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 &&
-			err != http.ErrServerClosed {
+		if err := server.ListenAndServe(); err != nil && tracerr.Unwrap(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,
-			errors.New("bjj and hermezEthereumAddress params are incompatible")
+		return nil, nil, nil, nil, tracerr.Wrap(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,
-			errors.New("accountIndex is incompatible with BJJ, hermezEthereumAddress and tokenId")
+		return nil, nil, nil, nil, tracerr.Wrap(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,
-			errors.New("bjj and hermezEthereumAddress params are incompatible")
+		return nil, nil, nil, tracerr.Wrap(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(
-			"invalid %s, must follow this: hez:<tokenSymbol>:index", name)
+		return nil, tracerr.Wrap(fmt.Errorf(
+			"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(
-			"Invalid %s, must follow this regex: ^hez:0x[a-fA-F0-9]{40}$", name)
+		return nil, tracerr.Wrap(fmt.Errorf(
+			"Invalid %s, must follow this regex: ^hez:0x[a-fA-F0-9]{40}$", 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",
-			name)
+		return nil, tracerr.Wrap(fmt.Errorf("invalid %s, checksum failed",
+			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
 }