Merge pull request #263 from hermeznetwork/feature/wrapped-in-struct

Put api DBs into struct

api/account.go

@@ -9,21 +9,21 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 )
 
-func getAccount(c *gin.Context) {
+func (a *API) getAccount(c *gin.Context) {
 	// Get Addr
 	idx, err := parseParamIdx(c)
 	if err != nil {
 		retBadReq(err, c)
 		return
 	}
-	apiAccount, err := h.GetAccountAPI(*idx)
+	apiAccount, err := a.h.GetAccountAPI(*idx)
 	if err != nil {
 		retSQLErr(err, c)
 		return
 	}
 
 	// Get balance from stateDB
-	account, err := s.GetAccount(*idx)
+	account, err := a.s.GetAccount(*idx)
 	if err != nil {
 		retSQLErr(err, c)
 		return
@@ -34,7 +34,7 @@ func getAccount(c *gin.Context) {
 	c.JSON(http.StatusOK, apiAccount)
 }
 
-func getAccounts(c *gin.Context) {
+func (a *API) getAccounts(c *gin.Context) {
 	// Account filters
 	tokenIDs, addr, bjj, err := parseAccountFilters(c)
 	if err != nil {
@@ -49,7 +49,7 @@ func getAccounts(c *gin.Context) {
 	}
 
 	// Fetch Accounts from historyDB
-	apiAccounts, pagination, err := h.GetAccountsAPI(tokenIDs, addr, bjj, fromItem, limit, order)
+	apiAccounts, pagination, err := a.h.GetAccountsAPI(tokenIDs, addr, bjj, fromItem, limit, order)
 	if err != nil {
 		retSQLErr(err, c)
 		return
@@ -62,7 +62,7 @@ func getAccounts(c *gin.Context) {
 			retSQLErr(err, c)
 			return
 		}
-		account, err := s.GetAccount(*idx)
+		account, err := a.s.GetAccount(*idx)
 		if err != nil {
 			retSQLErr(err, c)
 			return

api/accountcreationauths.go

@@ -12,7 +12,7 @@ import (
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
-func postAccountCreationAuth(c *gin.Context) {
+func (a *API) postAccountCreationAuth(c *gin.Context) {
 	// Parse body
 	var apiAuth receivedAuth
 	if err := c.ShouldBindJSON(&apiAuth); err != nil {
@@ -26,7 +26,7 @@ func postAccountCreationAuth(c *gin.Context) {
 		return
 	}
 	// Insert to DB
-	if err := l2.AddAccountCreationAuth(commonAuth); err != nil {
+	if err := a.l2.AddAccountCreationAuth(commonAuth); err != nil {
 		retSQLErr(err, c)
 		return
 	}
@@ -34,7 +34,7 @@ func postAccountCreationAuth(c *gin.Context) {
 	c.Status(http.StatusOK)
 }
 
-func getAccountCreationAuth(c *gin.Context) {
+func (a *API) getAccountCreationAuth(c *gin.Context) {
 	// Get hezEthereumAddress
 	addr, err := parseParamHezEthAddr(c)
 	if err != nil {
@@ -42,7 +42,7 @@ func getAccountCreationAuth(c *gin.Context) {
 		return
 	}
 	// Fetch auth from l2DB
-	auth, err := l2.GetAccountCreationAuthAPI(*addr)
+	auth, err := a.l2.GetAccountCreationAuthAPI(*addr)
 	if err != nil {
 		retSQLErr(err, c)
 		return

api/api.go

@@ -4,75 +4,90 @@ import (
 	"errors"
 
 	"github.com/gin-gonic/gin"
+	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 	"github.com/hermeznetwork/hermez-node/db/l2db"
 	"github.com/hermeznetwork/hermez-node/db/statedb"
 )
 
-var h *historydb.HistoryDB
-var cg *configAPI
-var s *statedb.StateDB
-var l2 *l2db.L2DB
+// Status define status of the network
+type Status struct {
+	Network           historydb.Network        `json:"network"`
+	Metrics           historydb.Metrics        `json:"metrics"`
+	Rollup            common.RollupVariables   `json:"rollup"`
+	Auction           common.AuctionVariables  `json:"auction"`
+	WithdrawalDelayer common.WDelayerVariables `json:"withdrawalDelayer"`
+	RecommendedFee    common.RecommendedFee    `json:"recommendedFee"`
+}
+
+// API serves HTTP requests to allow external interaction with the Hermez node
+type API struct {
+	h      *historydb.HistoryDB
+	cg     *configAPI
+	s      *statedb.StateDB
+	l2     *l2db.L2DB
+	status Status
+}
 
-// SetAPIEndpoints sets the endpoints and the appropriate handlers, but doesn't start the server
-func SetAPIEndpoints(
+// NewAPI sets the endpoints and the appropriate handlers, but doesn't start the server
+func NewAPI(
 	coordinatorEndpoints, explorerEndpoints bool,
 	server *gin.Engine,
 	hdb *historydb.HistoryDB,
 	sdb *statedb.StateDB,
 	l2db *l2db.L2DB,
 	config *configAPI,
-) error {
+) (*API, error) {
 	// Check input
 	// TODO: is stateDB only needed for explorer endpoints or for both?
 	if coordinatorEndpoints && l2db == nil {
-		return errors.New("cannot serve Coordinator endpoints without L2DB")
+		return nil, errors.New("cannot serve Coordinator endpoints without L2DB")
 	}
 	if explorerEndpoints && hdb == nil {
-		return errors.New("cannot serve Explorer endpoints without HistoryDB")
+		return nil, errors.New("cannot serve Explorer endpoints without HistoryDB")
 	}
 
-	h = hdb
-	cg = config
-	s = sdb
-	l2 = l2db
+	a := &API{
+		h:  hdb,
+		cg: config,
+		s:  sdb,
+		l2: l2db,
+	}
 
 	// Add coordinator endpoints
 	if coordinatorEndpoints {
 		// Account
-		server.POST("/account-creation-authorization", postAccountCreationAuth)
-		server.GET("/account-creation-authorization/:hermezEthereumAddress", getAccountCreationAuth)
+		server.POST("/account-creation-authorization", a.postAccountCreationAuth)
+		server.GET("/account-creation-authorization/:hermezEthereumAddress", a.getAccountCreationAuth)
 		// Transaction
-		server.POST("/transactions-pool", postPoolTx)
-		server.GET("/transactions-pool/:id", getPoolTx)
+		server.POST("/transactions-pool", a.postPoolTx)
+		server.GET("/transactions-pool/:id", a.getPoolTx)
 	}
 
 	// Add explorer endpoints
 	if explorerEndpoints {
 		// Account
-		server.GET("/accounts", getAccounts)
-		server.GET("/accounts/:accountIndex", getAccount)
-		server.GET("/exits", getExits)
-		server.GET("/exits/:batchNum/:accountIndex", getExit)
+		server.GET("/accounts", a.getAccounts)
+		server.GET("/accounts/:accountIndex", a.getAccount)
+		server.GET("/exits", a.getExits)
+		server.GET("/exits/:batchNum/:accountIndex", a.getExit)
 		// Transaction
-		server.GET("/transactions-history", getHistoryTxs)
-		server.GET("/transactions-history/:id", getHistoryTx)
+		server.GET("/transactions-history", a.getHistoryTxs)
+		server.GET("/transactions-history/:id", a.getHistoryTx)
 		// Status
-		server.GET("/batches", getBatches)
-		server.GET("/batches/:batchNum", getBatch)
-		server.GET("/full-batches/:batchNum", getFullBatch)
-		server.GET("/slots", getSlots)
-		server.GET("/slots/:slotNum", getSlot)
-		server.GET("/bids", getBids)
-		server.GET("/next-forgers", getNextForgers)
-		server.GET("/state", getState)
-		server.GET("/config", getConfig)
-		server.GET("/tokens", getTokens)
-		server.GET("/tokens/:id", getToken)
-		server.GET("/recommendedFee", getRecommendedFee)
-		server.GET("/coordinators", getCoordinators)
-		server.GET("/coordinators/:bidderAddr", getCoordinator)
+		server.GET("/batches", a.getBatches)
+		server.GET("/batches/:batchNum", a.getBatch)
+		server.GET("/full-batches/:batchNum", a.getFullBatch)
+		server.GET("/slots", a.getSlots)
+		server.GET("/slots/:slotNum", a.getSlot)
+		server.GET("/bids", a.getBids)
+		server.GET("/state", a.getState)
+		server.GET("/config", a.getConfig)
+		server.GET("/tokens", a.getTokens)
+		server.GET("/tokens/:id", a.getToken)
+		server.GET("/coordinators", a.getCoordinators)
+		server.GET("/coordinators/:bidderAddr", a.getCoordinator)
 	}
 
-	return nil
+	return a, nil
 }

api/api_test.go

@@ -56,6 +56,7 @@ type testCommon struct {
 
 var tc testCommon
 var config configAPI
+var api *API
 
 // TestMain initializes the API server, and fill HistoryDB and StateDB with fake data,
 // emulating the task of the synchronizer in order to have data to be returned
@@ -97,20 +98,21 @@ func TestMain(m *testing.M) {
 	config = getConfigTest()
 
 	// API
-	api := gin.Default()
-	if err := SetAPIEndpoints(
+	apiGin := gin.Default()
+	api, err = NewAPI(
 		true,
 		true,
-		api,
+		apiGin,
 		hdb,
 		sdb,
 		l2DB,
 		&config,
-	); err != nil {
+	)
+	if err != nil {
 		panic(err)
 	}
 	// Start server
-	server := &http.Server{Addr: apiPort, Handler: api}
+	server := &http.Server{Addr: apiPort, Handler: apiGin}
 	go func() {
 		if err := server.ListenAndServe(); err != nil &&
 			err != http.ErrServerClosed {
@@ -122,7 +124,7 @@ func TestMain(m *testing.M) {
 	// Gen blocks and add them to DB
 	const nBlocks = 5
 	blocks := test.GenBlocks(1, nBlocks+1)
-	err = h.AddBlocks(blocks)
+	err = api.h.AddBlocks(blocks)
 	if err != nil {
 		panic(err)
 	}
@@ -131,7 +133,7 @@ func TestMain(m *testing.M) {
 	// Gen tokens and add them to DB
 	const nTokens = 10
 	tokens, ethToken := test.GenTokens(nTokens, blocks)
-	err = h.AddTokens(tokens)
+	err = api.h.AddTokens(tokens)
 	if err != nil {
 		panic(err)
 	}
@@ -153,7 +155,7 @@ func TestMain(m *testing.M) {
 			now := time.Now().UTC()
 			token.USD = &value
 			token.USDUpdate = &now
-			err = h.UpdateTokenValue(token.Symbol, value)
+			err = api.h.UpdateTokenValue(token.Symbol, value)
 			if err != nil {
 				panic(err)
 			}
@@ -163,7 +165,7 @@ func TestMain(m *testing.M) {
 	// Gen batches and add them to DB
 	const nBatches = 10
 	batches := test.GenBatches(nBatches, blocks)
-	err = h.AddBatches(batches)
+	err = api.h.AddBatches(batches)
 	if err != nil {
 		panic(err)
 	}
@@ -174,12 +176,12 @@ func TestMain(m *testing.M) {
 	privK := babyjub.NewRandPrivKey()
 	usrBjj := privK.Public()
 	accs := test.GenAccounts(totalAccounts, userAccounts, tokens, &usrAddr, usrBjj, batches)
-	err = h.AddAccounts(accs)
+	err = api.h.AddAccounts(accs)
 	if err != nil {
 		panic(err)
 	}
 	for i := 0; i < len(accs); i++ {
-		if _, err := s.CreateAccount(accs[i].Idx, &accs[i]); err != nil {
+		if _, err := api.s.CreateAccount(accs[i].Idx, &accs[i]); err != nil {
 			panic(err)
 		}
 	}
@@ -197,7 +199,7 @@ func TestMain(m *testing.M) {
 	// Gen exits and add them to DB
 	const totalExits = 40
 	exits := test.GenExitTree(totalExits, batches, accs)
-	err = h.AddExitTree(exits)
+	err = api.h.AddExitTree(exits)
 	if err != nil {
 		panic(err)
 	}
@@ -235,12 +237,12 @@ func TestMain(m *testing.M) {
 		l1 := genericTx.L1()
 		l2 := genericTx.L2()
 		if l1 != nil {
-			err = h.AddL1Txs([]common.L1Tx{*l1})
+			err = api.h.AddL1Txs([]common.L1Tx{*l1})
 			if err != nil {
 				panic(err)
 			}
 		} else if l2 != nil {
-			err = h.AddL2Txs([]common.L2Tx{*l2})
+			err = api.h.AddL2Txs([]common.L2Tx{*l2})
 			if err != nil {
 				panic(err)
 			}
@@ -252,13 +254,13 @@ func TestMain(m *testing.M) {
 	// Coordinators
 	const nCoords = 10
 	coords := test.GenCoordinators(nCoords, blocks)
-	err = hdb.AddCoordinators(coords)
+	err = api.h.AddCoordinators(coords)
 	if err != nil {
 		panic(err)
 	}
 	fromItem := uint(0)
 	limit := uint(99999)
-	coordinators, _, err := hdb.GetCoordinatorsAPI(&fromItem, &limit, historydb.OrderAsc)
+	coordinators, _, err := api.h.GetCoordinatorsAPI(&fromItem, &limit, historydb.OrderAsc)
 	if err != nil {
 		panic(err)
 	}
@@ -266,7 +268,7 @@ func TestMain(m *testing.M) {
 	// Bids
 	const nBids = 20
 	bids := test.GenBids(nBids, blocks, coords)
-	err = hdb.AddBids(bids)
+	err = api.h.AddBids(bids)
 	if err != nil {
 		panic(err)
 	}
@@ -278,7 +280,7 @@ func TestMain(m *testing.M) {
 		ClosedAuctionSlots: uint16(2),
 		OpenAuctionSlots:   uint16(5),
 	}
-	err = hdb.AddAuctionVars(&auctionVars)
+	err = api.h.AddAuctionVars(&auctionVars)
 	if err != nil {
 		panic(err)
 	}
@@ -309,7 +311,7 @@ func TestMain(m *testing.M) {
 		auths:            genTestAuths(test.GenAuths(5)),
 		router:           router,
 		bids:             testBids,
-		slots:            genTestSlots(nSlots, lastBlockNum, testBids, auctionVars),
+		slots:            api.genTestSlots(nSlots, lastBlockNum, testBids, auctionVars),
 		auctionVars:      auctionVars,
 	}
 

api/batch.go

@@ -10,7 +10,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 )
 
-func getBatches(c *gin.Context) {
+func (a *API) getBatches(c *gin.Context) {
 	// Get query parameters
 	// minBatchNum
 	minBatchNum, err := parseQueryUint("minBatchNum", nil, 0, maxUint32, c)
@@ -43,7 +43,7 @@ func getBatches(c *gin.Context) {
 		return
 	}
 	// Fetch batches from historyDB
-	batches, pagination, err := h.GetBatchesAPI(
+	batches, pagination, err := a.h.GetBatchesAPI(
 		minBatchNum, maxBatchNum, slotNum, forgerAddr, fromItem, limit, order,
 	)
 	if err != nil {
@@ -62,7 +62,7 @@ func getBatches(c *gin.Context) {
 	})
 }
 
-func getBatch(c *gin.Context) {
+func (a *API) getBatch(c *gin.Context) {
 	// Get batchNum
 	batchNum, err := parseParamUint("batchNum", nil, 0, maxUint32, c)
 	if err != nil {
@@ -74,7 +74,7 @@ func getBatch(c *gin.Context) {
 		return
 	}
 	// Fetch batch from historyDB
-	batch, err := h.GetBatchAPI(common.BatchNum(*batchNum))
+	batch, err := a.h.GetBatchAPI(common.BatchNum(*batchNum))
 	if err != nil {
 		retSQLErr(err, c)
 		return
@@ -88,7 +88,7 @@ type fullBatch struct {
 	Txs   []historydb.TxAPI   `json:"transactions"`
 }
 
-func getFullBatch(c *gin.Context) {
+func (a *API) getFullBatch(c *gin.Context) {
 	// Get batchNum
 	batchNum, err := parseParamUint("batchNum", nil, 0, maxUint32, c)
 	if err != nil {
@@ -100,14 +100,14 @@ func getFullBatch(c *gin.Context) {
 		return
 	}
 	// Fetch batch from historyDB
-	batch, err := h.GetBatchAPI(common.BatchNum(*batchNum))
+	batch, err := a.h.GetBatchAPI(common.BatchNum(*batchNum))
 	if err != nil {
 		retSQLErr(err, c)
 		return
 	}
 	// Fetch txs forged in the batch from historyDB
 	maxTxsPerBatch := uint(2048) //nolint:gomnd
-	txs, _, err := h.GetHistoryTxs(
+	txs, _, err := a.h.GetHistoryTxs(
 		nil, nil, nil, nil, batchNum, nil, nil, &maxTxsPerBatch, historydb.OrderAsc,
 	)
 	if err != nil {

api/bids.go

@@ -9,7 +9,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 )
 
-func getBids(c *gin.Context) {
+func (a *API) getBids(c *gin.Context) {
 	slotNum, bidderAddr, err := parseBidFilters(c)
 	if err != nil {
 		retBadReq(err, c)
@@ -26,7 +26,7 @@ func getBids(c *gin.Context) {
 		return
 	}
 
-	bids, pagination, err := h.GetBidsAPI(
+	bids, pagination, err := a.h.GetBidsAPI(
 		slotNum, bidderAddr, fromItem, limit, order,
 	)
 

api/config.go

@@ -32,6 +32,6 @@ type configAPI struct {
 	WDelayerConstants common.WDelayerConstants `json:"withdrawalDelayer"`
 }
 
-func getConfig(c *gin.Context) {
-	c.JSON(http.StatusOK, cg)
+func (a *API) getConfig(c *gin.Context) {
+	c.JSON(http.StatusOK, a.cg)
 }

api/config_test.go

@@ -62,5 +62,5 @@ func TestGetConfig(t *testing.T) {
 	var configTest configAPI
 	assert.NoError(t, doGoodReq("GET", endpoint, nil, &configTest))
 	assert.Equal(t, config, configTest)
-	assert.Equal(t, cg, &configTest)
+	assert.Equal(t, api.cg, &configTest)
 }

api/coordinator.go

@@ -8,7 +8,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 )
 
-func getCoordinator(c *gin.Context) {
+func (a *API) getCoordinator(c *gin.Context) {
 	// Get bidderAddr
 	const name = "bidderAddr"
 	bidderAddr, err := parseParamEthAddr(name, c)
@@ -21,7 +21,7 @@ func getCoordinator(c *gin.Context) {
 		return
 	}
 
-	coordinator, err := h.GetCoordinatorAPI(*bidderAddr)
+	coordinator, err := a.h.GetCoordinatorAPI(*bidderAddr)
 	if err != nil {
 		retSQLErr(err, c)
 		return
@@ -30,7 +30,7 @@ func getCoordinator(c *gin.Context) {
 	c.JSON(http.StatusOK, coordinator)
 }
 
-func getCoordinators(c *gin.Context) {
+func (a *API) getCoordinators(c *gin.Context) {
 	// Pagination
 	fromItem, order, limit, err := parsePagination(c)
 	if err != nil {
@@ -39,7 +39,7 @@ func getCoordinators(c *gin.Context) {
 	}
 
 	// Fetch coordinators from historyDB
-	coordinators, pagination, err := h.GetCoordinatorsAPI(fromItem, limit, order)
+	coordinators, pagination, err := a.h.GetCoordinatorsAPI(fromItem, limit, order)
 	if err != nil {
 		retSQLErr(err, c)
 		return

api/exits.go

@@ -8,7 +8,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 )
 
-func getExits(c *gin.Context) {
+func (a *API) getExits(c *gin.Context) {
 	// Get query parameters
 	// Account filters
 	tokenID, addr, bjj, idx, err := parseExitFilters(c)
@@ -36,7 +36,7 @@ func getExits(c *gin.Context) {
 	}
 
 	// Fetch exits from historyDB
-	exits, pagination, err := h.GetExitsAPI(
+	exits, pagination, err := a.h.GetExitsAPI(
 		addr, bjj, tokenID, idx, batchNum, onlyPendingWithdraws, fromItem, limit, order,
 	)
 	if err != nil {
@@ -55,7 +55,7 @@ func getExits(c *gin.Context) {
 	})
 }
 
-func getExit(c *gin.Context) {
+func (a *API) getExit(c *gin.Context) {
 	// Get batchNum and accountIndex
 	batchNum, err := parseParamUint("batchNum", nil, 0, maxUint32, c)
 	if err != nil {
@@ -68,7 +68,7 @@ func getExit(c *gin.Context) {
 		return
 	}
 	// Fetch tx from historyDB
-	exit, err := h.GetExitAPI(batchNum, idx)
+	exit, err := a.h.GetExitAPI(batchNum, idx)
 	if err != nil {
 		retSQLErr(err, c)
 		return

api/handlers.go

@@ -31,18 +31,6 @@ var (
 	ErrNillBidderAddr = errors.New("biderAddr can not be nil")
 )
 
-func getNextForgers(c *gin.Context) {
-
-}
-
-func getState(c *gin.Context) {
-
-}
-
-func getRecommendedFee(c *gin.Context) {
-
-}
-
 func retSQLErr(err error, c *gin.Context) {
 	if err == sql.ErrNoRows {
 		c.JSON(http.StatusNotFound, errorMsg{

api/slots.go

@@ -24,23 +24,23 @@ type SlotAPI struct {
 	LastItem    uint64            `json:"-"`
 }
 
-func getFirstLastBlock(slotNum int64) (int64, int64) {
-	genesisBlock := cg.AuctionConstants.GenesisBlockNum
-	blocksPerSlot := int64(cg.AuctionConstants.BlocksPerSlot)
+func (a *API) getFirstLastBlock(slotNum int64) (int64, int64) {
+	genesisBlock := a.cg.AuctionConstants.GenesisBlockNum
+	blocksPerSlot := int64(a.cg.AuctionConstants.BlocksPerSlot)
 	firstBlock := slotNum*blocksPerSlot + genesisBlock
 	lastBlock := (slotNum+1)*blocksPerSlot + genesisBlock - 1
 	return firstBlock, lastBlock
 }
 
-func getCurrentSlot(currentBlock int64) int64 {
-	genesisBlock := cg.AuctionConstants.GenesisBlockNum
-	blocksPerSlot := int64(cg.AuctionConstants.BlocksPerSlot)
+func (a *API) getCurrentSlot(currentBlock int64) int64 {
+	genesisBlock := a.cg.AuctionConstants.GenesisBlockNum
+	blocksPerSlot := int64(a.cg.AuctionConstants.BlocksPerSlot)
 	currentSlot := (currentBlock - genesisBlock) / blocksPerSlot
 	return currentSlot
 }
 
-func isOpenAuction(currentBlock, slotNum int64, auctionVars common.AuctionVariables) bool {
-	currentSlot := getCurrentSlot(currentBlock)
+func (a *API) isOpenAuction(currentBlock, slotNum int64, auctionVars common.AuctionVariables) bool {
+	currentSlot := a.getCurrentSlot(currentBlock)
 	closedAuctionSlots := currentSlot + int64(auctionVars.ClosedAuctionSlots)
 	openAuctionSlots := int64(auctionVars.OpenAuctionSlots)
 	if slotNum > closedAuctionSlots && slotNum <= (closedAuctionSlots+openAuctionSlots) {
@@ -61,9 +61,9 @@ func getPagination(totalItems uint64, minSlotNum, maxSlotNum *int64) *db.Paginat
 	return pagination
 }
 
-func newSlotAPI(slotNum, currentBlockNum int64, bid *historydb.BidAPI, auctionVars *common.AuctionVariables) SlotAPI {
-	firstBlock, lastBlock := getFirstLastBlock(slotNum)
-	openAuction := isOpenAuction(currentBlockNum, slotNum, *auctionVars)
+func (a *API) newSlotAPI(slotNum, currentBlockNum int64, bid *historydb.BidAPI, auctionVars *common.AuctionVariables) SlotAPI {
+	firstBlock, lastBlock := a.getFirstLastBlock(slotNum)
+	openAuction := a.isOpenAuction(currentBlockNum, slotNum, *auctionVars)
 	slot := SlotAPI{
 		ItemID:      uint64(slotNum),
 		SlotNum:     slotNum,
@@ -75,10 +75,10 @@ func newSlotAPI(slotNum, currentBlockNum int64, bid *historydb.BidAPI, auctionVa
 	return slot
 }
 
-func newSlotsAPIFromWinnerBids(fromItem *uint, order string, bids []historydb.BidAPI, currentBlockNum int64, auctionVars *common.AuctionVariables) (slots []SlotAPI) {
+func (a *API) newSlotsAPIFromWinnerBids(fromItem *uint, order string, bids []historydb.BidAPI, currentBlockNum int64, auctionVars *common.AuctionVariables) (slots []SlotAPI) {
 	for i := range bids {
 		slotNum := bids[i].SlotNum
-		slot := newSlotAPI(slotNum, currentBlockNum, &bids[i], auctionVars)
+		slot := a.newSlotAPI(slotNum, currentBlockNum, &bids[i], auctionVars)
 		if order == historydb.OrderAsc {
 			if slot.ItemID >= uint64(*fromItem) {
 				slots = append(slots, slot)
@@ -92,8 +92,8 @@ func newSlotsAPIFromWinnerBids(fromItem *uint, order string, bids []historydb.Bi
 	return slots
 }
 
-func addEmptySlot(slots []SlotAPI, slotNum int64, currentBlockNum int64, auctionVars *common.AuctionVariables, fromItem *uint, order string) ([]SlotAPI, error) {
-	emptySlot := newSlotAPI(slotNum, currentBlockNum, nil, auctionVars)
+func (a *API) addEmptySlot(slots []SlotAPI, slotNum int64, currentBlockNum int64, auctionVars *common.AuctionVariables, fromItem *uint, order string) ([]SlotAPI, error) {
+	emptySlot := a.newSlotAPI(slotNum, currentBlockNum, nil, auctionVars)
 	if order == historydb.OrderAsc {
 		if emptySlot.ItemID >= uint64(*fromItem) {
 			slots = append(slots, emptySlot)
@@ -106,25 +106,25 @@ func addEmptySlot(slots []SlotAPI, slotNum int64, currentBlockNum int64, auction
 	return slots, nil
 }
 
-func getSlot(c *gin.Context) {
+func (a *API) getSlot(c *gin.Context) {
 	slotNumUint, err := parseParamUint("slotNum", nil, 0, maxUint32, c)
 	if err != nil {
 		retBadReq(err, c)
 		return
 	}
-	currentBlock, err := h.GetLastBlock()
+	currentBlock, err := a.h.GetLastBlock()
 	if err != nil {
 		retBadReq(err, c)
 		return
 	}
-	auctionVars, err := h.GetAuctionVars()
+	auctionVars, err := a.h.GetAuctionVars()
 	if err != nil {
 		retBadReq(err, c)
 		return
 	}
 
 	slotNum := int64(*slotNumUint)
-	bid, err := h.GetBestBidAPI(&slotNum)
+	bid, err := a.h.GetBestBidAPI(&slotNum)
 	if err != nil && err != sql.ErrNoRows {
 		retSQLErr(err, c)
 		return
@@ -132,9 +132,9 @@ func getSlot(c *gin.Context) {
 
 	var slot SlotAPI
 	if err == sql.ErrNoRows {
-		slot = newSlotAPI(slotNum, currentBlock.EthBlockNum, nil, auctionVars)
+		slot = a.newSlotAPI(slotNum, currentBlock.EthBlockNum, nil, auctionVars)
 	} else {
-		slot = newSlotAPI(bid.SlotNum, currentBlock.EthBlockNum, &bid, auctionVars)
+		slot = a.newSlotAPI(bid.SlotNum, currentBlock.EthBlockNum, &bid, auctionVars)
 	}
 
 	// JSON response
@@ -193,7 +193,7 @@ func getLimitsWithAddr(minSlotNum, maxSlotNum *int64, fromItem, limit *uint, ord
 	return minLim, maxLim
 }
 
-func getSlots(c *gin.Context) {
+func (a *API) getSlots(c *gin.Context) {
 	var slots []SlotAPI
 	minSlotNumDflt := int64(0)
 
@@ -211,12 +211,12 @@ func getSlots(c *gin.Context) {
 		return
 	}
 
-	currentBlock, err := h.GetLastBlock()
+	currentBlock, err := a.h.GetLastBlock()
 	if err != nil {
 		retBadReq(err, c)
 		return
 	}
-	auctionVars, err := h.GetAuctionVars()
+	auctionVars, err := a.h.GetAuctionVars()
 	if err != nil {
 		retBadReq(err, c)
 		return
@@ -231,13 +231,13 @@ func getSlots(c *gin.Context) {
 			retBadReq(errors.New("It is necessary to add maxSlotNum filter"), c)
 			return
 		} else if *finishedAuction {
-			currentBlock, err := h.GetLastBlock()
+			currentBlock, err := a.h.GetLastBlock()
 			if err != nil {
 				retBadReq(err, c)
 				return
 			}
-			currentSlot := getCurrentSlot(currentBlock.EthBlockNum)
-			auctionVars, err := h.GetAuctionVars()
+			currentSlot := a.getCurrentSlot(currentBlock.EthBlockNum)
+			auctionVars, err := a.h.GetAuctionVars()
 			if err != nil {
 				retBadReq(err, c)
 				return
@@ -267,7 +267,7 @@ func getSlots(c *gin.Context) {
 	if wonByEthereumAddress == nil {
 		slotMinLim, slotMaxLim = getLimits(minSlotNum, maxSlotNum, fromItem, limit, order)
 		// Get best bids in range maxSlotNum - minSlotNum
-		bids, _, err = h.GetBestBidsAPI(&slotMinLim, &slotMaxLim, wonByEthereumAddress, nil, order)
+		bids, _, err = a.h.GetBestBidsAPI(&slotMinLim, &slotMaxLim, wonByEthereumAddress, nil, order)
 		if err != nil && err != sql.ErrNoRows {
 			retSQLErr(err, c)
 			return
@@ -275,7 +275,7 @@ func getSlots(c *gin.Context) {
 		totalItems = uint64(*maxSlotNum) - uint64(*minSlotNum) + 1
 	} else {
 		slotMinLim, slotMaxLim = getLimitsWithAddr(minSlotNum, maxSlotNum, fromItem, limit, order)
-		bids, pag, err = h.GetBestBidsAPI(&slotMinLim, &slotMaxLim, wonByEthereumAddress, limit, order)
+		bids, pag, err = a.h.GetBestBidsAPI(&slotMinLim, &slotMaxLim, wonByEthereumAddress, limit, order)
 		if err != nil && err != sql.ErrNoRows {
 			retSQLErr(err, c)
 			return
@@ -290,7 +290,7 @@ func getSlots(c *gin.Context) {
 	// Build the slot information with previous bids
 	var slotsBids []SlotAPI
 	if len(bids) > 0 {
-		slotsBids = newSlotsAPIFromWinnerBids(fromItem, order, bids, currentBlock.EthBlockNum, auctionVars)
+		slotsBids = a.newSlotsAPIFromWinnerBids(fromItem, order, bids, currentBlock.EthBlockNum, auctionVars)
 		if err != nil {
 			retBadReq(err, c)
 			return
@@ -318,7 +318,7 @@ func getSlots(c *gin.Context) {
 				}
 			}
 			if !found {
-				slots, err = addEmptySlot(slots, i, currentBlock.EthBlockNum, auctionVars, fromItem, order)
+				slots, err = a.addEmptySlot(slots, i, currentBlock.EthBlockNum, auctionVars, fromItem, order)
 				if err != nil {
 					retBadReq(err, c)
 					return

api/slots_test.go

@@ -41,7 +41,7 @@ func (t testSlotsResponse) Len() int {
 	return len(t.Slots)
 }
 
-func genTestSlots(nSlots int, lastBlockNum int64, bids []testBid, auctionVars common.AuctionVariables) []testSlot {
+func (a *API) genTestSlots(nSlots int, lastBlockNum int64, bids []testBid, auctionVars common.AuctionVariables) []testSlot {
 	tSlots := []testSlot{}
 	bestBids := make(map[int64]testBid)
 	// It's assumed that bids for each slot will be received in increasing order
@@ -51,12 +51,12 @@ func genTestSlots(nSlots int, lastBlockNum int64, bids []testBid, auctionVars co
 
 	for i := int64(0); i < int64(nSlots); i++ {
 		bid, ok := bestBids[i]
-		firstBlock, lastBlock := getFirstLastBlock(int64(i))
+		firstBlock, lastBlock := a.getFirstLastBlock(int64(i))
 		tSlot := testSlot{
 			SlotNum:     int64(i),
 			FirstBlock:  firstBlock,
 			LastBlock:   lastBlock,
-			OpenAuction: isOpenAuction(lastBlockNum, int64(i), auctionVars),
+			OpenAuction: a.isOpenAuction(lastBlockNum, int64(i), auctionVars),
 		}
 		if ok {
 			tSlot.WinnerBid = &bid
@@ -66,8 +66,8 @@ func genTestSlots(nSlots int, lastBlockNum int64, bids []testBid, auctionVars co
 	return tSlots
 }
 
-func getEmptyTestSlot(slotNum int64) testSlot {
-	firstBlock, lastBlock := getFirstLastBlock(slotNum)
+func (a *API) getEmptyTestSlot(slotNum int64) testSlot {
+	firstBlock, lastBlock := a.getFirstLastBlock(slotNum)
 	slot := testSlot{
 		SlotNum:     slotNum,
 		FirstBlock:  firstBlock,
@@ -102,7 +102,7 @@ func TestGetSlot(t *testing.T) {
 			nil, &fetchedSlot,
 		),
 	)
-	emptySlot := getEmptyTestSlot(slotNum)
+	emptySlot := api.getEmptyTestSlot(slotNum)
 	assertSlot(t, emptySlot, fetchedSlot)
 
 	// Invalid slotNum
@@ -131,7 +131,7 @@ func TestGetSlots(t *testing.T) {
 	assert.NoError(t, err)
 	allSlots := tc.slots
 	for i := tc.slots[len(tc.slots)-1].SlotNum; i < maxSlotNum; i++ {
-		emptySlot := getEmptyTestSlot(i + 1)
+		emptySlot := api.getEmptyTestSlot(i + 1)
 		allSlots = append(allSlots, emptySlot)
 	}
 	assertSlots(t, allSlots, fetchedSlots)
@@ -185,7 +185,7 @@ func TestGetSlots(t *testing.T) {
 	err = doGoodReqPaginated(path, historydb.OrderAsc, &testSlotsResponse{}, appendIter)
 	assert.NoError(t, err)
 
-	currentSlot := getCurrentSlot(tc.blocks[len(tc.blocks)-1].EthBlockNum)
+	currentSlot := api.getCurrentSlot(tc.blocks[len(tc.blocks)-1].EthBlockNum)
 	finishedAuctionSlots := []testSlot{}
 	for i := 0; i < len(tc.slots); i++ {
 		finishAuction := currentSlot + int64(tc.auctionVars.ClosedAuctionSlots)

api/state.go

@@ -1,16 +1,11 @@
 package api
 
 import (
-	"github.com/hermeznetwork/hermez-node/common"
-	"github.com/hermeznetwork/hermez-node/db/historydb"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
 )
 
-// Status define status of the network
-type Status struct {
-	Network           historydb.Network        `json:"network"`
-	Metrics           historydb.Metrics        `json:"metrics"`
-	Rollup            common.RollupVariables   `json:"rollup"`
-	Auction           common.AuctionVariables  `json:"auction"`
-	WithdrawalDelayer common.WDelayerVariables `json:"withdrawalDelayer"`
-	RecommendedFee    common.RecommendedFee    `json:"recommendedFee"`
+func (a *API) getState(c *gin.Context) {
+	c.JSON(http.StatusOK, a.status)
 }

api/token.go

@@ -10,7 +10,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 )
 
-func getToken(c *gin.Context) {
+func (a *API) getToken(c *gin.Context) {
 	// Get TokenID
 	tokenIDUint, err := parseParamUint("id", nil, 0, maxUint32, c)
 	if err != nil {
@@ -23,7 +23,7 @@ func getToken(c *gin.Context) {
 	}
 	tokenID := common.TokenID(*tokenIDUint)
 	// Fetch token from historyDB
-	token, err := h.GetToken(tokenID)
+	token, err := a.h.GetToken(tokenID)
 	if err != nil {
 		retSQLErr(err, c)
 		return
@@ -31,7 +31,7 @@ func getToken(c *gin.Context) {
 	c.JSON(http.StatusOK, token)
 }
 
-func getTokens(c *gin.Context) {
+func (a *API) getTokens(c *gin.Context) {
 	// Account filters
 	tokenIDs, symbols, name, err := parseTokenFilters(c)
 	if err != nil {
@@ -46,7 +46,7 @@ func getTokens(c *gin.Context) {
 		return
 	}
 	// Fetch exits from historyDB
-	tokens, pagination, err := h.GetTokens(
+	tokens, pagination, err := a.h.GetTokens(
 		tokenIDs, symbols, name, fromItem, limit, order,
 	)
 	if err != nil {

api/txshistory.go

@@ -8,7 +8,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 )
 
-func getHistoryTxs(c *gin.Context) {
+func (a *API) getHistoryTxs(c *gin.Context) {
 	// Get query parameters
 	tokenID, addr, bjj, idx, err := parseExitFilters(c)
 	if err != nil {
@@ -35,7 +35,7 @@ func getHistoryTxs(c *gin.Context) {
 	}
 
 	// Fetch txs from historyDB
-	txs, pagination, err := h.GetHistoryTxs(
+	txs, pagination, err := a.h.GetHistoryTxs(
 		addr, bjj, tokenID, idx, batchNum, txType, fromItem, limit, order,
 	)
 	if err != nil {
@@ -54,7 +54,7 @@ func getHistoryTxs(c *gin.Context) {
 	})
 }
 
-func getHistoryTx(c *gin.Context) {
+func (a *API) getHistoryTx(c *gin.Context) {
 	// Get TxID
 	txID, err := parseParamTxID(c)
 	if err != nil {
@@ -62,7 +62,7 @@ func getHistoryTx(c *gin.Context) {
 		return
 	}
 	// Fetch tx from historyDB
-	tx, err := h.GetHistoryTx(txID)
+	tx, err := a.h.GetHistoryTx(txID)
 	if err != nil {
 		retSQLErr(err, c)
 		return

api/txspool.go

@@ -13,7 +13,7 @@ import (
 	"github.com/iden3/go-iden3-crypto/babyjub"
 )
 
-func postPoolTx(c *gin.Context) {
+func (a *API) postPoolTx(c *gin.Context) {
 	// Parse body
 	var receivedTx receivedPoolTx
 	if err := c.ShouldBindJSON(&receivedTx); err != nil {
@@ -22,12 +22,12 @@ func postPoolTx(c *gin.Context) {
 	}
 	// Transform from received to insert format and validate
 	writeTx := receivedTx.toPoolL2TxWrite()
-	if err := verifyPoolL2TxWrite(writeTx); err != nil {
+	if err := a.verifyPoolL2TxWrite(writeTx); err != nil {
 		retBadReq(err, c)
 		return
 	}
 	// Insert to DB
-	if err := l2.AddTx(writeTx); err != nil {
+	if err := a.l2.AddTx(writeTx); err != nil {
 		retSQLErr(err, c)
 		return
 	}
@@ -35,7 +35,7 @@ func postPoolTx(c *gin.Context) {
 	c.JSON(http.StatusOK, writeTx.TxID.String())
 }
 
-func getPoolTx(c *gin.Context) {
+func (a *API) getPoolTx(c *gin.Context) {
 	// Get TxID
 	txID, err := parseParamTxID(c)
 	if err != nil {
@@ -43,7 +43,7 @@ func getPoolTx(c *gin.Context) {
 		return
 	}
 	// Fetch tx from l2DB
-	tx, err := l2.GetTxAPI(txID)
+	tx, err := a.l2.GetTxAPI(txID)
 	if err != nil {
 		retSQLErr(err, c)
 		return
@@ -102,7 +102,7 @@ func (tx *receivedPoolTx) toPoolL2TxWrite() *l2db.PoolL2TxWrite {
 	}
 }
 
-func verifyPoolL2TxWrite(txw *l2db.PoolL2TxWrite) error {
+func (a *API) verifyPoolL2TxWrite(txw *l2db.PoolL2TxWrite) error {
 	poolTx := common.PoolL2Tx{
 		TxID:    txw.TxID,
 		FromIdx: txw.FromIdx,
@@ -159,7 +159,7 @@ func verifyPoolL2TxWrite(txw *l2db.PoolL2TxWrite) error {
 		return err
 	}
 	// Get public key
-	account, err := s.GetAccount(poolTx.FromIdx)
+	account, err := a.s.GetAccount(poolTx.FromIdx)
 	if err != nil {
 		return err
 	}

common/fee_test.go

@@ -9,15 +9,15 @@ import (
 )
 
 func TestFeePercentage(t *testing.T) {
-	assert.InEpsilon(t, 2.68E-18, FeeSelector(1).Percentage(), 0.002)
-	assert.InEpsilon(t, 6.76E-14, FeeSelector(10).Percentage(), 0.002)
-	assert.InEpsilon(t, 3.91E-03, FeeSelector(32).Percentage(), 0.002)
-	assert.InEpsilon(t, 7.29E-03, FeeSelector(50).Percentage(), 0.002)
-	assert.InEpsilon(t, 4.12E-02, FeeSelector(100).Percentage(), 0.002)
-	assert.InEpsilon(t, 2.33E-01, FeeSelector(150).Percentage(), 0.002)
-	assert.InEpsilon(t, 1.00E+00, FeeSelector(192).Percentage(), 0.002)
-	assert.InEpsilon(t, 2.56E+02, FeeSelector(200).Percentage(), 0.002)
-	assert.InEpsilon(t, 2.88E+17, FeeSelector(250).Percentage(), 0.002)
+	assert.InEpsilon(t, 2.68e-18, FeeSelector(1).Percentage(), 0.002)
+	assert.InEpsilon(t, 6.76e-14, FeeSelector(10).Percentage(), 0.002)
+	assert.InEpsilon(t, 3.91e-03, FeeSelector(32).Percentage(), 0.002)
+	assert.InEpsilon(t, 7.29e-03, FeeSelector(50).Percentage(), 0.002)
+	assert.InEpsilon(t, 4.12e-02, FeeSelector(100).Percentage(), 0.002)
+	assert.InEpsilon(t, 2.33e-01, FeeSelector(150).Percentage(), 0.002)
+	assert.InEpsilon(t, 1.00e+00, FeeSelector(192).Percentage(), 0.002)
+	assert.InEpsilon(t, 2.56e+02, FeeSelector(200).Percentage(), 0.002)
+	assert.InEpsilon(t, 2.88e+17, FeeSelector(250).Percentage(), 0.002)
 }
 
 func TestCalcFeeAmount(t *testing.T) {