c97df052a9
The need for these functions comes up in code that actually deploys and uses contracts. As of this commit, they can be used with both SimulatedBackend and ethclient. SimulatedBackend gains some additional methods in the process and is now safe for concurrent use.
77 lines
2.6 KiB
Go
77 lines
2.6 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/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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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(1 * time.Second)
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defer queryTicker.Stop()
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loghash := tx.Hash().Hex()[:8]
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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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glog.V(logger.Detail).Infof("tx %x error: %v", loghash, err)
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} else {
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glog.V(logger.Detail).Infof("tx %x not yet mined...", loghash)
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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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