98 lines
4.6 KiB
Go
98 lines
4.6 KiB
Go
// Copyright 2015 The go-ethereum Authors
|
|
// 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 bind
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
)
|
|
|
|
var (
|
|
// ErrNoCode is returned by call and transact operations for which the requested
|
|
// recipient contract to operate on does not exist in the state db or does not
|
|
// have any code associated with it (i.e. suicided).
|
|
ErrNoCode = errors.New("no contract code at given address")
|
|
|
|
// This error is raised when attempting to perform a pending state action
|
|
// on a backend that doesn't implement PendingContractCaller.
|
|
ErrNoPendingState = errors.New("backend does not support pending state")
|
|
|
|
// This error is returned by WaitDeployed if contract creation leaves an
|
|
// empty contract behind.
|
|
ErrNoCodeAfterDeploy = errors.New("no contract code after deployment")
|
|
)
|
|
|
|
// ContractCaller defines the methods needed to allow operating with contract on a read
|
|
// only basis.
|
|
type ContractCaller interface {
|
|
// CodeAt returns the code of the given account. This is needed to differentiate
|
|
// between contract internal errors and the local chain being out of sync.
|
|
CodeAt(ctx context.Context, contract common.Address, blockNumber *big.Int) ([]byte, error)
|
|
// ContractCall executes an Ethereum contract call with the specified data as the
|
|
// input.
|
|
CallContract(ctx context.Context, call ethereum.CallMsg, blockNumber *big.Int) ([]byte, error)
|
|
}
|
|
|
|
// DeployBackend wraps the operations needed by WaitMined and WaitDeployed.
|
|
type DeployBackend interface {
|
|
TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error)
|
|
CodeAt(ctx context.Context, account common.Address, blockNumber *big.Int) ([]byte, error)
|
|
}
|
|
|
|
// PendingContractCaller defines methods to perform contract calls on the pending state.
|
|
// Call will try to discover this interface when access to the pending state is requested.
|
|
// If the backend does not support the pending state, Call returns ErrNoPendingState.
|
|
type PendingContractCaller interface {
|
|
// PendingCodeAt returns the code of the given account in the pending state.
|
|
PendingCodeAt(ctx context.Context, contract common.Address) ([]byte, error)
|
|
// PendingCallContract executes an Ethereum contract call against the pending state.
|
|
PendingCallContract(ctx context.Context, call ethereum.CallMsg) ([]byte, error)
|
|
}
|
|
|
|
// ContractTransactor defines the methods needed to allow operating with contract
|
|
// on a write only basis. Beside the transacting method, the remainder are helpers
|
|
// used when the user does not provide some needed values, but rather leaves it up
|
|
// to the transactor to decide.
|
|
type ContractTransactor interface {
|
|
// PendingCodeAt returns the code of the given account in the pending state.
|
|
PendingCodeAt(ctx context.Context, account common.Address) ([]byte, error)
|
|
// PendingNonceAt retrieves the current pending nonce associated with an account.
|
|
PendingNonceAt(ctx context.Context, account common.Address) (uint64, error)
|
|
// SuggestGasPrice retrieves the currently suggested gas price to allow a timely
|
|
// execution of a transaction.
|
|
SuggestGasPrice(ctx context.Context) (*big.Int, error)
|
|
// EstimateGas tries to estimate the gas needed to execute a specific
|
|
// transaction based on 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.
|
|
EstimateGas(ctx context.Context, call ethereum.CallMsg) (usedGas *big.Int, err error)
|
|
// SendTransaction injects the transaction into the pending pool for execution.
|
|
SendTransaction(ctx context.Context, tx *types.Transaction) error
|
|
}
|
|
|
|
// ContractBackend defines the methods needed to work with contracts on a read-write basis.
|
|
type ContractBackend interface {
|
|
ContractCaller
|
|
ContractTransactor
|
|
}
|