(newAddress ethCommon.A
 			return c.wdelayer.SetWhiteHackGroupAddress(auth, newAddress)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting whiteHackGroupAddress: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting whiteHackGroupAddress: %w", err))
 	}
 	return tx, nil
 }
@@ -233,9 +234,9 @@ func (c *WDelayerClient) WDelayerSetWhiteHackGroupAddress(newAddress ethCommon.A
 func (c *WDelayerClient) WDelayerIsEmergencyMode() (ermergencyMode bool, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		ermergencyMode, err = c.wdelayer.IsEmergencyMode(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return false, err
+		return false, tracerr.Wrap(err)
 	}
 	return ermergencyMode, nil
 }
@@ -244,9 +245,9 @@ func (c *WDelayerClient) WDelayerIsEmergencyMode() (ermergencyMode bool, err err
 func (c *WDelayerClient) WDelayerGetWithdrawalDelay() (withdrawalDelay *big.Int, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		withdrawalDelay, err = c.wdelayer.GetWithdrawalDelay(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return withdrawalDelay, nil
 }
@@ -255,9 +256,9 @@ func (c *WDelayerClient) WDelayerGetWithdrawalDelay() (withdrawalDelay *big.Int,
 func (c *WDelayerClient) WDelayerGetEmergencyModeStartingTime() (emergencyModeStartingTime *big.Int, err error) {
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		emergencyModeStartingTime, err = c.wdelayer.GetEmergencyModeStartingTime(nil)
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return emergencyModeStartingTime, nil
 }
@@ -270,7 +271,7 @@ func (c *WDelayerClient) WDelayerEnableEmergencyMode() (tx *types.Transaction, e
 			return c.wdelayer.EnableEmergencyMode(auth)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting enable emergency mode: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting enable emergency mode: %w", err))
 	}
 	return tx, nil
 }
@@ -283,7 +284,7 @@ func (c *WDelayerClient) WDelayerChangeWithdrawalDelay(newWithdrawalDelay uint64
 			return c.wdelayer.ChangeWithdrawalDelay(auth, newWithdrawalDelay)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed setting withdrawal delay: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed setting withdrawal delay: %w", err))
 	}
 	return tx, nil
 }
@@ -294,9 +295,9 @@ func (c *WDelayerClient) WDelayerDepositInfo(owner, token ethCommon.Address) (de
 		amount, depositTimestamp, err := c.wdelayer.DepositInfo(nil, owner, token)
 		depositInfo.Amount = amount
 		depositInfo.DepositTimestamp = depositTimestamp
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return depositInfo, err
+		return depositInfo, tracerr.Wrap(err)
 	}
 	return depositInfo, nil
 }
@@ -309,7 +310,7 @@ func (c *WDelayerClient) WDelayerDeposit(owner, token ethCommon.Address, amount
 			return c.wdelayer.Deposit(auth, owner, token, amount)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed deposit: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed deposit: %w", err))
 	}
 	return tx, nil
 }
@@ -322,7 +323,7 @@ func (c *WDelayerClient) WDelayerWithdrawal(owner, token ethCommon.Address) (tx
 			return c.wdelayer.Withdrawal(auth, owner, token)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed withdrawal: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed withdrawal: %w", err))
 	}
 	return tx, nil
 }
@@ -335,7 +336,7 @@ func (c *WDelayerClient) WDelayerEscapeHatchWithdrawal(to, token ethCommon.Addre
 			return c.wdelayer.EscapeHatchWithdrawal(auth, to, token, amount)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed escapeHatchWithdrawal: %w", err)
+		return nil, tracerr.Wrap(fmt.Errorf("Failed escapeHatchWithdrawal: %w", err))
 	}
 	return tx, nil
 }
@@ -346,19 +347,19 @@ func (c *WDelayerClient) WDelayerConstants() (constants *common.WDelayerConstant
 	if err := c.client.Call(func(ec *ethclient.Client) error {
 		constants.MaxWithdrawalDelay, err = c.wdelayer.MAXWITHDRAWALDELAY(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		constants.MaxEmergencyModeTime, err = c.wdelayer.MAXEMERGENCYMODETIME(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		constants.HermezRollup, err = c.wdelayer.HermezRollupAddress(nil)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
-		return err
+		return tracerr.Wrap(err)
 	}); err != nil {
-		return constants, err
+		return constants, tracerr.Wrap(err)
 	}
 	return constants, nil
 }
@@ -393,7 +394,7 @@ func (c *WDelayerClient) WDelayerEventsByBlock(blockNum int64) (*WDelayerEvents,
 
 	logs, err := c.client.client.FilterLogs(context.Background(), query)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	if len(logs) > 0 {
 		blockHash = &logs[0].BlockHash
@@ -401,14 +402,14 @@ func (c *WDelayerClient) WDelayerEventsByBlock(blockNum int64) (*WDelayerEvents,
 	for _, vLog := range logs {
 		if vLog.BlockHash != *blockHash {
 			log.Errorw("Block hash mismatch", "expected", blockHash.String(), "got", vLog.BlockHash.String())
-			return nil, nil, ErrBlockHashMismatchEvent
+			return nil, nil, tracerr.Wrap(ErrBlockHashMismatchEvent)
 		}
 		switch vLog.Topics[0] {
 		case logWDelayerDeposit:
 			var deposit WDelayerEventDeposit
 			err := c.contractAbi.Unpack(&deposit, "Deposit", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			deposit.Owner = ethCommon.BytesToAddress(vLog.Topics[1].Bytes())
 			deposit.Token = ethCommon.BytesToAddress(vLog.Topics[2].Bytes())
@@ -419,7 +420,7 @@ func (c *WDelayerClient) WDelayerEventsByBlock(blockNum int64) (*WDelayerEvents,
 			var withdraw WDelayerEventWithdraw
 			err := c.contractAbi.Unpack(&withdraw, "Withdraw", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			withdraw.Token = ethCommon.BytesToAddress(vLog.Topics[1].Bytes())
 			withdraw.Owner = ethCommon.BytesToAddress(vLog.Topics[2].Bytes())
@@ -433,7 +434,7 @@ func (c *WDelayerClient) WDelayerEventsByBlock(blockNum int64) (*WDelayerEvents,
 			var withdrawalDelay WDelayerEventNewWithdrawalDelay
 			err := c.contractAbi.Unpack(&withdrawalDelay, "NewWithdrawalDelay", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			wdelayerEvents.NewWithdrawalDelay = append(wdelayerEvents.NewWithdrawalDelay, withdrawalDelay)
 
@@ -441,7 +442,7 @@ func (c *WDelayerClient) WDelayerEventsByBlock(blockNum int64) (*WDelayerEvents,
 			var escapeHatchWithdrawal WDelayerEventEscapeHatchWithdrawal
 			err := c.contractAbi.Unpack(&escapeHatchWithdrawal, "EscapeHatchWithdrawal", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			escapeHatchWithdrawal.Who = ethCommon.BytesToAddress(vLog.Topics[1].Bytes())
 			escapeHatchWithdrawal.To = ethCommon.BytesToAddress(vLog.Topics[2].Bytes())
@@ -452,7 +453,7 @@ func (c *WDelayerClient) WDelayerEventsByBlock(blockNum int64) (*WDelayerEvents,
 			var keeperAddress WDelayerEventNewHermezKeeperAddress
 			err := c.contractAbi.Unpack(&keeperAddress, "NewHermezKeeperAddress", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			wdelayerEvents.NewHermezKeeperAddress = append(wdelayerEvents.NewHermezKeeperAddress, keeperAddress)
 
@@ -460,7 +461,7 @@ func (c *WDelayerClient) WDelayerEventsByBlock(blockNum int64) (*WDelayerEvents,
 			var whiteHackGroupAddress WDelayerEventNewWhiteHackGroupAddress
 			err := c.contractAbi.Unpack(&whiteHackGroupAddress, "NewWhiteHackGroupAddress", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			wdelayerEvents.NewWhiteHackGroupAddress = append(wdelayerEvents.NewWhiteHackGroupAddress, whiteHackGroupAddress)
 
@@ -468,7 +469,7 @@ func (c *WDelayerClient) WDelayerEventsByBlock(blockNum int64) (*WDelayerEvents,
 			var governanceDAOAddress WDelayerEventNewHermezGovernanceDAOAddress
 			err := c.contractAbi.Unpack(&governanceDAOAddress, "NewHermezGovernanceDAOAddress", vLog.Data)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			wdelayerEvents.NewHermezGovernanceDAOAddress = append(wdelayerEvents.NewHermezGovernanceDAOAddress, governanceDAOAddress)
 		}

node/node.go

@@ -24,6 +24,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/synchronizer"
 	"github.com/hermeznetwork/hermez-node/test/debugapi"
 	"github.com/hermeznetwork/hermez-node/txselector"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/jmoiron/sqlx"
 )
 
@@ -73,19 +74,19 @@ func NewNode(mode Mode, cfg *config.Node, coordCfg *config.Coordinator) (*Node,
 		cfg.PostgreSQL.Name,
 	)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	historyDB := historydb.NewHistoryDB(db)
 
 	stateDB, err := statedb.NewStateDB(cfg.StateDB.Path, statedb.TypeSynchronizer, 32)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	ethClient, err := ethclient.Dial(cfg.Web3.URL)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	var ethCfg eth.EthereumConfig
 	if mode == ModeCoordinator {
@@ -114,7 +115,7 @@ func NewNode(mode Mode, cfg *config.Node, coordCfg *config.Coordinator) (*Node,
 		},
 	})
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	sync, err := synchronizer.NewSynchronizer(client, historyDB, stateDB, synchronizer.Config{
@@ -123,7 +124,7 @@ func NewNode(mode Mode, cfg *config.Node, coordCfg *config.Coordinator) (*Node,
 		StatsRefreshPeriod: cfg.Synchronizer.StatsRefreshPeriod.Duration,
 	})
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	varsRollup, varsAuction, varsWDelayer := sync.SCVars()
 	initSCVars := synchronizer.SCVariables{
@@ -150,16 +151,16 @@ func NewNode(mode Mode, cfg *config.Node, coordCfg *config.Coordinator) (*Node,
 		// TODO: Get (maxL1UserTxs, maxL1OperatorTxs, maxTxs) from the smart contract
 		txSelector, err := txselector.NewTxSelector(coordCfg.TxSelector.Path, stateDB, l2DB, 10, 10, 10)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		// TODO: Get (configCircuits []ConfigCircuit, batchNum common.BatchNum, nLevels uint64) from smart contract
 		nLevels := uint64(32) //nolint:gomnd
 		batchBuilder, err := batchbuilder.NewBatchBuilder(coordCfg.BatchBuilder.Path, stateDB, nil, 0, nLevels)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		serverProofs := make([]coordinator.ServerProofInterface, len(coordCfg.ServerProofs))
 		for i, serverProofCfg := range coordCfg.ServerProofs {
@@ -180,18 +181,18 @@ func NewNode(mode Mode, cfg *config.Node, coordCfg *config.Coordinator) (*Node,
 			&initSCVars,
 		)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 	}
 	var nodeAPI *NodeAPI
 	if cfg.API.Address != "" {
 		if cfg.API.UpdateMetricsInterval.Duration == 0 {
-			return nil, fmt.Errorf("invalid cfg.API.UpdateMetricsInterval: %v",
+			return nil, tracerr.Wrap(fmt.Errorf("invalid cfg.API.UpdateMetricsInterval: %v",
-				cfg.API.UpdateMetricsInterval.Duration)
+				cfg.API.UpdateMetricsInterval.Duration))
 		}
 		if cfg.API.UpdateRecommendedFeeInterval.Duration == 0 {
-			return nil, fmt.Errorf("invalid cfg.API.UpdateRecommendedFeeInterval: %v",
+			return nil, tracerr.Wrap(fmt.Errorf("invalid cfg.API.UpdateRecommendedFeeInterval: %v",
-				cfg.API.UpdateRecommendedFeeInterval.Duration)
+				cfg.API.UpdateRecommendedFeeInterval.Duration))
 		}
 		server := gin.Default()
 		coord := false
@@ -213,7 +214,7 @@ func NewNode(mode Mode, cfg *config.Node, coordCfg *config.Coordinator) (*Node,
 			},
 		)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		nodeAPI.api.SetRollupVariables(initSCVars.Rollup)
 		nodeAPI.api.SetAuctionVariables(initSCVars.Auction)
@@ -273,7 +274,7 @@ func NewNodeAPI(
 		config,
 	)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	return &NodeAPI{
 		addr:   addr,
@@ -295,8 +296,7 @@ func (a *NodeAPI) Run(ctx context.Context) error {
 	}
 	go func() {
 		log.Infof("NodeAPI is ready at %v", a.addr)
-		if err := server.ListenAndServe(); err != nil &&
+		if err := server.ListenAndServe(); err != nil && tracerr.Unwrap(err) != http.ErrServerClosed {
-			err != http.ErrServerClosed {
 			log.Fatalf("Listen: %s\n", err)
 		}
 	}()
@@ -306,7 +306,7 @@ func (a *NodeAPI) Run(ctx context.Context) error {
 	ctxTimeout, cancel := context.WithTimeout(context.Background(), 10*time.Second) //nolint:gomnd
 	defer cancel()
 	if err := server.Shutdown(ctxTimeout); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	log.Info("NodeAPI done")
 	return nil

priceupdater/priceupdater.go

@@ -8,6 +8,7 @@ import (
 	"github.com/dghubble/sling"
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 )
 
 const (
@@ -66,7 +67,7 @@ func (p *PriceUpdater) UpdatePrices() {
 func (p *PriceUpdater) UpdateTokenList() error {
 	tokenSymbols, err := p.db.GetTokenSymbols()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	p.tokenSymbols = tokenSymbols
 	return nil

synchronizer/synchronizer.go

@@ -14,6 +14,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/statedb"
 	"github.com/hermeznetwork/hermez-node/eth"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 )
 
 var (
@@ -122,11 +123,11 @@ func (s *StatsHolder) UpdateEth(ethClient eth.ClientInterface) error {
 
 	lastBlock, err := ethClient.EthBlockByNumber(context.TODO(), -1)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	lastBatch, err := ethClient.RollupLastForgedBatch()
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	s.rw.Lock()
 	s.Eth.Updated = now
@@ -218,17 +219,17 @@ func NewSynchronizer(ethClient eth.ClientInterface, historyDB *historydb.History
 	auctionConstants, err := ethClient.AuctionConstants()
 	if err != nil {
 		log.Errorw("NewSynchronizer ethClient.AuctionConstants()", "err", err)
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	rollupConstants, err := ethClient.RollupConstants()
 	if err != nil {
 		log.Errorw("NewSynchronizer ethClient.RollupConstants()", "err", err)
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	wDelayerConstants, err := ethClient.WDelayerConstants()
 	if err != nil {
 		log.Errorw("NewSynchronizer ethClient.WDelayerConstants()", "err", err)
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	// Set startBlockNum to the minimum between Auction, Rollup and
@@ -296,7 +297,7 @@ func (s *Synchronizer) updateCurrentSlotIfSync(batchesLen int) error {
 		// fmt.Printf("DBG -1 from: %v, to: %v, len: %v\n", from, to, dbBatchesLen)
 		if err != nil {
 			log.Errorw("historyDB.GetBatchesLen", "err", err)
-			return err
+			return tracerr.Wrap(err)
 		}
 		slot.BatchesLen = dbBatchesLen
 	} else if slotNum > slot.SlotNum {
@@ -311,10 +312,10 @@ func (s *Synchronizer) updateCurrentSlotIfSync(batchesLen int) error {
 	// If Synced, update the current coordinator
 	if s.stats.Synced() {
 		bidCoord, err := s.historyDB.GetBestBidCoordinator(slot.SlotNum)
-		if err != nil && err != sql.ErrNoRows {
+		if err != nil && tracerr.Unwrap(err) != sql.ErrNoRows {
-			return err
+			return tracerr.Wrap(err)
 		}
-		if err == sql.ErrNoRows {
+		if tracerr.Unwrap(err) == sql.ErrNoRows {
 			slot.BootCoord = true
 			slot.Forger = s.vars.Auction.BootCoordinator
 			slot.URL = "???"
@@ -339,11 +340,11 @@ func (s *Synchronizer) updateCurrentSlotIfSync(batchesLen int) error {
 		// BEGIN SANITY CHECK
 		canForge, err := s.ethClient.AuctionCanForge(slot.Forger, blockNum)
 		if err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 		if !canForge {
-			return fmt.Errorf("Synchronized value of forger address for closed slot "+
+			return tracerr.Wrap(fmt.Errorf("Synchronized value of forger address for closed slot "+
-				"differs from smart contract: %+v", slot)
+				"differs from smart contract: %+v", slot))
 		}
 		// END SANITY CHECK
 	}
@@ -355,24 +356,24 @@ func (s *Synchronizer) init() error {
 	// Update stats parameters so that they have valid values before the
 	// first Sync call
 	if err := s.stats.UpdateEth(s.ethClient); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	lastBlock := &common.Block{}
 	lastSavedBlock, err := s.historyDB.GetLastBlock()
-	if err != nil && err != sql.ErrNoRows {
+	if err != nil && tracerr.Unwrap(err) != sql.ErrNoRows {
-		return err
+		return tracerr.Wrap(err)
 	}
 	// If there's no block in the DB (or we only have the default block 0),
 	// make sure that the stateDB is clean
-	if err == sql.ErrNoRows || lastSavedBlock.Num == 0 {
+	if tracerr.Unwrap(err) == sql.ErrNoRows || lastSavedBlock.Num == 0 {
 		if err := s.stateDB.Reset(0); err != nil {
-			return err
+			return tracerr.Wrap(err)
 		}
 	} else {
 		lastBlock = lastSavedBlock
 	}
 	if err := s.resetState(lastBlock); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	log.Infow("Sync init block",
@@ -401,12 +402,12 @@ func (s *Synchronizer) Sync2(ctx context.Context, lastSavedBlock *common.Block)
 		var err error
 		// Get lastSavedBlock from History DB
 		lastSavedBlock, err = s.historyDB.GetLastBlock()
-		if err != nil && err != sql.ErrNoRows {
+		if err != nil && tracerr.Unwrap(err) != sql.ErrNoRows {
-			return nil, nil, err
+			return nil, nil, tracerr.Wrap(err)
 		}
 		// If we don't have any stored block, we must do a full sync
 		// starting from the startBlockNum
-		if err == sql.ErrNoRows || lastSavedBlock.Num == 0 {
+		if tracerr.Unwrap(err) == sql.ErrNoRows || lastSavedBlock.Num == 0 {
 			nextBlockNum = s.startBlockNum
 			lastSavedBlock = nil
 		}
@@ -416,16 +417,16 @@ func (s *Synchronizer) Sync2(ctx context.Context, lastSavedBlock *common.Block)
 	}
 
 	ethBlock, err := s.ethClient.EthBlockByNumber(ctx, nextBlockNum)
-	if err == ethereum.NotFound {
+	if tracerr.Unwrap(err) == ethereum.NotFound {
 		return nil, nil, nil
 	} else if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 	log.Debugf("ethBlock: num: %v, parent: %v, hash: %v",
 		ethBlock.Num, ethBlock.ParentHash.String(), ethBlock.Hash.String())
 
 	if err := s.stats.UpdateEth(s.ethClient); err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 
 	log.Debugw("Syncing...",
@@ -442,7 +443,7 @@ func (s *Synchronizer) Sync2(ctx context.Context, lastSavedBlock *common.Block)
 				"block.parent(got)", ethBlock.ParentHash, "parent.hash(exp)", lastSavedBlock.Hash)
 			lastDBBlockNum, err := s.reorg(lastSavedBlock)
 			if err != nil {
-				return nil, nil, err
+				return nil, nil, tracerr.Wrap(err)
 			}
 			discarded := lastSavedBlock.Num - lastDBBlockNum
 			return nil, &discarded, nil
@@ -452,19 +453,19 @@ func (s *Synchronizer) Sync2(ctx context.Context, lastSavedBlock *common.Block)
 	// Get data from the rollup contract
 	rollupData, err := s.rollupSync(ethBlock)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 
 	// Get data from the auction contract
 	auctionData, err := s.auctionSync(ethBlock)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 
 	// Get data from the WithdrawalDelayer contract
 	wDelayerData, err := s.wdelayerSync(ethBlock)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 
 	for i := range rollupData.Withdrawals {
@@ -472,8 +473,8 @@ func (s *Synchronizer) Sync2(ctx context.Context, lastSavedBlock *common.Block)
 		if !withdrawal.InstantWithdraw {
 			wDelayerTransfers := wDelayerData.DepositsByTxHash[withdrawal.TxHash]
 			if len(wDelayerTransfers) == 0 {
-				return nil, nil, fmt.Errorf("WDelayer deposit corresponding to " +
+				return nil, nil, tracerr.Wrap(fmt.Errorf("WDelayer deposit corresponding to " +
-					"non-instant rollup withdrawal not found")
+					"non-instant rollup withdrawal not found"))
 			}
 			// Pop the first wDelayerTransfer to consume them in chronological order
 			wDelayerTransfer := wDelayerTransfers[0]
@@ -500,7 +501,7 @@ func (s *Synchronizer) Sync2(ctx context.Context, lastSavedBlock *common.Block)
 	// }
 	err = s.historyDB.AddBlockSCData(&blockData)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 
 	batchesLen := len(rollupData.Batches)
@@ -517,7 +518,7 @@ func (s *Synchronizer) Sync2(ctx context.Context, lastSavedBlock *common.Block)
 			&rollupData.Batches[batchesLen-1].Batch.BatchNum, lastL1BatchBlock)
 	}
 	if err := s.updateCurrentSlotIfSync(len(rollupData.Batches)); err != nil {
-		return nil, nil, err
+		return nil, nil, tracerr.Wrap(err)
 	}
 
 	log.Debugw("Synced block",
@@ -549,13 +550,13 @@ func (s *Synchronizer) reorg(uncleBlock *common.Block) (int64, error) {
 		ethBlock, err := s.ethClient.EthBlockByNumber(context.Background(), blockNum)
 		if err != nil {
 			log.Errorw("ethClient.EthBlockByNumber", "err", err)
-			return 0, err
+			return 0, tracerr.Wrap(err)
 		}
 
 		block, err = s.historyDB.GetBlock(blockNum)
 		if err != nil {
 			log.Errorw("historyDB.GetBlock", "err", err)
-			return 0, err
+			return 0, tracerr.Wrap(err)
 		}
 		if block.Hash == ethBlock.Hash {
 			log.Debugf("Found valid block: %v", blockNum)
@@ -569,11 +570,11 @@ func (s *Synchronizer) reorg(uncleBlock *common.Block) (int64, error) {
 	// Set History DB and State DB to the correct state
 	err := s.historyDB.Reorg(block.Num)
 	if err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 
 	if err := s.resetState(block); err != nil {
-		return 0, err
+		return 0, tracerr.Wrap(err)
 	}
 
 	return block.Num, nil
@@ -583,14 +584,14 @@ func (s *Synchronizer) resetState(block *common.Block) error {
 	rollup, auction, wDelayer, err := s.historyDB.GetSCVars()
 	// If SCVars are not in the HistoryDB, this is probably the first run
 	// of the Synchronizer: store the initial vars taken from config
-	if err == sql.ErrNoRows {
+	if tracerr.Unwrap(err) == sql.ErrNoRows {
 		rollup = &s.cfg.InitialVariables.Rollup
 		auction = &s.cfg.InitialVariables.Auction
 		wDelayer = &s.cfg.InitialVariables.WDelayer
 		log.Info("Setting initial SCVars in HistoryDB")
 		if err = s.historyDB.SetInitialSCVars(rollup, auction, wDelayer); err != nil {
 			log.Errorw("historyDB.SetInitialSCVars", "err", err)
-			return err
+			return tracerr.Wrap(err)
 		}
 	}
 	s.vars.Rollup = *rollup
@@ -598,33 +599,33 @@ func (s *Synchronizer) resetState(block *common.Block) error {
 	s.vars.WDelayer = *wDelayer
 
 	batchNum, err := s.historyDB.GetLastBatchNum()
-	if err != nil && err != sql.ErrNoRows {
+	if err != nil && tracerr.Unwrap(err) != sql.ErrNoRows {
 		log.Errorw("historyDB.GetLastBatchNum", "err", err)
-		return err
+		return tracerr.Wrap(err)
 	}
-	if err == sql.ErrNoRows {
+	if tracerr.Unwrap(err) == sql.ErrNoRows {
 		batchNum = 0
 	}
 
 	lastL1BatchBlockNum, err := s.historyDB.GetLastL1BatchBlockNum()
-	if err != nil && err != sql.ErrNoRows {
+	if err != nil && tracerr.Unwrap(err) != sql.ErrNoRows {
 		log.Errorw("historyDB.GetLastL1BatchBlockNum", "err", err)
-		return err
+		return tracerr.Wrap(err)
 	}
-	if err == sql.ErrNoRows {
+	if tracerr.Unwrap(err) == sql.ErrNoRows {
 		lastL1BatchBlockNum = 0
 	}
 
 	err = s.stateDB.Reset(batchNum)
 	if err != nil {
 		log.Errorw("stateDB.Reset", "err", err)
-		return err
+		return tracerr.Wrap(err)
 	}
 
 	s.stats.UpdateSync(block, &batchNum, &lastL1BatchBlockNum) // TODO
 
 	if err := s.updateCurrentSlotIfSync(-1); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	return nil
 }
@@ -685,7 +686,7 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 	// the expected one.
 	rollupEvents, blockHash, err := s.ethClient.RollupEventsByBlock(blockNum)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	// No events in this block
 	if blockHash == nil {
@@ -694,13 +695,13 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 	if *blockHash != ethBlock.Hash {
 		log.Errorw("Block hash mismatch in Rollup events", "expected", ethBlock.Hash.String(),
 			"got", blockHash.String())
-		return nil, eth.ErrBlockHashMismatchEvent
+		return nil, tracerr.Wrap(eth.ErrBlockHashMismatchEvent)
 	}
 
 	var nextForgeL1TxsNum int64 // forgeL1TxsNum for the next L1Batch
 	nextForgeL1TxsNumPtr, err := s.historyDB.GetLastL1TxsNum()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	if nextForgeL1TxsNumPtr != nil {
 		nextForgeL1TxsNum = *nextForgeL1TxsNumPtr + 1
@@ -711,7 +712,7 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 	// Get L1UserTX
 	rollupData.L1UserTxs, err = getL1UserTx(rollupEvents.L1UserTx, blockNum)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	// Get ForgeBatch events to get the L1CoordinatorTxs
@@ -722,7 +723,7 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 		// Get the input for each Tx
 		forgeBatchArgs, sender, err := s.ethClient.RollupForgeBatchArgs(evtForgeBatch.EthTxHash)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 
 		batchNum := common.BatchNum(evtForgeBatch.BatchNum)
@@ -736,7 +737,7 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 			// First try to find them in HistoryDB.
 			l1UserTxs, err = s.historyDB.GetL1UserTxs(nextForgeL1TxsNum)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			// Apart from the DB, try to find them in this block.
 			// This could happen because in a block there could be
@@ -763,7 +764,7 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 			l1CoordinatorTx.BatchNum = &batchNum
 			l1Tx, err := common.NewL1Tx(&l1CoordinatorTx)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 
 			batchData.L1CoordinatorTxs = append(batchData.L1CoordinatorTxs, *l1Tx)
@@ -787,7 +788,7 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 		processTxsOut, err := s.stateDB.ProcessTxs(ptc, forgeBatchArgs.FeeIdxCoordinator, l1UserTxs,
 			batchData.L1CoordinatorTxs, poolL2Txs)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 
 		// Set batchNum in exits
@@ -799,7 +800,7 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 
 		l2Txs, err := common.PoolL2TxsToL2Txs(poolL2Txs) // NOTE: This is a big uggly, find a better way
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 
 		for i := range l2Txs {
@@ -809,7 +810,7 @@ func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, e
 			tx.BatchNum = batchNum
 			nTx, err := common.NewL2Tx(tx)
 			if err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 
 			batchData.L2Txs = append(batchData.L2Txs, *nTx)
@@ -923,7 +924,7 @@ func (s *Synchronizer) auctionSync(ethBlock *common.Block) (*common.AuctionData,
 	// Get auction events in the block
 	auctionEvents, blockHash, err := s.ethClient.AuctionEventsByBlock(blockNum)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	// No events in this block
 	if blockHash == nil {
@@ -932,7 +933,7 @@ func (s *Synchronizer) auctionSync(ethBlock *common.Block) (*common.AuctionData,
 	if *blockHash != ethBlock.Hash {
 		log.Errorw("Block hash mismatch in Auction events", "expected", ethBlock.Hash.String(),
 			"got", blockHash.String())
-		return nil, eth.ErrBlockHashMismatchEvent
+		return nil, tracerr.Wrap(eth.ErrBlockHashMismatchEvent)
 	}
 
 	// Get bids
@@ -988,8 +989,8 @@ func (s *Synchronizer) auctionSync(ethBlock *common.Block) (*common.AuctionData,
 	}
 	for _, evt := range auctionEvents.NewDefaultSlotSetBid {
 		if evt.SlotSet > 6 { //nolint:gomnd
-			return nil, fmt.Errorf("unexpected SlotSet in "+
+			return nil, tracerr.Wrap(fmt.Errorf("unexpected SlotSet in "+
-				"auctionEvents.NewDefaultSlotSetBid: %v", evt.SlotSet)
+				"auctionEvents.NewDefaultSlotSetBid: %v", evt.SlotSet))
 		}
 		s.vars.Auction.DefaultSlotSetBid[evt.SlotSet] = evt.NewInitialMinBid
 		s.vars.Auction.DefaultSlotSetBidSlotNum = s.consts.Auction.SlotNum(blockNum) +
@@ -1017,7 +1018,7 @@ func (s *Synchronizer) wdelayerSync(ethBlock *common.Block) (*common.WDelayerDat
 	// Get wDelayer events in the block
 	wDelayerEvents, blockHash, err := s.ethClient.WDelayerEventsByBlock(blockNum)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	// No events in this block
 	if blockHash == nil {
@@ -1026,7 +1027,7 @@ func (s *Synchronizer) wdelayerSync(ethBlock *common.Block) (*common.WDelayerDat
 	if *blockHash != ethBlock.Hash {
 		log.Errorw("Block hash mismatch in WDelayer events", "expected", ethBlock.Hash.String(),
 			"got", blockHash.String())
-		return nil, eth.ErrBlockHashMismatchEvent
+		return nil, tracerr.Wrap(eth.ErrBlockHashMismatchEvent)
 	}
 
 	for _, evt := range wDelayerEvents.Deposit {
@@ -1086,7 +1087,7 @@ func getL1UserTx(eventsL1UserTx []eth.RollupEventL1UserTx, blockNum int64) ([]co
 		// Check validity of L1UserTx
 		l1Tx, err := common.NewL1Tx(&eventsL1UserTx[i].L1UserTx)
 		if err != nil {
-			return nil, err
+			return nil, tracerr.Wrap(err)
 		}
 		l1Txs[i] = *l1Tx
 	}

test/debugapi/debugapi.go

@@ -11,6 +11,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/statedb"
 	"github.com/hermeznetwork/hermez-node/log"
 	"github.com/hermeznetwork/hermez-node/synchronizer"
+	"github.com/hermeznetwork/tracerr"
 )
 
 func handleNoRoute(c *gin.Context) {
@@ -118,8 +119,7 @@ func (a *DebugAPI) Run(ctx context.Context) error {
 	}
 	go func() {
 		log.Infof("DebugAPI is ready at %v", a.addr)
-		if err := debugAPIServer.ListenAndServe(); err != nil &&
+		if err := debugAPIServer.ListenAndServe(); err != nil && tracerr.Unwrap(err) != http.ErrServerClosed {
-			err != http.ErrServerClosed {
 			log.Fatalf("Listen: %s\n", err)
 		}
 	}()
@@ -129,7 +129,7 @@ func (a *DebugAPI) Run(ctx context.Context) error {
 	ctxTimeout, cancel := context.WithTimeout(context.Background(), 10*time.Second) //nolint:gomnd
 	defer cancel()
 	if err := debugAPIServer.Shutdown(ctxTimeout); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	log.Info("DebugAPI done")
 	return nil

test/ethclient.go

@@ -16,6 +16,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/eth"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	"github.com/mitchellh/copystructure"
 )
@@ -111,7 +112,7 @@ func (a *AuctionBlock) getSlotSet(slot int64) int64 {
 
 func (a *AuctionBlock) getMinBidBySlot(slot int64) (*big.Int, error) {
 	if slot < a.getCurrentSlotNumber()+int64(a.Vars.ClosedAuctionSlots) {
-		return nil, errBidClosed
+		return nil, tracerr.Wrap(errBidClosed)
 	}
 
 	slotSet := a.getSlotSet(slot)
@@ -140,9 +141,9 @@ func (a *AuctionBlock) getMinBidBySlot(slot int64) (*big.Int, error) {
 
 func (a *AuctionBlock) forge(forger ethCommon.Address) error {
 	if ok, err := a.canForge(forger, a.Eth.BlockNum); err != nil {
-		return err
+		return tracerr.Wrap(err)
 	} else if !ok {
-		return fmt.Errorf("Can't forge")
+		return tracerr.Wrap(fmt.Errorf("Can't forge"))
 	}
 
 	slotToForge := a.getSlotNumber(a.Eth.BlockNum)
@@ -162,7 +163,7 @@ func (a *AuctionBlock) forge(forger ethCommon.Address) error {
 
 func (a *AuctionBlock) canForge(forger ethCommon.Address, blockNum int64) (bool, error) {
 	if blockNum < a.Constants.GenesisBlockNum {
-		return false, fmt.Errorf("Auction has not started yet")
+		return false, tracerr.Wrap(fmt.Errorf("Auction has not started yet"))
 	}
 
 	slotToForge := a.getSlotNumber(blockNum)
@@ -616,7 +617,7 @@ func (c *Client) EthERC20Consts(tokenAddr ethCommon.Address) (*eth.ERC20Consts,
 	if constants, ok := e.Tokens[tokenAddr]; ok {
 		return &constants, nil
 	}
-	return nil, fmt.Errorf("tokenAddr not found")
+	return nil, tracerr.Wrap(fmt.Errorf("tokenAddr not found"))
 }
 
 // func newHeader(number *big.Int) *types.Header {
@@ -656,7 +657,7 @@ func (c *Client) EthBlockByNumber(ctx context.Context, blockNum int64) (*common.
 // EthAddress returns the ethereum address of the account loaded into the Client
 func (c *Client) EthAddress() (*ethCommon.Address, error) {
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 	return c.addr, nil
 }
@@ -697,7 +698,7 @@ var errTODO = fmt.Errorf("TODO: Not implemented yet")
 // RollupL1UserTxERC20Permit is the interface to call the smart contract function
 func (c *Client) RollupL1UserTxERC20Permit(fromBJJ *babyjub.PublicKey, fromIdx int64, loadAmount *big.Int, amount *big.Int, tokenID uint32, toIdx int64, deadline *big.Int) (tx *types.Transaction, err error) {
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // RollupL1UserTxERC20ETH sends an L1UserTx to the Rollup.
@@ -716,11 +717,11 @@ func (c *Client) RollupL1UserTxERC20ETH(
 
 	_, err = common.NewFloat16(amount)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	_, err = common.NewFloat16(loadAmount)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	nextBlock := c.nextBlock()
@@ -751,7 +752,7 @@ func (c *Client) RollupL1UserTxERC20ETH(
 		UserOrigin:      true,
 	})
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	queue.L1TxQueue = append(queue.L1TxQueue, *l1Tx)
@@ -770,7 +771,7 @@ func (c *Client) RollupL1UserTxERC20ETH(
 // RollupRegisterTokensCount is the interface to call the smart contract function
 func (c *Client) RollupRegisterTokensCount() (*big.Int, error) {
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // RollupLastForgedBatch is the interface to call the smart contract function
@@ -786,7 +787,7 @@ func (c *Client) RollupLastForgedBatch() (int64, error) {
 // RollupWithdrawCircuit is the interface to call the smart contract function
 func (c *Client) RollupWithdrawCircuit(proofA, proofC [2]*big.Int, proofB [2][2]*big.Int, tokenID uint32, numExitRoot, idx int64, amount *big.Int, instantWithdraw bool) (*types.Transaction, error) {
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // RollupWithdrawMerkleProof is the interface to call the smart contract function
@@ -800,10 +801,10 @@ func (c *Client) RollupWithdrawMerkleProof(babyPubKey *babyjub.PublicKey, tokenI
 	r := nextBlock.Rollup
 
 	if int(numExitRoot) >= len(r.State.ExitRoots) {
-		return nil, fmt.Errorf("numExitRoot >= len(r.State.ExitRoots)")
+		return nil, tracerr.Wrap(fmt.Errorf("numExitRoot >= len(r.State.ExitRoots)"))
 	}
 	if _, ok := r.State.ExitNullifierMap[numExitRoot][idx]; ok {
-		return nil, fmt.Errorf("exit already withdrawn")
+		return nil, tracerr.Wrap(fmt.Errorf("exit already withdrawn"))
 	}
 	r.State.ExitNullifierMap[numExitRoot][idx] = true
 
@@ -860,16 +861,16 @@ func (c *Client) RollupForgeBatch(args *eth.RollupForgeBatchArgs) (tx *types.Tra
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	a := c.nextBlock().Auction
 	ok, err := a.canForge(*c.addr, a.Eth.BlockNum)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	if !ok {
-		return nil, fmt.Errorf("incorrect slot")
+		return nil, tracerr.Wrap(fmt.Errorf("incorrect slot"))
 	}
 
 	// TODO: Verify proof
@@ -877,7 +878,7 @@ func (c *Client) RollupForgeBatch(args *eth.RollupForgeBatchArgs) (tx *types.Tra
 	// Auction
 	err = a.forge(*c.addr)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	// TODO: If successful, store the tx in a successful array.
@@ -902,7 +903,7 @@ func (c *Client) addBatch(args *eth.RollupForgeBatchArgs) (*types.Transaction, e
 	r := nextBlock.Rollup
 	r.State.StateRoot = args.NewStRoot
 	if args.NewLastIdx < r.State.CurrentIdx {
-		return nil, fmt.Errorf("args.NewLastIdx < r.State.CurrentIdx")
+		return nil, tracerr.Wrap(fmt.Errorf("args.NewLastIdx < r.State.CurrentIdx"))
 	}
 	r.State.CurrentIdx = args.NewLastIdx
 	r.State.ExitNullifierMap[int64(len(r.State.ExitRoots))] = make(map[int64]bool)
@@ -938,16 +939,16 @@ func (c *Client) RollupAddToken(tokenAddress ethCommon.Address, feeAddToken *big
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	nextBlock := c.nextBlock()
 	r := nextBlock.Rollup
 	if _, ok := r.State.TokenMap[tokenAddress]; ok {
-		return nil, fmt.Errorf("Token %v already registered", tokenAddress)
+		return nil, tracerr.Wrap(fmt.Errorf("Token %v already registered", tokenAddress))
 	}
 	if feeAddToken.Cmp(r.Vars.FeeAddToken) != 0 {
-		return nil, fmt.Errorf("Expected fee: %v but got: %v", r.Vars.FeeAddToken, feeAddToken)
+		return nil, tracerr.Wrap(fmt.Errorf("Expected fee: %v but got: %v", r.Vars.FeeAddToken, feeAddToken))
 	}
 
 	r.State.TokenMap[tokenAddress] = true
@@ -963,7 +964,7 @@ func (c *Client) RollupGetCurrentTokens() (*big.Int, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // RollupUpdateForgeL1L2BatchTimeout is the interface to call the smart contract function
@@ -973,7 +974,7 @@ func (c *Client) RollupUpdateForgeL1L2BatchTimeout(newForgeL1Timeout int64) (tx
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	nextBlock := c.nextBlock()
@@ -992,11 +993,11 @@ func (c *Client) RollupUpdateFeeAddToken(newFeeAddToken *big.Int) (tx *types.Tra
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // RollupUpdateTokensHEZ is the interface to call the smart contract function
@@ -1030,7 +1031,7 @@ func (c *Client) RollupEventsByBlock(blockNum int64) (*eth.RollupEvents, *ethCom
 
 	block, ok := c.blocks[blockNum]
 	if !ok {
-		return nil, nil, fmt.Errorf("Block %v doesn't exist", blockNum)
+		return nil, nil, tracerr.Wrap(fmt.Errorf("Block %v doesn't exist", blockNum))
 	}
 	return &block.Rollup.Events, &block.Eth.Hash, nil
 }
@@ -1042,7 +1043,7 @@ func (c *Client) RollupForgeBatchArgs(ethTxHash ethCommon.Hash) (*eth.RollupForg
 
 	batch, ok := c.forgeBatchArgs[ethTxHash]
 	if !ok {
-		return nil, nil, fmt.Errorf("transaction not found")
+		return nil, nil, tracerr.Wrap(fmt.Errorf("transaction not found"))
 	}
 	return &batch.ForgeBatchArgs, &batch.Sender, nil
 }
@@ -1058,11 +1059,11 @@ func (c *Client) AuctionSetSlotDeadline(newDeadline uint8) (tx *types.Transactio
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetSlotDeadline is the interface to call the smart contract function
@@ -1071,7 +1072,7 @@ func (c *Client) AuctionGetSlotDeadline() (uint8, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return 0, errTODO
+	return 0, tracerr.Wrap(errTODO)
 }
 
 // AuctionSetOpenAuctionSlots is the interface to call the smart contract function
@@ -1081,7 +1082,7 @@ func (c *Client) AuctionSetOpenAuctionSlots(newOpenAuctionSlots uint16) (tx *typ
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	nextBlock := c.nextBlock()
@@ -1099,7 +1100,7 @@ func (c *Client) AuctionGetOpenAuctionSlots() (uint16, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return 0, errTODO
+	return 0, tracerr.Wrap(errTODO)
 }
 
 // AuctionSetClosedAuctionSlots is the interface to call the smart contract function
@@ -1109,11 +1110,11 @@ func (c *Client) AuctionSetClosedAuctionSlots(newClosedAuctionSlots uint16) (tx
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetClosedAuctionSlots is the interface to call the smart contract function
@@ -1122,7 +1123,7 @@ func (c *Client) AuctionGetClosedAuctionSlots() (uint16, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return 0, errTODO
+	return 0, tracerr.Wrap(errTODO)
 }
 
 // AuctionSetOutbidding is the interface to call the smart contract function
@@ -1132,11 +1133,11 @@ func (c *Client) AuctionSetOutbidding(newOutbidding uint16) (tx *types.Transacti
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetOutbidding is the interface to call the smart contract function
@@ -1145,7 +1146,7 @@ func (c *Client) AuctionGetOutbidding() (uint16, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return 0, errTODO
+	return 0, tracerr.Wrap(errTODO)
 }
 
 // AuctionSetAllocationRatio is the interface to call the smart contract function
@@ -1155,11 +1156,11 @@ func (c *Client) AuctionSetAllocationRatio(newAllocationRatio [3]uint16) (tx *ty
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetAllocationRatio is the interface to call the smart contract function
@@ -1168,7 +1169,7 @@ func (c *Client) AuctionGetAllocationRatio() ([3]uint16, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return [3]uint16{}, errTODO
+	return [3]uint16{}, tracerr.Wrap(errTODO)
 }
 
 // AuctionSetDonationAddress is the interface to call the smart contract function
@@ -1178,11 +1179,11 @@ func (c *Client) AuctionSetDonationAddress(newDonationAddress ethCommon.Address)
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetDonationAddress is the interface to call the smart contract function
@@ -1191,7 +1192,7 @@ func (c *Client) AuctionGetDonationAddress() (*ethCommon.Address, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionSetBootCoordinator is the interface to call the smart contract function
@@ -1201,11 +1202,11 @@ func (c *Client) AuctionSetBootCoordinator(newBootCoordinator ethCommon.Address)
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetBootCoordinator is the interface to call the smart contract function
@@ -1226,11 +1227,11 @@ func (c *Client) AuctionChangeDefaultSlotSetBid(slotSet int64, newInitialMinBid
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionSetCoordinator is the interface to call the smart contract function
@@ -1240,7 +1241,7 @@ func (c *Client) AuctionSetCoordinator(forger ethCommon.Address, URL string) (tx
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	nextBlock := c.nextBlock()
@@ -1272,7 +1273,7 @@ func (c *Client) AuctionIsRegisteredCoordinator(forgerAddress ethCommon.Address)
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return false, errTODO
+	return false, tracerr.Wrap(errTODO)
 }
 
 // AuctionUpdateCoordinatorInfo is the interface to call the smart contract function
@@ -1282,11 +1283,11 @@ func (c *Client) AuctionUpdateCoordinatorInfo(forgerAddress ethCommon.Address, n
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetSlotNumber is the interface to call the smart contract function
@@ -1305,7 +1306,7 @@ func (c *Client) AuctionGetCurrentSlotNumber() (int64, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return 0, errTODO
+	return 0, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetMinBidBySlot is the interface to call the smart contract function
@@ -1314,7 +1315,7 @@ func (c *Client) AuctionGetMinBidBySlot(slot int64) (*big.Int, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetDefaultSlotSetBid is the interface to call the smart contract function
@@ -1323,7 +1324,7 @@ func (c *Client) AuctionGetDefaultSlotSetBid(slotSet uint8) (*big.Int, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetSlotSet is the interface to call the smart contract function
@@ -1332,7 +1333,7 @@ func (c *Client) AuctionGetSlotSet(slot int64) (*big.Int, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionTokensReceived is the interface to call the smart contract function
@@ -1354,30 +1355,30 @@ func (c *Client) AuctionBid(amount *big.Int, slot int64, bidAmount *big.Int,
 	cpy := c.nextBlock().copy()
 	defer func() { func() { c.revertIfErr(err, cpy) }() }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	nextBlock := c.nextBlock()
 	a := nextBlock.Auction
 
 	if slot < a.getCurrentSlotNumber()+int64(a.Vars.ClosedAuctionSlots) {
-		return nil, errBidClosed
+		return nil, tracerr.Wrap(errBidClosed)
 	}
 
 	if slot >= a.getCurrentSlotNumber()+int64(a.Vars.ClosedAuctionSlots)+int64(a.Vars.OpenAuctionSlots) {
-		return nil, errBidNotOpen
+		return nil, tracerr.Wrap(errBidNotOpen)
 	}
 
 	minBid, err := a.getMinBidBySlot(slot)
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	if bidAmount.Cmp(minBid) == -1 {
-		return nil, errBidBelowMin
+		return nil, tracerr.Wrap(errBidBelowMin)
 	}
 
 	if _, ok := a.State.Coordinators[*c.addr]; !ok {
-		return nil, errCoordNotReg
+		return nil, tracerr.Wrap(errCoordNotReg)
 	}
 
 	slotState, ok := a.State.Slots[slot]
@@ -1408,11 +1409,11 @@ func (c *Client) AuctionMultiBid(amount *big.Int, startingSlot int64, endingSlot
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionCanForge is the interface to call the smart contract function
@@ -1432,11 +1433,11 @@ func (c *Client) AuctionForge(forger ethCommon.Address) (tx *types.Transaction,
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionClaimHEZ is the interface to call the smart contract function
@@ -1446,11 +1447,11 @@ func (c *Client) AuctionClaimHEZ() (tx *types.Transaction, err error) {
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionGetClaimableHEZ is the interface to call the smart contract function
@@ -1459,7 +1460,7 @@ func (c *Client) AuctionGetClaimableHEZ(bidder ethCommon.Address) (*big.Int, err
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // AuctionConstants returns the Constants of the Auction Smart Contract
@@ -1477,7 +1478,7 @@ func (c *Client) AuctionEventsByBlock(blockNum int64) (*eth.AuctionEvents, *ethC
 
 	block, ok := c.blocks[blockNum]
 	if !ok {
-		return nil, nil, fmt.Errorf("Block %v doesn't exist", blockNum)
+		return nil, nil, tracerr.Wrap(fmt.Errorf("Block %v doesn't exist", blockNum))
 	}
 	return &block.Auction.Events, &block.Eth.Hash, nil
 }
@@ -1492,7 +1493,7 @@ func (c *Client) WDelayerGetHermezGovernanceDAOAddress() (*ethCommon.Address, er
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerSetHermezGovernanceDAOAddress is the interface to call the smart contract function
@@ -1502,11 +1503,11 @@ func (c *Client) WDelayerSetHermezGovernanceDAOAddress(newAddress ethCommon.Addr
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerGetHermezKeeperAddress is the interface to call the smart contract function
@@ -1515,7 +1516,7 @@ func (c *Client) WDelayerGetHermezKeeperAddress() (*ethCommon.Address, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerSetHermezKeeperAddress is the interface to call the smart contract function
@@ -1525,11 +1526,11 @@ func (c *Client) WDelayerSetHermezKeeperAddress(newAddress ethCommon.Address) (t
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerGetWhiteHackGroupAddress is the interface to call the smart contract function
@@ -1538,7 +1539,7 @@ func (c *Client) WDelayerGetWhiteHackGroupAddress() (*ethCommon.Address, error)
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerSetWhiteHackGroupAddress is the interface to call the smart contract function
@@ -1548,11 +1549,11 @@ func (c *Client) WDelayerSetWhiteHackGroupAddress(newAddress ethCommon.Address)
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerIsEmergencyMode is the interface to call the smart contract function
@@ -1561,7 +1562,7 @@ func (c *Client) WDelayerIsEmergencyMode() (bool, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return false, errTODO
+	return false, tracerr.Wrap(errTODO)
 }
 
 // WDelayerGetWithdrawalDelay is the interface to call the smart contract function
@@ -1570,7 +1571,7 @@ func (c *Client) WDelayerGetWithdrawalDelay() (*big.Int, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerGetEmergencyModeStartingTime is the interface to call the smart contract function
@@ -1579,7 +1580,7 @@ func (c *Client) WDelayerGetEmergencyModeStartingTime() (*big.Int, error) {
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerEnableEmergencyMode is the interface to call the smart contract function
@@ -1589,11 +1590,11 @@ func (c *Client) WDelayerEnableEmergencyMode() (tx *types.Transaction, err error
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerChangeWithdrawalDelay is the interface to call the smart contract function
@@ -1603,7 +1604,7 @@ func (c *Client) WDelayerChangeWithdrawalDelay(newWithdrawalDelay uint64) (tx *t
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	nextBlock := c.nextBlock()
@@ -1621,7 +1622,7 @@ func (c *Client) WDelayerDepositInfo(owner, token ethCommon.Address) (eth.Deposi
 	defer c.rw.RUnlock()
 
 	log.Error("TODO")
-	return eth.DepositState{}, errTODO
+	return eth.DepositState{}, tracerr.Wrap(errTODO)
 }
 
 // WDelayerDeposit is the interface to call the smart contract function
@@ -1631,11 +1632,11 @@ func (c *Client) WDelayerDeposit(onwer, token ethCommon.Address, amount *big.Int
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerWithdrawal is the interface to call the smart contract function
@@ -1645,11 +1646,11 @@ func (c *Client) WDelayerWithdrawal(owner, token ethCommon.Address) (tx *types.T
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerEscapeHatchWithdrawal is the interface to call the smart contract function
@@ -1659,11 +1660,11 @@ func (c *Client) WDelayerEscapeHatchWithdrawal(to, token ethCommon.Address, amou
 	cpy := c.nextBlock().copy()
 	defer func() { c.revertIfErr(err, cpy) }()
 	if c.addr == nil {
-		return nil, eth.ErrAccountNil
+		return nil, tracerr.Wrap(eth.ErrAccountNil)
 	}
 
 	log.Error("TODO")
-	return nil, errTODO
+	return nil, tracerr.Wrap(errTODO)
 }
 
 // WDelayerEventsByBlock returns the events in a block that happened in the WDelayer Contract
@@ -1673,7 +1674,7 @@ func (c *Client) WDelayerEventsByBlock(blockNum int64) (*eth.WDelayerEvents, *et
 
 	block, ok := c.blocks[blockNum]
 	if !ok {
-		return nil, nil, fmt.Errorf("Block %v doesn't exist", blockNum)
+		return nil, nil, tracerr.Wrap(fmt.Errorf("Block %v doesn't exist", blockNum))
 	}
 	return &block.WDelayer.Events, &block.Eth.Hash, nil
 }

test/ethclient_test.go

@@ -12,6 +12,7 @@ import (
 	ethCrypto "github.com/ethereum/go-ethereum/crypto"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/eth"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -95,20 +96,20 @@ func TestClientAuction(t *testing.T) {
 	// Check several cases in which bid doesn't succed, and also do 2 successful bids.
 
 	_, err := c.AuctionBidSimple(0, big.NewInt(1))
-	assert.Equal(t, errBidClosed, err)
+	assert.Equal(t, errBidClosed, tracerr.Unwrap(err))
 
 	_, err = c.AuctionBidSimple(4322, big.NewInt(1))
-	assert.Equal(t, errBidNotOpen, err)
+	assert.Equal(t, errBidNotOpen, tracerr.Unwrap(err))
 
 	// 101 % 6 = 5;  defaultSlotSetBid[5] = 1500;  1500 + 10% = 1650
 	_, err = c.AuctionBidSimple(101, big.NewInt(1650))
-	assert.Equal(t, errCoordNotReg, err)
+	assert.Equal(t, errCoordNotReg, tracerr.Unwrap(err))
 
 	_, err = c.AuctionSetCoordinator(addrForge, "https://foo.bar")
 	assert.Nil(t, err)
 
 	_, err = c.AuctionBidSimple(3, big.NewInt(1))
-	assert.Equal(t, errBidBelowMin, err)
+	assert.Equal(t, errBidBelowMin, tracerr.Unwrap(err))
 
 	_, err = c.AuctionBidSimple(3, big.NewInt(1650))
 	assert.Nil(t, err)
@@ -118,7 +119,7 @@ func TestClientAuction(t *testing.T) {
 	assert.Nil(t, err)
 
 	_, err = c.AuctionBidSimple(3, big.NewInt(16))
-	assert.Equal(t, errBidBelowMin, err)
+	assert.Equal(t, errBidBelowMin, tracerr.Unwrap(err))
 
 	// 1650 + 10% = 1815
 	_, err = c.AuctionBidSimple(3, big.NewInt(1815))

test/historydb.go

@@ -8,6 +8,7 @@ import (
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/hermeznetwork/hermez-node/common"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 	"github.com/iden3/go-merkletree"
 )
@@ -425,7 +426,7 @@ func randomAccount(seed int, userAccount bool, userAddr *ethCommon.Address, accs
 		i++
 		i = i % len(accs)
 		if i == firstI {
-			return &acc, errors.New("Didnt found any account matchinng the criteria")
+			return &acc, tracerr.Wrap(errors.New("Didnt found any account matchinng the criteria"))
 		}
 	}
 }

test/til/lang.go

@@ -11,6 +11,7 @@ import (
 
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 )
 
 var eof = rune(0)
@@ -272,7 +273,7 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 	c := &instruction{}
 	tok, lit := p.scanIgnoreWhitespace()
 	if tok == EOF {
-		return nil, errof
+		return nil, tracerr.Wrap(errof)
 	}
 	c.literal += lit
 	if lit == "/" {
@@ -280,7 +281,7 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 		return nil, commentLine
 	} else if lit == ">" {
 		if setType == setTypePoolL2 {
-			return c, fmt.Errorf("Unexpected '>' at PoolL2Txs set")
+			return c, tracerr.Wrap(fmt.Errorf("Unexpected '>' at PoolL2Txs set"))
 		}
 		_, lit = p.scanIgnoreWhitespace()
 		if lit == "batch" {
@@ -293,11 +294,11 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 			_, _ = p.s.r.ReadString('\n')
 			return &instruction{typ: typeNewBlock}, newEventLine
 		} else {
-			return c, fmt.Errorf("Unexpected '> %s', expected '> batch' or '> block'", lit)
+			return c, tracerr.Wrap(fmt.Errorf("Unexpected '> %s', expected '> batch' or '> block'", lit))
 		}
 	} else if lit == "Type" {
 		if err := p.expectChar(c, ":"); err != nil {
-			return c, err
+			return c, tracerr.Wrap(err)
 		}
 		_, lit = p.scanIgnoreWhitespace()
 		if lit == "Blockchain" {
@@ -305,11 +306,11 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 		} else if lit == "PoolL2" {
 			return &instruction{typ: "PoolL2"}, setTypeLine
 		} else {
-			return c, fmt.Errorf("Invalid set type: '%s'. Valid set types: 'Blockchain', 'PoolL2'", lit)
+			return c, tracerr.Wrap(fmt.Errorf("Invalid set type: '%s'. Valid set types: 'Blockchain', 'PoolL2'", lit))
 		}
 	} else if lit == "AddToken" {
 		if err := p.expectChar(c, "("); err != nil {
-			return c, err
+			return c, tracerr.Wrap(err)
 		}
 		_, lit = p.scanIgnoreWhitespace()
 		c.literal += lit
@@ -317,11 +318,11 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 		if err != nil {
 			line, _ := p.s.r.ReadString('\n')
 			c.literal += line
-			return c, err
+			return c, tracerr.Wrap(err)
 		}
 		c.tokenID = common.TokenID(tidI)
 		if err := p.expectChar(c, ")"); err != nil {
-			return c, err
+			return c, tracerr.Wrap(err)
 		}
 		c.typ = typeAddToken
 		line, _ := p.s.r.ReadString('\n')
@@ -330,7 +331,7 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 	}
 
 	if setType == "" {
-		return c, fmt.Errorf("Set type not defined")
+		return c, tracerr.Wrap(fmt.Errorf("Set type not defined"))
 	}
 	transferring := false
 	fee := false
@@ -363,7 +364,7 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 		case "ForceExit":
 			c.typ = common.TxTypeForceExit
 		default:
-			return c, fmt.Errorf("Unexpected Blockchain tx type: %s", lit)
+			return c, tracerr.Wrap(fmt.Errorf("Unexpected Blockchain tx type: %s", lit))
 		}
 	} else if setType == setTypePoolL2 {
 		switch lit {
@@ -383,14 +384,14 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 			c.typ = common.TxTypeExit
 			fee = true
 		default:
-			return c, fmt.Errorf("Unexpected PoolL2 tx type: %s", lit)
+			return c, tracerr.Wrap(fmt.Errorf("Unexpected PoolL2 tx type: %s", lit))
 		}
 	} else {
-		return c, fmt.Errorf("Invalid set type: '%s'. Valid set types: 'Blockchain', 'PoolL2'", setType)
+		return c, tracerr.Wrap(fmt.Errorf("Invalid set type: '%s'. Valid set types: 'Blockchain', 'PoolL2'", setType))
 	}
 
 	if err := p.expectChar(c, "("); err != nil {
-		return c, err
+		return c, tracerr.Wrap(err)
 	}
 	_, lit = p.scanIgnoreWhitespace()
 	c.literal += lit
@@ -398,11 +399,11 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 	if err != nil {
 		line, _ := p.s.r.ReadString('\n')
 		c.literal += line
-		return c, err
+		return c, tracerr.Wrap(err)
 	}
 	c.tokenID = common.TokenID(tidI)
 	if err := p.expectChar(c, ")"); err != nil {
-		return c, err
+		return c, tracerr.Wrap(err)
 	}
 	_, lit = p.scanIgnoreWhitespace()
 	c.literal += lit
@@ -416,7 +417,7 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 	c.literal += lit
 	if transferring {
 		if lit != "-" {
-			return c, fmt.Errorf("Expected '-', found '%s'", lit)
+			return c, tracerr.Wrap(fmt.Errorf("Expected '-', found '%s'", lit))
 		}
 		_, lit = p.scanIgnoreWhitespace()
 		c.literal += lit
@@ -427,7 +428,7 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 	if lit != ":" {
 		line, _ := p.s.r.ReadString('\n')
 		c.literal += line
-		return c, fmt.Errorf("Expected ':', found '%s'", lit)
+		return c, tracerr.Wrap(fmt.Errorf("Expected ':', found '%s'", lit))
 	}
 	if c.typ == common.TxTypeDepositTransfer ||
 		c.typ == common.TxTypeCreateAccountDepositTransfer {
@@ -438,11 +439,11 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 		if !ok {
 			line, _ := p.s.r.ReadString('\n')
 			c.literal += line
-			return c, fmt.Errorf("Can not parse number for LoadAmount")
+			return c, tracerr.Wrap(fmt.Errorf("Can not parse number for LoadAmount"))
 		}
 		c.loadAmount = loadAmount
 		if err := p.expectChar(c, ","); err != nil {
-			return c, err
+			return c, tracerr.Wrap(err)
 		}
 	}
 	_, lit = p.scanIgnoreWhitespace()
@@ -451,7 +452,7 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 	if !ok {
 		line, _ := p.s.r.ReadString('\n')
 		c.literal += line
-		return c, fmt.Errorf("Can not parse number for Amount: %s", lit)
+		return c, tracerr.Wrap(fmt.Errorf("Can not parse number for Amount: %s", lit))
 	}
 	if c.typ == common.TxTypeDeposit ||
 		c.typ == common.TxTypeCreateAccountDeposit {
@@ -461,7 +462,7 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 	}
 	if fee {
 		if err := p.expectChar(c, "("); err != nil {
-			return c, err
+			return c, tracerr.Wrap(err)
 		}
 		_, lit = p.scanIgnoreWhitespace()
 		c.literal += lit
@@ -469,22 +470,22 @@ func (p *parser) parseLine(setType setType) (*instruction, error) {
 		if err != nil {
 			line, _ := p.s.r.ReadString('\n')
 			c.literal += line
-			return c, err
+			return c, tracerr.Wrap(err)
 		}
 		if fee > common.MaxFeePlan-1 {
 			line, _ := p.s.r.ReadString('\n')
 			c.literal += line
-			return c, fmt.Errorf("Fee %d can not be bigger than 255", fee)
+			return c, tracerr.Wrap(fmt.Errorf("Fee %d can not be bigger than 255", fee))
 		}
 		c.fee = uint8(fee)
 
 		if err := p.expectChar(c, ")"); err != nil {
-			return c, err
+			return c, tracerr.Wrap(err)
 		}
 	}
 
 	if tok == EOF {
-		return nil, errof
+		return nil, tracerr.Wrap(errof)
 	}
 	return c, nil
 }
@@ -495,7 +496,7 @@ func (p *parser) expectChar(c *instruction, ch string) error {
 	if lit != ch {
 		line, _ := p.s.r.ReadString('\n')
 		c.literal += line
-		return fmt.Errorf("Expected '%s', found '%s'", ch, lit)
+		return tracerr.Wrap(fmt.Errorf("Expected '%s', found '%s'", ch, lit))
 	}
 	return nil
 }
@@ -512,12 +513,12 @@ func (p *parser) parse() (*parsedSet, error) {
 	for {
 		i++
 		instruction, err := p.parseLine(ps.typ)
-		if err == errof {
+		if tracerr.Unwrap(err) == errof {
 			break
 		}
-		if err == setTypeLine {
+		if tracerr.Unwrap(err) == setTypeLine {
 			if ps.typ != "" {
-				return ps, fmt.Errorf("Line %d: Instruction of 'Type: %s' when there is already a previous instruction 'Type: %s' defined", i, instruction.typ, ps.typ)
+				return ps, tracerr.Wrap(fmt.Errorf("Line %d: Instruction of 'Type: %s' when there is already a previous instruction 'Type: %s' defined", i, instruction.typ, ps.typ))
 			}
 			if instruction.typ == "PoolL2" {
 				ps.typ = setTypePoolL2
@@ -528,22 +529,22 @@ func (p *parser) parse() (*parsedSet, error) {
 			}
 			continue
 		}
-		if err == commentLine {
+		if tracerr.Unwrap(err) == commentLine {
 			continue
 		}
 		instruction.lineNum = i
-		if err == newEventLine {
+		if tracerr.Unwrap(err) == newEventLine {
 			if instruction.typ == typeAddToken && instruction.tokenID == common.TokenID(0) {
-				return ps, fmt.Errorf("Line %d: AddToken can not register TokenID 0", i)
+				return ps, tracerr.Wrap(fmt.Errorf("Line %d: AddToken can not register TokenID 0", i))
 			}
 			ps.instructions = append(ps.instructions, *instruction)
 			continue
 		}
 		if err != nil {
-			return ps, fmt.Errorf("Line %d: %s, err: %s", i, instruction.literal, err.Error())
+			return ps, tracerr.Wrap(fmt.Errorf("Line %d: %s, err: %s", i, instruction.literal, err.Error()))
 		}
 		if ps.typ == "" {
-			return ps, fmt.Errorf("Line %d: Set type not defined", i)
+			return ps, tracerr.Wrap(fmt.Errorf("Line %d: Set type not defined", i))
 		}
 		ps.instructions = append(ps.instructions, *instruction)
 		users[instruction.from] = true

test/til/txs.go

@@ -12,6 +12,7 @@ import (
 	ethCrypto "github.com/ethereum/go-ethereum/crypto"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
@@ -151,10 +152,10 @@ func (tc *Context) GenerateBlocks(set string) ([]common.BlockData, error) {
 	parser := newParser(strings.NewReader(set))
 	parsedSet, err := parser.parse()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	if parsedSet.typ != setTypeBlockchain {
-		return nil, fmt.Errorf("Expected set type: %s, found: %s", setTypeBlockchain, parsedSet.typ)
+		return nil, tracerr.Wrap(fmt.Errorf("Expected set type: %s, found: %s", setTypeBlockchain, parsedSet.typ))
 	}
 
 	tc.Instructions = parsedSet.instructions
@@ -168,7 +169,7 @@ func (tc *Context) GenerateBlocks(set string) ([]common.BlockData, error) {
 		case txTypeCreateAccountDepositCoordinator: // tx source: L1CoordinatorTx
 			if err := tc.checkIfTokenIsRegistered(inst); err != nil {
 				log.Error(err)
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			tx := common.L1Tx{
 				FromEthAddr: tc.Users[inst.from].Addr,
@@ -188,7 +189,7 @@ func (tc *Context) GenerateBlocks(set string) ([]common.BlockData, error) {
 		case common.TxTypeCreateAccountDeposit, common.TxTypeCreateAccountDepositTransfer: // tx source: L1UserTx
 			if err := tc.checkIfTokenIsRegistered(inst); err != nil {
 				log.Error(err)
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			tx := common.L1Tx{
 				FromEthAddr: tc.Users[inst.from].Addr,
@@ -208,16 +209,16 @@ func (tc *Context) GenerateBlocks(set string) ([]common.BlockData, error) {
 				L1Tx:        tx,
 			}
 			if err := tc.addToL1UserQueue(testTx); err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 		case common.TxTypeDeposit, common.TxTypeDepositTransfer: // tx source: L1UserTx
 			if err := tc.checkIfTokenIsRegistered(inst); err != nil {
 				log.Error(err)
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			if err := tc.checkIfAccountExists(inst.from, inst); err != nil {
 				log.Error(err)
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			tx := common.L1Tx{
 				TokenID:    inst.tokenID,
@@ -235,12 +236,12 @@ func (tc *Context) GenerateBlocks(set string) ([]common.BlockData, error) {
 				L1Tx:        tx,
 			}
 			if err := tc.addToL1UserQueue(testTx); err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 		case common.TxTypeTransfer: // L2Tx
 			if err := tc.checkIfTokenIsRegistered(inst); err != nil {
 				log.Error(err)
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			tx := common.L2Tx{
 				Amount:      inst.amount,
@@ -260,7 +261,7 @@ func (tc *Context) GenerateBlocks(set string) ([]common.BlockData, error) {
 		case common.TxTypeForceTransfer: // tx source: L1UserTx
 			if err := tc.checkIfTokenIsRegistered(inst); err != nil {
 				log.Error(err)
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			tx := common.L1Tx{
 				TokenID:    inst.tokenID,
@@ -275,12 +276,12 @@ func (tc *Context) GenerateBlocks(set string) ([]common.BlockData, error) {
 				L1Tx:        tx,
 			}
 			if err := tc.addToL1UserQueue(testTx); err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 		case common.TxTypeExit: // tx source: L2Tx
 			if err := tc.checkIfTokenIsRegistered(inst); err != nil {
 				log.Error(err)
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			tx := common.L2Tx{
 				ToIdx:       common.Idx(1), // as is an Exit
@@ -301,7 +302,7 @@ func (tc *Context) GenerateBlocks(set string) ([]common.BlockData, error) {
 		case common.TxTypeForceExit: // tx source: L1UserTx
 			if err := tc.checkIfTokenIsRegistered(inst); err != nil {
 				log.Error(err)
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			tx := common.L1Tx{
 				ToIdx:      common.Idx(1), // as is an Exit
@@ -317,28 +318,28 @@ func (tc *Context) GenerateBlocks(set string) ([]common.BlockData, error) {
 				L1Tx:        tx,
 			}
 			if err := tc.addToL1UserQueue(testTx); err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 		case typeNewBatch:
 			if err = tc.calculateIdxForL1Txs(true, tc.currBatchTest.l1CoordinatorTxs); err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			if err = tc.setIdxs(); err != nil {
 				log.Error(err)
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 		case typeNewBatchL1:
 			// for each L1UserTx of the Queues[ToForgeNum], calculate the Idx
 			if err = tc.calculateIdxForL1Txs(false, tc.Queues[tc.ToForgeNum]); err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			if err = tc.calculateIdxForL1Txs(true, tc.currBatchTest.l1CoordinatorTxs); err != nil {
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			tc.currBatch.L1Batch = true
 			if err = tc.setIdxs(); err != nil {
 				log.Error(err)
-				return nil, err
+				return nil, tracerr.Wrap(err)
 			}
 			toForgeL1TxsNum := int64(tc.openToForge)
 			tc.currBatch.Batch.ForgeL1TxsNum = &toForgeL1TxsNum
@@ -363,12 +364,12 @@ func (tc *Context) GenerateBlocks(set string) ([]common.BlockData, error) {
 				EthBlockNum: tc.blockNum,
 			}
 			if inst.tokenID != tc.LastRegisteredTokenID+1 {
-				return nil, fmt.Errorf("Line %d: AddToken TokenID should be sequential, expected TokenID: %d, defined TokenID: %d", inst.lineNum, tc.LastRegisteredTokenID+1, inst.tokenID)
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: AddToken TokenID should be sequential, expected TokenID: %d, defined TokenID: %d", inst.lineNum, tc.LastRegisteredTokenID+1, inst.tokenID))
 			}
 			tc.LastRegisteredTokenID++
 			tc.currBlock.Rollup.AddedTokens = append(tc.currBlock.Rollup.AddedTokens, newToken)
 		default:
-			return nil, fmt.Errorf("Line %d: Unexpected type: %s", inst.lineNum, inst.typ)
+			return nil, tracerr.Wrap(fmt.Errorf("Line %d: Unexpected type: %s", inst.lineNum, inst.typ))
 		}
 	}
 
@@ -383,7 +384,7 @@ func (tc *Context) calculateIdxForL1Txs(isCoordinatorTxs bool, txs []L1Tx) error
 		tx := txs[i]
 		if tx.L1Tx.Type == common.TxTypeCreateAccountDeposit || tx.L1Tx.Type == common.TxTypeCreateAccountDepositTransfer {
 			if tc.Users[tx.fromIdxName].Accounts[tx.L1Tx.TokenID] != nil { // if account already exists, return error
-				return fmt.Errorf("Can not create same account twice (same User (%s) & same TokenID (%d)) (this is a design property of Til)", tx.fromIdxName, tx.L1Tx.TokenID)
+				return tracerr.Wrap(fmt.Errorf("Can not create same account twice (same User (%s) & same TokenID (%d)) (this is a design property of Til)", tx.fromIdxName, tx.L1Tx.TokenID))
 			}
 			tc.Users[tx.fromIdxName].Accounts[tx.L1Tx.TokenID] = &Account{
 				Idx:      common.Idx(tc.idx),
@@ -410,11 +411,11 @@ func (tc *Context) setIdxs() error {
 		testTx := &tc.currBatchTest.l2Txs[i]
 
 		if tc.Users[testTx.fromIdxName].Accounts[testTx.tokenID] == nil {
-			return fmt.Errorf("Line %d: %s from User %s for TokenID %d while account not created yet", testTx.lineNum, testTx.L2Tx.Type, testTx.fromIdxName, testTx.tokenID)
+			return tracerr.Wrap(fmt.Errorf("Line %d: %s from User %s for TokenID %d while account not created yet", testTx.lineNum, testTx.L2Tx.Type, testTx.fromIdxName, testTx.tokenID))
 		}
 		if testTx.L2Tx.Type == common.TxTypeTransfer {
 			if _, ok := tc.l1CreatedAccounts[idxTokenIDToString(testTx.toIdxName, testTx.tokenID)]; !ok {
-				return fmt.Errorf("Line %d: Can not create Transfer for a non existing account. Batch %d, ToIdx name: %s, TokenID: %d", testTx.lineNum, tc.currBatchNum, testTx.toIdxName, testTx.tokenID)
+				return tracerr.Wrap(fmt.Errorf("Line %d: Can not create Transfer for a non existing account. Batch %d, ToIdx name: %s, TokenID: %d", testTx.lineNum, tc.currBatchNum, testTx.toIdxName, testTx.tokenID))
 			}
 		}
 		tc.Users[testTx.fromIdxName].Accounts[testTx.tokenID].Nonce++
@@ -433,7 +434,7 @@ func (tc *Context) setIdxs() error {
 
 		nTx, err := common.NewL2Tx(&testTx.L2Tx)
 		if err != nil {
-			return fmt.Errorf("Line %d: %s", testTx.lineNum, err.Error())
+			return tracerr.Wrap(fmt.Errorf("Line %d: %s", testTx.lineNum, err.Error()))
 		}
 		testTx.L2Tx = *nTx
 
@@ -476,8 +477,8 @@ func (tc *Context) addToL1UserQueue(tx L1Tx) error {
 	} else {
 		account, ok := tc.Users[tx.toIdxName].Accounts[tx.L1Tx.TokenID]
 		if !ok {
-			return fmt.Errorf("Line %d: Transfer to User: %s, for TokenID: %d, "+
+			return tracerr.Wrap(fmt.Errorf("Line %d: Transfer to User: %s, for TokenID: %d, "+
-				"while account not created yet", tx.lineNum, tx.toIdxName, tx.L1Tx.TokenID)
+				"while account not created yet", tx.lineNum, tx.toIdxName, tx.L1Tx.TokenID))
 		}
 		tx.L1Tx.ToIdx = account.Idx
 	}
@@ -486,7 +487,7 @@ func (tc *Context) addToL1UserQueue(tx L1Tx) error {
 	}
 	nTx, err := common.NewL1Tx(&tx.L1Tx)
 	if err != nil {
-		return fmt.Errorf("Line %d: %s", tx.lineNum, err.Error())
+		return tracerr.Wrap(fmt.Errorf("Line %d: %s", tx.lineNum, err.Error()))
 	}
 	tx.L1Tx = *nTx
 
@@ -498,13 +499,13 @@ func (tc *Context) addToL1UserQueue(tx L1Tx) error {
 
 func (tc *Context) checkIfAccountExists(tf string, inst instruction) error {
 	if tc.Users[tf].Accounts[inst.tokenID] == nil {
-		return fmt.Errorf("%s at User: %s, for TokenID: %d, while account not created yet", inst.typ, tf, inst.tokenID)
+		return tracerr.Wrap(fmt.Errorf("%s at User: %s, for TokenID: %d, while account not created yet", inst.typ, tf, inst.tokenID))
 	}
 	return nil
 }
 func (tc *Context) checkIfTokenIsRegistered(inst instruction) error {
 	if inst.tokenID > tc.LastRegisteredTokenID {
-		return fmt.Errorf("Can not process %s: TokenID %d not registered, last registered TokenID: %d", inst.typ, inst.tokenID, tc.LastRegisteredTokenID)
+		return tracerr.Wrap(fmt.Errorf("Can not process %s: TokenID %d not registered, last registered TokenID: %d", inst.typ, inst.tokenID, tc.LastRegisteredTokenID))
 	}
 	return nil
 }
@@ -515,10 +516,10 @@ func (tc *Context) GeneratePoolL2Txs(set string) ([]common.PoolL2Tx, error) {
 	parser := newParser(strings.NewReader(set))
 	parsedSet, err := parser.parse()
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 	if parsedSet.typ != setTypePoolL2 {
-		return nil, fmt.Errorf("Expected set type: %s, found: %s", setTypePoolL2, parsedSet.typ)
+		return nil, tracerr.Wrap(fmt.Errorf("Expected set type: %s, found: %s", setTypePoolL2, parsedSet.typ))
 	}
 
 	tc.Instructions = parsedSet.instructions
@@ -532,13 +533,13 @@ func (tc *Context) GeneratePoolL2Txs(set string) ([]common.PoolL2Tx, error) {
 		case common.TxTypeTransfer, common.TxTypeTransferToEthAddr, common.TxTypeTransferToBJJ:
 			if err := tc.checkIfAccountExists(inst.from, inst); err != nil {
 				log.Error(err)
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			if inst.typ == common.TxTypeTransfer {
 				// if TxTypeTransfer, need to exist the ToIdx account
 				if err := tc.checkIfAccountExists(inst.to, inst); err != nil {
 					log.Error(err)
-					return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+					return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 				}
 			}
 			tc.Users[inst.from].Accounts[inst.tokenID].Nonce++
@@ -570,13 +571,13 @@ func (tc *Context) GeneratePoolL2Txs(set string) ([]common.PoolL2Tx, error) {
 			}
 			nTx, err := common.NewPoolL2Tx(&tx)
 			if err != nil {
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			tx = *nTx
 			// perform signature and set it to tx.Signature
 			toSign, err := tx.HashToSign()
 			if err != nil {
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			sig := tc.Users[inst.from].BJJ.SignPoseidon(toSign)
 			tx.Signature = sig.Compress()
@@ -596,19 +597,19 @@ func (tc *Context) GeneratePoolL2Txs(set string) ([]common.PoolL2Tx, error) {
 			}
 			nTx, err := common.NewPoolL2Tx(&tx)
 			if err != nil {
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			tx = *nTx
 			// perform signature and set it to tx.Signature
 			toSign, err := tx.HashToSign()
 			if err != nil {
-				return nil, fmt.Errorf("Line %d: %s", inst.lineNum, err.Error())
+				return nil, tracerr.Wrap(fmt.Errorf("Line %d: %s", inst.lineNum, err.Error()))
 			}
 			sig := tc.Users[inst.from].BJJ.SignPoseidon(toSign)
 			tx.Signature = sig.Compress()
 			txs = append(txs, tx)
 		default:
-			return nil, fmt.Errorf("Line %d: instruction type unrecognized: %s", inst.lineNum, inst.typ)
+			return nil, tracerr.Wrap(fmt.Errorf("Line %d: instruction type unrecognized: %s", inst.lineNum, inst.typ))
 		}
 	}
 
@@ -750,7 +751,7 @@ func (tc *Context) FillBlocksExtra(blocks []common.BlockData, cfg *ConfigExtra)
 					tx.Type == common.TxTypeCreateAccountDepositTransfer {
 					user, ok := tc.UsersByIdx[tc.extra.idx]
 					if !ok {
-						return fmt.Errorf("Created account with idx: %v not found", tc.extra.idx)
+						return tracerr.Wrap(fmt.Errorf("Created account with idx: %v not found", tc.extra.idx))
 					}
 					batch.CreatedAccounts = append(batch.CreatedAccounts,
 						common.Account{
@@ -785,7 +786,7 @@ func (tc *Context) FillBlocksExtra(blocks []common.BlockData, cfg *ConfigExtra)
 				tx.EffectiveLoadAmount = big.NewInt(0)
 				nTx, err := common.NewL1Tx(tx)
 				if err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				*tx = *nTx
 			}
@@ -797,7 +798,7 @@ func (tc *Context) FillBlocksExtra(blocks []common.BlockData, cfg *ConfigExtra)
 				tx.Nonce = tc.extra.nonces[tx.FromIdx]
 				nTx, err := common.NewL2Tx(tx)
 				if err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 				*tx = *nTx
 			}
@@ -834,13 +835,13 @@ func (tc *Context) FillBlocksExtra(blocks []common.BlockData, cfg *ConfigExtra)
 				}
 				fee, err := common.CalcFeeAmount(tx.Amount, tx.Fee)
 				if err != nil {
-					return err
+					return tracerr.Wrap(err)
 				}
 
 				// Find the TokenID of the tx
 				fromAcc, ok := tc.accountsByIdx[int(tx.FromIdx)]
 				if !ok {
-					return fmt.Errorf("L2tx.FromIdx idx: %v not found", tx.FromIdx)
+					return tracerr.Wrap(fmt.Errorf("L2tx.FromIdx idx: %v not found", tx.FromIdx))
 				}
 
 				// Find the idx of the CoordUser for the

txselector/txselector.go

@@ -12,6 +12,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/l2db"
 	"github.com/hermeznetwork/hermez-node/db/statedb"
 	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/tracerr"
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
@@ -45,7 +46,7 @@ type TxSelector struct {
 func NewTxSelector(dbpath string, synchronizerStateDB *statedb.StateDB, l2 *l2db.L2DB, maxL1UserTxs, maxL1OperatorTxs, maxTxs uint64) (*TxSelector, error) {
 	localAccountsDB, err := statedb.NewLocalStateDB(dbpath, synchronizerStateDB, statedb.TypeTxSelector, 0) // without merkletree
 	if err != nil {
-		return nil, err
+		return nil, tracerr.Wrap(err)
 	}
 
 	return &TxSelector{
@@ -62,7 +63,7 @@ func NewTxSelector(dbpath string, synchronizerStateDB *statedb.StateDB, l2 *l2db
 func (txsel *TxSelector) Reset(batchNum common.BatchNum) error {
 	err := txsel.localAccountsDB.Reset(batchNum, true)
 	if err != nil {
-		return err
+		return tracerr.Wrap(err)
 	}
 	return nil
 }
@@ -71,7 +72,7 @@ func (txsel *TxSelector) Reset(batchNum common.BatchNum) error {
 // for the next batch, from the L2DB pool
 func (txsel *TxSelector) GetL2TxSelection(coordIdxs []common.Idx, batchNum common.BatchNum) ([]common.L1Tx, []common.PoolL2Tx, error) {
 	_, l1CoordinatorTxs, l2Txs, err := txsel.GetL1L2TxSelection(coordIdxs, batchNum, []common.L1Tx{})
-	return l1CoordinatorTxs, l2Txs, err
+	return l1CoordinatorTxs, l2Txs, tracerr.Wrap(err)
 }
 
 // GetL1L2TxSelection returns the selection of L1 + L2 txs
@@ -84,7 +85,7 @@ func (txsel *TxSelector) GetL1L2TxSelection(coordIdxs []common.Idx, batchNum com
 	// get pending l2-tx from tx-pool
 	l2TxsRaw, err := txsel.l2db.GetPendingTxs() // (batchID)
 	if err != nil {
-		return nil, nil, nil, err
+		return nil, nil, nil, tracerr.Wrap(err)
 	}
 
 	var validTxs txs
@@ -224,11 +225,11 @@ func (txsel *TxSelector) GetL1L2TxSelection(coordIdxs []common.Idx, batchNum com
 	// process the txs in the local AccountsDB
 	_, err = txsel.localAccountsDB.ProcessTxs(ptc, coordIdxs, l1Txs, l1CoordinatorTxs, l2Txs)
 	if err != nil {
-		return nil, nil, nil, err
+		return nil, nil, nil, tracerr.Wrap(err)
 	}
 	err = txsel.localAccountsDB.MakeCheckpoint()
 	if err != nil {
-		return nil, nil, nil, err
+		return nil, nil, nil, tracerr.Wrap(err)
 	}
 
 	return l1Txs, l1CoordinatorTxs, l2Txs, nil