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487 lines
15 KiB
487 lines
15 KiB
// Copyright 2021 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 tracers
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import (
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"bytes"
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"context"
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"crypto/ecdsa"
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"errors"
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"fmt"
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"math/big"
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"reflect"
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"sort"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/internal/ethapi"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rpc"
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)
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var (
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errStateNotFound = errors.New("state not found")
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errBlockNotFound = errors.New("block not found")
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errTransactionNotFound = errors.New("transaction not found")
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)
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type testBackend struct {
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chainConfig *params.ChainConfig
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engine consensus.Engine
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chaindb ethdb.Database
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chain *core.BlockChain
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}
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func newTestBackend(t *testing.T, n int, gspec *core.Genesis, generator func(i int, b *core.BlockGen)) *testBackend {
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backend := &testBackend{
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chainConfig: params.TestChainConfig,
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engine: ethash.NewFaker(),
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chaindb: rawdb.NewMemoryDatabase(),
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}
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// Generate blocks for testing
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gspec.Config = backend.chainConfig
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var (
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gendb = rawdb.NewMemoryDatabase()
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genesis = gspec.MustCommit(gendb)
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)
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blocks, _ := core.GenerateChain(backend.chainConfig, genesis, backend.engine, gendb, n, generator)
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// Import the canonical chain
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gspec.MustCommit(backend.chaindb)
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cacheConfig := &core.CacheConfig{
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TrieCleanLimit: 256,
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TrieDirtyLimit: 256,
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TrieTimeLimit: 5 * time.Minute,
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SnapshotLimit: 0,
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TrieDirtyDisabled: true, // Archive mode
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}
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chain, err := core.NewBlockChain(backend.chaindb, cacheConfig, backend.chainConfig, backend.engine, vm.Config{}, nil, nil)
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if err != nil {
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t.Fatalf("failed to create tester chain: %v", err)
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}
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if n, err := chain.InsertChain(blocks); err != nil {
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t.Fatalf("block %d: failed to insert into chain: %v", n, err)
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}
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backend.chain = chain
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return backend
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}
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func (b *testBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
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return b.chain.GetHeaderByHash(hash), nil
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}
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func (b *testBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
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if number == rpc.PendingBlockNumber || number == rpc.LatestBlockNumber {
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return b.chain.CurrentHeader(), nil
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}
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return b.chain.GetHeaderByNumber(uint64(number)), nil
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}
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func (b *testBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
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return b.chain.GetBlockByHash(hash), nil
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}
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func (b *testBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
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if number == rpc.PendingBlockNumber || number == rpc.LatestBlockNumber {
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return b.chain.CurrentBlock(), nil
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}
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return b.chain.GetBlockByNumber(uint64(number)), nil
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}
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func (b *testBackend) GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error) {
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tx, hash, blockNumber, index := rawdb.ReadTransaction(b.chaindb, txHash)
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if tx == nil {
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return nil, common.Hash{}, 0, 0, errTransactionNotFound
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}
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return tx, hash, blockNumber, index, nil
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}
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func (b *testBackend) RPCGasCap() uint64 {
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return 25000000
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}
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func (b *testBackend) ChainConfig() *params.ChainConfig {
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return b.chainConfig
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}
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func (b *testBackend) Engine() consensus.Engine {
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return b.engine
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}
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func (b *testBackend) ChainDb() ethdb.Database {
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return b.chaindb
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}
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func (b *testBackend) StateAtBlock(ctx context.Context, block *types.Block, reexec uint64) (*state.StateDB, func(), error) {
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statedb, err := b.chain.StateAt(block.Root())
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if err != nil {
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return nil, nil, errStateNotFound
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}
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return statedb, func() {}, nil
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}
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func (b *testBackend) StateAtTransaction(ctx context.Context, block *types.Block, txIndex int, reexec uint64) (core.Message, vm.BlockContext, *state.StateDB, func(), error) {
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parent := b.chain.GetBlock(block.ParentHash(), block.NumberU64()-1)
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if parent == nil {
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return nil, vm.BlockContext{}, nil, nil, errBlockNotFound
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}
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statedb, err := b.chain.StateAt(parent.Root())
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if err != nil {
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return nil, vm.BlockContext{}, nil, nil, errStateNotFound
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}
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if txIndex == 0 && len(block.Transactions()) == 0 {
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return nil, vm.BlockContext{}, statedb, func() {}, nil
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}
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// Recompute transactions up to the target index.
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signer := types.MakeSigner(b.chainConfig, block.Number())
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for idx, tx := range block.Transactions() {
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msg, _ := tx.AsMessage(signer)
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txContext := core.NewEVMTxContext(msg)
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context := core.NewEVMBlockContext(block.Header(), b.chain, nil)
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if idx == txIndex {
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return msg, context, statedb, func() {}, nil
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}
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vmenv := vm.NewEVM(context, txContext, statedb, b.chainConfig, vm.Config{})
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if _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(tx.Gas())); err != nil {
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return nil, vm.BlockContext{}, nil, nil, fmt.Errorf("transaction %#x failed: %v", tx.Hash(), err)
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}
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statedb.Finalise(vmenv.ChainConfig().IsEIP158(block.Number()))
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}
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return nil, vm.BlockContext{}, nil, nil, fmt.Errorf("transaction index %d out of range for block %#x", txIndex, block.Hash())
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}
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func (b *testBackend) StatesInRange(ctx context.Context, fromBlock *types.Block, toBlock *types.Block, reexec uint64) ([]*state.StateDB, func(), error) {
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var result []*state.StateDB
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for number := fromBlock.NumberU64(); number <= toBlock.NumberU64(); number += 1 {
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block := b.chain.GetBlockByNumber(number)
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if block == nil {
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return nil, nil, errBlockNotFound
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}
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statedb, err := b.chain.StateAt(block.Root())
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if err != nil {
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return nil, nil, errStateNotFound
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}
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result = append(result, statedb)
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}
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return result, func() {}, nil
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}
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func TestTraceCall(t *testing.T) {
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t.Parallel()
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// Initialize test accounts
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accounts := newAccounts(3)
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genesis := &core.Genesis{Alloc: core.GenesisAlloc{
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accounts[0].addr: {Balance: big.NewInt(params.Ether)},
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accounts[1].addr: {Balance: big.NewInt(params.Ether)},
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accounts[2].addr: {Balance: big.NewInt(params.Ether)},
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}}
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genBlocks := 10
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signer := types.HomesteadSigner{}
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api := NewAPI(newTestBackend(t, genBlocks, genesis, func(i int, b *core.BlockGen) {
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// Transfer from account[0] to account[1]
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// value: 1000 wei
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// fee: 0 wei
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tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, big.NewInt(0), nil), signer, accounts[0].key)
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b.AddTx(tx)
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}))
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var testSuite = []struct {
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blockNumber rpc.BlockNumber
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call ethapi.CallArgs
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config *TraceConfig
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expectErr error
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expect interface{}
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}{
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// Standard JSON trace upon the genesis, plain transfer.
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{
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blockNumber: rpc.BlockNumber(0),
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call: ethapi.CallArgs{
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From: &accounts[0].addr,
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To: &accounts[1].addr,
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Value: (*hexutil.Big)(big.NewInt(1000)),
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},
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config: nil,
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expectErr: nil,
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expect: ðapi.ExecutionResult{
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Gas: params.TxGas,
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Failed: false,
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ReturnValue: "",
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StructLogs: []ethapi.StructLogRes{},
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},
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},
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// Standard JSON trace upon the head, plain transfer.
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{
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blockNumber: rpc.BlockNumber(genBlocks),
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call: ethapi.CallArgs{
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From: &accounts[0].addr,
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To: &accounts[1].addr,
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Value: (*hexutil.Big)(big.NewInt(1000)),
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},
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config: nil,
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expectErr: nil,
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expect: ðapi.ExecutionResult{
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Gas: params.TxGas,
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Failed: false,
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ReturnValue: "",
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StructLogs: []ethapi.StructLogRes{},
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},
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},
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// Standard JSON trace upon the non-existent block, error expects
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{
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blockNumber: rpc.BlockNumber(genBlocks + 1),
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call: ethapi.CallArgs{
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From: &accounts[0].addr,
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To: &accounts[1].addr,
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Value: (*hexutil.Big)(big.NewInt(1000)),
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},
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config: nil,
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expectErr: fmt.Errorf("block #%d not found", genBlocks+1),
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expect: nil,
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},
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// Standard JSON trace upon the latest block
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{
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blockNumber: rpc.LatestBlockNumber,
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call: ethapi.CallArgs{
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From: &accounts[0].addr,
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To: &accounts[1].addr,
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Value: (*hexutil.Big)(big.NewInt(1000)),
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},
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config: nil,
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expectErr: nil,
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expect: ðapi.ExecutionResult{
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Gas: params.TxGas,
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Failed: false,
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ReturnValue: "",
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StructLogs: []ethapi.StructLogRes{},
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},
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},
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// Standard JSON trace upon the pending block
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{
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blockNumber: rpc.PendingBlockNumber,
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call: ethapi.CallArgs{
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From: &accounts[0].addr,
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To: &accounts[1].addr,
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Value: (*hexutil.Big)(big.NewInt(1000)),
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},
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config: nil,
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expectErr: nil,
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expect: ðapi.ExecutionResult{
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Gas: params.TxGas,
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Failed: false,
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ReturnValue: "",
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StructLogs: []ethapi.StructLogRes{},
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},
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},
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}
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for _, testspec := range testSuite {
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result, err := api.TraceCall(context.Background(), testspec.call, rpc.BlockNumberOrHash{BlockNumber: &testspec.blockNumber}, testspec.config)
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if testspec.expectErr != nil {
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if err == nil {
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t.Errorf("Expect error %v, get nothing", testspec.expectErr)
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continue
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}
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if !reflect.DeepEqual(err, testspec.expectErr) {
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t.Errorf("Error mismatch, want %v, get %v", testspec.expectErr, err)
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}
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} else {
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if err != nil {
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t.Errorf("Expect no error, get %v", err)
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continue
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}
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if !reflect.DeepEqual(result, testspec.expect) {
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t.Errorf("Result mismatch, want %v, get %v", testspec.expect, result)
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}
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}
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}
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}
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func TestTraceTransaction(t *testing.T) {
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t.Parallel()
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// Initialize test accounts
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accounts := newAccounts(2)
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genesis := &core.Genesis{Alloc: core.GenesisAlloc{
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accounts[0].addr: {Balance: big.NewInt(params.Ether)},
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accounts[1].addr: {Balance: big.NewInt(params.Ether)},
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}}
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target := common.Hash{}
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signer := types.HomesteadSigner{}
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api := NewAPI(newTestBackend(t, 1, genesis, func(i int, b *core.BlockGen) {
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// Transfer from account[0] to account[1]
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// value: 1000 wei
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// fee: 0 wei
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tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, big.NewInt(0), nil), signer, accounts[0].key)
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b.AddTx(tx)
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target = tx.Hash()
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}))
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result, err := api.TraceTransaction(context.Background(), target, nil)
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if err != nil {
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t.Errorf("Failed to trace transaction %v", err)
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}
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if !reflect.DeepEqual(result, ðapi.ExecutionResult{
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Gas: params.TxGas,
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Failed: false,
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ReturnValue: "",
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StructLogs: []ethapi.StructLogRes{},
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}) {
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t.Error("Transaction tracing result is different")
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}
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}
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func TestTraceBlock(t *testing.T) {
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t.Parallel()
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// Initialize test accounts
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accounts := newAccounts(3)
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genesis := &core.Genesis{Alloc: core.GenesisAlloc{
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accounts[0].addr: {Balance: big.NewInt(params.Ether)},
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accounts[1].addr: {Balance: big.NewInt(params.Ether)},
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accounts[2].addr: {Balance: big.NewInt(params.Ether)},
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}}
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genBlocks := 10
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signer := types.HomesteadSigner{}
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api := NewAPI(newTestBackend(t, genBlocks, genesis, func(i int, b *core.BlockGen) {
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// Transfer from account[0] to account[1]
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// value: 1000 wei
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// fee: 0 wei
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tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, big.NewInt(0), nil), signer, accounts[0].key)
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b.AddTx(tx)
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}))
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var testSuite = []struct {
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blockNumber rpc.BlockNumber
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config *TraceConfig
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expect interface{}
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expectErr error
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}{
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// Trace genesis block, expect error
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{
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blockNumber: rpc.BlockNumber(0),
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config: nil,
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expect: nil,
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expectErr: errors.New("genesis is not traceable"),
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},
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// Trace head block
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{
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blockNumber: rpc.BlockNumber(genBlocks),
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config: nil,
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expectErr: nil,
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expect: []*txTraceResult{
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{
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Result: ðapi.ExecutionResult{
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Gas: params.TxGas,
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Failed: false,
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ReturnValue: "",
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StructLogs: []ethapi.StructLogRes{},
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},
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},
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},
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},
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// Trace non-existent block
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{
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blockNumber: rpc.BlockNumber(genBlocks + 1),
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config: nil,
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expectErr: fmt.Errorf("block #%d not found", genBlocks+1),
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expect: nil,
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},
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// Trace latest block
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{
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blockNumber: rpc.LatestBlockNumber,
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config: nil,
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expectErr: nil,
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expect: []*txTraceResult{
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{
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Result: ðapi.ExecutionResult{
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Gas: params.TxGas,
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Failed: false,
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ReturnValue: "",
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StructLogs: []ethapi.StructLogRes{},
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},
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},
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},
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},
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// Trace pending block
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{
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blockNumber: rpc.PendingBlockNumber,
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config: nil,
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expectErr: nil,
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expect: []*txTraceResult{
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{
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Result: ðapi.ExecutionResult{
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Gas: params.TxGas,
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Failed: false,
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ReturnValue: "",
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StructLogs: []ethapi.StructLogRes{},
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},
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},
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},
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},
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}
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for _, testspec := range testSuite {
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result, err := api.TraceBlockByNumber(context.Background(), testspec.blockNumber, testspec.config)
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if testspec.expectErr != nil {
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if err == nil {
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t.Errorf("Expect error %v, get nothing", testspec.expectErr)
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continue
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}
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if !reflect.DeepEqual(err, testspec.expectErr) {
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t.Errorf("Error mismatch, want %v, get %v", testspec.expectErr, err)
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}
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} else {
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if err != nil {
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t.Errorf("Expect no error, get %v", err)
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continue
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}
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if !reflect.DeepEqual(result, testspec.expect) {
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t.Errorf("Result mismatch, want %v, get %v", testspec.expect, result)
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}
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}
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}
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}
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type Account struct {
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key *ecdsa.PrivateKey
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addr common.Address
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}
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type Accounts []Account
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func (a Accounts) Len() int { return len(a) }
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func (a Accounts) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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func (a Accounts) Less(i, j int) bool { return bytes.Compare(a[i].addr.Bytes(), a[j].addr.Bytes()) < 0 }
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func newAccounts(n int) (accounts Accounts) {
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for i := 0; i < n; i++ {
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key, _ := crypto.GenerateKey()
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addr := crypto.PubkeyToAddress(key.PublicKey)
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accounts = append(accounts, Account{key: key, addr: addr})
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}
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sort.Sort(accounts)
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return accounts
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}
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