77 lines
2.5 KiB
Go
77 lines
2.5 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package bind
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import (
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"fmt"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/log"
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"golang.org/x/net/context"
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)
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// WaitMined waits for tx to be mined on the blockchain.
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// It stops waiting when the context is canceled.
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func WaitMined(ctx context.Context, b DeployBackend, tx *types.Transaction) (*types.Receipt, error) {
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queryTicker := time.NewTicker(time.Second)
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defer queryTicker.Stop()
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logger := log.New("hash", tx.Hash())
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for {
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receipt, err := b.TransactionReceipt(ctx, tx.Hash())
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if receipt != nil {
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return receipt, nil
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}
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if err != nil {
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logger.Trace("Receipt retrieval failed", "err", err)
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} else {
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logger.Trace("Transaction not yet mined")
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}
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// Wait for the next round.
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select {
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case <-ctx.Done():
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return nil, ctx.Err()
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case <-queryTicker.C:
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}
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}
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}
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// WaitDeployed waits for a contract deployment transaction and returns the on-chain
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// contract address when it is mined. It stops waiting when ctx is canceled.
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func WaitDeployed(ctx context.Context, b DeployBackend, tx *types.Transaction) (common.Address, error) {
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if tx.To() != nil {
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return common.Address{}, fmt.Errorf("tx is not contract creation")
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}
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receipt, err := WaitMined(ctx, b, tx)
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if err != nil {
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return common.Address{}, err
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}
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if receipt.ContractAddress == (common.Address{}) {
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return common.Address{}, fmt.Errorf("zero address")
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}
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// Check that code has indeed been deployed at the address.
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// This matters on pre-Homestead chains: OOG in the constructor
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// could leave an empty account behind.
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code, err := b.CodeAt(ctx, receipt.ContractAddress, nil)
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if err == nil && len(code) == 0 {
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err = ErrNoCodeAfterDeploy
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}
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return receipt.ContractAddress, err
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}
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