c213fd1fd8
There is no need to depend on the old context package now that the minimum Go version is 1.7. The move to "context" eliminates our weird vendoring setup. Some vendored code still uses golang.org/x/net/context and it is now vendored in the normal way. This change triggered new vet checks around context.WithTimeout which didn't fire with golang.org/x/net/context.
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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"context"
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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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)
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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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