diff options
Diffstat (limited to 'eth/bind.go')
| -rw-r--r-- | eth/bind.go | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/eth/bind.go b/eth/bind.go deleted file mode 100644 index 769a6c741..000000000 --- a/eth/bind.go +++ /dev/null @@ -1,136 +0,0 @@ -// 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 eth - -import ( - "context" - "math/big" - - "github.com/ethereum/go-ethereum" - "github.com/ethereum/go-ethereum/common" - "github.com/ethereum/go-ethereum/common/hexutil" - "github.com/ethereum/go-ethereum/core/types" - "github.com/ethereum/go-ethereum/internal/ethapi" - "github.com/ethereum/go-ethereum/rlp" - "github.com/ethereum/go-ethereum/rpc" -) - -// ContractBackend implements bind.ContractBackend with direct calls to Ethereum -// internals to support operating on contracts within subprotocols like eth and -// swarm. -// -// Internally this backend uses the already exposed API endpoints of the Ethereum -// object. These should be rewritten to internal Go method calls when the Go API -// is refactored to support a clean library use. -type ContractBackend struct { - eapi *ethapi.PublicEthereumAPI // Wrapper around the Ethereum object to access metadata - bcapi *ethapi.PublicBlockChainAPI // Wrapper around the blockchain to access chain data - txapi *ethapi.PublicTransactionPoolAPI // Wrapper around the transaction pool to access transaction data -} - -// NewContractBackend creates a new native contract backend using an existing -// Ethereum object. -func NewContractBackend(apiBackend ethapi.Backend) *ContractBackend { - return &ContractBackend{ - eapi: ethapi.NewPublicEthereumAPI(apiBackend), - bcapi: ethapi.NewPublicBlockChainAPI(apiBackend), - txapi: ethapi.NewPublicTransactionPoolAPI(apiBackend, new(ethapi.AddrLocker)), - } -} - -// CodeAt retrieves any code associated with the contract from the local API. -func (b *ContractBackend) CodeAt(ctx context.Context, contract common.Address, blockNum *big.Int) ([]byte, error) { - return b.bcapi.GetCode(ctx, contract, toBlockNumber(blockNum)) -} - -// CodeAt retrieves any code associated with the contract from the local API. -func (b *ContractBackend) PendingCodeAt(ctx context.Context, contract common.Address) ([]byte, error) { - return b.bcapi.GetCode(ctx, contract, rpc.PendingBlockNumber) -} - -// ContractCall implements bind.ContractCaller executing an Ethereum contract -// call with the specified data as the input. The pending flag requests execution -// against the pending block, not the stable head of the chain. -func (b *ContractBackend) CallContract(ctx context.Context, msg ethereum.CallMsg, blockNum *big.Int) ([]byte, error) { - out, err := b.bcapi.Call(ctx, toCallArgs(msg), toBlockNumber(blockNum)) - return out, err -} - -// ContractCall implements bind.ContractCaller executing an Ethereum contract -// call with the specified data as the input. The pending flag requests execution -// against the pending block, not the stable head of the chain. -func (b *ContractBackend) PendingCallContract(ctx context.Context, msg ethereum.CallMsg) ([]byte, error) { - out, err := b.bcapi.Call(ctx, toCallArgs(msg), rpc.PendingBlockNumber) - return out, err -} - -func toCallArgs(msg ethereum.CallMsg) ethapi.CallArgs { - args := ethapi.CallArgs{ - To: msg.To, - From: msg.From, - Data: msg.Data, - Gas: hexutil.Uint64(msg.Gas), - } - if msg.GasPrice != nil { - args.GasPrice = hexutil.Big(*msg.GasPrice) - } - if msg.Value != nil { - args.Value = hexutil.Big(*msg.Value) - } - return args -} - -func toBlockNumber(num *big.Int) rpc.BlockNumber { - if num == nil { - return rpc.LatestBlockNumber - } - return rpc.BlockNumber(num.Int64()) -} - -// PendingAccountNonce implements bind.ContractTransactor retrieving the current -// pending nonce associated with an account. -func (b *ContractBackend) PendingNonceAt(ctx context.Context, account common.Address) (nonce uint64, err error) { - out, err := b.txapi.GetTransactionCount(ctx, account, rpc.PendingBlockNumber) - if out != nil { - nonce = uint64(*out) - } - return nonce, err -} - -// SuggestGasPrice implements bind.ContractTransactor retrieving the currently -// suggested gas price to allow a timely execution of a transaction. -func (b *ContractBackend) SuggestGasPrice(ctx context.Context) (*big.Int, error) { - return b.eapi.GasPrice(ctx) -} - -// EstimateGasLimit implements bind.ContractTransactor triing 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. -func (b *ContractBackend) EstimateGas(ctx context.Context, msg ethereum.CallMsg) (uint64, error) { - gas, err := b.bcapi.EstimateGas(ctx, toCallArgs(msg)) - return uint64(gas), err -} - -// SendTransaction implements bind.ContractTransactor injects the transaction -// into the pending pool for execution. -func (b *ContractBackend) SendTransaction(ctx context.Context, tx *types.Transaction) error { - raw, _ := rlp.EncodeToBytes(tx) - _, err := b.txapi.SendRawTransaction(ctx, raw) - return err -} |