Merge pull request #223 from hermeznetwork/feature/eth-remove-ERC777

Feature/eth remove erc777
2026-02-07 03:16:45 +01:00 · 2020-10-26 16:20:41 +01:00
parent d17cc57e1d 79b105b497
commit 2aa5598975
29 changed files with 1744 additions and 2425 deletions
--- a/cli/node/cfg.example.toml
+++ b/cli/node/cfg.example.toml
@@ -23,6 +23,7 @@ SyncLoopInterval = "1s"
 Rollup   = "0xEcc0a6dbC0bb4D51E4F84A315a9e5B0438cAD4f0"
 Auction  = "0x500D1d6A4c7D8Ae28240b47c8FCde034D827fD5e"
 TokenHEZ = "0xf784709d2317D872237C4bC22f867d1BAe2913AB"
+TokenHEZName = "Hermez Network Token"

 [EthClient]
 CallGasLimit        = 300000
--- a/config/config.go
+++ b/config/config.go
@@ -68,9 +68,10 @@ type Node struct {
 		SyncLoopInterval Duration `validate:"required"`
 	} `validate:"required"`
 	SmartContracts struct {
-		Rollup   ethCommon.Address `validate:"required"`
-		Auction  ethCommon.Address `validate:"required"`
-		TokenHEZ ethCommon.Address `validate:"required"`
+		Rollup       ethCommon.Address `validate:"required"`
+		Auction      ethCommon.Address `validate:"required"`
+		TokenHEZ     ethCommon.Address `validate:"required"`
+		TokenHEZName string            `validate:"required"`
 	} `validate:"required"`
 	EthClient struct {
 		CallGasLimit        uint64   `validate:"required"`
--- a/coordinator/coordinator_test.go
+++ b/coordinator/coordinator_test.go
@@ -178,9 +178,9 @@ func TestCoordinator(t *testing.T) {
 	// Bid for slot 2 and 4
 	_, err := ethClient.AuctionSetCoordinator(forger, "https://foo.bar")
 	require.Nil(t, err)
-	_, err = ethClient.AuctionBid(2, big.NewInt(9999))
+	_, err = ethClient.AuctionBidSimple(2, big.NewInt(9999))
 	require.Nil(t, err)
-	_, err = ethClient.AuctionBid(4, big.NewInt(9999))
+	_, err = ethClient.AuctionBidSimple(4, big.NewInt(9999))
 	require.Nil(t, err)

 	c := NewCoordinator(conf, hdb, txsel, bb, serverProofs, ethClient)
--- a/eth/.env.example
+++ b/eth/.env.example
@@ -0,0 +1,7 @@
+GENESIS_BLOCK=97
+AUCTION="0x038B86d9d8FAFdd0a02ebd1A476432877b0107C8"
+AUCTION_TEST="0xEcc0a6dbC0bb4D51E4F84A315a9e5B0438cAD4f0"
+TOKENHEZ="0xf4e77E5Da47AC3125140c470c71cBca77B5c638c"
+HERMEZ="0xD6C850aeBFDC46D7F4c207e445cC0d6B0919BDBe"
+WDELAYER="0x500D1d6A4c7D8Ae28240b47c8FCde034D827fD5e"
+WDELAYER_TEST="0x1d80315fac6aBd3EfeEbE97dEc44461ba7556160"
--- a/eth/README.md
+++ b/eth/README.md
@@ -0,0 +1,62 @@
+ Test Ethclient - Contracts
+
+## Contracts
+
+The first step is to clone the github repository where the contracts are located:
+
+`git clone https://github.com/hermeznetwork/contracts.git`
+
+While the prepared deployment is not found to master, branch in repository must be changed:
+
+`git checkout feature/ethclient-test-deployment`
+
+Now, install the dependencies:
+
+```
+cd contracts/
+yarn install
+```
+
+Go to where the deployment scripts for the test are found:
+
+`cd scripts/ethclient-deployment/`
+
+Now, a bash script (which uses gnome-terminal) has to be run to do the deployment:
+`./test-deploy.sh`
+
+This bash file follows these steps:
+- `npx builder node`: a local blockchain to do our tests
+- `npx buidler run --network localhost test-deployment.js`: run the deployment on the local blockchain
+
+Alternatively you can run the two previous commands manually in different terminals.
+
+An output file necessary for the next step is obtained: `deploy-output`.
+
+> The files that appear in `hermez-node/eth/contracts` must be generated from the same contract that we deploy in this step
+
+## Ethclient Test
+
+Different environment variables are necessary to run this test.
+They must be taken from the output file of the previous step.
+
+They can be provided by file called `.env`:
+
+```
+GENESIS_BLOCK=97
+AUCTION="0x038B86d9d8FAFdd0a02ebd1A476432877b0107C8"
+AUCTION_TEST="0xEcc0a6dbC0bb4D51E4F84A315a9e5B0438cAD4f0"
+TOKENHEZ="0xf4e77E5Da47AC3125140c470c71cBca77B5c638c"
+HERMEZ="0xD6C850aeBFDC46D7F4c207e445cC0d6B0919BDBe"
+WDELAYER="0x500D1d6A4c7D8Ae28240b47c8FCde034D827fD5e"
+WDELAYER_TEST="0x1d80315fac6aBd3EfeEbE97dEc44461ba7556160"
+```
+
+> An example is found in `hermez-node/eth/.env.example`
+
+And then run test from `hermez-node/eth/`:
+
+`INTEGRATION=1 go test`
+
+Or they can be provided as a parameter in the command that runs the test:
+
+`INTEGRATION=1 GENESIS_BLOCK=97 AUCTION="0x038B86d9d8FAFdd0a02ebd1A476432877b0107C8" AUCTION_TEST="0xEcc0a6dbC0bb4D51E4F84A315a9e5B0438cAD4f0" TOKENHEZ="0xf4e77E5Da47AC3125140c470c71cBca77B5c638c" HERMEZ="0xD6C850aeBFDC46D7F4c207e445cC0d6B0919BDBe" WDELAYER="0x500D1d6A4c7D8Ae28240b47c8FCde034D827fD5e" WDELAYER_TEST="0x1d80315fac6aBd3EfeEbE97dEc44461ba7556160" go test`
--- a/eth/auction.go
+++ b/eth/auction.go
@@ -2,7 +2,6 @@ package eth

 import (
 	"context"
-	"encoding/binary"
 	"fmt"
 	"math/big"
 	"strings"
@@ -15,8 +14,7 @@ import (
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethclient"
 	HermezAuctionProtocol "github.com/hermeznetwork/hermez-node/eth/contracts/auction"
-	ERC777 "github.com/hermeznetwork/hermez-node/eth/contracts/erc777"
-	"golang.org/x/crypto/sha3"
+	HEZ "github.com/hermeznetwork/hermez-node/eth/contracts/tokenHEZ"
 )

 // AuctionConstants are the constants of the Rollup Smart Contract
@@ -237,8 +235,9 @@ type AuctionInterface interface {
 	AuctionGetSlotSet(slot int64) (*big.Int, error)

 	// Bidding
-	AuctionBid(slot int64, bidAmount *big.Int) (*types.Transaction, error)
-	AuctionMultiBid(startingSlot int64, endingSlot int64, slotSet [6]bool, maxBid, closedMinBid, budget *big.Int) (*types.Transaction, error)
+	AuctionBid(amount *big.Int, slot int64, bidAmount *big.Int, deadline *big.Int) (tx *types.Transaction, err error)
+	AuctionMultiBid(amount *big.Int, startingSlot, endingSlot int64, slotSets [6]bool,
+		maxBid, minBid, deadline *big.Int) (tx *types.Transaction, err error)

 	// Forge
 	AuctionCanForge(forger ethCommon.Address, blockNum int64) (bool, error)
@@ -262,15 +261,16 @@ type AuctionInterface interface {

 // AuctionClient is the implementation of the interface to the Auction Smart Contract in ethereum.
 type AuctionClient struct {
-	client       *EthereumClient
-	address      ethCommon.Address
-	tokenAddress ethCommon.Address
-	auction      *HermezAuctionProtocol.HermezAuctionProtocol
-	contractAbi  abi.ABI
+	client      *EthereumClient
+	address     ethCommon.Address
+	tokenHEZCfg TokenConfig
+	auction     *HermezAuctionProtocol.HermezAuctionProtocol
+	tokenHEZ    *HEZ.HEZ
+	contractAbi abi.ABI
 }

 // NewAuctionClient creates a new AuctionClient.  `tokenAddress` is the address of the HEZ tokens.
-func NewAuctionClient(client *EthereumClient, address, tokenAddress ethCommon.Address) (*AuctionClient, error) {
+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
@@ -279,12 +279,17 @@ func NewAuctionClient(client *EthereumClient, address, tokenAddress ethCommon.Ad
 	if err != nil {
 		return nil, err
 	}
+	tokenHEZ, err := HEZ.NewHEZ(tokenHEZCfg.Address, client.Client())
+	if err != nil {
+		return nil, err
+	}
 	return &AuctionClient{
-		client:       client,
-		address:      address,
-		tokenAddress: tokenAddress,
-		auction:      auction,
-		contractAbi:  contractAbi,
+		client:      client,
+		address:     address,
+		tokenHEZCfg: tokenHEZCfg,
+		auction:     auction,
+		tokenHEZ:    tokenHEZ,
+		contractAbi: contractAbi,
 	}, nil
 }

@@ -558,30 +563,24 @@ func (c *AuctionClient) AuctionGetSlotNumber(blockNum int64) (slot int64, err er
 }

 // AuctionBid is the interface to call the smart contract function
-func (c *AuctionClient) AuctionBid(slot int64, bidAmount *big.Int) (tx *types.Transaction, err error) {
+func (c *AuctionClient) AuctionBid(amount *big.Int, slot int64, bidAmount *big.Int, deadline *big.Int) (tx *types.Transaction, err error) {
 	if tx, err = c.client.CallAuth(
 		0,
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
-			tokens, err := ERC777.NewERC777(c.tokenAddress, ec)
+			owner := c.client.account.Address
+			spender := c.address
+			nonce, err := c.tokenHEZ.Nonces(nil, owner)
 			if err != nil {
 				return nil, err
 			}
-			bidFnSignature := []byte("bid(uint128,uint128)")
-			hash := sha3.NewLegacyKeccak256()
-			_, err = hash.Write(bidFnSignature)
-			if err != nil {
-				return nil, err
-			}
-			methodID := hash.Sum(nil)[:4]
-			slotBytes := make([]byte, 8)
-			binary.BigEndian.PutUint64(slotBytes, uint64(slot))
-			paddedSlot := ethCommon.LeftPadBytes(slotBytes, 32)
-			paddedAmount := ethCommon.LeftPadBytes(bidAmount.Bytes(), 32)
-			var userData []byte
-			userData = append(userData, methodID...)
-			userData = append(userData, paddedSlot...)
-			userData = append(userData, paddedAmount...)
-			return tokens.Send(auth, c.address, bidAmount, userData)
+			tokenName := c.tokenHEZCfg.Name
+			tokenAddr := c.tokenHEZCfg.Address
+			chainid, _ := c.client.Client().ChainID(context.Background())
+			digest, _ := createPermitDigest(tokenAddr, owner, spender, chainid, amount, nonce, deadline, tokenName)
+			signature, _ := c.client.ks.SignHash(*c.client.account, digest)
+			permit := createPermit(owner, spender, amount, deadline, digest, signature)
+			_slot := big.NewInt(slot)
+			return c.auction.ProcessBid(auth, amount, _slot, bidAmount, permit)
 		},
 	); err != nil {
 		return nil, fmt.Errorf("Failed bid: %w", err)
@@ -590,46 +589,27 @@ func (c *AuctionClient) AuctionBid(slot int64, bidAmount *big.Int) (tx *types.Tr
 }

 // AuctionMultiBid is the interface to call the smart contract function
-func (c *AuctionClient) AuctionMultiBid(startingSlot int64, endingSlot int64, slotSet [6]bool,
-	maxBid, closedMinBid, budget *big.Int) (tx *types.Transaction, err error) {
+func (c *AuctionClient) AuctionMultiBid(amount *big.Int, startingSlot, endingSlot int64, slotSets [6]bool,
+	maxBid, minBid, deadline *big.Int) (tx *types.Transaction, err error) {
 	if tx, err = c.client.CallAuth(
 		1000000, //nolint:gomnd
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
-			tokens, err := ERC777.NewERC777(c.tokenAddress, ec)
+			owner := c.client.account.Address
+			spender := c.address
+			nonce, err := c.tokenHEZ.Nonces(nil, owner)
 			if err != nil {
 				return nil, err
 			}
-			multiBidFnSignature := []byte("multiBid(uint128,uint128,bool[6],uint128,uint128)")
-			hash := sha3.NewLegacyKeccak256()
-			_, err = hash.Write(multiBidFnSignature)
-			if err != nil {
-				return nil, err
-			}
-			methodID := hash.Sum(nil)[:4]
-			startingSlotBytes := make([]byte, 8)
-			binary.BigEndian.PutUint64(startingSlotBytes, uint64(startingSlot))
-			paddedStartingSlot := ethCommon.LeftPadBytes(startingSlotBytes, 32)
-			endingSlotBytes := make([]byte, 8)
-			binary.BigEndian.PutUint64(endingSlotBytes, uint64(endingSlot))
-			paddedEndingSlot := ethCommon.LeftPadBytes(endingSlotBytes, 32)
-			paddedMinBid := ethCommon.LeftPadBytes(closedMinBid.Bytes(), 32)
-			paddedMaxBid := ethCommon.LeftPadBytes(maxBid.Bytes(), 32)
-			var userData []byte
-			userData = append(userData, methodID...)
-			userData = append(userData, paddedStartingSlot...)
-			userData = append(userData, paddedEndingSlot...)
-			for i := 0; i < len(slotSet); i++ {
-				if slotSet[i] {
-					paddedSlotSet := ethCommon.LeftPadBytes([]byte{1}, 32)
-					userData = append(userData, paddedSlotSet...)
-				} else {
-					paddedSlotSet := ethCommon.LeftPadBytes([]byte{0}, 32)
-					userData = append(userData, paddedSlotSet...)
-				}
-			}
-			userData = append(userData, paddedMaxBid...)
-			userData = append(userData, paddedMinBid...)
-			return tokens.Send(auth, c.address, budget, userData)
+			tokenName := c.tokenHEZCfg.Name
+			tokenAddr := c.tokenHEZCfg.Address
+			chainid, _ := c.client.Client().ChainID(context.Background())
+
+			digest, _ := createPermitDigest(tokenAddr, owner, spender, chainid, amount, nonce, deadline, tokenName)
+			signature, _ := c.client.ks.SignHash(*c.client.account, digest)
+			permit := createPermit(owner, spender, amount, deadline, digest, signature)
+			_startingSlot := big.NewInt(startingSlot)
+			_endingSlot := big.NewInt(endingSlot)
+			return c.auction.ProcessMultiBid(auth, amount, _startingSlot, _endingSlot, slotSets, maxBid, minBid, permit)
 		},
 	); err != nil {
 		return nil, fmt.Errorf("Failed multibid: %w", err)
--- a/eth/auction_test.go
+++ b/eth/auction_test.go
@@ -13,20 +13,13 @@ const openAuctionSlotsConst = uint16(4320)
 const closedAuctionSlotsConst = uint16(2)
 const outbiddingConst = uint16(1000)
 const currentSlotConst = 0
+const blocksPerSlot = uint8(40)
+const minBidStr = "10000000000000000000"
+const URL = "http://localhost:3000"

 var allocationRatioConst [3]uint16 = [3]uint16{4000, 4000, 2000}
-
 var auctionClientTest *AuctionClient

-//var genesisBlock = 93
-var genesisBlock = 100
-
-var minBidStr = "10000000000000000000"
-var URL = "http://localhost:3000"
-
-// var newURL = "http://localhost:3002"
-var BLOCKSPERSLOT = uint8(40)
-
 func TestAuctionGetCurrentSlotNumber(t *testing.T) {
 	currentSlot, err := auctionClientTest.AuctionGetCurrentSlotNumber()
 	require.Nil(t, err)
@@ -40,8 +33,8 @@ func TestAuctionConstants(t *testing.T) {

 	auctionConstants, err := auctionClientTest.AuctionConstants()
 	require.Nil(t, err)
-	assert.Equal(t, auctionConstants.BlocksPerSlot, BLOCKSPERSLOT)
-	assert.Equal(t, auctionConstants.GenesisBlockNum, int64(genesisBlock))
+	assert.Equal(t, auctionConstants.BlocksPerSlot, blocksPerSlot)
+	assert.Equal(t, auctionConstants.GenesisBlockNum, genesisBlock)
 	assert.Equal(t, auctionConstants.HermezRollup, hermezRollupAddressTestConst)
 	assert.Equal(t, auctionConstants.InitialMinimalBidding, INITMINBID)
 	assert.Equal(t, auctionConstants.TokenHEZ, tokenHEZAddressConst)
@@ -270,8 +263,10 @@ func TestAuctionBid(t *testing.T) {
 	require.Nil(t, err)
 	bidAmount := new(big.Int)
 	bidAmount.SetString("12000000000000000000", 10)
+	amount := new(big.Int)
+	amount.SetString("12000000000000000000", 10)
 	bidderAddress := governanceAddressConst
-	_, err = auctionClientTest.AuctionBid(currentSlot+4, bidAmount)
+	_, err = auctionClientTest.AuctionBid(amount, currentSlot+4, bidAmount, deadline)
 	require.Nil(t, err)
 	currentBlockNum, _ := auctionClientTest.client.EthCurrentBlock()
 	auctionEvents, _, _ := auctionClientTest.AuctionEventsByBlock(currentBlockNum)
@@ -282,7 +277,7 @@ func TestAuctionBid(t *testing.T) {

 func TestAuctionGetSlotNumber(t *testing.T) {
 	slotConst := 4
-	blockNum := int(BLOCKSPERSLOT)*slotConst + genesisBlock
+	blockNum := int(blocksPerSlot)*slotConst + int(genesisBlock)

 	slot, err := auctionClientTest.AuctionGetSlotNumber(int64(blockNum))
 	require.Nil(t, err)
@@ -291,7 +286,7 @@ func TestAuctionGetSlotNumber(t *testing.T) {

 func TestAuctionCanForge(t *testing.T) {
 	slotConst := 4
-	blockNum := int(BLOCKSPERSLOT)*slotConst + genesisBlock
+	blockNum := int(blocksPerSlot)*slotConst + int(genesisBlock)

 	canForge, err := auctionClientTest.AuctionCanForge(governanceAddressConst, int64(blockNum))
 	require.Nil(t, err)
@@ -309,7 +304,7 @@ func TestAuctionMultiBid(t *testing.T) {
 	budget := new(big.Int)
 	budget.SetString("45200000000000000000", 10)
 	bidderAddress := governanceAddressConst
-	_, err = auctionClientTest.AuctionMultiBid(currentSlot+4, currentSlot+10, slotSet, maxBid, minBid, budget)
+	_, err = auctionClientTest.AuctionMultiBid(budget, currentSlot+4, currentSlot+10, slotSet, maxBid, minBid, deadline)
 	require.Nil(t, err)
 	currentBlockNum, _ := auctionClientTest.client.EthCurrentBlock()
 	auctionEvents, _, _ := auctionClientTest.AuctionEventsByBlock(currentBlockNum)
@@ -346,17 +341,15 @@ func TestAuctionClaimHEZ(t *testing.T) {
 }

 func TestAuctionForge(t *testing.T) {
-	auctionClientTestHermez, err := NewAuctionClient(ethereumClientHermez, auctionTestAddressConst, tokenHEZAddressConst)
+	auctionClientTestHermez, err := NewAuctionClient(ethereumClientHermez, auctionTestAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	slotConst := 4
-	blockNum := int64(int(BLOCKSPERSLOT)*slotConst + genesisBlock)
-	currentBlockNum, _ := auctionClientTest.client.EthCurrentBlock()
+	blockNum := int64(int(blocksPerSlot)*slotConst + int(genesisBlock))
+	currentBlockNum, _ := auctionClientTestHermez.client.EthCurrentBlock()
 	blocksToAdd := blockNum - currentBlockNum
 	addBlocks(blocksToAdd, ethClientDialURL)
-	currentBlockNum, _ = auctionClientTest.client.EthCurrentBlock()
+	currentBlockNum, _ = auctionClientTestHermez.client.EthCurrentBlock()
 	assert.Equal(t, currentBlockNum, blockNum)
-	_, err = auctionClientTestHermez.AuctionForge(bootCoordinatorAddressConst)
-	require.Contains(t, err.Error(), "Can't forge")
 	_, err = auctionClientTestHermez.AuctionForge(governanceAddressConst)
 	require.Nil(t, err)
 }
--- a/eth/client.go
+++ b/eth/client.go
@@ -30,6 +30,12 @@ type Client struct {
 	RollupClient
 }

+// TokenConfig is used to define the information about token
+type TokenConfig struct {
+	Address ethCommon.Address
+	Name    string
+}
+
 // RollupConfig is the configuration for the Rollup smart contract interface
 type RollupConfig struct {
 	Address ethCommon.Address
@@ -37,8 +43,8 @@ type RollupConfig struct {

 // AuctionConfig is the configuration for the Auction smart contract interface
 type AuctionConfig struct {
-	Address         ethCommon.Address
-	TokenHEZAddress ethCommon.Address
+	Address  ethCommon.Address
+	TokenHEZ TokenConfig
 }

 // ClientConfig is the configuration of the Client
@@ -51,11 +57,11 @@ type ClientConfig struct {
 // NewClient creates a new Client to interact with Ethereum and the Hermez smart contracts.
 func NewClient(client *ethclient.Client, account *accounts.Account, ks *ethKeystore.KeyStore, cfg *ClientConfig) (*Client, error) {
 	ethereumClient := NewEthereumClient(client, account, ks, &cfg.Ethereum)
-	auctionClient, err := NewAuctionClient(ethereumClient, cfg.Auction.Address, cfg.Auction.TokenHEZAddress)
+	auctionClient, err := NewAuctionClient(ethereumClient, cfg.Auction.Address, cfg.Auction.TokenHEZ)
 	if err != nil {
 		return nil, err
 	}
-	rollupCient, err := NewRollupClient(ethereumClient, cfg.Rollup.Address, cfg.Auction.TokenHEZAddress)
+	rollupCient, err := NewRollupClient(ethereumClient, cfg.Rollup.Address, cfg.Auction.TokenHEZ)
 	if err != nil {
 		return nil, err
 	}
--- a/eth/contracts/README.md
+++ b/eth/contracts/README.md
@@ -6,20 +6,12 @@ The go code of the contracts has been generated with the following command:
 abigen --abi=WithdrawalDelayer.abi --bin=WithdrawalDelayer.bin --pkg=WithdrawalDelayer --out=WithdrawalDelayer.go
 abigen --abi=Hermez.abi --bin=Hermez.bin --pkg=Hermez --out=Hermez.go
 abigen --abi=HermezAuctionProtocol.abi --bin=HermezAuctionProtocol.bin --pkg=HermezAuctionProtocol --out=HermezAuctionProtocol.go
-abigen --abi=ERC777.abi --bin=ERC777.bin --pkg=ERC777 --out=ERC777.go
+abigen --abi=HEZ.abi --bin=HEZ.bin --pkg=HEZ --out=HEZ.go
 ```
 You must compile the contracts to get the `.bin` and `.abi` files. The contracts used are in the repo: https://github.com/hermeznetwork/contracts

-Specifically they have been processed in the commit with hash: `60e03e981f1ce607c27d405952bfc98de376f0c5`
-
-> abigen version 1.9.21
-
---
-
-ERC20 go code was generated with the following command:
-```
-abigen --sol erc20.sol --pkg erc20 --out erc20/erc20.go
-```
+Branch: `RemoveERC777`
+Specifically they have been processed in the commit with hash: `2a1cfccfba6770c1077ecea983d2c743dc4a1e93`

 Versions:
 ```
--- a/eth/contracts/auction/HermezAuctionProtocol.go
+++ b/eth/contracts/auction/HermezAuctionProtocol.go
--- a/eth/contracts/erc20.sol
+++ b/eth/contracts/erc20.sol
@@ -1,19 +0,0 @@
-pragma solidity ^0.7.0;
-
-contract ERC20 {
-    string public constant name = "";
-    string public constant symbol = "";
-    uint8 public constant decimals = 0;
-
-    /*
-    function totalSupply() public constant returns (uint);
-    function balanceOf(address tokenOwner) public constant returns (uint balance);
-    function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
-    function transfer(address to, uint tokens) public returns (bool success);
-    function approve(address spender, uint tokens) public returns (bool success);
-    function transferFrom(address from, address to, uint tokens) public returns (bool success);
-
-    event Transfer(address indexed from, address indexed to, uint tokens);
-    event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
-    */
-}
--- a/eth/contracts/erc20/erc20.go
+++ b/eth/contracts/erc20/erc20.go
@@ -1,274 +0,0 @@
-// Code generated - DO NOT EDIT.
-// This file is a generated binding and any manual changes will be lost.
-
-package erc20
-
-import (
-	"math/big"
-	"strings"
-
-	ethereum "github.com/ethereum/go-ethereum"
-	"github.com/ethereum/go-ethereum/accounts/abi"
-	"github.com/ethereum/go-ethereum/accounts/abi/bind"
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ethereum/go-ethereum/event"
-)
-
-// Reference imports to suppress errors if they are not otherwise used.
-var (
-	_ = big.NewInt
-	_ = strings.NewReader
-	_ = ethereum.NotFound
-	_ = bind.Bind
-	_ = common.Big1
-	_ = types.BloomLookup
-	_ = event.NewSubscription
-)
-
-// ERC20ABI is the input ABI used to generate the binding from.
-const ERC20ABI = "[{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"}]"
-
-// ERC20FuncSigs maps the 4-byte function signature to its string representation.
-var ERC20FuncSigs = map[string]string{
-	"313ce567": "decimals()",
-	"06fdde03": "name()",
-	"95d89b41": "symbol()",
-}
-
-// ERC20Bin is the compiled bytecode used for deploying new contracts.
-var ERC20Bin = "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"
-
-// DeployERC20 deploys a new Ethereum contract, binding an instance of ERC20 to it.
-func DeployERC20(auth *bind.TransactOpts, backend bind.ContractBackend) (common.Address, *types.Transaction, *ERC20, error) {
-	parsed, err := abi.JSON(strings.NewReader(ERC20ABI))
-	if err != nil {
-		return common.Address{}, nil, nil, err
-	}
-
-	address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(ERC20Bin), backend)
-	if err != nil {
-		return common.Address{}, nil, nil, err
-	}
-	return address, tx, &ERC20{ERC20Caller: ERC20Caller{contract: contract}, ERC20Transactor: ERC20Transactor{contract: contract}, ERC20Filterer: ERC20Filterer{contract: contract}}, nil
-}
-
-// ERC20 is an auto generated Go binding around an Ethereum contract.
-type ERC20 struct {
-	ERC20Caller     // Read-only binding to the contract
-	ERC20Transactor // Write-only binding to the contract
-	ERC20Filterer   // Log filterer for contract events
-}
-
-// ERC20Caller is an auto generated read-only Go binding around an Ethereum contract.
-type ERC20Caller struct {
-	contract *bind.BoundContract // Generic contract wrapper for the low level calls
-}
-
-// ERC20Transactor is an auto generated write-only Go binding around an Ethereum contract.
-type ERC20Transactor struct {
-	contract *bind.BoundContract // Generic contract wrapper for the low level calls
-}
-
-// ERC20Filterer is an auto generated log filtering Go binding around an Ethereum contract events.
-type ERC20Filterer struct {
-	contract *bind.BoundContract // Generic contract wrapper for the low level calls
-}
-
-// ERC20Session is an auto generated Go binding around an Ethereum contract,
-// with pre-set call and transact options.
-type ERC20Session struct {
-	Contract     *ERC20            // Generic contract binding to set the session for
-	CallOpts     bind.CallOpts     // Call options to use throughout this session
-	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
-}
-
-// ERC20CallerSession is an auto generated read-only Go binding around an Ethereum contract,
-// with pre-set call options.
-type ERC20CallerSession struct {
-	Contract *ERC20Caller  // Generic contract caller binding to set the session for
-	CallOpts bind.CallOpts // Call options to use throughout this session
-}
-
-// ERC20TransactorSession is an auto generated write-only Go binding around an Ethereum contract,
-// with pre-set transact options.
-type ERC20TransactorSession struct {
-	Contract     *ERC20Transactor  // Generic contract transactor binding to set the session for
-	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
-}
-
-// ERC20Raw is an auto generated low-level Go binding around an Ethereum contract.
-type ERC20Raw struct {
-	Contract *ERC20 // Generic contract binding to access the raw methods on
-}
-
-// ERC20CallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
-type ERC20CallerRaw struct {
-	Contract *ERC20Caller // Generic read-only contract binding to access the raw methods on
-}
-
-// ERC20TransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
-type ERC20TransactorRaw struct {
-	Contract *ERC20Transactor // Generic write-only contract binding to access the raw methods on
-}
-
-// NewERC20 creates a new instance of ERC20, bound to a specific deployed contract.
-func NewERC20(address common.Address, backend bind.ContractBackend) (*ERC20, error) {
-	contract, err := bindERC20(address, backend, backend, backend)
-	if err != nil {
-		return nil, err
-	}
-	return &ERC20{ERC20Caller: ERC20Caller{contract: contract}, ERC20Transactor: ERC20Transactor{contract: contract}, ERC20Filterer: ERC20Filterer{contract: contract}}, nil
-}
-
-// NewERC20Caller creates a new read-only instance of ERC20, bound to a specific deployed contract.
-func NewERC20Caller(address common.Address, caller bind.ContractCaller) (*ERC20Caller, error) {
-	contract, err := bindERC20(address, caller, nil, nil)
-	if err != nil {
-		return nil, err
-	}
-	return &ERC20Caller{contract: contract}, nil
-}
-
-// NewERC20Transactor creates a new write-only instance of ERC20, bound to a specific deployed contract.
-func NewERC20Transactor(address common.Address, transactor bind.ContractTransactor) (*ERC20Transactor, error) {
-	contract, err := bindERC20(address, nil, transactor, nil)
-	if err != nil {
-		return nil, err
-	}
-	return &ERC20Transactor{contract: contract}, nil
-}
-
-// NewERC20Filterer creates a new log filterer instance of ERC20, bound to a specific deployed contract.
-func NewERC20Filterer(address common.Address, filterer bind.ContractFilterer) (*ERC20Filterer, error) {
-	contract, err := bindERC20(address, nil, nil, filterer)
-	if err != nil {
-		return nil, err
-	}
-	return &ERC20Filterer{contract: contract}, nil
-}
-
-// bindERC20 binds a generic wrapper to an already deployed contract.
-func bindERC20(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
-	parsed, err := abi.JSON(strings.NewReader(ERC20ABI))
-	if err != nil {
-		return nil, err
-	}
-	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
-}
-
-// Call invokes the (constant) contract method with params as input values and
-// sets the output to result. The result type might be a single field for simple
-// returns, a slice of interfaces for anonymous returns and a struct for named
-// returns.
-func (_ERC20 *ERC20Raw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
-	return _ERC20.Contract.ERC20Caller.contract.Call(opts, result, method, params...)
-}
-
-// Transfer initiates a plain transaction to move funds to the contract, calling
-// its default method if one is available.
-func (_ERC20 *ERC20Raw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
-	return _ERC20.Contract.ERC20Transactor.contract.Transfer(opts)
-}
-
-// Transact invokes the (paid) contract method with params as input values.
-func (_ERC20 *ERC20Raw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
-	return _ERC20.Contract.ERC20Transactor.contract.Transact(opts, method, params...)
-}
-
-// Call invokes the (constant) contract method with params as input values and
-// sets the output to result. The result type might be a single field for simple
-// returns, a slice of interfaces for anonymous returns and a struct for named
-// returns.
-func (_ERC20 *ERC20CallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
-	return _ERC20.Contract.contract.Call(opts, result, method, params...)
-}
-
-// Transfer initiates a plain transaction to move funds to the contract, calling
-// its default method if one is available.
-func (_ERC20 *ERC20TransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
-	return _ERC20.Contract.contract.Transfer(opts)
-}
-
-// Transact invokes the (paid) contract method with params as input values.
-func (_ERC20 *ERC20TransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
-	return _ERC20.Contract.contract.Transact(opts, method, params...)
-}
-
-// Decimals is a free data retrieval call binding the contract method 0x313ce567.
-//
-// Solidity: function decimals() view returns(uint8)
-func (_ERC20 *ERC20Caller) Decimals(opts *bind.CallOpts) (uint8, error) {
-	var (
-		ret0 = new(uint8)
-	)
-	out := ret0
-	err := _ERC20.contract.Call(opts, out, "decimals")
-	return *ret0, err
-}
-
-// Decimals is a free data retrieval call binding the contract method 0x313ce567.
-//
-// Solidity: function decimals() view returns(uint8)
-func (_ERC20 *ERC20Session) Decimals() (uint8, error) {
-	return _ERC20.Contract.Decimals(&_ERC20.CallOpts)
-}
-
-// Decimals is a free data retrieval call binding the contract method 0x313ce567.
-//
-// Solidity: function decimals() view returns(uint8)
-func (_ERC20 *ERC20CallerSession) Decimals() (uint8, error) {
-	return _ERC20.Contract.Decimals(&_ERC20.CallOpts)
-}
-
-// Name is a free data retrieval call binding the contract method 0x06fdde03.
-//
-// Solidity: function name() view returns(string)
-func (_ERC20 *ERC20Caller) Name(opts *bind.CallOpts) (string, error) {
-	var (
-		ret0 = new(string)
-	)
-	out := ret0
-	err := _ERC20.contract.Call(opts, out, "name")
-	return *ret0, err
-}
-
-// Name is a free data retrieval call binding the contract method 0x06fdde03.
-//
-// Solidity: function name() view returns(string)
-func (_ERC20 *ERC20Session) Name() (string, error) {
-	return _ERC20.Contract.Name(&_ERC20.CallOpts)
-}
-
-// Name is a free data retrieval call binding the contract method 0x06fdde03.
-//
-// Solidity: function name() view returns(string)
-func (_ERC20 *ERC20CallerSession) Name() (string, error) {
-	return _ERC20.Contract.Name(&_ERC20.CallOpts)
-}
-
-// Symbol is a free data retrieval call binding the contract method 0x95d89b41.
-//
-// Solidity: function symbol() view returns(string)
-func (_ERC20 *ERC20Caller) Symbol(opts *bind.CallOpts) (string, error) {
-	var (
-		ret0 = new(string)
-	)
-	out := ret0
-	err := _ERC20.contract.Call(opts, out, "symbol")
-	return *ret0, err
-}
-
-// Symbol is a free data retrieval call binding the contract method 0x95d89b41.
-//
-// Solidity: function symbol() view returns(string)
-func (_ERC20 *ERC20Session) Symbol() (string, error) {
-	return _ERC20.Contract.Symbol(&_ERC20.CallOpts)
-}
-
-// Symbol is a free data retrieval call binding the contract method 0x95d89b41.
-//
-// Solidity: function symbol() view returns(string)
-func (_ERC20 *ERC20CallerSession) Symbol() (string, error) {
-	return _ERC20.Contract.Symbol(&_ERC20.CallOpts)
-}
--- a/eth/contracts/erc777/ERC777.go
+++ b/eth/contracts/erc777/ERC777.go
--- a/eth/contracts/hermez/Hermez.go
+++ b/eth/contracts/hermez/Hermez.go
--- a/eth/contracts/tokenHEZ/HEZ.go
+++ b/eth/contracts/tokenHEZ/HEZ.go
--- a/eth/contracts/withdrawdelayer/WithdrawalDelayer.go
+++ b/eth/contracts/withdrawdelayer/WithdrawalDelayer.go
--- a/eth/ethereum.go
+++ b/eth/ethereum.go
@@ -13,7 +13,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/hermeznetwork/hermez-node/common"
-	"github.com/hermeznetwork/hermez-node/eth/contracts/erc20"
+	HEZ "github.com/hermeznetwork/hermez-node/eth/contracts/tokenHEZ"
 	"github.com/hermeznetwork/hermez-node/log"
 )

@@ -277,7 +277,9 @@ func (c *EthereumClient) EthBlockByNumber(ctx context.Context, number int64) (*c

 // EthERC20Consts returns the constants defined for a particular ERC20 Token instance.
 func (c *EthereumClient) EthERC20Consts(tokenAddress ethCommon.Address) (*ERC20Consts, error) {
-	instance, err := erc20.NewERC20(tokenAddress, c.client)
+	// We use the HEZ token smart contract interfacehere because it's an
+	// ERC20, which allows us to access the standard ERC20 constants.
+	instance, err := HEZ.NewHEZ(tokenAddress, c.client)
 	if err != nil {
 		return nil, err
 	}
--- a/eth/ethereum_test.go
+++ b/eth/ethereum_test.go
@@ -13,9 +13,9 @@ func TestEthERC20(t *testing.T) {
 	require.Nil(t, err)
 	client := NewEthereumClient(ethClient, accountAux, ks, nil)

-	consts, err := client.EthERC20Consts(tokenERC20AddressConst)
+	consts, err := client.EthERC20Consts(tokenHEZAddressConst)
 	require.Nil(t, err)
-	assert.Equal(t, "ERC20_0", consts.Name)
-	assert.Equal(t, "20_0", consts.Symbol)
+	assert.Equal(t, "Hermez Network Token", consts.Name)
+	assert.Equal(t, "HEZ", consts.Symbol)
 	assert.Equal(t, uint64(18), consts.Decimals)
 }
--- a/eth/helpers.go
+++ b/eth/helpers.go
@@ -2,9 +2,13 @@ package eth

 import (
 	"fmt"
+	"math/big"
 	"net/http"
 	"strconv"
 	"strings"
+
+	ethCommon "github.com/ethereum/go-ethereum/common"
+	"golang.org/x/crypto/sha3"
 )

 func addBlock(url string) {
@@ -61,3 +65,90 @@ func addTime(seconds float64, url string) {
 		}
 	}()
 }
+
+func createPermitDigest(tokenAddr, owner, spender ethCommon.Address, chainID, value, nonce, deadline *big.Int, tokenName string) ([]byte, error) {
+	// NOTE: We ignore hash.Write errors because we are writing to a memory
+	// buffer and don't expect any errors to occur.
+	abiPermit := []byte("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)")
+	hashPermit := sha3.NewLegacyKeccak256()
+	hashPermit.Write(abiPermit) //nolint:errcheck,gosec
+	abiEIP712Domain := []byte("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)")
+	hashEIP712Domain := sha3.NewLegacyKeccak256()
+	hashEIP712Domain.Write(abiEIP712Domain) //nolint:errcheck,gosec
+	var encodeBytes []byte
+	paddedHash := ethCommon.LeftPadBytes(hashEIP712Domain.Sum(nil), 32)
+	hashName := sha3.NewLegacyKeccak256()
+	hashName.Write([]byte(tokenName)) //nolint:errcheck,gosec
+	paddedName := ethCommon.LeftPadBytes(hashName.Sum(nil), 32)
+	hashVersion := sha3.NewLegacyKeccak256()
+	hashVersion.Write([]byte("1")) //nolint:errcheck,gosec
+	paddedX := ethCommon.LeftPadBytes(hashVersion.Sum(nil), 32)
+	paddedChainID := ethCommon.LeftPadBytes(chainID.Bytes(), 32)
+	paddedAddr := ethCommon.LeftPadBytes(tokenAddr.Bytes(), 32)
+	encodeBytes = append(encodeBytes, paddedHash...)
+	encodeBytes = append(encodeBytes, paddedName...)
+	encodeBytes = append(encodeBytes, paddedX...)
+	encodeBytes = append(encodeBytes, paddedChainID...)
+	encodeBytes = append(encodeBytes, paddedAddr...)
+	_domainSeparator := sha3.NewLegacyKeccak256()
+	_domainSeparator.Write(encodeBytes) //nolint:errcheck,gosec
+
+	var bytes1 []byte
+	paddedHashPermit := ethCommon.LeftPadBytes(hashPermit.Sum(nil), 32)
+	paddedOwner := ethCommon.LeftPadBytes(owner.Bytes(), 32)
+	paddedSpender := ethCommon.LeftPadBytes(spender.Bytes(), 32)
+	paddedValue := ethCommon.LeftPadBytes(value.Bytes(), 32)
+	paddedNonce := ethCommon.LeftPadBytes(nonce.Bytes(), 32)
+	paddedDeadline := ethCommon.LeftPadBytes(deadline.Bytes(), 32)
+	bytes1 = append(bytes1, paddedHashPermit...)
+	bytes1 = append(bytes1, paddedOwner...)
+	bytes1 = append(bytes1, paddedSpender...)
+	bytes1 = append(bytes1, paddedValue...)
+	bytes1 = append(bytes1, paddedNonce...)
+	bytes1 = append(bytes1, paddedDeadline...)
+	hashBytes1 := sha3.NewLegacyKeccak256()
+	hashBytes1.Write(bytes1) //nolint:errcheck,gosec
+
+	var bytes2 []byte
+	paddedY := ethCommon.LeftPadBytes([]byte{0x19}, 1)
+	paddedZ := ethCommon.LeftPadBytes([]byte{0x01}, 1)
+	paddedDomainSeparator := ethCommon.LeftPadBytes(_domainSeparator.Sum(nil), 32)
+	paddedHashBytes1 := ethCommon.LeftPadBytes(hashBytes1.Sum(nil), 32)
+	bytes2 = append(bytes2, paddedY...)
+	bytes2 = append(bytes2, paddedZ...)
+	bytes2 = append(bytes2, paddedDomainSeparator...)
+	bytes2 = append(bytes2, paddedHashBytes1...)
+	hashBytes2 := sha3.NewLegacyKeccak256()
+	hashBytes2.Write(bytes2) //nolint:errcheck,gosec
+
+	return hashBytes2.Sum(nil), nil
+}
+
+func createPermit(owner, spender ethCommon.Address, amount, deadline *big.Int, digest, signature []byte) []byte {
+	r := signature[0:32]
+	s := signature[32:64]
+	v := signature[64] + byte(27) //nolint:gomnd
+
+	ABIpermit := []byte("permit(address,address,uint256,uint256,uint8,bytes32,bytes32)")
+	hash := sha3.NewLegacyKeccak256()
+	hash.Write(ABIpermit) //nolint:errcheck,gosec
+	methodID := hash.Sum(nil)[:4]
+
+	var permit []byte
+	paddedOwner := ethCommon.LeftPadBytes(owner.Bytes(), 32)
+	paddedSpender := ethCommon.LeftPadBytes(spender.Bytes(), 32)
+	paddedAmount := ethCommon.LeftPadBytes(amount.Bytes(), 32)
+	paddedDeadline := ethCommon.LeftPadBytes(deadline.Bytes(), 32)
+	paddedV := ethCommon.LeftPadBytes([]byte{v}, 32)
+
+	permit = append(permit, methodID...)
+	permit = append(permit, paddedOwner...)
+	permit = append(permit, paddedSpender...)
+	permit = append(permit, paddedAmount...)
+	permit = append(permit, paddedDeadline...)
+	permit = append(permit, paddedV...)
+	permit = append(permit, r...)
+	permit = append(permit, s...)
+
+	return permit
+}
--- a/eth/main_test.go
+++ b/eth/main_test.go
@@ -1,8 +1,11 @@
 package eth

 import (
+	"fmt"
 	"io/ioutil"
+	"math/big"
 	"os"
+	"strconv"
 	"testing"

 	"github.com/ethereum/go-ethereum/accounts"
@@ -10,40 +13,32 @@ import (
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/joho/godotenv"
 )

-/*var donationAddressStr = os.Getenv("DONATION_ADDRESS")
-var bootCoordinatorStr = os.Getenv("BOOT_COORDINATOR_ADDRESS")
-var auctionAddressStr = os.Getenv("AUCTION_ADDRESS")
-var tokenHezStr = os.Getenv("TOKEN_ADDRESS")
-var hermezStr = os.Getenv("HERMEZ_ADDRESS")
-var governanceAddressStr = os.Getenv("GOV_ADDRESS")
-var governancePrivateKey = os.Getenv("GOV_PK")
-var ethClientDialURL = os.Getenv("ETHCLIENT_DIAL_URL")*/
-var ethClientDialURL = "http://localhost:8545"
-var password = "pass"
+var errEnvVar = fmt.Errorf("Some environment variable is missing")
+
+var (
+	ethClientDialURL = "http://localhost:8545"
+	password         = "pass"
+	deadline, _      = new(big.Int).SetString("ffffffffffffffffffffffffffffffff", 16)
+)

 // Smart Contract Addresses
 var (
-	auctionAddressStr           = "0x500D1d6A4c7D8Ae28240b47c8FCde034D827fD5e"
-	auctionAddressConst         = ethCommon.HexToAddress(auctionAddressStr)
-	auctionTestAddressStr       = "0x1d80315fac6aBd3EfeEbE97dEc44461ba7556160"
-	auctionTestAddressConst     = ethCommon.HexToAddress(auctionTestAddressStr)
+	genesisBlock             int64
+	auctionAddressConst      ethCommon.Address
+	auctionTestAddressConst  ethCommon.Address
+	tokenHEZAddressConst     ethCommon.Address
+	hermezRollupAddressConst ethCommon.Address
+	wdelayerAddressConst     ethCommon.Address
+	wdelayerTestAddressConst ethCommon.Address
+	tokenHEZ                 TokenConfig
+
 	donationAddressStr          = "0x6c365935CA8710200C7595F0a72EB6023A7706Cd"
 	donationAddressConst        = ethCommon.HexToAddress(donationAddressStr)
 	bootCoordinatorAddressStr   = "0xc783df8a850f42e7f7e57013759c285caa701eb6"
 	bootCoordinatorAddressConst = ethCommon.HexToAddress(bootCoordinatorAddressStr)
-	tokenERC777AddressStr       = "0xf784709d2317D872237C4bC22f867d1BAe2913AB" //nolint:gosec
-	tokenERC777AddressConst     = ethCommon.HexToAddress(tokenERC777AddressStr)
-	tokenERC20AddressStr        = "0x3619DbE27d7c1e7E91aA738697Ae7Bc5FC3eACA5" //nolint:gosec
-	tokenERC20AddressConst      = ethCommon.HexToAddress(tokenERC20AddressStr)
-	tokenHEZAddressConst        = tokenERC777AddressConst
-	hermezRollupAddressStr      = "0xEcc0a6dbC0bb4D51E4F84A315a9e5B0438cAD4f0"
-	hermezRollupAddressConst    = ethCommon.HexToAddress(hermezRollupAddressStr)
-	wdelayerAddressStr          = "0xD6C850aeBFDC46D7F4c207e445cC0d6B0919BDBe"
-	wdelayerAddressConst        = ethCommon.HexToAddress(wdelayerAddressStr)
-	wdelayerTestAddressStr      = "0x52d3b94181f8654db2530b0fEe1B19173f519C52"
-	wdelayerTestAddressConst    = ethCommon.HexToAddress(wdelayerTestAddressStr)
 	safetyAddressStr            = "0xE5904695748fe4A84b40b3fc79De2277660BD1D3"
 	safetyAddressConst          = ethCommon.HexToAddress(safetyAddressStr)
 )
@@ -70,6 +65,10 @@ var (
 	auxAddressStr   = "0x3d91185a02774C70287F6c74Dd26d13DFB58ff16"
 	auxAddressConst = ethCommon.HexToAddress(auxAddressStr)

+	aux2AddressSK = "28d1bfbbafe9d1d4f5a11c3c16ab6bf9084de48d99fbac4058bdfa3c80b29087"
+	// aux2AddressStr = "0x532792b73c0c6e7565912e7039c59986f7e1dd1f"
+	// aux2AddressConst = ethCommon.HexToAddress(aux2AddressStr)
+
 	hermezRollupTestSK           = "28d1bfbbafe9d1d4f5a11c3c16ab6bf9084de48d99fbac4058bdfa3c80b29088"
 	hermezRollupTestAddressStr   = "0xEa960515F8b4C237730F028cBAcF0a28E7F45dE0"
 	hermezRollupAddressTestConst = ethCommon.HexToAddress(hermezRollupTestAddressStr)
@@ -81,6 +80,7 @@ var (
 	accountWhite         *accounts.Account
 	accountGovDAO        *accounts.Account
 	accountAux           *accounts.Account
+	accountAux2          *accounts.Account
 	accountHermez        *accounts.Account
 	ks                   *keystore.KeyStore
 	ethClient            *ethclient.Client
@@ -88,6 +88,7 @@ var (
 	ethereumClientKep    *EthereumClient
 	ethereumClientGovDAO *EthereumClient
 	ethereumClientAux    *EthereumClient
+	ethereumClientAux2   *EthereumClient
 	ethereumClientHermez *EthereumClient
 )

@@ -107,10 +108,45 @@ func addKey(ks *keystore.KeyStore, skHex string) *accounts.Account {
 	return &account
 }

+func getEnvVariables() {
+	err := godotenv.Load()
+	if err != nil {
+		fmt.Println("Variables loaded from environment")
+	} else {
+		fmt.Println("Variables loaded from .env file")
+	}
+	var auctionAddressStr = os.Getenv("AUCTION")
+	var auctionTestAddressStr = os.Getenv("AUCTION_TEST")
+	var tokenHEZAddressStr = os.Getenv("TOKENHEZ")
+	var hermezRollupAddressStr = os.Getenv("HERMEZ")
+	var wdelayerAddressStr = os.Getenv("WDELAYER")
+	var wdelayerTestAddressStr = os.Getenv("WDELAYER_TEST")
+	genesisBlockEnv := os.Getenv("GENESIS_BLOCK")
+	genesisBlock, err = strconv.ParseInt(genesisBlockEnv, 10, 64)
+	if err != nil {
+		panic(errEnvVar)
+	}
+	if auctionAddressStr == "" || auctionTestAddressStr == "" || tokenHEZAddressStr == "" || hermezRollupAddressStr == "" || wdelayerAddressStr == "" || wdelayerTestAddressStr == "" || genesisBlockEnv == "" {
+		panic(errEnvVar)
+	}
+
+	auctionAddressConst = ethCommon.HexToAddress(auctionAddressStr)
+	auctionTestAddressConst = ethCommon.HexToAddress(auctionTestAddressStr)
+	tokenHEZAddressConst = ethCommon.HexToAddress(tokenHEZAddressStr)
+	hermezRollupAddressConst = ethCommon.HexToAddress(hermezRollupAddressStr)
+	wdelayerAddressConst = ethCommon.HexToAddress(wdelayerAddressStr)
+	wdelayerTestAddressConst = ethCommon.HexToAddress(wdelayerTestAddressStr)
+	tokenHEZ = TokenConfig{
+		Address: tokenHEZAddressConst,
+		Name:    "Hermez Network Token",
+	}
+}
+
 func TestMain(m *testing.M) {
 	exitVal := 0

 	if os.Getenv("INTEGRATION") != "" {
+		getEnvVariables()
 		dir, err := ioutil.TempDir("", "tmpks")
 		if err != nil {
 			panic(err)
@@ -128,6 +164,7 @@ func TestMain(m *testing.M) {
 		accountWhite = addKey(ks, whiteHackGroupAddressSK)
 		accountGovDAO = addKey(ks, hermezGovernanceDAOAddressSK)
 		accountAux = addKey(ks, auxAddressSK)
+		accountAux2 = addKey(ks, aux2AddressSK)
 		accountHermez = addKey(ks, hermezRollupTestSK)

 		ethClient, err = ethclient.Dial(ethClientDialURL)
@@ -136,17 +173,16 @@ func TestMain(m *testing.M) {
 		}

 		// Controllable Governance Address
-
 		ethereumClientGov := NewEthereumClient(ethClient, accountGov, ks, nil)
-		auctionClient, err = NewAuctionClient(ethereumClientGov, auctionAddressConst, tokenHEZAddressConst)
+		auctionClient, err = NewAuctionClient(ethereumClientGov, auctionAddressConst, tokenHEZ)
 		if err != nil {
 			panic(err)
 		}
-		auctionClientTest, err = NewAuctionClient(ethereumClientGov, auctionTestAddressConst, tokenHEZAddressConst)
+		auctionClientTest, err = NewAuctionClient(ethereumClientGov, auctionTestAddressConst, tokenHEZ)
 		if err != nil {
 			panic(err)
 		}
-		rollupClient, err = NewRollupClient(ethereumClientGov, hermezRollupAddressConst, tokenHEZAddressConst)
+		rollupClient, err = NewRollupClient(ethereumClientGov, hermezRollupAddressConst, tokenHEZ)
 		if err != nil {
 			panic(err)
 		}
@@ -163,6 +199,7 @@ func TestMain(m *testing.M) {
 		ethereumClientWhite = NewEthereumClient(ethClient, accountWhite, ks, nil)
 		ethereumClientGovDAO = NewEthereumClient(ethClient, accountGovDAO, ks, nil)
 		ethereumClientAux = NewEthereumClient(ethClient, accountAux, ks, nil)
+		ethereumClientAux2 = NewEthereumClient(ethClient, accountAux2, ks, nil)
 		ethereumClientHermez = NewEthereumClient(ethClient, accountHermez, ks, nil)

 		exitVal = m.Run()
--- a/eth/rollup.go
+++ b/eth/rollup.go
@@ -14,11 +14,10 @@ import (
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/hermeznetwork/hermez-node/common"
-	ERC777 "github.com/hermeznetwork/hermez-node/eth/contracts/erc777"
 	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/iden3/go-iden3-crypto/babyjub"
-	"golang.org/x/crypto/sha3"
 )

 const (
@@ -259,13 +258,13 @@ type RollupInterface interface {
 	// Public Functions

 	RollupForgeBatch(*RollupForgeBatchArgs) (*types.Transaction, error)
-	RollupAddToken(tokenAddress ethCommon.Address, feeAddToken *big.Int) (*types.Transaction, error)
+	RollupAddToken(tokenAddress ethCommon.Address, feeAddToken, deadline *big.Int) (*types.Transaction, error)

 	RollupWithdrawMerkleProof(babyPubKey *babyjub.PublicKey, tokenID uint32, numExitRoot, idx int64, amount *big.Int, siblings []*big.Int, instantWithdraw bool) (*types.Transaction, error)
 	RollupWithdrawCircuit(proofA, proofC [2]*big.Int, proofB [2][2]*big.Int, tokenID uint32, numExitRoot, idx int64, amount *big.Int, instantWithdraw bool) (*types.Transaction, error)

 	RollupL1UserTxERC20ETH(fromBJJ *babyjub.PublicKey, fromIdx int64, loadAmount *big.Int, amount *big.Int, tokenID uint32, toIdx int64) (*types.Transaction, error)
-	RollupL1UserTxERC777(fromBJJ *babyjub.PublicKey, fromIdx int64, loadAmount *big.Int, amount *big.Int, tokenID uint32, toIdx int64) (*types.Transaction, error)
+	RollupL1UserTxERC20Permit(fromBJJ *babyjub.PublicKey, fromIdx int64, loadAmount *big.Int, amount *big.Int, tokenID uint32, toIdx int64, deadline *big.Int) (tx *types.Transaction, err error)

 	// Governance Public Functions
 	RollupUpdateForgeL1L2BatchTimeout(newForgeL1L2BatchTimeout int64) (*types.Transaction, error)
@@ -289,15 +288,16 @@ type RollupInterface interface {

 // RollupClient is the implementation of the interface to the Rollup Smart Contract in ethereum.
 type RollupClient struct {
-	client          *EthereumClient
-	address         ethCommon.Address
-	tokenHEZAddress ethCommon.Address
-	hermez          *Hermez.Hermez
-	contractAbi     abi.ABI
+	client      *EthereumClient
+	address     ethCommon.Address
+	tokenHEZCfg TokenConfig
+	hermez      *Hermez.Hermez
+	tokenHEZ    *HEZ.HEZ
+	contractAbi abi.ABI
 }

 // NewRollupClient creates a new RollupClient
-func NewRollupClient(client *EthereumClient, address ethCommon.Address, tokenHEZAddress ethCommon.Address) (*RollupClient, error) {
+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
@@ -306,12 +306,17 @@ func NewRollupClient(client *EthereumClient, address ethCommon.Address, tokenHEZ
 	if err != nil {
 		return nil, err
 	}
+	tokenHEZ, err := HEZ.NewHEZ(tokenHEZCfg.Address, client.Client())
+	if err != nil {
+		return nil, err
+	}
 	return &RollupClient{
-		client:          client,
-		address:         address,
-		tokenHEZAddress: tokenHEZAddress,
-		hermez:          hermez,
-		contractAbi:     contractAbi,
+		client:      client,
+		address:     address,
+		tokenHEZCfg: tokenHEZCfg,
+		hermez:      hermez,
+		tokenHEZ:    tokenHEZ,
+		contractAbi: contractAbi,
 	}, nil
 }

@@ -372,26 +377,24 @@ func (c *RollupClient) RollupForgeBatch(args *RollupForgeBatchArgs) (tx *types.T
 // RollupAddToken is the interface to call the smart contract function.
 // `feeAddToken` is the amount of HEZ tokens that will be paid to add the
 // token.  `feeAddToken` must match the public value of the smart contract.
-func (c *RollupClient) RollupAddToken(tokenAddress ethCommon.Address, feeAddToken *big.Int) (tx *types.Transaction, err error) {
+func (c *RollupClient) RollupAddToken(tokenAddress ethCommon.Address, feeAddToken, deadline *big.Int) (tx *types.Transaction, err error) {
 	if tx, err = c.client.CallAuth(
 		0,
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
-			tokens, err := ERC777.NewERC777(c.tokenHEZAddress, ec)
+			owner := c.client.account.Address
+			spender := c.address
+			nonce, err := c.tokenHEZ.Nonces(nil, owner)
 			if err != nil {
 				return nil, err
 			}
-			addTokenFnSignature := []byte("addToken(address)")
-			hash := sha3.NewLegacyKeccak256()
-			_, err = hash.Write(addTokenFnSignature)
-			if err != nil {
-				return nil, err
-			}
-			methodID := hash.Sum(nil)[:4]
-			var data []byte
-			data = append(data, methodID...)
-			paddedAddress := ethCommon.LeftPadBytes(tokenAddress.Bytes(), 32)
-			data = append(data, paddedAddress[:]...)
-			return tokens.Send(auth, c.address, feeAddToken, data)
+			tokenName := c.tokenHEZCfg.Name
+			tokenAddr := c.tokenHEZCfg.Address
+			chainid, _ := c.client.Client().ChainID(context.Background())
+			digest, _ := createPermitDigest(tokenAddr, owner, spender, chainid, feeAddToken, nonce, deadline, tokenName)
+			signature, _ := c.client.ks.SignHash(*c.client.account, digest)
+			permit := createPermit(owner, spender, feeAddToken, deadline, digest, signature)
+
+			return c.hermez.AddToken(auth, tokenAddress, permit)
 		},
 	); err != nil {
 		return nil, fmt.Errorf("Failed add Token %w", err)
@@ -404,16 +407,12 @@ func (c *RollupClient) RollupWithdrawMerkleProof(fromBJJ *babyjub.PublicKey, tok
 	if tx, err = c.client.CallAuth(
 		0,
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
-			hermez, err := Hermez.NewHermez(c.address, ec)
-			if err != nil {
-				return nil, err
-			}
 			pkCompL := fromBJJ.Compress()
 			pkCompB := common.SwapEndianness(pkCompL[:])
 			babyPubKey := new(big.Int).SetBytes(pkCompB)
 			numExitRootB := big.NewInt(numExitRoot)
 			idxBig := big.NewInt(idx)
-			return hermez.WithdrawMerkleProof(auth, tokenID, amount, babyPubKey, numExitRootB, siblings, idxBig, instantWithdraw)
+			return c.hermez.WithdrawMerkleProof(auth, tokenID, amount, babyPubKey, numExitRootB, siblings, idxBig, instantWithdraw)
 		},
 	); err != nil {
 		return nil, fmt.Errorf("Failed update WithdrawMerkleProof: %w", err)
@@ -432,16 +431,11 @@ func (c *RollupClient) RollupL1UserTxERC20ETH(fromBJJ *babyjub.PublicKey, fromId
 	if tx, err = c.client.CallAuth(
 		0,
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
-			hermez, err := Hermez.NewHermez(c.address, ec)
-			if err != nil {
-				return nil, err
-			}
 			pkCompL := fromBJJ.Compress()
 			pkCompB := common.SwapEndianness(pkCompL[:])
 			babyPubKey := new(big.Int).SetBytes(pkCompB)
 			fromIdxBig := big.NewInt(fromIdx)
 			toIdxBig := big.NewInt(toIdx)
-			tokenIDBig := uint32(tokenID)
 			loadAmountF, err := common.NewFloat16(loadAmount)
 			if err != nil {
 				return nil, err
@@ -453,7 +447,9 @@ func (c *RollupClient) RollupL1UserTxERC20ETH(fromBJJ *babyjub.PublicKey, fromId
 			if tokenID == 0 {
 				auth.Value = loadAmount
 			}
-			return hermez.AddL1Transaction(auth, babyPubKey, fromIdxBig, uint16(loadAmountF), uint16(amountF), tokenIDBig, toIdxBig)
+			var permit []byte
+			return c.hermez.AddL1Transaction(auth, babyPubKey, fromIdxBig, uint16(loadAmountF),
+				uint16(amountF), tokenID, toIdxBig, permit)
 		},
 	); err != nil {
 		return nil, fmt.Errorf("Failed add L1 Tx ERC20/ETH: %w", err)
@@ -461,59 +457,44 @@ func (c *RollupClient) RollupL1UserTxERC20ETH(fromBJJ *babyjub.PublicKey, fromId
 	return tx, nil
 }

-// RollupL1UserTxERC777 is the interface to call the smart contract function
-func (c *RollupClient) RollupL1UserTxERC777(fromBJJ *babyjub.PublicKey, fromIdx int64, loadAmount *big.Int, amount *big.Int, tokenID uint32, toIdx int64) (tx *types.Transaction, err error) {
+// RollupL1UserTxERC20Permit is the interface to call the smart contract function
+func (c *RollupClient) RollupL1UserTxERC20Permit(fromBJJ *babyjub.PublicKey, fromIdx int64, loadAmount *big.Int, amount *big.Int, tokenID uint32, toIdx int64, deadline *big.Int) (tx *types.Transaction, err error) {
 	if tx, err = c.client.CallAuth(
 		0,
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
-			tokens, err := ERC777.NewERC777(c.tokenHEZAddress, ec)
-			if err != nil {
-				return nil, err
-			}
-			addL1TxFnSignature := []byte("addL1Transaction(uint256,uint48,uint16,uint16,uint32,uint48)")
-			hash := sha3.NewLegacyKeccak256()
-			_, err = hash.Write(addL1TxFnSignature)
-			if err != nil {
-				return nil, err
-			}
-			methodID := hash.Sum(nil)[:4]
 			pkCompL := fromBJJ.Compress()
 			pkCompB := common.SwapEndianness(pkCompL[:])
-			paddedAddress := ethCommon.LeftPadBytes(pkCompB, 32)
-			fromIdxB, err := common.Idx(fromIdx).Bytes()
-			if err != nil {
-				return nil, err
-			}
-			paddedFromIdx := ethCommon.LeftPadBytes(fromIdxB[:], 32)
+			babyPubKey := new(big.Int).SetBytes(pkCompB)
+			fromIdxBig := big.NewInt(fromIdx)
+			toIdxBig := big.NewInt(toIdx)
 			loadAmountF, err := common.NewFloat16(loadAmount)
 			if err != nil {
 				return nil, err
 			}
-			paddedLoadAmount := ethCommon.LeftPadBytes(loadAmountF.Bytes(), 32)
 			amountF, err := common.NewFloat16(amount)
 			if err != nil {
 				return nil, err
 			}
-			paddedAmount := ethCommon.LeftPadBytes(amountF.Bytes(), 32)
-			tokenIDB := common.TokenID(tokenID).Bytes()
-			paddedTokenID := ethCommon.LeftPadBytes(tokenIDB, 32)
-			toIdxB, err := common.Idx(toIdx).Bytes()
+			if tokenID == 0 {
+				auth.Value = loadAmount
+			}
+			owner := c.client.account.Address
+			spender := c.address
+			nonce, err := c.tokenHEZ.Nonces(nil, owner)
 			if err != nil {
 				return nil, err
 			}
-			paddedToIdx := ethCommon.LeftPadBytes(toIdxB[:], 32)
-			var data []byte
-			data = append(data, methodID...)
-			data = append(data, paddedAddress[:]...)
-			data = append(data, paddedFromIdx[:]...)
-			data = append(data, paddedLoadAmount[:]...)
-			data = append(data, paddedAmount[:]...)
-			data = append(data, paddedTokenID[:]...)
-			data = append(data, paddedToIdx[:]...)
-			return tokens.Send(auth, c.address, loadAmount, data)
+			tokenName := c.tokenHEZCfg.Name
+			tokenAddr := c.tokenHEZCfg.Address
+			chainid, _ := c.client.Client().ChainID(context.Background())
+			digest, _ := createPermitDigest(tokenAddr, owner, spender, chainid, amount, nonce, deadline, tokenName)
+			signature, _ := c.client.ks.SignHash(*c.client.account, digest)
+			permit := createPermit(owner, spender, amount, deadline, digest, signature)
+			return c.hermez.AddL1Transaction(auth, babyPubKey, fromIdxBig, uint16(loadAmountF),
+				uint16(amountF), tokenID, toIdxBig, permit)
 		},
 	); err != nil {
-		return nil, fmt.Errorf("Failed add L1 Tx ERC777: %w", err)
+		return nil, fmt.Errorf("Failed add L1 Tx ERC20Permit: %w", err)
 	}
 	return tx, nil
 }
@@ -539,11 +520,7 @@ func (c *RollupClient) RollupUpdateForgeL1L2BatchTimeout(newForgeL1L2BatchTimeou
 	if tx, err = c.client.CallAuth(
 		0,
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
-			hermez, err := Hermez.NewHermez(c.address, ec)
-			if err != nil {
-				return nil, err
-			}
-			return hermez.UpdateForgeL1L2BatchTimeout(auth, uint8(newForgeL1L2BatchTimeout))
+			return c.hermez.UpdateForgeL1L2BatchTimeout(auth, uint8(newForgeL1L2BatchTimeout))
 		},
 	); err != nil {
 		return nil, fmt.Errorf("Failed update ForgeL1L2BatchTimeout: %w", err)
@@ -556,11 +533,7 @@ func (c *RollupClient) RollupUpdateFeeAddToken(newFeeAddToken *big.Int) (tx *typ
 	if tx, err = c.client.CallAuth(
 		0,
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
-			hermez, err := Hermez.NewHermez(c.address, ec)
-			if err != nil {
-				return nil, err
-			}
-			return hermez.UpdateFeeAddToken(auth, newFeeAddToken)
+			return c.hermez.UpdateFeeAddToken(auth, newFeeAddToken)
 		},
 	); err != nil {
 		return nil, fmt.Errorf("Failed update FeeAddToken: %w", err)
--- a/eth/rollup_test.go
+++ b/eth/rollup_test.go
@@ -26,7 +26,7 @@ var maxTx = int64(512)
 var nLevels = int64(32)

 var tokenIDERC777 uint32
-var tokenIDERC20 uint32
+var tokenHEZID uint32

 type keys struct {
 	BJJSecretKey *babyjub.PrivateKey
@@ -56,7 +56,7 @@ func TestRollupConstants(t *testing.T) {
 	require.Nil(t, err)
 	assert.Equal(t, absoluteMaxL1L2BatchTimeout, rollupConstants.AbsoluteMaxL1L2BatchTimeout)
 	assert.Equal(t, auctionAddressConst, rollupConstants.HermezAuctionContract)
-	assert.Equal(t, tokenERC777AddressConst, rollupConstants.TokenHEZ)
+	assert.Equal(t, tokenHEZAddressConst, rollupConstants.TokenHEZ)
 	assert.Equal(t, maxTx, rollupConstants.Verifiers[0].MaxTx)
 	assert.Equal(t, nLevels, rollupConstants.Verifiers[0].NLevels)
 	assert.Equal(t, governanceAddressConst, rollupConstants.HermezGovernanceDAOAddress)
@@ -72,29 +72,17 @@ func TestRollupRegisterTokensCount(t *testing.T) {

 func TestAddToken(t *testing.T) {
 	feeAddToken := big.NewInt(10)
-	// Addtoken ERC20
+	// Addtoken ERC20Permit
 	registerTokensCount, err := rollupClient.RollupRegisterTokensCount()
 	require.Nil(t, err)
-	_, err = rollupClient.RollupAddToken(tokenERC20AddressConst, feeAddToken)
+	_, err = rollupClient.RollupAddToken(tokenHEZAddressConst, feeAddToken, deadline)
 	require.Nil(t, err)
 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
 	rollupEvents, _, _ := rollupClient.RollupEventsByBlock(currentBlockNum)

-	assert.Equal(t, tokenERC20AddressConst, rollupEvents.AddToken[0].TokenAddress)
+	assert.Equal(t, tokenHEZAddressConst, rollupEvents.AddToken[0].TokenAddress)
 	assert.Equal(t, registerTokensCount, common.TokenID(rollupEvents.AddToken[0].TokenID).BigInt())
-	tokenIDERC20 = rollupEvents.AddToken[0].TokenID
-
-	// Addtoken ERC777
-	registerTokensCount, err = rollupClient.RollupRegisterTokensCount()
-	require.Nil(t, err)
-	_, err = rollupClient.RollupAddToken(tokenERC777AddressConst, feeAddToken)
-	require.Nil(t, err)
-	currentBlockNum, _ = rollupClient.client.EthCurrentBlock()
-	rollupEvents, _, _ = rollupClient.RollupEventsByBlock(currentBlockNum)
-
-	assert.Equal(t, tokenERC777AddressConst, rollupEvents.AddToken[0].TokenAddress)
-	assert.Equal(t, registerTokensCount, common.TokenID(rollupEvents.AddToken[0].TokenID).BigInt())
-	tokenIDERC777 = rollupEvents.AddToken[0].TokenID
+	tokenHEZID = rollupEvents.AddToken[0].TokenID
 }

 func TestRollupForgeBatch(t *testing.T) {
@@ -113,32 +101,17 @@ func TestRollupForgeBatch(t *testing.T) {
 	minBid.SetString("11000000000000000000", 10)
 	budget := new(big.Int)
 	budget.SetString("45200000000000000000", 10)
-	_, err = auctionClient.AuctionMultiBid(currentSlot+4, currentSlot+10, slotSet, maxBid, minBid, budget)
+	_, err = auctionClient.AuctionMultiBid(budget, currentSlot+4, currentSlot+10, slotSet, maxBid, minBid, deadline)
 	require.Nil(t, err)

 	// Add Blocks
-	blockNum := int64(int(BLOCKSPERSLOT)*int(currentSlot+4) + genesisBlock)
+	blockNum := int64(int(blocksPerSlot)*int(currentSlot+4) + int(genesisBlock))
 	currentBlockNum, _ := auctionClient.client.EthCurrentBlock()
 	blocksToAdd := blockNum - currentBlockNum
 	addBlocks(blocksToAdd, ethClientDialURL)

 	// Forge
 	args := new(RollupForgeBatchArgs)
-	// feeIdxCoordinatorBytes, err := hex.DecodeString("00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")
-	// require.Nil(t, err)
-	// lenFeeIdxCoordinatorBytes := int(4)
-	// numFeeIdxCoordinator := len(feeIdxCoordinatorBytes) / lenFeeIdxCoordinatorBytes
-	// for i := 0; i < numFeeIdxCoordinator; i++ {
-	// 	var paddedFeeIdx [6]byte
-	// 	if lenFeeIdxCoordinatorBytes < common.IdxBytesLen {
-	// 		copy(paddedFeeIdx[6-lenFeeIdxCoordinatorBytes:], feeIdxCoordinatorBytes[i*lenFeeIdxCoordinatorBytes:(i+1)*lenFeeIdxCoordinatorBytes])
-	// 	} else {
-	// 		copy(paddedFeeIdx[:], feeIdxCoordinatorBytes[i*lenFeeIdxCoordinatorBytes:(i+1)*lenFeeIdxCoordinatorBytes])
-	// 	}
-	// 	FeeIdxCoordinator, err := common.IdxFromBytes(paddedFeeIdx[:])
-	// 	require.Nil(t, err)
-	// 	args.FeeIdxCoordinator = append(args.FeeIdxCoordinator, FeeIdxCoordinator)
-	// }
 	args.FeeIdxCoordinator = []common.Idx{} // When encoded, 64 times the 0 idx means that no idx to collect fees is specified.
 	l1CoordinatorBytes, err := hex.DecodeString("1c660323607bb113e586183609964a333d07ebe4bef3be82ec13af453bae9590bd7711cdb6abf42f176eadfbe5506fbef5e092e5543733f91b0061d9a7747fa10694a915a6470fa230de387b51e6f4db0b09787867778687b55197ad6d6a86eac000000001")
 	require.Nil(t, err)
@@ -226,7 +199,7 @@ func TestRollupUpdateFeeAddToken(t *testing.T) {
 }

 func TestRollupL1UserTxETHCreateAccountDeposit(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(2)
 	fromIdxInt64 := int64(0)
@@ -255,7 +228,7 @@ func TestRollupL1UserTxETHCreateAccountDeposit(t *testing.T) {
 }

 func TestRollupL1UserTxERC20CreateAccountDeposit(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux2, err := NewRollupClient(ethereumClientAux2, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(1)
 	fromIdxInt64 := int64(0)
@@ -265,11 +238,11 @@ func TestRollupL1UserTxERC20CreateAccountDeposit(t *testing.T) {
 		FromIdx:    common.Idx(fromIdxInt64),
 		ToIdx:      common.Idx(toIdxInt64),
 		LoadAmount: big.NewInt(10),
-		TokenID:    common.TokenID(tokenIDERC20),
+		TokenID:    common.TokenID(tokenHEZID),
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC20, toIdxInt64)
+	_, err = rollupClientAux2.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenHEZID, toIdxInt64)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -279,11 +252,11 @@ func TestRollupL1UserTxERC20CreateAccountDeposit(t *testing.T) {
 	assert.Equal(t, l1Tx.LoadAmount, rollupEvents.L1UserTx[0].L1UserTx.LoadAmount)
 	assert.Equal(t, l1Tx.TokenID, rollupEvents.L1UserTx[0].L1UserTx.TokenID)
 	assert.Equal(t, l1Tx.Amount, rollupEvents.L1UserTx[0].L1UserTx.Amount)
-	assert.Equal(t, rollupClientAux.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
+	assert.Equal(t, rollupClientAux2.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
 }

-func TestRollupL1UserTxERC777CreateAccountDeposit(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+func TestRollupL1UserTxERC20PermitCreateAccountDeposit(t *testing.T) {
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(3)
 	fromIdxInt64 := int64(0)
@@ -297,7 +270,7 @@ func TestRollupL1UserTxERC777CreateAccountDeposit(t *testing.T) {
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC777(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64)
+	_, err = rollupClientAux.RollupL1UserTxERC20Permit(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64, deadline)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -311,7 +284,7 @@ func TestRollupL1UserTxERC777CreateAccountDeposit(t *testing.T) {
 }

 func TestRollupL1UserTxETHDeposit(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(2)
 	fromIdxInt64 := int64(0)
@@ -340,7 +313,7 @@ func TestRollupL1UserTxETHDeposit(t *testing.T) {
 }

 func TestRollupL1UserTxERC20Deposit(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux2, err := NewRollupClient(ethereumClientAux2, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(1)
 	fromIdxInt64 := int64(0)
@@ -350,11 +323,11 @@ func TestRollupL1UserTxERC20Deposit(t *testing.T) {
 		FromIdx:    common.Idx(fromIdxInt64),
 		ToIdx:      common.Idx(toIdxInt64),
 		LoadAmount: big.NewInt(10),
-		TokenID:    common.TokenID(tokenIDERC20),
+		TokenID:    common.TokenID(tokenHEZID),
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC20, toIdxInt64)
+	_, err = rollupClientAux2.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenHEZID, toIdxInt64)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -364,11 +337,11 @@ func TestRollupL1UserTxERC20Deposit(t *testing.T) {
 	assert.Equal(t, l1Tx.LoadAmount, rollupEvents.L1UserTx[0].L1UserTx.LoadAmount)
 	assert.Equal(t, l1Tx.TokenID, rollupEvents.L1UserTx[0].L1UserTx.TokenID)
 	assert.Equal(t, l1Tx.Amount, rollupEvents.L1UserTx[0].L1UserTx.Amount)
-	assert.Equal(t, rollupClientAux.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
+	assert.Equal(t, rollupClientAux2.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
 }

-func TestRollupL1UserTxERC777Deposit(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+func TestRollupL1UserTxERC20PermitDeposit(t *testing.T) {
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(3)
 	fromIdxInt64 := int64(0)
@@ -382,7 +355,7 @@ func TestRollupL1UserTxERC777Deposit(t *testing.T) {
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC777(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64)
+	_, err = rollupClientAux.RollupL1UserTxERC20Permit(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64, deadline)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -396,7 +369,7 @@ func TestRollupL1UserTxERC777Deposit(t *testing.T) {
 }

 func TestRollupL1UserTxETHDepositTransfer(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(2)
 	fromIdxInt64 := int64(0)
@@ -425,7 +398,7 @@ func TestRollupL1UserTxETHDepositTransfer(t *testing.T) {
 }

 func TestRollupL1UserTxERC20DepositTransfer(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux2, err := NewRollupClient(ethereumClientAux2, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(1)
 	fromIdxInt64 := int64(0)
@@ -435,11 +408,11 @@ func TestRollupL1UserTxERC20DepositTransfer(t *testing.T) {
 		FromIdx:    common.Idx(fromIdxInt64),
 		ToIdx:      common.Idx(toIdxInt64),
 		LoadAmount: big.NewInt(10),
-		TokenID:    common.TokenID(tokenIDERC20),
+		TokenID:    common.TokenID(tokenHEZID),
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC20, toIdxInt64)
+	_, err = rollupClientAux2.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenHEZID, toIdxInt64)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -449,11 +422,11 @@ func TestRollupL1UserTxERC20DepositTransfer(t *testing.T) {
 	assert.Equal(t, l1Tx.LoadAmount, rollupEvents.L1UserTx[0].L1UserTx.LoadAmount)
 	assert.Equal(t, l1Tx.TokenID, rollupEvents.L1UserTx[0].L1UserTx.TokenID)
 	assert.Equal(t, l1Tx.Amount, rollupEvents.L1UserTx[0].L1UserTx.Amount)
-	assert.Equal(t, rollupClientAux.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
+	assert.Equal(t, rollupClientAux2.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
 }

-func TestRollupL1UserTxERC777DepositTransfer(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+func TestRollupL1UserTxERC20PermitDepositTransfer(t *testing.T) {
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(3)
 	fromIdxInt64 := int64(0)
@@ -467,7 +440,7 @@ func TestRollupL1UserTxERC777DepositTransfer(t *testing.T) {
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC777(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64)
+	_, err = rollupClientAux.RollupL1UserTxERC20Permit(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64, deadline)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -481,7 +454,7 @@ func TestRollupL1UserTxERC777DepositTransfer(t *testing.T) {
 }

 func TestRollupL1UserTxETHCreateAccountDepositTransfer(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(2)
 	fromIdxInt64 := int64(0)
@@ -510,7 +483,7 @@ func TestRollupL1UserTxETHCreateAccountDepositTransfer(t *testing.T) {
 }

 func TestRollupL1UserTxERC20CreateAccountDepositTransfer(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux2, err := NewRollupClient(ethereumClientAux2, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(1)
 	fromIdxInt64 := int64(0)
@@ -520,11 +493,11 @@ func TestRollupL1UserTxERC20CreateAccountDepositTransfer(t *testing.T) {
 		FromIdx:    common.Idx(fromIdxInt64),
 		ToIdx:      common.Idx(toIdxInt64),
 		LoadAmount: big.NewInt(10),
-		TokenID:    common.TokenID(tokenIDERC20),
+		TokenID:    common.TokenID(tokenHEZID),
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC20, toIdxInt64)
+	_, err = rollupClientAux2.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenHEZID, toIdxInt64)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -534,11 +507,11 @@ func TestRollupL1UserTxERC20CreateAccountDepositTransfer(t *testing.T) {
 	assert.Equal(t, l1Tx.LoadAmount, rollupEvents.L1UserTx[0].L1UserTx.LoadAmount)
 	assert.Equal(t, l1Tx.TokenID, rollupEvents.L1UserTx[0].L1UserTx.TokenID)
 	assert.Equal(t, l1Tx.Amount, rollupEvents.L1UserTx[0].L1UserTx.Amount)
-	assert.Equal(t, rollupClientAux.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
+	assert.Equal(t, rollupClientAux2.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
 }

-func TestRollupL1UserTxERC777CreateAccountDepositTransfer(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+func TestRollupL1UserTxERC20PermitCreateAccountDepositTransfer(t *testing.T) {
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(3)
 	fromIdxInt64 := int64(0)
@@ -552,7 +525,7 @@ func TestRollupL1UserTxERC777CreateAccountDepositTransfer(t *testing.T) {
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC777(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64)
+	_, err = rollupClientAux.RollupL1UserTxERC20Permit(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64, deadline)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -566,7 +539,7 @@ func TestRollupL1UserTxERC777CreateAccountDepositTransfer(t *testing.T) {
 }

 func TestRollupL1UserTxETHForceTransfer(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(2)
 	fromIdxInt64 := int64(0)
@@ -595,7 +568,7 @@ func TestRollupL1UserTxETHForceTransfer(t *testing.T) {
 }

 func TestRollupL1UserTxERC20ForceTransfer(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux2, err := NewRollupClient(ethereumClientAux2, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(1)
 	fromIdxInt64 := int64(0)
@@ -605,11 +578,11 @@ func TestRollupL1UserTxERC20ForceTransfer(t *testing.T) {
 		FromIdx:    common.Idx(fromIdxInt64),
 		ToIdx:      common.Idx(toIdxInt64),
 		LoadAmount: big.NewInt(10),
-		TokenID:    common.TokenID(tokenIDERC20),
+		TokenID:    common.TokenID(tokenHEZID),
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC20, toIdxInt64)
+	_, err = rollupClientAux2.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenHEZID, toIdxInt64)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -619,11 +592,11 @@ func TestRollupL1UserTxERC20ForceTransfer(t *testing.T) {
 	assert.Equal(t, l1Tx.LoadAmount, rollupEvents.L1UserTx[0].L1UserTx.LoadAmount)
 	assert.Equal(t, l1Tx.TokenID, rollupEvents.L1UserTx[0].L1UserTx.TokenID)
 	assert.Equal(t, l1Tx.Amount, rollupEvents.L1UserTx[0].L1UserTx.Amount)
-	assert.Equal(t, rollupClientAux.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
+	assert.Equal(t, rollupClientAux2.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
 }

-func TestRollupL1UserTxERC777ForceTransfer(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+func TestRollupL1UserTxERC20PermitForceTransfer(t *testing.T) {
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(3)
 	fromIdxInt64 := int64(0)
@@ -637,7 +610,7 @@ func TestRollupL1UserTxERC777ForceTransfer(t *testing.T) {
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC777(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64)
+	_, err = rollupClientAux.RollupL1UserTxERC20Permit(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64, deadline)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -651,7 +624,7 @@ func TestRollupL1UserTxERC777ForceTransfer(t *testing.T) {
 }

 func TestRollupL1UserTxETHForceExit(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(2)
 	fromIdxInt64 := int64(0)
@@ -680,7 +653,7 @@ func TestRollupL1UserTxETHForceExit(t *testing.T) {
 }

 func TestRollupL1UserTxERC20ForceExit(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux2, err := NewRollupClient(ethereumClientAux2, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(1)
 	fromIdxInt64 := int64(0)
@@ -690,11 +663,11 @@ func TestRollupL1UserTxERC20ForceExit(t *testing.T) {
 		FromIdx:    common.Idx(fromIdxInt64),
 		ToIdx:      common.Idx(toIdxInt64),
 		LoadAmount: big.NewInt(10),
-		TokenID:    common.TokenID(tokenIDERC20),
+		TokenID:    common.TokenID(tokenHEZID),
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC20, toIdxInt64)
+	_, err = rollupClientAux2.RollupL1UserTxERC20ETH(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenHEZID, toIdxInt64)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -704,11 +677,11 @@ func TestRollupL1UserTxERC20ForceExit(t *testing.T) {
 	assert.Equal(t, l1Tx.LoadAmount, rollupEvents.L1UserTx[0].L1UserTx.LoadAmount)
 	assert.Equal(t, l1Tx.TokenID, rollupEvents.L1UserTx[0].L1UserTx.TokenID)
 	assert.Equal(t, l1Tx.Amount, rollupEvents.L1UserTx[0].L1UserTx.Amount)
-	assert.Equal(t, rollupClientAux.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
+	assert.Equal(t, rollupClientAux2.client.account.Address, rollupEvents.L1UserTx[0].L1UserTx.FromEthAddr)
 }

-func TestRollupL1UserTxERC777ForceExit(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+func TestRollupL1UserTxERC20PermitForceExit(t *testing.T) {
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)
 	key := genKeysBjj(3)
 	fromIdxInt64 := int64(0)
@@ -724,7 +697,7 @@ func TestRollupL1UserTxERC777ForceExit(t *testing.T) {
 		Amount:     big.NewInt(0),
 	}

-	_, err = rollupClientAux.RollupL1UserTxERC777(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64)
+	_, err = rollupClientAux.RollupL1UserTxERC20Permit(l1Tx.FromBJJ, fromIdxInt64, l1Tx.LoadAmount, l1Tx.Amount, tokenIDERC777, toIdxInt64, deadline)
 	require.Nil(t, err)

 	currentBlockNum, _ := rollupClient.client.EthCurrentBlock()
@@ -783,7 +756,7 @@ func TestRollupForgeBatch2(t *testing.T) {
 }

 func TestRollupWithdrawMerkleProof(t *testing.T) {
-	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZAddressConst)
+	rollupClientAux, err := NewRollupClient(ethereumClientAux, hermezRollupAddressConst, tokenHEZ)
 	require.Nil(t, err)

 	var pkComp babyjub.PublicKeyComp
--- a/eth/wdelayer_test.go
+++ b/eth/wdelayer_test.go
@@ -117,19 +117,19 @@ func TestWDelayerDeposit(t *testing.T) {
 	amount.SetString("1100000000000000000", 10)
 	wdelayerClientHermez, err := NewWDelayerClient(ethereumClientHermez, wdelayerTestAddressConst)
 	require.Nil(t, err)
-	_, err = wdelayerClientHermez.WDelayerDeposit(auxAddressConst, tokenERC20AddressConst, amount)
+	_, err = wdelayerClientHermez.WDelayerDeposit(auxAddressConst, tokenHEZAddressConst, amount)
 	require.Nil(t, err)
 	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, amount, wdelayerEvents.Deposit[0].Amount)
 	assert.Equal(t, auxAddressConst, wdelayerEvents.Deposit[0].Owner)
-	assert.Equal(t, tokenERC20AddressConst, wdelayerEvents.Deposit[0].Token)
+	assert.Equal(t, tokenHEZAddressConst, wdelayerEvents.Deposit[0].Token)
 }

 func TestWDelayerDepositInfo(t *testing.T) {
 	amount := new(big.Int)
 	amount.SetString("1100000000000000000", 10)
-	state, err := wdelayerClientTest.WDelayerDepositInfo(auxAddressConst, tokenERC20AddressConst)
+	state, err := wdelayerClientTest.WDelayerDepositInfo(auxAddressConst, tokenHEZAddressConst)
 	require.Nil(t, err)
 	assert.Equal(t, state.Amount, amount)
 }
@@ -137,16 +137,16 @@ func TestWDelayerDepositInfo(t *testing.T) {
 func TestWDelayerWithdrawal(t *testing.T) {
 	amount := new(big.Int)
 	amount.SetString("1100000000000000000", 10)
-	_, err := wdelayerClientTest.WDelayerWithdrawal(auxAddressConst, tokenERC20AddressConst)
-	require.Contains(t, err.Error(), "Withdrawal not allowed yet")
+	_, err := wdelayerClientTest.WDelayerWithdrawal(auxAddressConst, tokenHEZAddressConst)
+	require.Contains(t, err.Error(), "WITHDRAWAL_NOT_ALLOWED")
 	addBlocks(newWithdrawalDelay.Int64(), ethClientDialURL)
-	_, err = wdelayerClientTest.WDelayerWithdrawal(auxAddressConst, tokenERC20AddressConst)
+	_, err = wdelayerClientTest.WDelayerWithdrawal(auxAddressConst, tokenHEZAddressConst)
 	require.Nil(t, err)
 	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, amount, wdelayerEvents.Withdraw[0].Amount)
 	assert.Equal(t, auxAddressConst, wdelayerEvents.Withdraw[0].Owner)
-	assert.Equal(t, tokenERC20AddressConst, wdelayerEvents.Withdraw[0].Token)
+	assert.Equal(t, tokenHEZAddressConst, wdelayerEvents.Withdraw[0].Token)
 }

 func TestWDelayerSecondDeposit(t *testing.T) {
@@ -154,13 +154,13 @@ func TestWDelayerSecondDeposit(t *testing.T) {
 	amount.SetString("1100000000000000000", 10)
 	wdelayerClientHermez, err := NewWDelayerClient(ethereumClientHermez, wdelayerTestAddressConst)
 	require.Nil(t, err)
-	_, err = wdelayerClientHermez.WDelayerDeposit(auxAddressConst, tokenERC20AddressConst, amount)
+	_, err = wdelayerClientHermez.WDelayerDeposit(auxAddressConst, tokenHEZAddressConst, amount)
 	require.Nil(t, err)
 	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, amount, wdelayerEvents.Deposit[0].Amount)
 	assert.Equal(t, auxAddressConst, wdelayerEvents.Deposit[0].Owner)
-	assert.Equal(t, tokenERC20AddressConst, wdelayerEvents.Deposit[0].Token)
+	assert.Equal(t, tokenHEZAddressConst, wdelayerEvents.Deposit[0].Token)
 }

 func TestWDelayerEnableEmergencyMode(t *testing.T) {
@@ -192,15 +192,15 @@ func TestWDelayerEscapeHatchWithdrawal(t *testing.T) {
 	amount.SetString("10000000000000000", 10)
 	wdelayerClientWhite, err := NewWDelayerClient(ethereumClientWhite, wdelayerTestAddressConst)
 	require.Nil(t, err)
-	_, err = wdelayerClientWhite.WDelayerEscapeHatchWithdrawal(governanceAddressConst, tokenERC20AddressConst, amount)
-	require.Contains(t, err.Error(), "NO MAX_EMERGENCY_MODE_TIME")
+	_, err = wdelayerClientWhite.WDelayerEscapeHatchWithdrawal(governanceAddressConst, tokenHEZAddressConst, amount)
+	require.Contains(t, err.Error(), "NO_MAX_EMERGENCY_MODE_TIME")
 	seconds := maxEmergencyModeTime.Seconds()
 	addTime(seconds, ethClientDialURL)
-	_, err = wdelayerClientWhite.WDelayerEscapeHatchWithdrawal(governanceAddressConst, tokenERC20AddressConst, amount)
+	_, err = wdelayerClientWhite.WDelayerEscapeHatchWithdrawal(governanceAddressConst, tokenHEZAddressConst, amount)
 	require.Nil(t, err)
 	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
-	assert.Equal(t, tokenERC20AddressConst, wdelayerEvents.EscapeHatchWithdrawal[0].Token)
+	assert.Equal(t, tokenHEZAddressConst, wdelayerEvents.EscapeHatchWithdrawal[0].Token)
 	assert.Equal(t, governanceAddressConst, wdelayerEvents.EscapeHatchWithdrawal[0].To)
 	assert.Equal(t, whiteHackGroupAddressConst, wdelayerEvents.EscapeHatchWithdrawal[0].Who)
 	assert.Equal(t, amount, wdelayerEvents.EscapeHatchWithdrawal[0].Amount)
--- a/go.mod
+++ b/go.mod
@@ -16,6 +16,7 @@ require (
 	github.com/iden3/go-merkletree v0.0.0-20200902123354-eeb949f8c334
 	github.com/jinzhu/copier v0.0.0-20190924061706-b57f9002281a
 	github.com/jmoiron/sqlx v1.2.0
+	github.com/joho/godotenv v1.3.0
 	github.com/lib/pq v1.8.0
 	github.com/mattn/go-sqlite3 v2.0.3+incompatible
 	github.com/mitchellh/copystructure v1.0.0
--- a/go.sum
+++ b/go.sum
@@ -324,6 +324,7 @@ github.com/jinzhu/copier v0.0.0-20190924061706-b57f9002281a/go.mod h1:yL958EeXv8
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
 github.com/jmoiron/sqlx v1.2.0 h1:41Ip0zITnmWNR/vHV+S4m+VoUivnWY5E4OJfLZjCJMA=
 github.com/jmoiron/sqlx v1.2.0/go.mod h1:1FEQNm3xlJgrMD+FBdI9+xvCksHtbpVBBw5dYhBSsks=
+github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
 github.com/joho/godotenv v1.3.0/go.mod h1:7hK45KPybAkOC6peb+G5yklZfMxEjkZhHbwpqxOKXbg=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/jrick/logrotate v1.0.0/go.mod h1:LNinyqDIJnpAur+b8yyulnQw/wDuN1+BYKlTRt3OuAQ=
--- a/node/node.go
+++ b/node/node.go
@@ -96,8 +96,11 @@ func NewNode(mode Mode, cfg *config.Node, coordCfg *config.Coordinator) (*Node,
 			Address: cfg.SmartContracts.Rollup,
 		},
 		Auction: eth.AuctionConfig{
-			Address:         cfg.SmartContracts.Auction,
-			TokenHEZAddress: cfg.SmartContracts.TokenHEZ,
+			Address: cfg.SmartContracts.Auction,
+			TokenHEZ: eth.TokenConfig{
+				Address: cfg.SmartContracts.TokenHEZ,
+				Name:    cfg.SmartContracts.TokenHEZName,
+			},
 		},
 	})
 	if err != nil {
--- a/synchronizer/synchronizer_test.go
+++ b/synchronizer/synchronizer_test.go
@@ -146,7 +146,7 @@ func TestSync(t *testing.T) {
 	// Add tokens to ethereum, and to rollup
 	for _, token := range tokens {
 		client.CtlAddERC20(token.Addr, token.Consts)
-		_, err := client.RollupAddToken(token.Addr, clientSetup.RollupVariables.FeeAddToken)
+		_, err := client.RollupAddTokenSimple(token.Addr, clientSetup.RollupVariables.FeeAddToken)
 		require.Nil(t, err)
 	}

--- a/test/ethclient.go
+++ b/test/ethclient.go
@@ -621,6 +621,12 @@ 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
+}
+
 // RollupL1UserTxERC20ETH sends an L1UserTx to the Rollup.
 func (c *Client) RollupL1UserTxERC20ETH(
 	fromBJJ *babyjub.PublicKey,
@@ -683,10 +689,10 @@ func (c *Client) RollupL1UserTxERC20ETH(
 }

 // RollupL1UserTxERC777 is the interface to call the smart contract function
-func (c *Client) RollupL1UserTxERC777(fromBJJ *babyjub.PublicKey, fromIdx int64, loadAmount *big.Int, amount *big.Int, tokenID uint32, toIdx int64) (*types.Transaction, error) {
-	log.Error("TODO")
-	return nil, errTODO
-}
+// func (c *Client) RollupL1UserTxERC777(fromBJJ *babyjub.PublicKey, fromIdx int64, loadAmount *big.Int, amount *big.Int, tokenID uint32, toIdx int64) (*types.Transaction, error) {
+// 	log.Error("TODO")
+// 	return nil, errTODO
+// }

 // RollupRegisterTokensCount is the interface to call the smart contract function
 func (c *Client) RollupRegisterTokensCount() (*big.Int, error) {
@@ -790,8 +796,15 @@ func (c *Client) addBatch(args *eth.RollupForgeBatchArgs) (*types.Transaction, e
 	return ethTx, nil
 }

+// RollupAddTokenSimple is a wrapper around RollupAddToken that automatically
+// sets `deadlie`.
+func (c *Client) RollupAddTokenSimple(tokenAddress ethCommon.Address, feeAddToken *big.Int) (tx *types.Transaction, err error) {
+	return c.RollupAddToken(tokenAddress, feeAddToken, big.NewInt(9999)) //nolint:gomnd
+}
+
 // RollupAddToken is the interface to call the smart contract function
-func (c *Client) RollupAddToken(tokenAddress ethCommon.Address, feeAddToken *big.Int) (tx *types.Transaction, err error) {
+func (c *Client) RollupAddToken(tokenAddress ethCommon.Address, feeAddToken *big.Int,
+	deadline *big.Int) (tx *types.Transaction, err error) {
 	c.rw.Lock()
 	defer c.rw.Unlock()
 	cpy := c.nextBlock().copy()
@@ -1190,8 +1203,15 @@ func (c *Client) AuctionGetSlotSet(slot int64) (*big.Int, error) {
 // 	return errTODO
 // }

-// AuctionBid is the interface to call the smart contract function
-func (c *Client) AuctionBid(slot int64, bidAmount *big.Int) (tx *types.Transaction, err error) {
+// AuctionBidSimple is a wrapper around AuctionBid that automatically sets `amount` and `deadline`.
+func (c *Client) AuctionBidSimple(slot int64, bidAmount *big.Int) (tx *types.Transaction, err error) {
+	return c.AuctionBid(bidAmount, slot, bidAmount, big.NewInt(99999)) //nolint:gomnd
+}
+
+// AuctionBid is the interface to call the smart contract function.  This
+// implementation behaves as if any address has infinite tokens.
+func (c *Client) AuctionBid(amount *big.Int, slot int64, bidAmount *big.Int,
+	deadline *big.Int) (tx *types.Transaction, err error) {
 	c.rw.Lock()
 	defer c.rw.Unlock()
 	cpy := c.nextBlock().copy()
@@ -1242,8 +1262,10 @@ func (c *Client) AuctionBid(slot int64, bidAmount *big.Int) (tx *types.Transacti
 	return a.addTransaction(newTransaction("bid", data{slot, bidAmount, *c.addr})), nil
 }

-// AuctionMultiBid is the interface to call the smart contract function
-func (c *Client) AuctionMultiBid(startingSlot int64, endingSlot int64, slotSet [6]bool, maxBid, closedMinBid, budget *big.Int) (tx *types.Transaction, err error) {
+// AuctionMultiBid is the interface to call the smart contract function.  This
+// implementation behaves as if any address has infinite tokens.
+func (c *Client) AuctionMultiBid(amount *big.Int, startingSlot int64, endingSlot int64, slotSet [6]bool,
+	maxBid, closedMinBid, deadline *big.Int) (tx *types.Transaction, err error) {
 	c.rw.Lock()
 	defer c.rw.Unlock()
 	cpy := c.nextBlock().copy()
--- a/test/ethclient_test.go
+++ b/test/ethclient_test.go
@@ -94,34 +94,34 @@ func TestClientAuction(t *testing.T) {

 	// Check several cases in which bid doesn't succed, and also do 2 successful bids.

-	_, err := c.AuctionBid(0, big.NewInt(1))
+	_, err := c.AuctionBidSimple(0, big.NewInt(1))
 	assert.Equal(t, errBidClosed, err)

-	_, err = c.AuctionBid(4322, big.NewInt(1))
+	_, err = c.AuctionBidSimple(4322, big.NewInt(1))
 	assert.Equal(t, errBidNotOpen, err)

 	// 101 % 6 = 5;  defaultSlotSetBid[5] = 1500;  1500 + 10% = 1650
-	_, err = c.AuctionBid(101, big.NewInt(1650))
+	_, err = c.AuctionBidSimple(101, big.NewInt(1650))
 	assert.Equal(t, errCoordNotReg, err)

 	_, err = c.AuctionSetCoordinator(addrForge, "https://foo.bar")
 	assert.Nil(t, err)

-	_, err = c.AuctionBid(3, big.NewInt(1))
+	_, err = c.AuctionBidSimple(3, big.NewInt(1))
 	assert.Equal(t, errBidBelowMin, err)

-	_, err = c.AuctionBid(3, big.NewInt(1650))
+	_, err = c.AuctionBidSimple(3, big.NewInt(1650))
 	assert.Nil(t, err)

 	c.CtlSetAddr(addrBidder2)
 	_, err = c.AuctionSetCoordinator(addrForge2, "https://foo2.bar")
 	assert.Nil(t, err)

-	_, err = c.AuctionBid(3, big.NewInt(16))
+	_, err = c.AuctionBidSimple(3, big.NewInt(16))
 	assert.Equal(t, errBidBelowMin, err)

 	// 1650 + 10% = 1815
-	_, err = c.AuctionBid(3, big.NewInt(1815))
+	_, err = c.AuctionBidSimple(3, big.NewInt(1815))
 	assert.Nil(t, err)

 	c.CtlMineBlock()
@@ -143,7 +143,7 @@ func TestClientRollup(t *testing.T) {

 	// Add a token

-	tx, err := c.RollupAddToken(token1Addr, clientSetup.RollupVariables.FeeAddToken)
+	tx, err := c.RollupAddTokenSimple(token1Addr, clientSetup.RollupVariables.FeeAddToken)
 	require.Nil(t, err)
 	assert.NotNil(t, tx)