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- // Copyright 2016 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"
- "time"
- "github.com/ethereum/go-ethereum/common"
- "github.com/ethereum/go-ethereum/core/types"
- "github.com/ethereum/go-ethereum/log"
- )
- // WaitMined waits for tx to be mined on the blockchain.
- // It stops waiting when the context is canceled.
- func WaitMined(ctx context.Context, b DeployBackend, tx *types.Transaction) (*types.Receipt, error) {
- queryTicker := time.NewTicker(time.Second)
- defer queryTicker.Stop()
- logger := log.New("hash", tx.Hash())
- for {
- receipt, err := b.TransactionReceipt(ctx, tx.Hash())
- if receipt != nil {
- return receipt, nil
- }
- if err != nil {
- logger.Trace("Receipt retrieval failed", "err", err)
- } else {
- logger.Trace("Transaction not yet mined")
- }
- // Wait for the next round.
- select {
- case <-ctx.Done():
- return nil, ctx.Err()
- case <-queryTicker.C:
- }
- }
- }
- // WaitDeployed waits for a contract deployment transaction and returns the on-chain
- // contract address when it is mined. It stops waiting when ctx is canceled.
- func WaitDeployed(ctx context.Context, b DeployBackend, tx *types.Transaction) (common.Address, error) {
- if tx.To() != nil {
- return common.Address{}, errors.New("tx is not contract creation")
- }
- receipt, err := WaitMined(ctx, b, tx)
- if err != nil {
- return common.Address{}, err
- }
- if receipt.ContractAddress == (common.Address{}) {
- return common.Address{}, errors.New("zero address")
- }
- // Check that code has indeed been deployed at the address.
- // This matters on pre-Homestead chains: OOG in the constructor
- // could leave an empty account behind.
- code, err := b.CodeAt(ctx, receipt.ContractAddress, nil)
- if err == nil && len(code) == 0 {
- err = ErrNoCodeAfterDeploy
- }
- return receipt.ContractAddress, err
- }
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