@@ -243,8 +243,8 @@
 	// Bidding
 	// AuctionTokensReceived(operator, from, to ethCommon.Address, amount *big.Int,
 	// 	userData, operatorData []byte) error // Only called from another smart contract
-	AuctionBid(slot int64, bidAmount *big.Int, forger, tokenAddress ethCommon.Address) (*types.Transaction, error)
-	AuctionMultiBid(startingSlot int64, endingSlot int64, slotSet [6]bool, maxBid, closedMinBid, budget *big.Int, forger, tokenAddress ethCommon.Address) (*types.Transaction, error)
+	AuctionBid(slot int64, bidAmount *big.Int, forger ethCommon.Address) (*types.Transaction, error)
+	AuctionMultiBid(startingSlot int64, endingSlot int64, slotSet [6]bool, maxBid, closedMinBid, budget *big.Int, forger ethCommon.Address) (*types.Transaction, error)
 
 	// Forge
 	AuctionCanForge(forger ethCommon.Address, blockNum int64) (bool, error)
@@ -267,17 +267,19 @@ //
 
 // AuctionClient is the implementation of the interface to the Auction Smart Contract in ethereum.
 type AuctionClient struct {
-	client   *EthereumClient
-	address  ethCommon.Address
-	gasLimit uint64
+	client       *EthereumClient
+	address      ethCommon.Address
+	tokenAddress ethCommon.Address
+	gasLimit     uint64
 }
 
-// NewAuctionClient creates a new AuctionClient
-func NewAuctionClient(client *EthereumClient, address ethCommon.Address) *AuctionClient {
+// NewAuctionClient creates a new AuctionClient.  `tokenAddress` is the address of the HEZ tokens.
+func NewAuctionClient(client *EthereumClient, address, tokenAddress ethCommon.Address) *AuctionClient {
 	return &AuctionClient{
-		client:   client,
-		address:  address,
-		gasLimit: 1000000, //nolint:gomnd
+		client:       client,
+		address:      address,
+		tokenAddress: tokenAddress,
+		gasLimit:     1000000, //nolint:gomnd
 	}
 }
 
@@ -689,13 +691,13 @@ // 	return errTODO
 // }
 
 // AuctionBid is the interface to call the smart contract function
-func (c *AuctionClient) AuctionBid(slot int64, bidAmount *big.Int, forger, tokenAddress ethCommon.Address) (*types.Transaction, error) {
+func (c *AuctionClient) AuctionBid(slot int64, bidAmount *big.Int, forger ethCommon.Address) (*types.Transaction, error) {
 	var tx *types.Transaction
 	var err error
 	if tx, err = c.client.CallAuth(
 		c.gasLimit,
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
-			tokens, err := ERC777.NewERC777(tokenAddress, ec)
+			tokens, err := ERC777.NewERC777(c.tokenAddress, ec)
 			if err != nil {
 				return nil, err
 			}
@@ -725,13 +727,13 @@ return tx, nil
 }
 
 // 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, forger, tokenAddress ethCommon.Address) (*types.Transaction, error) {
+func (c *AuctionClient) AuctionMultiBid(startingSlot int64, endingSlot int64, slotSet [6]bool, maxBid, closedMinBid, budget *big.Int, forger ethCommon.Address) (*types.Transaction, error) {
 	var tx *types.Transaction
 	var err error
 	if tx, err = c.client.CallAuth(
 		c.gasLimit,
 		func(ec *ethclient.Client, auth *bind.TransactOpts) (*types.Transaction, error) {
-			tokens, err := ERC777.NewERC777(tokenAddress, ec)
+			tokens, err := ERC777.NewERC777(c.tokenAddress, ec)
 			if err != nil {
 				return nil, err
 			}

@@ -68,8 +68,9 @@ ethClient, err := ethclient.Dial(ehtClientDialURL)
 	require.Nil(t, err)
 	ethereumClient := NewEthereumClient(ethClient, &account, ks, nil)
 	auctionAddress := common.HexToAddress(auctionAddressStr)
+	tokenAddress := common.HexToAddress(tokenHezStr)
 	if integration != "" {
-		auctionClient = NewAuctionClient(ethereumClient, auctionAddress)
+		auctionClient = NewAuctionClient(ethereumClient, auctionAddress, tokenAddress)
 	}
 }
 
@@ -351,7 +352,7 @@ require.Nil(t, err)
 		bidAmount := new(big.Int)
 		bidAmount.SetString("11000000000000000000", 10)
 		forgerAddress := common.HexToAddress(governanceAddressStr)
-		_, err = auctionClient.AuctionBid(currentSlot+4, bidAmount, forgerAddress, TOKENHEZ)
+		_, err = auctionClient.AuctionBid(currentSlot+4, bidAmount, forgerAddress)
 		require.Nil(t, err)
 	}
 }
@@ -368,7 +369,7 @@ minBid.SetString("11000000000000000000", 10)
 		budget := new(big.Int)
 		budget.SetString("110000000000000000000", 10)
 		forgerAddress := common.HexToAddress(governanceAddressStr)
-		_, err = auctionClient.AuctionMultiBid(currentSlot+5, currentSlot+10, slotSet, maxBid, minBid, budget, forgerAddress, TOKENHEZ)
+		_, err = auctionClient.AuctionMultiBid(currentSlot+5, currentSlot+10, slotSet, maxBid, minBid, budget, forgerAddress)
 		require.Nil(t, err)
 	}
 }

@@ -22,5 +22,6 @@ github.com/urfave/cli v1.22.1
 	github.com/urfave/cli/v2 v2.2.0
 	go.uber.org/multierr v1.6.0 // indirect
 	go.uber.org/zap v1.16.0
+	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
 	gopkg.in/go-playground/validator.v9 v9.29.1
 )

@@ -1068,7 +1068,7 @@ // 	return errTODO
 // }
 
 // AuctionBid is the interface to call the smart contract function
-func (c *Client) AuctionBid(slot int64, bidAmount *big.Int, forger, tokenAddress ethCommon.Address) (tx *types.Transaction, err error) {
+func (c *Client) AuctionBid(slot int64, bidAmount *big.Int, forger ethCommon.Address) (tx *types.Transaction, err error) {
 	c.rw.Lock()
 	defer c.rw.Unlock()
 	cpy := c.nextBlock().copy()
@@ -1117,7 +1117,7 @@ return c.newTransaction("bid", data{slot, bidAmount, forger}), 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, forger, tokenAddress ethCommon.Address) (tx *types.Transaction, err error) {
+func (c *Client) AuctionMultiBid(startingSlot int64, endingSlot int64, slotSet [6]bool, maxBid, closedMinBid, budget *big.Int, forger ethCommon.Address) (tx *types.Transaction, err error) {
 	c.rw.Lock()
 	defer c.rw.Unlock()
 	cpy := c.nextBlock().copy()

@@ -68,7 +68,6 @@ func TestClientAuction(t *testing.T) {
 	addrWithdraw := ethCommon.HexToAddress("0x6b175474e89094c44da98b954eedeac495271d0f")
 	addrForge := ethCommon.HexToAddress("0xCfAA413eEb796f328620a3630Ae39124cabcEa92")
 	addrForge2 := ethCommon.HexToAddress("0x1fCb4ac309428feCc61B1C8cA5823C15A5e1a800")
-	token1Addr := ethCommon.HexToAddress("0x6b175474e89094c44da98b954eedeac495271d0f")
 
 	var timer timer
 	clientSetup := NewClientSetupExample()
@@ -81,33 +80,33 @@ c := NewClient(true, &timer, addrWithdraw, clientSetup)
 
 	// Check several cases in which bid doesn't succed, and also do 2 successful bids.
 
-	_, err := c.AuctionBid(0, big.NewInt(1), addrForge, token1Addr)
+	_, err := c.AuctionBid(0, big.NewInt(1), addrForge)
 	assert.Equal(t, errBidClosed, err)
 
-	_, err = c.AuctionBid(4322, big.NewInt(1), addrForge, token1Addr)
+	_, err = c.AuctionBid(4322, big.NewInt(1), addrForge)
 	assert.Equal(t, errBidNotOpen, err)
 
 	// 101 % 6 = 5;  defaultSlotSetBid[5] = 1500;  1500 + 10% = 1650
-	_, err = c.AuctionBid(101, big.NewInt(1650), addrForge, token1Addr)
+	_, err = c.AuctionBid(101, big.NewInt(1650), addrForge)
 	assert.Equal(t, errCoordNotReg, err)
 
 	_, err = c.AuctionRegisterCoordinator(addrForge, "https://foo.bar")
 	assert.Nil(t, err)
 
-	_, err = c.AuctionBid(3, big.NewInt(1), addrForge, token1Addr)
+	_, err = c.AuctionBid(3, big.NewInt(1), addrForge)
 	assert.Equal(t, errBidBelowMin, err)
 
-	_, err = c.AuctionBid(3, big.NewInt(1650), addrForge, token1Addr)
+	_, err = c.AuctionBid(3, big.NewInt(1650), addrForge)
 	assert.Nil(t, err)
 
 	_, err = c.AuctionRegisterCoordinator(addrForge2, "https://foo2.bar")
 	assert.Nil(t, err)
 
-	_, err = c.AuctionBid(3, big.NewInt(16), addrForge2, token1Addr)
+	_, err = c.AuctionBid(3, big.NewInt(16), addrForge2)
 	assert.Equal(t, errBidBelowMin, err)
 
 	// 1650 + 10% = 1815
-	_, err = c.AuctionBid(3, big.NewInt(1815), addrForge2, token1Addr)
+	_, err = c.AuctionBid(3, big.NewInt(1815), addrForge2)
 	assert.Nil(t, err)
 
 	c.CtlMineBlock()