plugeth/accounts/abi/bind/backends/simulated_test.go

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// Copyright 2019 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 backends
import (
"bytes"
"context"
"errors"
"math/big"
"strings"
"testing"
"time"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/params"
)
func TestSimulatedBackend(t *testing.T) {
var gasLimit uint64 = 8000029
key, _ := crypto.GenerateKey() // nolint: gosec
auth := bind.NewKeyedTransactor(key)
genAlloc := make(core.GenesisAlloc)
genAlloc[auth.From] = core.GenesisAccount{Balance: big.NewInt(9223372036854775807)}
sim := NewSimulatedBackend(genAlloc, gasLimit)
defer sim.Close()
// should return an error if the tx is not found
txHash := common.HexToHash("2")
_, isPending, err := sim.TransactionByHash(context.Background(), txHash)
if isPending {
t.Fatal("transaction should not be pending")
}
if err != ethereum.NotFound {
t.Fatalf("err should be `ethereum.NotFound` but received %v", err)
}
// generate a transaction and confirm you can retrieve it
code := `6060604052600a8060106000396000f360606040526008565b00`
var gas uint64 = 3000000
tx := types.NewContractCreation(0, big.NewInt(0), gas, big.NewInt(1), common.FromHex(code))
tx, _ = types.SignTx(tx, types.HomesteadSigner{}, key)
err = sim.SendTransaction(context.Background(), tx)
if err != nil {
t.Fatal("error sending transaction")
}
txHash = tx.Hash()
_, isPending, err = sim.TransactionByHash(context.Background(), txHash)
if err != nil {
t.Fatalf("error getting transaction with hash: %v", txHash.String())
}
if !isPending {
t.Fatal("transaction should have pending status")
}
sim.Commit()
_, isPending, err = sim.TransactionByHash(context.Background(), txHash)
if err != nil {
t.Fatalf("error getting transaction with hash: %v", txHash.String())
}
if isPending {
t.Fatal("transaction should not have pending status")
}
}
var testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
// the following is based on this contract:
// contract T {
// event received(address sender, uint amount, bytes memo);
// event receivedAddr(address sender);
//
// function receive(bytes calldata memo) external payable returns (string memory res) {
// emit received(msg.sender, msg.value, memo);
// emit receivedAddr(msg.sender);
// return "hello world";
// }
// }
const abiJSON = `[ { "constant": false, "inputs": [ { "name": "memo", "type": "bytes" } ], "name": "receive", "outputs": [ { "name": "res", "type": "string" } ], "payable": true, "stateMutability": "payable", "type": "function" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "sender", "type": "address" }, { "indexed": false, "name": "amount", "type": "uint256" }, { "indexed": false, "name": "memo", "type": "bytes" } ], "name": "received", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "sender", "type": "address" } ], "name": "receivedAddr", "type": "event" } ]`
const abiBin = `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`
const deployedCode = `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`
// expected return value contains "hello world"
var expectedReturn = []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
func TestNewSimulatedBackend(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
expectedBal := big.NewInt(10000000000)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: expectedBal},
}, 10000000,
)
defer sim.Close()
if sim.config != params.AllEthashProtocolChanges {
t.Errorf("expected sim config to equal params.AllEthashProtocolChanges, got %v", sim.config)
}
if sim.blockchain.Config() != params.AllEthashProtocolChanges {
t.Errorf("expected sim blockchain config to equal params.AllEthashProtocolChanges, got %v", sim.config)
}
statedb, _ := sim.blockchain.State()
bal := statedb.GetBalance(testAddr)
if bal.Cmp(expectedBal) != 0 {
t.Errorf("expected balance for test address not received. expected: %v actual: %v", expectedBal, bal)
}
}
func TestSimulatedBackend_AdjustTime(t *testing.T) {
sim := NewSimulatedBackend(
core.GenesisAlloc{}, 10000000,
)
defer sim.Close()
prevTime := sim.pendingBlock.Time()
err := sim.AdjustTime(time.Second)
if err != nil {
t.Error(err)
}
newTime := sim.pendingBlock.Time()
if newTime-prevTime != uint64(time.Second.Seconds()) {
t.Errorf("adjusted time not equal to a second. prev: %v, new: %v", prevTime, newTime)
}
}
func TestSimulatedBackend_BalanceAt(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
expectedBal := big.NewInt(10000000000)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: expectedBal},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
bal, err := sim.BalanceAt(bgCtx, testAddr, nil)
if err != nil {
t.Error(err)
}
if bal.Cmp(expectedBal) != 0 {
t.Errorf("expected balance for test address not received. expected: %v actual: %v", expectedBal, bal)
}
}
func TestSimulatedBackend_BlockByHash(t *testing.T) {
sim := NewSimulatedBackend(
core.GenesisAlloc{}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
block, err := sim.BlockByNumber(bgCtx, nil)
if err != nil {
t.Errorf("could not get recent block: %v", err)
}
blockByHash, err := sim.BlockByHash(bgCtx, block.Hash())
if err != nil {
t.Errorf("could not get recent block: %v", err)
}
if block.Hash() != blockByHash.Hash() {
t.Errorf("did not get expected block")
}
}
func TestSimulatedBackend_BlockByNumber(t *testing.T) {
sim := NewSimulatedBackend(
core.GenesisAlloc{}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
block, err := sim.BlockByNumber(bgCtx, nil)
if err != nil {
t.Errorf("could not get recent block: %v", err)
}
if block.NumberU64() != 0 {
t.Errorf("did not get most recent block, instead got block number %v", block.NumberU64())
}
// create one block
sim.Commit()
block, err = sim.BlockByNumber(bgCtx, nil)
if err != nil {
t.Errorf("could not get recent block: %v", err)
}
if block.NumberU64() != 1 {
t.Errorf("did not get most recent block, instead got block number %v", block.NumberU64())
}
blockByNumber, err := sim.BlockByNumber(bgCtx, big.NewInt(1))
if err != nil {
t.Errorf("could not get block by number: %v", err)
}
if blockByNumber.Hash() != block.Hash() {
t.Errorf("did not get the same block with height of 1 as before")
}
}
func TestSimulatedBackend_NonceAt(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
nonce, err := sim.NonceAt(bgCtx, testAddr, big.NewInt(0))
if err != nil {
t.Errorf("could not get nonce for test addr: %v", err)
}
if nonce != uint64(0) {
t.Errorf("received incorrect nonce. expected 0, got %v", nonce)
}
// create a signed transaction to send
tx := types.NewTransaction(nonce, testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
}
// send tx to simulated backend
err = sim.SendTransaction(bgCtx, signedTx)
if err != nil {
t.Errorf("could not add tx to pending block: %v", err)
}
sim.Commit()
newNonce, err := sim.NonceAt(bgCtx, testAddr, big.NewInt(1))
if err != nil {
t.Errorf("could not get nonce for test addr: %v", err)
}
if newNonce != nonce+uint64(1) {
t.Errorf("received incorrect nonce. expected 1, got %v", nonce)
}
// create some more blocks
sim.Commit()
// Check that we can get data for an older block/state
newNonce, err = sim.NonceAt(bgCtx, testAddr, big.NewInt(1))
if err != nil {
t.Fatalf("could not get nonce for test addr: %v", err)
}
if newNonce != nonce+uint64(1) {
t.Fatalf("received incorrect nonce. expected 1, got %v", nonce)
}
}
func TestSimulatedBackend_SendTransaction(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
}
// send tx to simulated backend
err = sim.SendTransaction(bgCtx, signedTx)
if err != nil {
t.Errorf("could not add tx to pending block: %v", err)
}
sim.Commit()
block, err := sim.BlockByNumber(bgCtx, big.NewInt(1))
if err != nil {
t.Errorf("could not get block at height 1: %v", err)
}
if signedTx.Hash() != block.Transactions()[0].Hash() {
t.Errorf("did not commit sent transaction. expected hash %v got hash %v", block.Transactions()[0].Hash(), signedTx.Hash())
}
}
func TestSimulatedBackend_TransactionByHash(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
}
// send tx to simulated backend
err = sim.SendTransaction(bgCtx, signedTx)
if err != nil {
t.Errorf("could not add tx to pending block: %v", err)
}
// ensure tx is committed pending
receivedTx, pending, err := sim.TransactionByHash(bgCtx, signedTx.Hash())
if err != nil {
t.Errorf("could not get transaction by hash %v: %v", signedTx.Hash(), err)
}
if !pending {
t.Errorf("expected transaction to be in pending state")
}
if receivedTx.Hash() != signedTx.Hash() {
t.Errorf("did not received committed transaction. expected hash %v got hash %v", signedTx.Hash(), receivedTx.Hash())
}
sim.Commit()
// ensure tx is not and committed pending
receivedTx, pending, err = sim.TransactionByHash(bgCtx, signedTx.Hash())
if err != nil {
t.Errorf("could not get transaction by hash %v: %v", signedTx.Hash(), err)
}
if pending {
t.Errorf("expected transaction to not be in pending state")
}
if receivedTx.Hash() != signedTx.Hash() {
t.Errorf("did not received committed transaction. expected hash %v got hash %v", signedTx.Hash(), receivedTx.Hash())
}
}
func TestSimulatedBackend_EstimateGas(t *testing.T) {
/*
pragma solidity ^0.6.4;
contract GasEstimation {
function PureRevert() public { revert(); }
function Revert() public { revert("revert reason");}
function OOG() public { for (uint i = 0; ; i++) {}}
function Assert() public { assert(false);}
function Valid() public {}
}*/
const contractAbi = "[{\"inputs\":[],\"name\":\"Assert\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"OOG\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"PureRevert\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"Revert\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"Valid\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
const contractBin = "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"
key, _ := crypto.GenerateKey()
addr := crypto.PubkeyToAddress(key.PublicKey)
opts := bind.NewKeyedTransactor(key)
sim := NewSimulatedBackend(core.GenesisAlloc{addr: {Balance: big.NewInt(params.Ether)}}, 10000000)
defer sim.Close()
parsed, _ := abi.JSON(strings.NewReader(contractAbi))
contractAddr, _, _, _ := bind.DeployContract(opts, parsed, common.FromHex(contractBin), sim)
sim.Commit()
var cases = []struct {
name string
message ethereum.CallMsg
expect uint64
expectError error
}{
{"plain transfer(valid)", ethereum.CallMsg{
From: addr,
To: &addr,
Gas: 0,
GasPrice: big.NewInt(0),
Value: big.NewInt(1),
Data: nil,
}, params.TxGas, nil},
{"plain transfer(invalid)", ethereum.CallMsg{
From: addr,
To: &contractAddr,
Gas: 0,
GasPrice: big.NewInt(0),
Value: big.NewInt(1),
Data: nil,
}, 0, errors.New("always failing transaction (execution reverted)")},
{"Revert", ethereum.CallMsg{
From: addr,
To: &contractAddr,
Gas: 0,
GasPrice: big.NewInt(0),
Value: nil,
Data: common.Hex2Bytes("d8b98391"),
}, 0, errors.New("always failing transaction (execution reverted) (revert reason)")},
{"PureRevert", ethereum.CallMsg{
From: addr,
To: &contractAddr,
Gas: 0,
GasPrice: big.NewInt(0),
Value: nil,
Data: common.Hex2Bytes("aa8b1d30"),
}, 0, errors.New("always failing transaction (execution reverted)")},
{"OOG", ethereum.CallMsg{
From: addr,
To: &contractAddr,
Gas: 100000,
GasPrice: big.NewInt(0),
Value: nil,
Data: common.Hex2Bytes("50f6fe34"),
}, 0, errors.New("gas required exceeds allowance (100000)")},
{"Assert", ethereum.CallMsg{
From: addr,
To: &contractAddr,
Gas: 100000,
GasPrice: big.NewInt(0),
Value: nil,
Data: common.Hex2Bytes("b9b046f9"),
}, 0, errors.New("always failing transaction (invalid opcode: opcode 0xfe not defined)")},
{"Valid", ethereum.CallMsg{
From: addr,
To: &contractAddr,
Gas: 100000,
GasPrice: big.NewInt(0),
Value: nil,
Data: common.Hex2Bytes("e09fface"),
}, 21275, nil},
}
for _, c := range cases {
got, err := sim.EstimateGas(context.Background(), c.message)
if c.expectError != nil {
if err == nil {
t.Fatalf("Expect error, got nil")
}
if c.expectError.Error() != err.Error() {
t.Fatalf("Expect error, want %v, got %v", c.expectError, err)
}
continue
}
if got != c.expect {
t.Fatalf("Gas estimation mismatch, want %d, got %d", c.expect, got)
}
}
}
func TestSimulatedBackend_EstimateGasWithPrice(t *testing.T) {
key, _ := crypto.GenerateKey()
addr := crypto.PubkeyToAddress(key.PublicKey)
sim := NewSimulatedBackend(core.GenesisAlloc{addr: {Balance: big.NewInt(params.Ether*2 + 2e17)}}, 10000000)
defer sim.Close()
receipant := common.HexToAddress("deadbeef")
var cases = []struct {
name string
message ethereum.CallMsg
expect uint64
expectError error
}{
{"EstimateWithoutPrice", ethereum.CallMsg{
From: addr,
To: &receipant,
Gas: 0,
GasPrice: big.NewInt(0),
Value: big.NewInt(1000),
Data: nil,
}, 21000, nil},
{"EstimateWithPrice", ethereum.CallMsg{
From: addr,
To: &receipant,
Gas: 0,
GasPrice: big.NewInt(1000),
Value: big.NewInt(1000),
Data: nil,
}, 21000, nil},
{"EstimateWithVeryHighPrice", ethereum.CallMsg{
From: addr,
To: &receipant,
Gas: 0,
GasPrice: big.NewInt(1e14), // gascost = 2.1ether
Value: big.NewInt(1e17), // the remaining balance for fee is 2.1ether
Data: nil,
}, 21000, nil},
{"EstimateWithSuperhighPrice", ethereum.CallMsg{
From: addr,
To: &receipant,
Gas: 0,
GasPrice: big.NewInt(2e14), // gascost = 4.2ether
Value: big.NewInt(1000),
Data: nil,
}, 21000, errors.New("gas required exceeds allowance (10999)")}, // 10999=(2.2ether-1000wei)/(2e14)
}
for _, c := range cases {
got, err := sim.EstimateGas(context.Background(), c.message)
if c.expectError != nil {
if err == nil {
t.Fatalf("Expect error, got nil")
}
if c.expectError.Error() != err.Error() {
t.Fatalf("Expect error, want %v, got %v", c.expectError, err)
}
continue
}
if got != c.expect {
t.Fatalf("Gas estimation mismatch, want %d, got %d", c.expect, got)
}
}
}
func TestSimulatedBackend_HeaderByHash(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
header, err := sim.HeaderByNumber(bgCtx, nil)
if err != nil {
t.Errorf("could not get recent block: %v", err)
}
headerByHash, err := sim.HeaderByHash(bgCtx, header.Hash())
if err != nil {
t.Errorf("could not get recent block: %v", err)
}
if header.Hash() != headerByHash.Hash() {
t.Errorf("did not get expected block")
}
}
func TestSimulatedBackend_HeaderByNumber(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
latestBlockHeader, err := sim.HeaderByNumber(bgCtx, nil)
if err != nil {
t.Errorf("could not get header for tip of chain: %v", err)
}
if latestBlockHeader == nil {
t.Errorf("received a nil block header")
}
if latestBlockHeader.Number.Uint64() != uint64(0) {
t.Errorf("expected block header number 0, instead got %v", latestBlockHeader.Number.Uint64())
}
sim.Commit()
latestBlockHeader, err = sim.HeaderByNumber(bgCtx, nil)
if err != nil {
t.Errorf("could not get header for blockheight of 1: %v", err)
}
blockHeader, err := sim.HeaderByNumber(bgCtx, big.NewInt(1))
if err != nil {
t.Errorf("could not get header for blockheight of 1: %v", err)
}
if blockHeader.Hash() != latestBlockHeader.Hash() {
t.Errorf("block header and latest block header are not the same")
}
if blockHeader.Number.Int64() != int64(1) {
t.Errorf("did not get blockheader for block 1. instead got block %v", blockHeader.Number.Int64())
}
block, err := sim.BlockByNumber(bgCtx, big.NewInt(1))
if err != nil {
t.Errorf("could not get block for blockheight of 1: %v", err)
}
if block.Hash() != blockHeader.Hash() {
t.Errorf("block hash and block header hash do not match. expected %v, got %v", block.Hash(), blockHeader.Hash())
}
}
func TestSimulatedBackend_TransactionCount(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
currentBlock, err := sim.BlockByNumber(bgCtx, nil)
if err != nil || currentBlock == nil {
t.Error("could not get current block")
}
count, err := sim.TransactionCount(bgCtx, currentBlock.Hash())
if err != nil {
t.Error("could not get current block's transaction count")
}
if count != 0 {
t.Errorf("expected transaction count of %v does not match actual count of %v", 0, count)
}
// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
}
// send tx to simulated backend
err = sim.SendTransaction(bgCtx, signedTx)
if err != nil {
t.Errorf("could not add tx to pending block: %v", err)
}
sim.Commit()
lastBlock, err := sim.BlockByNumber(bgCtx, nil)
if err != nil {
t.Errorf("could not get header for tip of chain: %v", err)
}
count, err = sim.TransactionCount(bgCtx, lastBlock.Hash())
if err != nil {
t.Error("could not get current block's transaction count")
}
if count != 1 {
t.Errorf("expected transaction count of %v does not match actual count of %v", 1, count)
}
}
func TestSimulatedBackend_TransactionInBlock(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
transaction, err := sim.TransactionInBlock(bgCtx, sim.pendingBlock.Hash(), uint(0))
if err == nil && err != errTransactionDoesNotExist {
t.Errorf("expected a transaction does not exist error to be received but received %v", err)
}
if transaction != nil {
t.Errorf("expected transaction to be nil but received %v", transaction)
}
// expect pending nonce to be 0 since account has not been used
pendingNonce, err := sim.PendingNonceAt(bgCtx, testAddr)
if err != nil {
t.Errorf("did not get the pending nonce: %v", err)
}
if pendingNonce != uint64(0) {
t.Errorf("expected pending nonce of 0 got %v", pendingNonce)
}
// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
}
// send tx to simulated backend
err = sim.SendTransaction(bgCtx, signedTx)
if err != nil {
t.Errorf("could not add tx to pending block: %v", err)
}
sim.Commit()
lastBlock, err := sim.BlockByNumber(bgCtx, nil)
if err != nil {
t.Errorf("could not get header for tip of chain: %v", err)
}
transaction, err = sim.TransactionInBlock(bgCtx, lastBlock.Hash(), uint(1))
if err == nil && err != errTransactionDoesNotExist {
t.Errorf("expected a transaction does not exist error to be received but received %v", err)
}
if transaction != nil {
t.Errorf("expected transaction to be nil but received %v", transaction)
}
transaction, err = sim.TransactionInBlock(bgCtx, lastBlock.Hash(), uint(0))
if err != nil {
t.Errorf("could not get transaction in the lastest block with hash %v: %v", lastBlock.Hash().String(), err)
}
if signedTx.Hash().String() != transaction.Hash().String() {
t.Errorf("received transaction that did not match the sent transaction. expected hash %v, got hash %v", signedTx.Hash().String(), transaction.Hash().String())
}
}
func TestSimulatedBackend_PendingNonceAt(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
// expect pending nonce to be 0 since account has not been used
pendingNonce, err := sim.PendingNonceAt(bgCtx, testAddr)
if err != nil {
t.Errorf("did not get the pending nonce: %v", err)
}
if pendingNonce != uint64(0) {
t.Errorf("expected pending nonce of 0 got %v", pendingNonce)
}
// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
}
// send tx to simulated backend
err = sim.SendTransaction(bgCtx, signedTx)
if err != nil {
t.Errorf("could not add tx to pending block: %v", err)
}
// expect pending nonce to be 1 since account has submitted one transaction
pendingNonce, err = sim.PendingNonceAt(bgCtx, testAddr)
if err != nil {
t.Errorf("did not get the pending nonce: %v", err)
}
if pendingNonce != uint64(1) {
t.Errorf("expected pending nonce of 1 got %v", pendingNonce)
}
// make a new transaction with a nonce of 1
tx = types.NewTransaction(uint64(1), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
signedTx, err = types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
}
err = sim.SendTransaction(bgCtx, signedTx)
if err != nil {
t.Errorf("could not send tx: %v", err)
}
// expect pending nonce to be 2 since account now has two transactions
pendingNonce, err = sim.PendingNonceAt(bgCtx, testAddr)
if err != nil {
t.Errorf("did not get the pending nonce: %v", err)
}
if pendingNonce != uint64(2) {
t.Errorf("expected pending nonce of 2 got %v", pendingNonce)
}
}
func TestSimulatedBackend_TransactionReceipt(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()
// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
}
// send tx to simulated backend
err = sim.SendTransaction(bgCtx, signedTx)
if err != nil {
t.Errorf("could not add tx to pending block: %v", err)
}
sim.Commit()
receipt, err := sim.TransactionReceipt(bgCtx, signedTx.Hash())
if err != nil {
t.Errorf("could not get transaction receipt: %v", err)
}
if receipt.ContractAddress != testAddr && receipt.TxHash != signedTx.Hash() {
t.Errorf("received receipt is not correct: %v", receipt)
}
}
func TestSimulatedBackend_SuggestGasPrice(t *testing.T) {
sim := NewSimulatedBackend(
core.GenesisAlloc{},
10000000,
)
defer sim.Close()
bgCtx := context.Background()
gasPrice, err := sim.SuggestGasPrice(bgCtx)
if err != nil {
t.Errorf("could not get gas price: %v", err)
}
if gasPrice.Uint64() != uint64(1) {
t.Errorf("gas price was not expected value of 1. actual: %v", gasPrice.Uint64())
}
}
func TestSimulatedBackend_PendingCodeAt(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
},
10000000,
)
defer sim.Close()
bgCtx := context.Background()
code, err := sim.CodeAt(bgCtx, testAddr, nil)
if err != nil {
t.Errorf("could not get code at test addr: %v", err)
}
if len(code) != 0 {
t.Errorf("got code for account that does not have contract code")
}
parsed, err := abi.JSON(strings.NewReader(abiJSON))
if err != nil {
t.Errorf("could not get code at test addr: %v", err)
}
auth := bind.NewKeyedTransactor(testKey)
contractAddr, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(abiBin), sim)
if err != nil {
t.Errorf("could not deploy contract: %v tx: %v contract: %v", err, tx, contract)
}
code, err = sim.PendingCodeAt(bgCtx, contractAddr)
if err != nil {
t.Errorf("could not get code at test addr: %v", err)
}
if len(code) == 0 {
t.Errorf("did not get code for account that has contract code")
}
// ensure code received equals code deployed
if !bytes.Equal(code, common.FromHex(deployedCode)) {
t.Errorf("code received did not match expected deployed code:\n expected %v\n actual %v", common.FromHex(deployedCode), code)
}
}
func TestSimulatedBackend_CodeAt(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
},
10000000,
)
defer sim.Close()
bgCtx := context.Background()
code, err := sim.CodeAt(bgCtx, testAddr, nil)
if err != nil {
t.Errorf("could not get code at test addr: %v", err)
}
if len(code) != 0 {
t.Errorf("got code for account that does not have contract code")
}
parsed, err := abi.JSON(strings.NewReader(abiJSON))
if err != nil {
t.Errorf("could not get code at test addr: %v", err)
}
auth := bind.NewKeyedTransactor(testKey)
contractAddr, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(abiBin), sim)
if err != nil {
t.Errorf("could not deploy contract: %v tx: %v contract: %v", err, tx, contract)
}
sim.Commit()
code, err = sim.CodeAt(bgCtx, contractAddr, nil)
if err != nil {
t.Errorf("could not get code at test addr: %v", err)
}
if len(code) == 0 {
t.Errorf("did not get code for account that has contract code")
}
// ensure code received equals code deployed
if !bytes.Equal(code, common.FromHex(deployedCode)) {
t.Errorf("code received did not match expected deployed code:\n expected %v\n actual %v", common.FromHex(deployedCode), code)
}
}
// When receive("X") is called with sender 0x00... and value 1, it produces this tx receipt:
// receipt{status=1 cgas=23949 bloom=00000000004000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000040200000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 logs=[log: b6818c8064f645cd82d99b59a1a267d6d61117ef [75fd880d39c1daf53b6547ab6cb59451fc6452d27caa90e5b6649dd8293b9eed] 000000000000000000000000376c47978271565f56deb45495afa69e59c16ab200000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000158 9ae378b6d4409eada347a5dc0c180f186cb62dc68fcc0f043425eb917335aa28 0 95d429d309bb9d753954195fe2d69bd140b4ae731b9b5b605c34323de162cf00 0]}
func TestSimulatedBackend_PendingAndCallContract(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
},
10000000,
)
defer sim.Close()
bgCtx := context.Background()
parsed, err := abi.JSON(strings.NewReader(abiJSON))
if err != nil {
t.Errorf("could not get code at test addr: %v", err)
}
contractAuth := bind.NewKeyedTransactor(testKey)
addr, _, _, err := bind.DeployContract(contractAuth, parsed, common.FromHex(abiBin), sim)
if err != nil {
t.Errorf("could not deploy contract: %v", err)
}
input, err := parsed.Pack("receive", []byte("X"))
if err != nil {
t.Errorf("could pack receive function on contract: %v", err)
}
// make sure you can call the contract in pending state
res, err := sim.PendingCallContract(bgCtx, ethereum.CallMsg{
From: testAddr,
To: &addr,
Data: input,
})
if err != nil {
t.Errorf("could not call receive method on contract: %v", err)
}
if len(res) == 0 {
t.Errorf("result of contract call was empty: %v", res)
}
// while comparing against the byte array is more exact, also compare against the human readable string for readability
if !bytes.Equal(res, expectedReturn) || !strings.Contains(string(res), "hello world") {
t.Errorf("response from calling contract was expected to be 'hello world' instead received %v", string(res))
}
sim.Commit()
// make sure you can call the contract
res, err = sim.CallContract(bgCtx, ethereum.CallMsg{
From: testAddr,
To: &addr,
Data: input,
}, nil)
if err != nil {
t.Errorf("could not call receive method on contract: %v", err)
}
if len(res) == 0 {
t.Errorf("result of contract call was empty: %v", res)
}
if !bytes.Equal(res, expectedReturn) || !strings.Contains(string(res), "hello world") {
t.Errorf("response from calling contract was expected to be 'hello world' instead received %v", string(res))
}
}