client, common, container, k8s: make client.Client as interface type

client/api.go

@@ -0,0 +1,71 @@
+// Copyright 2017 AMIS Technologies
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package client
+
+import (
+	"context"
+	"math/big"
+
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/p2p"
+)
+
+type Client interface {
+	Close()
+	AddPeer(ctx context.Context, nodeURL string) error
+	AdminPeers(ctx context.Context) ([]*p2p.PeerInfo, error)
+	NodeInfo(ctx context.Context) (*p2p.PeerInfo, error)
+	BlockNumber(ctx context.Context) (*big.Int, error)
+	StartMining(ctx context.Context) error
+	StopMining(ctx context.Context) error
+	SendTransaction(ctx context.Context, from, to common.Address, value *big.Int) (string, error)
+	CreateContract(ctx context.Context, from common.Address, bytecode string, gas *big.Int) (string, error)
+	CreatePrivateContract(ctx context.Context, from common.Address, bytecode string, gas *big.Int, privateFor []string) (string, error)
+	ProposeValidator(ctx context.Context, address common.Address, auth bool) error
+	GetValidators(ctx context.Context, blockNumbers *big.Int) ([]common.Address, error)
+
+	// eth client
+	BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error)
+	BlockByNumber(ctx context.Context, number *big.Int) (*types.Block, error)
+	HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error)
+	HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error)
+	TransactionByHash(ctx context.Context, hash common.Hash) (*types.Transaction, bool, error)
+	TransactionCount(ctx context.Context, blockHash common.Hash) (uint, error)
+	TransactionInBlock(ctx context.Context, blockHash common.Hash, index uint) (*types.Transaction, error)
+	TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error)
+	SyncProgress(ctx context.Context) (*ethereum.SyncProgress, error)
+	SubscribeNewHead(ctx context.Context, ch chan<- *types.Header) (ethereum.Subscription, error)
+	NetworkID(ctx context.Context) (*big.Int, error)
+	BalanceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (*big.Int, error)
+	StorageAt(ctx context.Context, account common.Address, key common.Hash, blockNumber *big.Int) ([]byte, error)
+	CodeAt(ctx context.Context, account common.Address, blockNumber *big.Int) ([]byte, error)
+	NonceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (uint64, error)
+	FilterLogs(ctx context.Context, q ethereum.FilterQuery) ([]types.Log, error)
+	SubscribeFilterLogs(ctx context.Context, q ethereum.FilterQuery, ch chan<- types.Log) (ethereum.Subscription, error)
+	PendingBalanceAt(ctx context.Context, account common.Address) (*big.Int, error)
+	PendingStorageAt(ctx context.Context, account common.Address, key common.Hash) ([]byte, error)
+	PendingCodeAt(ctx context.Context, account common.Address) ([]byte, error)
+	PendingNonceAt(ctx context.Context, account common.Address) (uint64, error)
+	PendingTransactionCount(ctx context.Context) (uint, error)
+	CallContract(ctx context.Context, msg ethereum.CallMsg, blockNumber *big.Int) ([]byte, error)
+	PendingCallContract(ctx context.Context, msg ethereum.CallMsg) ([]byte, error)
+	SuggestGasPrice(ctx context.Context) (*big.Int, error)
+	EstimateGas(ctx context.Context, msg ethereum.CallMsg) (*big.Int, error)
+	SendRawTransaction(ctx context.Context, tx *types.Transaction) error
+}

client/client.go

@@ -30,29 +30,29 @@ import (
 	"github.com/getamis/go-ethereum/ethclient"
 )
 
-type Client struct {
+type client struct {
 	c         *rpc.Client
 	ethClient *ethclient.Client
 }
 
-func Dial(rawurl string) (*Client, error) {
+func Dial(rawurl string) (Client, error) {
 	c, err := rpc.Dial(rawurl)
 	if err != nil {
 		return nil, err
 	}
-	return &Client{
+	return &client{
 		c:         c,
 		ethClient: ethclient.NewClient(c),
 	}, nil
 }
 
-func (c *Client) Close() {
+func (c *client) Close() {
 	c.c.Close()
 }
 
 // ----------------------------------------------------------------------------
 
-func (ic *Client) AddPeer(ctx context.Context, nodeURL string) error {
+func (ic *client) AddPeer(ctx context.Context, nodeURL string) error {
 	var r bool
 	// TODO: Result needs to be verified
 	// The response data type are bytes, but we cannot parse...
@@ -63,7 +63,7 @@ func (ic *Client) AddPeer(ctx context.Context, nodeURL string) error {
 	return err
 }
 
-func (ic *Client) AdminPeers(ctx context.Context) ([]*p2p.PeerInfo, error) {
+func (ic *client) AdminPeers(ctx context.Context) ([]*p2p.PeerInfo, error) {
 	var r []*p2p.PeerInfo
 	// The response data type are bytes, but we cannot parse...
 	err := ic.c.CallContext(ctx, &r, "admin_peers")
@@ -73,7 +73,7 @@ func (ic *Client) AdminPeers(ctx context.Context) ([]*p2p.PeerInfo, error) {
 	return r, err
 }
 
-func (ic *Client) NodeInfo(ctx context.Context) (*p2p.PeerInfo, error) {
+func (ic *client) NodeInfo(ctx context.Context) (*p2p.PeerInfo, error) {
 	var r *p2p.PeerInfo
 	err := ic.c.CallContext(ctx, &r, "admin_nodeInfo")
 	if err != nil {
@@ -83,7 +83,7 @@ func (ic *Client) NodeInfo(ctx context.Context) (*p2p.PeerInfo, error) {
 }
 
 // ----------------------------------------------------------------------------
-func (ic *Client) BlockNumber(ctx context.Context) (*big.Int, error) {
+func (ic *client) BlockNumber(ctx context.Context) (*big.Int, error) {
 	var r string
 	err := ic.c.CallContext(ctx, &r, "eth_blockNumber")
 	if err != nil {
@@ -95,7 +95,7 @@ func (ic *Client) BlockNumber(ctx context.Context) (*big.Int, error) {
 
 // ----------------------------------------------------------------------------
 
-func (ic *Client) StartMining(ctx context.Context) error {
+func (ic *client) StartMining(ctx context.Context) error {
 	var r []byte
 	// TODO: Result needs to be verified
 	// The response data type are bytes, but we cannot parse...
@@ -106,7 +106,7 @@ func (ic *Client) StartMining(ctx context.Context) error {
 	return err
 }
 
-func (ic *Client) StopMining(ctx context.Context) error {
+func (ic *client) StopMining(ctx context.Context) error {
 	err := ic.c.CallContext(ctx, nil, "miner_stop", nil)
 	if err != nil {
 		return err
@@ -116,7 +116,7 @@ func (ic *Client) StopMining(ctx context.Context) error {
 
 // ----------------------------------------------------------------------------
 
-func (ic *Client) SendTransaction(ctx context.Context, from, to common.Address, value *big.Int) (txHash string, err error) {
+func (ic *client) SendTransaction(ctx context.Context, from, to common.Address, value *big.Int) (txHash string, err error) {
 	var hex hexutil.Bytes
 	arg := map[string]interface{}{
 		"from":  from,
@@ -129,7 +129,7 @@ func (ic *Client) SendTransaction(ctx context.Context, from, to common.Address,
 	return
 }
 
-func (ic *Client) CreateContract(ctx context.Context, from common.Address, bytecode string, gas *big.Int) (txHash string, err error) {
+func (ic *client) CreateContract(ctx context.Context, from common.Address, bytecode string, gas *big.Int) (txHash string, err error) {
 	var hex hexutil.Bytes
 	arg := map[string]interface{}{
 		"from": from,
@@ -142,7 +142,7 @@ func (ic *Client) CreateContract(ctx context.Context, from common.Address, bytec
 	return
 }
 
-func (ic *Client) CreatePrivateContract(ctx context.Context, from common.Address, bytecode string, gas *big.Int, privateFor []string) (txHash string, err error) {
+func (ic *client) CreatePrivateContract(ctx context.Context, from common.Address, bytecode string, gas *big.Int, privateFor []string) (txHash string, err error) {
 	var hex hexutil.Bytes
 	arg := map[string]interface{}{
 		"from":       from,
@@ -158,7 +158,7 @@ func (ic *Client) CreatePrivateContract(ctx context.Context, from common.Address
 
 // ----------------------------------------------------------------------------
 
-func (ic *Client) ProposeValidator(ctx context.Context, address common.Address, auth bool) error {
+func (ic *client) ProposeValidator(ctx context.Context, address common.Address, auth bool) error {
 	var r []byte
 	// TODO: Result needs to be verified with other method
 	// The response data type are bytes, but we cannot parse...
@@ -183,7 +183,7 @@ func (addrs addresses) Swap(i, j int) {
 	addrs[i], addrs[j] = addrs[j], addrs[i]
 }
 
-func (ic *Client) GetValidators(ctx context.Context, blockNumbers *big.Int) ([]common.Address, error) {
+func (ic *client) GetValidators(ctx context.Context, blockNumbers *big.Int) ([]common.Address, error) {
 	var r []common.Address
 	err := ic.c.CallContext(ctx, &r, "istanbul_getValidators", toNumArg(blockNumbers))
 	if err == nil && r == nil {

client/ethclient.go

@@ -31,7 +31,7 @@ import (
 //
 // Note that loading full blocks requires two requests. Use HeaderByHash
 // if you don't need all transactions or uncle headers.
-func (c *Client) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
+func (c *client) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
 	return c.ethClient.BlockByHash(ctx, hash)
 }
 
@@ -40,122 +40,122 @@ func (c *Client) BlockByHash(ctx context.Context, hash common.Hash) (*types.Bloc
 //
 // Note that loading full blocks requires two requests. Use HeaderByNumber
 // if you don't need all transactions or uncle headers.
-func (c *Client) BlockByNumber(ctx context.Context, number *big.Int) (*types.Block, error) {
+func (c *client) BlockByNumber(ctx context.Context, number *big.Int) (*types.Block, error) {
 	return c.ethClient.BlockByNumber(ctx, number)
 }
 
 // HeaderByHash returns the block header with the given hash.
-func (c *Client) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
+func (c *client) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
 	return c.ethClient.HeaderByHash(ctx, hash)
 }
 
 // HeaderByNumber returns a block header from the current canonical chain. If number is
 // nil, the latest known header is returned.
-func (c *Client) HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error) {
+func (c *client) HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error) {
 	return c.ethClient.HeaderByNumber(ctx, number)
 }
 
 // TransactionByHash returns the transaction with the given hash.
-func (c *Client) TransactionByHash(ctx context.Context, hash common.Hash) (tx *types.Transaction, isPending bool, err error) {
+func (c *client) TransactionByHash(ctx context.Context, hash common.Hash) (tx *types.Transaction, isPending bool, err error) {
 	return c.ethClient.TransactionByHash(ctx, hash)
 }
 
 // TransactionCount returns the total number of transactions in the given block.
-func (c *Client) TransactionCount(ctx context.Context, blockHash common.Hash) (uint, error) {
+func (c *client) TransactionCount(ctx context.Context, blockHash common.Hash) (uint, error) {
 	return c.ethClient.TransactionCount(ctx, blockHash)
 }
 
 // TransactionInBlock returns a single transaction at index in the given block.
-func (c *Client) TransactionInBlock(ctx context.Context, blockHash common.Hash, index uint) (*types.Transaction, error) {
+func (c *client) TransactionInBlock(ctx context.Context, blockHash common.Hash, index uint) (*types.Transaction, error) {
 	return c.ethClient.TransactionInBlock(ctx, blockHash, index)
 }
 
 // TransactionReceipt returns the receipt of a transaction by transaction hash.
 // Note that the receipt is not available for pending transactions.
-func (c *Client) TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error) {
+func (c *client) TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error) {
 	return c.ethClient.TransactionReceipt(ctx, txHash)
 }
 
 // SyncProgress retrieves the current progress of the sync algorithm. If there's
 // no sync currently running, it returns nil.
-func (c *Client) SyncProgress(ctx context.Context) (*ethereum.SyncProgress, error) {
+func (c *client) SyncProgress(ctx context.Context) (*ethereum.SyncProgress, error) {
 	return c.ethClient.SyncProgress(ctx)
 }
 
 // SubscribeNewHead subscribes to notifications about the current blockchain head
 // on the given channel.
-func (c *Client) SubscribeNewHead(ctx context.Context, ch chan<- *types.Header) (ethereum.Subscription, error) {
+func (c *client) SubscribeNewHead(ctx context.Context, ch chan<- *types.Header) (ethereum.Subscription, error) {
 	return c.ethClient.SubscribeNewHead(ctx, ch)
 }
 
 // State Access
 
 // NetworkID returns the network ID (also known as the chain ID) for this chain.
-func (c *Client) NetworkID(ctx context.Context) (*big.Int, error) {
+func (c *client) NetworkID(ctx context.Context) (*big.Int, error) {
 	return c.ethClient.NetworkID(ctx)
 }
 
 // BalanceAt returns the wei balance of the given account.
 // The block number can be nil, in which case the balance is taken from the latest known block.
-func (c *Client) BalanceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (*big.Int, error) {
+func (c *client) BalanceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (*big.Int, error) {
 	return c.ethClient.BalanceAt(ctx, account, blockNumber)
 }
 
 // StorageAt returns the value of key in the contract storage of the given account.
 // The block number can be nil, in which case the value is taken from the latest known block.
-func (c *Client) StorageAt(ctx context.Context, account common.Address, key common.Hash, blockNumber *big.Int) ([]byte, error) {
+func (c *client) StorageAt(ctx context.Context, account common.Address, key common.Hash, blockNumber *big.Int) ([]byte, error) {
 	return c.ethClient.StorageAt(ctx, account, key, blockNumber)
 }
 
 // CodeAt returns the contract code of the given account.
 // The block number can be nil, in which case the code is taken from the latest known block.
-func (c *Client) CodeAt(ctx context.Context, account common.Address, blockNumber *big.Int) ([]byte, error) {
+func (c *client) CodeAt(ctx context.Context, account common.Address, blockNumber *big.Int) ([]byte, error) {
 	return c.ethClient.CodeAt(ctx, account, blockNumber)
 }
 
 // NonceAt returns the account nonce of the given account.
 // The block number can be nil, in which case the nonce is taken from the latest known block.
-func (c *Client) NonceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (uint64, error) {
+func (c *client) NonceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (uint64, error) {
 	return c.ethClient.NonceAt(ctx, account, blockNumber)
 }
 
 // Filters
 
 // FilterLogs executes a filter query.
-func (c *Client) FilterLogs(ctx context.Context, q ethereum.FilterQuery) ([]types.Log, error) {
+func (c *client) FilterLogs(ctx context.Context, q ethereum.FilterQuery) ([]types.Log, error) {
 	return c.ethClient.FilterLogs(ctx, q)
 }
 
 // SubscribeFilterLogs subscribes to the results of a streaming filter query.
-func (c *Client) SubscribeFilterLogs(ctx context.Context, q ethereum.FilterQuery, ch chan<- types.Log) (ethereum.Subscription, error) {
+func (c *client) SubscribeFilterLogs(ctx context.Context, q ethereum.FilterQuery, ch chan<- types.Log) (ethereum.Subscription, error) {
 	return c.ethClient.SubscribeFilterLogs(ctx, q, ch)
 }
 
 // Pending State
 
 // PendingBalanceAt returns the wei balance of the given account in the pending state.
-func (c *Client) PendingBalanceAt(ctx context.Context, account common.Address) (*big.Int, error) {
+func (c *client) PendingBalanceAt(ctx context.Context, account common.Address) (*big.Int, error) {
 	return c.ethClient.PendingBalanceAt(ctx, account)
 }
 
 // PendingStorageAt returns the value of key in the contract storage of the given account in the pending state.
-func (c *Client) PendingStorageAt(ctx context.Context, account common.Address, key common.Hash) ([]byte, error) {
+func (c *client) PendingStorageAt(ctx context.Context, account common.Address, key common.Hash) ([]byte, error) {
 	return c.ethClient.PendingStorageAt(ctx, account, key)
 }
 
 // PendingCodeAt returns the contract code of the given account in the pending state.
-func (c *Client) PendingCodeAt(ctx context.Context, account common.Address) ([]byte, error) {
+func (c *client) PendingCodeAt(ctx context.Context, account common.Address) ([]byte, error) {
 	return c.ethClient.PendingCodeAt(ctx, account)
 }
 
 // PendingNonceAt returns the account nonce of the given account in the pending state.
 // This is the nonce that should be used for the next transaction.
-func (c *Client) PendingNonceAt(ctx context.Context, account common.Address) (uint64, error) {
+func (c *client) PendingNonceAt(ctx context.Context, account common.Address) (uint64, error) {
 	return c.ethClient.PendingNonceAt(ctx, account)
 }
 
 // PendingTransactionCount returns the total number of transactions in the pending state.
-func (c *Client) PendingTransactionCount(ctx context.Context) (uint, error) {
+func (c *client) PendingTransactionCount(ctx context.Context) (uint, error) {
 	return c.ethClient.PendingTransactionCount(ctx)
 }
 
@@ -167,19 +167,19 @@ func (c *Client) PendingTransactionCount(ctx context.Context) (uint, error) {
 // blockNumber selects the block height at which the call runs. It can be nil, in which
 // case the code is taken from the latest known block. Note that state from very old
 // blocks might not be available.
-func (c *Client) CallContract(ctx context.Context, msg ethereum.CallMsg, blockNumber *big.Int) ([]byte, error) {
+func (c *client) CallContract(ctx context.Context, msg ethereum.CallMsg, blockNumber *big.Int) ([]byte, error) {
 	return c.ethClient.CallContract(ctx, msg, blockNumber)
 }
 
 // PendingCallContract executes a message call transaction using the EVM.
 // The state seen by the contract call is the pending state.
-func (c *Client) PendingCallContract(ctx context.Context, msg ethereum.CallMsg) ([]byte, error) {
+func (c *client) PendingCallContract(ctx context.Context, msg ethereum.CallMsg) ([]byte, error) {
 	return c.ethClient.PendingCallContract(ctx, msg)
 }
 
 // SuggestGasPrice retrieves the currently suggested gas price to allow a timely
 // execution of a transaction.
-func (c *Client) SuggestGasPrice(ctx context.Context) (*big.Int, error) {
+func (c *client) SuggestGasPrice(ctx context.Context) (*big.Int, error) {
 	return c.ethClient.SuggestGasPrice(ctx)
 }
 
@@ -187,7 +187,7 @@ func (c *Client) SuggestGasPrice(ctx context.Context) (*big.Int, error) {
 // the current pending state of the backend blockchain. There is no guarantee that this is
 // the true gas limit requirement as other transactions may be added or removed by miners,
 // but it should provide a basis for setting a reasonable default.
-func (c *Client) EstimateGas(ctx context.Context, msg ethereum.CallMsg) (*big.Int, error) {
+func (c *client) EstimateGas(ctx context.Context, msg ethereum.CallMsg) (*big.Int, error) {
 	return c.ethClient.EstimateGas(ctx, msg)
 }
 
@@ -195,6 +195,6 @@ func (c *Client) EstimateGas(ctx context.Context, msg ethereum.CallMsg) (*big.In
 //
 // If the transaction was a contract creation use the TransactionReceipt method to get the
 // contract address after the transaction has been mined.
-func (c *Client) SendRawTransaction(ctx context.Context, tx *types.Transaction) error {
+func (c *client) SendRawTransaction(ctx context.Context, tx *types.Transaction) error {
 	return c.ethClient.SendTransaction(ctx, tx)
 }

common/transactions.go

@@ -32,7 +32,7 @@ var (
 	DefaultGasLimit int64 = 22000 // the gas of ether tx should be 21000
 )
 
-func SendEther(client *client.Client, from *ecdsa.PrivateKey, to common.Address, amount *big.Int, nonce uint64) error {
+func SendEther(client client.Client, from *ecdsa.PrivateKey, to common.Address, amount *big.Int, nonce uint64) error {
 	tx := types.NewTransaction(nonce, to, amount, big.NewInt(DefaultGasLimit), big.NewInt(DefaultGasPrice), []byte{})
 	signedTx, err := types.SignTx(tx, types.NewEIP155Signer(big.NewInt(2017)), from)
 	if err != nil {

container/ethereum.go

@@ -67,7 +67,7 @@ type Ethereum interface {
 
 	ContainerID() string
 	Host() string
-	NewClient() *client.Client
+	NewClient() client.Client
 	ConsensusMonitor(err chan<- error, quit chan struct{})
 
 	WaitForProposed(expectedAddress common.Address, t time.Duration) error
@@ -356,7 +356,7 @@ func (eth *ethereum) Running() bool {
 	return false
 }
 
-func (eth *ethereum) NewClient() *client.Client {
+func (eth *ethereum) NewClient() client.Client {
 	var scheme, port string
 
 	if eth.rpcPort != "" {

k8s/ethereum.go

@@ -106,7 +106,7 @@ func (eth *ethereum) DockerBinds() []string {
 	return nil
 }
 
-func (eth *ethereum) NewClient() *client.Client {
+func (eth *ethereum) NewClient() client.Client {
 	for i := 0; i < healthCheckRetryCount; i++ {
 		client, err := client.Dial("ws://" + eth.Host() + ":8546")
 		if err != nil {

k8s/transactor.go

@@ -28,10 +28,10 @@ import (
 )
 
 type Transactor interface {
-	SendTransactions(*client.Client, *big.Int, time.Duration) error
+	SendTransactions(client.Client, *big.Int, time.Duration) error
 }
 
-func (eth *ethereum) SendTransactions(client *client.Client, amount *big.Int, duration time.Duration) error {
+func (eth *ethereum) SendTransactions(client client.Client, amount *big.Int, duration time.Duration) error {
 	var fns []func() error
 	for i, key := range eth.accounts {
 		i := i

tests/quorum/functional/private_transaction_test.go

@@ -190,7 +190,7 @@ func genByteCodeWithValue(v int) string {
 	return fmt.Sprintf("%s%064x", testBaseByteCode, v)
 }
 
-func getTxReceipt(ethClient *client.Client, txHash common.Hash, timeout time.Duration) (*types.Receipt, error) {
+func getTxReceipt(ethClient client.Client, txHash common.Hash, timeout time.Duration) (*types.Receipt, error) {
 	timer := time.After(timeout)
 	ticker := time.NewTicker(3 * time.Second)
 	defer ticker.Stop()
@@ -207,7 +207,7 @@ func getTxReceipt(ethClient *client.Client, txHash common.Hash, timeout time.Dur
 	}
 }
 
-func checkContractValue(ethClient *client.Client, txHash common.Hash, expValue int) error {
+func checkContractValue(ethClient client.Client, txHash common.Hash, expValue int) error {
 	receipt, err := getTxReceipt(ethClient, txHash, 10*time.Second)
 	if err != nil {
 		return err