WalletL1

Manages and interacts with accounts on L1

The WalletL1 class provides functionalities for managing and interacting with accounts on the Layer 1 (L1) network. It includes methods for creating wallets, querying contracts, checking balances, and performing transactions on the Ethereum network.

`AllowanceL1`

Returns the amount of approved tokens for a specific L1 bridge.

Inputs

Parameter	Type	Description
`opts`	`CallOpts` (optional)	Call options.
`token`	`common.Address`	Token address.
`bridgeAddress`	`common.Address`	Bridge address.

AllowanceL1(opts *CallOpts, token common.Address, bridgeAddress common.Address) (*big.Int, error)

Example

// The Crown token on testnet
TokenAddress := common.HexToAddress("0x927488F48ffbc32112F1fF721759649A89721F8F")

contracts, err := client.BridgeContracts(context.Background())
if err != nil {
  log.Panic(err)
}
bridgeAllowance, err := wallet.AllowanceL1(nil, TokenAddress, contracts.L1Erc20DefaultBridge)
if err != nil {
  log.Panic(err)
}
fmt.Println("Bridge allowance: ", bridgeAllowance)

`ApproveToken`

Approves the specified amount of tokens for the specified L1 bridge.

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.
`token`	`common.Address`	L1 token address.
`amount`	`*big.Int`	Approval amount.

ApproveToken(auth *TransactOptsL1, token common.Address, amount *big.Int, bridgeAddress common.Address) (*types.Transaction, error)

Example

// The Crown token on testnet
TokenAddress := common.HexToAddress("0x927488F48ffbc32112F1fF721759649A89721F8F")

contracts, err := client.BridgeContracts(context.Background())
if err != nil {
  log.Panic(err)
}
tx, err := wallet.ApproveToken(nil, TokenAddress, contracts.L1Erc20DefaultBridge)
if err != nil {
  log.Panic(err)
}
fmt.Println("Tx: ", tx.Hash())

`BalanceL1`

Returns the balance of the specified token on L1 that can be either ETH or any ERC20 token.

Inputs

Parameter	Type	Description
`opts`	`CallOpts` (optional)	Call options.
`token`	`common.Address`	Token address.

BalanceL1(opts *CallOpts, token common.Address) (*big.Int, error)

Example

balance, err := wallet.BalanceL1(nil, utils.EthAddress)
if err != nil {
  log.Panic(err)
}
fmt.Println("Balance: ", balance)

`BaseCost`

Returns base cost for L2 transaction.

Inputs

Parameter	Type	Description
`opts`	`CallOpts` (optional)	Call options.
`gasLimit`	`*big.Int`	The gasLimit for the the L2 contract call.
`gasPerPubdataByte`	`*big.Int`	The L2 gas price for each published L1 calldata byte.
`gasPrice`	`*big.Int` (optional)	The L1 gas price of the L1 transaction that will send the request for an execute call.

BaseCost(opts *CallOpts, gasLimit, gasPerPubdataByte, gasPrice *big.Int) (*big.Int, error)

Example

gasPrice, err := client.SuggestGasPrice(context.Background())
if err != nil {
  log.Panic(err)
}

baseCost, err := wallet.BaseCost(nil, big.NewInt(9000), utils.RequiredL1ToL2GasPerPubdataLimit, gasPrice)
if err != nil {
  log.Panic(err)
}
fmt.Println("Base cost: ", baseCost)

`BaseToken`

Returns the address of the base token on L1.

Inputs

Parameter	Type	Description
`opts`	`CallOpts` (optional)	Call options.

BaseToken(opts *CallOpts) (common.Address, error)

Example

baseToken, err := wallet.BaseToken(nil)
if err != nil {
  log.Panic(err)
}
fmt.Println("Base token: ", baseToken)

`BridgehubContract`

Returns the Bridgehub L1 smart contract.

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.

BridgehubContract(_ context.Context) (*bridgehub.IBridgehub, error)

Example

bridgehub, err := wallet.BridgehubContract(context.Background())
if err != nil {
  log.Panic(err)
}

`ClaimFailedDeposit`

Withdraws funds from the initiated deposit, which failed when finalizing on L2. If the deposit L2 transaction has failed, it sends an L1 transaction calling ClaimFailedDeposit method of the L1 bridge, which results in returning L1 tokens back to the depositor, otherwise throws the error.

Inputs

Parameter	Type	Description
`auth`	`*TransactOptsL1` (optional)	Transaction options.
`depositHash`	`common.Hash`	The L2 transaction hash of the failed deposit.

ClaimFailedDeposit(auth *TransactOptsL1, depositHash common.Hash) (*types.Transaction, error)

Example

failedDepositL2Hash := common.HexToHash("<deposit L2 hash>")
cfdTx, err := wallet.ClaimFailedDeposit(nil, failedDepositL2Hash)
if err != nil {
  log.Panic(err)
}
fmt.Println("ClaimFailedDeposit hash: ", cfdTx.Hash)

`Deposit`

Transfers the specified token from the associated account on the L1 network to the target account on the L2 network. The token can be either ETH or any ERC20 token. For ERC20 tokens, enough approved tokens must be associated with the specified L1 bridge (default one or the one defined in BridgeAddress). In this case, depending on is the chain ETH-based or not ApproveToken or ApproveBaseToken can be enabled to perform token approval. to perform token approval. If there are already enough approved tokens for the L1 bridge, token approval will be skipped. To check the amount of approved tokens for a specific bridge, use the AllowanceL1 method.

Inputs

Parameter	Type	Description
`auth`	`*TransactOptsL1` (optional)	Transaction options.
`tx`	`DepositTransaction`	Deposit transaction parameters.

Deposit(auth *TransactOptsL1, tx DepositTransaction) (*types.Transaction, error)

Example

Deposit ETH on ETH-based chain.

tx, err := wallet.Deposit(nil, accounts.DepositTransaction{
  To:              wallet.Address(),
  Token:           utils.LegacyEthAddress,
  Amount:          amount,
  RefundRecipient: wallet.Address(),
})
if err != nil {
    log.Panic(err)
}

l1Receipt, err := bind.WaitMined(context.Background(), ethClient, tx)
if err != nil {
    log.Panic(err)
}

l2Tx, err := client.L2TransactionFromPriorityOp(context.Background(), l1Receipt)
if err != nil {
    log.Panic(err)
}

l2Receipt, err := client.WaitMined(context.Background(), l2Tx.Hash)
if err != nil {
    log.Panic(err)
}

Deposit token on ETH-based chain.

tx, err := wallet.Deposit(nil, accounts.DepositTransaction{
  To:              wallet.Address(),
  Token:           L1Dai,
  Amount:          amount,
  ApproveToken:    true,
  RefundRecipient: wallet.Address(),
})
if err != nil {
    log.Panic(err)
}

l1Receipt, err := bind.WaitMined(context.Background(), ethClient, tx)
if err != nil {
    log.Panic(err)
}

l2Tx, err := client.L2TransactionFromPriorityOp(context.Background(), l1Receipt)
if err != nil {
    log.Panic(err)
}

l2Receipt, err := client.WaitMined(context.Background(), l2Tx.Hash)
if err != nil {
    log.Panic(err)
}

Deposit ETH on non-ETH-based chain.

tx, err := wallet.Deposit(nil, accounts.DepositTransaction{
  To:               wallet.Address(),
  Token:            utils.LegacyEthAddress,
  Amount:           amount,
  ApproveBaseToken: true,
  RefundRecipient:  wallet.Address(),
})
if err != nil {
    log.Panic(err)
}

l1Receipt, err := bind.WaitMined(context.Background(), ethClient, tx)
if err != nil {
    log.Panic(err)
}

l2Tx, err := client.L2TransactionFromPriorityOp(context.Background(), l1Receipt)
if err != nil {
    log.Panic(err)
}

l2Receipt, err := client.WaitMined(context.Background(), l2Tx.Hash)
if err != nil {
    log.Panic(err)
}

Deposit base token on non-ETH-based chain.

baseToken, err := wallet.BaseToken(nil)
if err != nil {
    log.Panic(err)
}

tx, err := wallet.Deposit(nil, accounts.DepositTransaction{
  To:               wallet.Address(),
  Token:            baseToken,
  Amount:           amount,
  ApproveBaseToken: true,
  RefundRecipient:  wallet.Address(),
})
if err != nil {
    log.Panic(err)
}

l1Receipt, err := bind.WaitMined(context.Background(), ethClient, tx)
if err != nil {
    log.Panic(err)
}

l2Tx, err := client.L2TransactionFromPriorityOp(context.Background(), l1Receipt)
if err != nil {
    log.Panic(err)
}

l2Receipt, err := client.WaitMined(context.Background(), l2Tx.Hash)
if err != nil {
    log.Panic(err)
}

Deposit non-base token on non-ETH-based chain.

tx, err := wallet.Deposit(nil, accounts.DepositTransaction{
  To:               wallet.Address(),
  Token:            L1Dai,
  Amount:           amount,
  ApproveToken:     true,
  ApproveBaseToken: true,
  RefundRecipient:  wallet.Address(),
})
if err != nil {
    log.Panic(err)
}

l1Receipt, err := bind.WaitMined(context.Background(), ethClient, tx)
if err != nil {
    log.Panic(err)
}

l2Tx, err := client.L2TransactionFromPriorityOp(context.Background(), l1Receipt)
if err != nil {
    log.Panic(err)
}

l2Receipt, err := client.WaitMined(context.Background(), l2Tx.Hash)
if err != nil {
    log.Panic(err)
}

`DepositAllowanceParams`

Returns the parameters for the approval token transaction based on the deposit token and amount. Some deposit transactions require multiple approvals. Existing allowance for the bridge is not checked; allowance is calculated solely based on the specified amount.

Inputs

Parameter	Type	Description
`opts`	`CallOpts` (optional)	Call options.
`msg`	`DepositCallMsg`	Deposit call parameters.

DepositAllowanceParams(opts *CallOpts, msg DepositCallMsg) ([]struct {
    Token     common.Address
    Allowance *big.Int
}, error)

Example

Get allowance parameters for depositing token on ETH-based chain.

msg := accounts.DepositCallMsg{
  Token:  common.HexToAddress("<L1 token address>"),
  To:     Receiver,
  Amount: big.NewInt(5),
}

allowanceParams, err := wallet.DepositAllowanceParams(nil, msg)
if err != nil {
    log.Panic(err)
}
bridgeContracts, err := client.BridgeContracts(context.Background())
if err != nil {
    log.Panic(err)
}
approveTx, err := wallet.ApproveToken(nil, allowanceParams[0].Token, allowanceParams[0].Allowance, bridgeContracts.L1SharedBridge)
if err != nil {
    log.Panic(err)
}
_, err = bind.WaitMined(context.Background(), ethClient, approveTx)
if err != nil {
    log.Panic(err)
}

Get allowance parameters for depositing ETH on non-ETH-based chain.

msg := accounts.DepositCallMsg{
  Token:  utils.LegacyEthAddress,
  To:     Receiver,
  Amount: big.NewInt(7_000_000_000),
}

allowanceParams, err := wallet.DepositAllowanceParams(nil, msg)
if err != nil {
    log.Panic(err)
}
bridgeContracts, err := client.BridgeContracts(context.Background())
if err != nil {
    log.Panic(err)
}
approveTx, err := wallet.ApproveToken(nil, allowanceParams[0].Token, allowanceParams[0].Allowance, bridgeContracts.L1SharedBridge)
if err != nil {
    log.Panic(err)
}
_, err = bind.WaitMined(context.Background(), ethClient, approveTx)
if err != nil {
    log.Panic(err)
}

Get allowance parameters for depositing base token on non-ETH-based chain.

token, err := wallet.BaseToken(nil)
if err != nil {
    log.Panic(err)
}

msg := accounts.DepositCallMsg{
    Token:  token,
    To:     Receiver,
    Amount: big.NewInt(7_000_000_000),
}

allowanceParams, err := wallet.DepositAllowanceParams(nil, msg)
if err != nil {
    log.Panic(err)
}
bridgeContracts, err := client.BridgeContracts(context.Background())
if err != nil {
    log.Panic(err)
}
approveTx, err := wallet.ApproveToken(nil, allowanceParams[0].Token, allowanceParams[0].Allowance, bridgeContracts.L1SharedBridge)
if err != nil {
    log.Panic(err)
}
_, err = bind.WaitMined(context.Background(), ethClient, approveTx)
if err != nil {
    log.Panic(err)
}

Get allowance parameters for depositing non-base token on non-ETH-based chain.

msg := accounts.DepositCallMsg{
  Token:  common.HexToAddress("<L1 token address>"),
  To:     Receiver,
  Amount: big.NewInt(5),
}

allowanceParams, err := wallet.DepositAllowanceParams(nil, msg)
if err != nil {
    log.Panic(err)
}
bridgeContracts, err := client.BridgeContracts(context.Background())
if err != nil {
    log.Panic(err)
}
approveTx, err := wallet.ApproveToken(nil, allowanceParams[0].Token, allowanceParams[0].Allowance, bridgeContracts.L1SharedBridge)
if err != nil {
    log.Panic(err)
}
_, err = bind.WaitMined(context.Background(), ethClient, approveTx)
if err != nil {
    log.Panic(err)
}
approveTx, err = wallet.ApproveToken(nil, allowanceParams[1].Token, allowanceParams[1].Allowance, bridgeContracts.L1SharedBridge)
if err != nil {
    log.Panic(err)
}
_, err = bind.WaitMined(context.Background(), ethClient, approveTx)
if err != nil {
    log.Panic(err)
}

ZkSyncEraProvider := "https://testnet.era.zksync.dev"

client, err := clients.Dial(ZkSyncEraProvider)
if err != nil {
  log.Panic(err)
}
defer client.Close()

gasPrice, err := client.SuggestGasPrice(context.Background())
if err != nil {
  log.Panic(err)
}

baseCost, err := wallet.BaseCost(nil, big.NewInt(9000), utils.RequiredL1ToL2GasPerPubdataLimit, gasPrice)
if err != nil {
  log.Panic(err)
}
fmt.Println("Base cost: ", baseCost)

`EstimateCustomBridgeDepositL2Gas`

Used by EstimateDefaultBridgeDepositL2Gas to estimate L2 gas required for token bridging via a custom ERC20 bridge.

See the default bridges documentation

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.
`l1BridgeAddress`	`common.Address`	L1 bridge address.
`l2BridgeAddress`	`common.Address`	L2 bridge address.
`token`	`common.Address`	Token address.
`amount`	`*big.Int`	Deposit amount.
`to`	`common.Address`	Recipient address.
`bridgeData`	`[]byte`	Bridge data.
`from`	`common.Address` (optional)	Sender address.
`gasPerPubdataByte`	`*big.Int` (optional)	Current gas per byte of pubdata.

EstimateCustomBridgeDepositL2Gas(ctx context.Context, l1BridgeAddress, l2BridgeAddress, token common.Address,
  amount *big.Int, to common.Address, bridgeData []byte, from common.Address, gasPerPubdataByte *big.Int) (uint64, error)

Example

L1BridgeAddress := common.HexToAddress("<Bridge address>")
Token := common.HexToAddress("<Token address>")
From := common.HexToAddress("<Sender address>")
To := common.HexToAddress("<Receipt address>")

bridge, err := l1bridge.NewIL1Bridge(L1BridgeAddress, ethClient)
if err != nil {
  log.Panic(err)
}
l2BridgeAddress, err := bridge.L2Bridge(nil)
if err != nil {
  log.Panic(err)
}
customBridgeData, err := utils.Erc20DefaultBridgeData(Token, ethClient)
if err != nil {
  log.Panic(err)
}

gas, err := wallet1.EstimateCustomBridgeDepositL2Gas(context.Background(), L1BridgeAddress, l2BridgeAddress, Token,
  big.NewInt(7), To, customBridgeData, From, utils.RequiredL1ToL2GasPerPubdataLimit)
if err != nil {
  log.Panic(err)
}
fmt.Println("L2 gas: ", gas)

`EstimateDefaultBridgeDepositL2Gas`

Returns an estimation of L2 gas required for token bridging via the default ERC20 bridge.

See the default bridges documentation

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.
`token`	`common.Address`	Token address.
`amount`	`*big.Int`	Deposit amount.
`to`	`common.Address`	Recipient address.
`from`	`common.Address` (optional)	Sender address.
`gasPerPubdataByte`	`*big.Int` (optional)	Current gas per byte of pubdata.

EstimateDefaultBridgeDepositL2Gas(ctx context.Context, token common.Address, amount *big.Int,
         to, from common.Address, gasPerPubdataByte *big.Int) (uint64, error)

Example

Token := common.HexToAddress("<Token address>")
From := common.HexToAddress("<Sender address>")
To := common.HexToAddress("<Receipt address>")
gas, err := wallet1.EstimateDefaultBridgeDepositL2Gas(
  context.Background(), Token, big.NewInt(7), To, From, utils.RequiredL1ToL2GasPerPubdataLimit,
)
if err != nil {
  log.Panic(err)
}
fmt.Println("L2 gas: ", gas)

/;

`EstimateGasDeposit`

Estimates the amount of gas required for a deposit transaction on L1 network. Gas of approving ERC20 token is not included in the estimation.

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.
`msg`	`DepositCallMsg`	Deposit call parameters.

EstimateGasDeposit(ctx context.Context, msg DepositCallMsg) (uint64, error)

Example

depositGas, err := wallet.EstimateGasDeposit(context.Background(), accounts.DepositCallMsg{
  To:    wallet.Address(),
  Token: utils.EthAddress,
  Amount: big.NewInt(7_000_000_000),
})
if err != nil {
  log.Panic(err)
}
fmt.Println("Deposit gas: ", depositGas)

`EstimateGasRequestExecute`

Estimates the amount of gas required for a request execute transaction.

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.
`msg`	`RequestExecuteCallMsg`	Request execute call parameters.

EstimateGasRequestExecute(ctx context.Context, msg RequestExecuteCallMsg) (uint64, error)

Example

contractAddress := common.HexToAddress("<Contract address>")
gas, err := wallet.EstimateGasRequestExecute(context.Background(), accounts.RequestExecuteCallMsg{
  ContractAddress:   contractAddress,
  L2Value:           big.NewInt(7_000_000_000),
  L2GasLimit:        big.NewInt(90_000),
  GasPerPubdataByte: utils.RequiredL1ToL2GasPerPubdataLimit,
  RefundRecipient:   to,
})
if err != nil {
  log.Panic(err)
}
fmt.Println("Gas: ", gas)

`FinalizeWithdraw`

Proves the inclusion of the L2 -> L1 withdrawal message.

Inputs

Parameter	Type	Description
`auth`	`*TransactOptsL1` (optional)	Transaction options.
`withdrawalHash`	`common.Hash`	Hash of the L2 transaction where the withdrawal was initiated.
`index`	`int`	In case there were multiple withdrawals in one transaction, you may pass an index of the withdrawal you want to finalize.

FinalizeWithdraw(auth *TransactOptsL1, withdrawalHash common.Hash, index int) (*types.Transaction, error)

Example

withdrawalHash := common.HexToHash("<tx hash>")
finalizeWithdrawTx, err := wallet.FinalizeWithdraw(nil, withdrawalHash, 0)
if err != nil {
  log.Panic(err)
}
fmt.Println("Finalize withdraw transaction: ", finalizeWithdrawTx.Hash())

`FullRequiredDepositFee`

Retrieves the full needed ETH fee for the deposit on both L1 and L2 networks.

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.
`msg`	`DepositCallMsg`	Deposit call parameters.

FullRequiredDepositFee(ctx context.Context, msg DepositCallMsg) (*FullDepositFee, error)

Example

fee, err := wallet.FullRequiredDepositFee(context.Background(), accounts.DepositCallMsg{
  To:    wallet.Address(),
  Token: utils.EthAddress,
  Amount: big.NewInt(7_000_000_000),
})
if err != nil {
  log.Panic(err)
}
fmt.Printf("Fee: %+v\n", fee)

`Init`

Creates an instance of WalletL1 associated with the account provided by the raw private key.

func NewWalletL1(rawPrivateKey []byte, clientL1 *ethclient.Client, clientL2 *clients.Client) (*WalletL1, error

Creates an instance of WalletL1 associated with the account provided by the signer.

NewWalletL1FromSigner(signer *Signer, clientL1 *ethclient.Client, clientL2 *clients.Client) (*WalletL1, error)

Example

PrivateKey     := os.Getenv("PRIVATE_KEY")
ZkSyncEraProvider := "https://sepolia.era.zksync.dev"
EthereumProvider := "https://rpc.ankr.com/eth_sepolia"

client, err := clients.Dial(ZkSyncEraProvider)
if err != nil {
  log.Panic(err)
}
defer client.Close()

ethClient, err := ethclient.Dial(EthereumProvider)
if err != nil {
  log.Panic(err)
}
defer ethClient.Close()

wallet, err := accounts.NewWalletL1(common.Hex2Bytes(PrivateKey), &client, ethClient)
if err != nil {
  log.Panic(err)
}

`IsEthBasedChain`

Returns whether the chain is ETH-based.

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.

IsEthBasedChain(ctx context.Context) (bool, error)

Example

isEthBased, err := wallet.IsEthBasedChain(context.Background())
if err != nil {
  log.Panic(err)
}
fmt.Println("Is ETH-based chain: ", isEthBased)

`IsWithdrawFinalized`

Checks if the withdrawal finalized on L1 network.

Inputs

Parameter	Type	Description
`opts`	`CallOpts` (optional)	Call options.
`withdrawalHash`	`common.Hash`	Hash of the L2 transaction where the withdrawal was initiated.
`index`	`int`	In case there where multiple withdrawals in one transaction, you may pass an index of the withdrawal you want to finalize.

IsWithdrawFinalized(opts *CallOpts, withdrawalHash common.Hash, index int) (bool, error)

Example

withdrawalHash := common.HexToHash("<tx hash>")
isFinalized, err := wallet.IsWithdrawFinalized(nil, withdrawalHash, 0)
if err != nil {
  log.Panic(err)
}
fmt.Println("Is withdrawal finalized: ", isFinalized)

`L1BridgeContracts`

Returns L1 bridge contracts.

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.

L1BridgeContracts(ctx context.Context) (*zkTypes.L1BridgeContracts, error)

Example

contracts, err := wallet.L1BridgeContracts(context.Background())
if err != nil {
  log.Panic(err)
}

`L2TokenAddress`

Returns the corresponding address on the L2 network for the token on the L1 network.

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.
`token`	`common.Address`	L1 token address.

L2TokenAddress(ctx context.Context, token common.Address) (common.Address, error)

Example

l1DAI := common.HexToAddress("0x5C221E77624690fff6dd741493D735a17716c26B")
l2DAI, err := wallet.L2TokenAddress(context.Background(), l1DAI)
if err != nil {
  log.Panic(err)
}
fmt.Println("L2 DAI address: ", l2DAI)

`MainContract`

Returns the ZKsync L1 smart contract.

Inputs

Parameter	Type	Description
`ctx`	`context.Context`	Context.

MainContract(ctx context.Context) (*zksync.IZkSync, error)

Example

mainContract, err := wallet.MainContract(context.Background())
if err != nil {
  log.Panic(err)
}

`RequestExecute`

Request execution of L2 transaction from L1.

Inputs

Parameter	Type	Description
`auth`	`*TransactOptsL1` (optional)	Transaction options.
`tx`	`RequestExecuteTransaction`	Request execute transaction parameters.

RequestExecute(auth *TransactOptsL1, tx RequestExecuteTransaction) (*types.Transaction, error)

Example

contractAddress := common.HexToAddress("<Contract address>")
requestExecuteTx, err := wallet.RequestExecute(nil, accounts.RequestExecuteTransaction{
  ContractAddress:   contractAddress,
  L2Value:           big.NewInt(7_000_000_000),
  L2GasLimit:        big.NewInt(90_000),
  GasPerPubdataByte: utils.RequiredL1ToL2GasPerPubdataLimit,
  RefundRecipient:   to,
})
if err != nil {
  log.Panic(err)
}
fmt.Println("Request execute tx: ", requestExecuteTx.Hash())

`RequestExecuteAllowanceParams`

Returns the parameters for the approval token transaction based on the request execute transaction. Existing allowance for the bridge is not checked; allowance is calculated solely based on the specified transaction.

Inputs

Parameter	Type	Description
`opts`	`CallOpts` (optional)	Call options.
`msg`	`RequestExecuteCallMsg`	Request execute call parameters.

RequestExecuteAllowanceParams(opts *CallOpts, msg RequestExecuteCallMsg) (AllowanceParams, error)

Example

msg := accounts.RequestExecuteCallMsg{
  ContractAddress: wallet.Address(),
  L2Value:         big.NewInt(7_000_000_000),
  Value:           big.NewInt(0),
}
allowanceParams, err := wallet.RequestExecuteAllowanceParams(nil, msg)
if err != nil {
    log.Panic(err)
}

bridgeContracts, err := client.BridgeContracts(context.Background())
if err != nil {
    log.Panic(err)
}

approveTx, err := wallet.ApproveToken(nil, allowanceParams.Token, allowanceParams.Allowance, bridgeContracts.L1SharedBridge)
if err != nil {
    log.Panic(err)
}

_, err = bind.WaitMined(context.Background(), ethClient, approveTx)
if err != nil {
    log.Panic(err)
}

Wallet

Unified interface for managing accounts

WalletL2

Manages and interacts with accounts on L2