From d235e2c6a5788ec4a6cff15a16f56b38a3876a0d Mon Sep 17 00:00:00 2001
From: Determinant <tederminant@gmail.com>
Date: Sun, 28 Jun 2020 14:47:41 -0400
Subject: ...

---
 accounts/abi/bind/util.go | 76 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 accounts/abi/bind/util.go

(limited to 'accounts/abi/bind/util.go')

diff --git a/accounts/abi/bind/util.go b/accounts/abi/bind/util.go
new file mode 100644
index 0000000..b3ec22c
--- /dev/null
+++ b/accounts/abi/bind/util.go
@@ -0,0 +1,76 @@
+// 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"
+	"fmt"
+	"time"
+
+	"github.com/ava-labs/coreth/core/types"
+	"github.com/ava-labs/go-ethereum/common"
+	"github.com/ava-labs/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{}, fmt.Errorf("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{}, fmt.Errorf("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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