// Copyright 2017 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 . package tracers import ( "context" "crypto/ecdsa" "crypto/rand" "encoding/json" "io/ioutil" "math/big" "path/filepath" "reflect" "strings" "testing" "github.com/holiman/uint256" "github.com/ledgerwatch/turbo-geth/common" "github.com/ledgerwatch/turbo-geth/common/hexutil" "github.com/ledgerwatch/turbo-geth/common/math" "github.com/ledgerwatch/turbo-geth/common/u256" "github.com/ledgerwatch/turbo-geth/core" "github.com/ledgerwatch/turbo-geth/core/types" "github.com/ledgerwatch/turbo-geth/core/vm" "github.com/ledgerwatch/turbo-geth/crypto" "github.com/ledgerwatch/turbo-geth/ethdb" "github.com/ledgerwatch/turbo-geth/params" "github.com/ledgerwatch/turbo-geth/rlp" "github.com/ledgerwatch/turbo-geth/tests" ) // To generate a new callTracer test, copy paste the makeTest method below into // a Geth console and call it with a transaction hash you which to export. /* // makeTest generates a callTracer test by running a prestate reassembled and a // call trace run, assembling all the gathered information into a test case. var makeTest = function(tx, rewind) { // Generate the genesis block from the block, transaction and prestate data var block = eth.getBlock(eth.getTransaction(tx).blockHash); var genesis = eth.getBlock(block.parentHash); delete genesis.gasUsed; delete genesis.logsBloom; delete genesis.parentHash; delete genesis.receiptsRoot; delete genesis.sha3Uncles; delete genesis.size; delete genesis.transactions; delete genesis.transactionsRoot; delete genesis.uncles; genesis.gasLimit = genesis.gasLimit.toString(); genesis.number = genesis.number.toString(); genesis.timestamp = genesis.timestamp.toString(); genesis.alloc = debug.traceTransaction(tx, {tracer: "prestateTracer", rewind: rewind}); for (var key in genesis.alloc) { genesis.alloc[key].nonce = genesis.alloc[key].nonce.toString(); } genesis.config = admin.nodeInfo.protocols.eth.config; // Generate the call trace and produce the test input var result = debug.traceTransaction(tx, {tracer: "callTracer", rewind: rewind}); delete result.time; console.log(JSON.stringify({ genesis: genesis, context: { number: block.number.toString(), difficulty: block.difficulty, timestamp: block.timestamp.toString(), gasLimit: block.gasLimit.toString(), miner: block.miner, }, input: eth.getRawTransaction(tx), result: result, }, null, 2)); } */ // callTrace is the result of a callTracer run. type callTrace struct { Type string `json:"type"` From common.Address `json:"from"` To common.Address `json:"to"` Input hexutil.Bytes `json:"input"` Output hexutil.Bytes `json:"output"` Gas *hexutil.Uint64 `json:"gas,omitempty"` GasUsed *hexutil.Uint64 `json:"gasUsed,omitempty"` Value *hexutil.Big `json:"value,omitempty"` Error string `json:"error,omitempty"` Calls []callTrace `json:"calls,omitempty"` } type callContext struct { Number math.HexOrDecimal64 `json:"number"` Difficulty *math.HexOrDecimal256 `json:"difficulty"` Time math.HexOrDecimal64 `json:"timestamp"` GasLimit math.HexOrDecimal64 `json:"gasLimit"` Miner common.Address `json:"miner"` } // callTracerTest defines a single test to check the call tracer against. type callTracerTest struct { Genesis *core.Genesis `json:"genesis"` Context *callContext `json:"context"` Input string `json:"input"` Result *callTrace `json:"result"` } func TestPrestateTracerCreate2(t *testing.T) { unsignedTx := types.NewTransaction(1, common.HexToAddress("0x00000000000000000000000000000000deadbeef"), new(uint256.Int), 5000000, u256.Num1, []byte{}) privateKeyECDSA, err := ecdsa.GenerateKey(crypto.S256(), rand.Reader) if err != nil { t.Fatalf("err %v", err) } signer := types.NewEIP155Signer(big.NewInt(1)) tx, err := types.SignTx(unsignedTx, signer, privateKeyECDSA) if err != nil { t.Fatalf("err %v", err) } /** This comes from one of the test-vectors on the Skinny Create2 - EIP address 0x00000000000000000000000000000000deadbeef salt 0x00000000000000000000000000000000000000000000000000000000cafebabe init_code 0xdeadbeef gas (assuming no mem expansion): 32006 result: 0x60f3f640a8508fC6a86d45DF051962668E1e8AC7 */ origin, _ := signer.Sender(tx) evmContext := vm.Context{ CanTransfer: core.CanTransfer, Transfer: core.Transfer, Origin: origin, Coinbase: common.Address{}, BlockNumber: new(big.Int).SetUint64(8000000), Time: new(big.Int).SetUint64(5), Difficulty: big.NewInt(0x30000), GasLimit: uint64(6000000), GasPrice: big.NewInt(1), } alloc := core.GenesisAlloc{} // The code pushes 'deadbeef' into memory, then the other params, and calls CREATE2, then returns // the address alloc[common.HexToAddress("0x00000000000000000000000000000000deadbeef")] = core.GenesisAccount{ Nonce: 1, Code: hexutil.MustDecode("0x63deadbeef60005263cafebabe6004601c6000F560005260206000F3"), Balance: big.NewInt(1), } alloc[origin] = core.GenesisAccount{ Nonce: 1, Code: []byte{}, Balance: big.NewInt(500000000000000), } ctx := params.MainnetChainConfig.WithEIPsFlags(context.Background(), big.NewInt(1)) db := ethdb.NewMemDatabase() defer db.Close() statedb, _, err := tests.MakePreState(ctx, db, alloc, 0) if err != nil { t.Errorf("Could not make prestate: %v", err) } // Create the tracer, the EVM environment and run it tracer, err := New("prestateTracer") if err != nil { t.Fatalf("failed to create call tracer: %v", err) } evm := vm.NewEVM(evmContext, statedb, params.MainnetChainConfig, vm.Config{Debug: true, Tracer: tracer}) msg, err := tx.AsMessage(signer) if err != nil { t.Fatalf("failed to prepare transaction for tracing: %v", err) } st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas())) if _, err = st.TransitionDb(); err != nil { t.Fatalf("failed to execute transaction: %v", err) } // Retrieve the trace result and compare against the etalon res, err := tracer.GetResult() if err != nil { t.Fatalf("failed to retrieve trace result: %v", err) } ret := make(map[string]interface{}) if err := json.Unmarshal(res, &ret); err != nil { t.Fatalf("failed to unmarshal trace result: %v", err) } if _, has := ret["0x60f3f640a8508fc6a86d45df051962668e1e8ac7"]; !has { t.Fatalf("Expected 0x60f3f640a8508fc6a86d45df051962668e1e8ac7 in result") } } // Iterates over all the input-output datasets in the tracer test harness and // runs the JavaScript tracers against them. func TestCallTracer(t *testing.T) { files, err := ioutil.ReadDir("testdata") if err != nil { t.Fatalf("failed to retrieve tracer test suite: %v", err) } for _, file := range files { if !strings.HasPrefix(file.Name(), "call_tracer_") { continue } file := file // capture range variable t.Run(camel(strings.TrimSuffix(strings.TrimPrefix(file.Name(), "call_tracer_"), ".json")), func(t *testing.T) { t.Parallel() // Call tracer test found, read if from disk blob, err := ioutil.ReadFile(filepath.Join("testdata", file.Name())) if err != nil { t.Fatalf("failed to read testcase: %v", err) } test := new(callTracerTest) if err := json.Unmarshal(blob, test); err != nil { t.Fatalf("failed to parse testcase: %v", err) } // Configure a blockchain with the given prestate tx := new(types.Transaction) if err := rlp.DecodeBytes(common.FromHex(test.Input), tx); err != nil { t.Fatalf("failed to parse testcase input: %v", err) } signer := types.MakeSigner(test.Genesis.Config, new(big.Int).SetUint64(uint64(test.Context.Number))) origin, _ := signer.Sender(tx) evmContext := vm.Context{ CanTransfer: core.CanTransfer, Transfer: core.Transfer, Origin: origin, Coinbase: test.Context.Miner, BlockNumber: new(big.Int).SetUint64(uint64(test.Context.Number)), Time: new(big.Int).SetUint64(uint64(test.Context.Time)), Difficulty: (*big.Int)(test.Context.Difficulty), GasLimit: uint64(test.Context.GasLimit), GasPrice: tx.GasPrice().ToBig(), } db := ethdb.NewMemDatabase() defer db.Close() ctx := test.Genesis.Config.WithEIPsFlags(context.Background(), big.NewInt(1)) statedb, _, err := tests.MakePreState(ctx, db, test.Genesis.Alloc, 0) if err != nil { t.Errorf("Could not make prestate: %v", err) } // Create the tracer, the EVM environment and run it tracer, err := New("callTracer") if err != nil { t.Fatalf("failed to create call tracer: %v", err) } evm := vm.NewEVM(evmContext, statedb, test.Genesis.Config, vm.Config{Debug: true, Tracer: tracer}) msg, err := tx.AsMessage(signer) if err != nil { t.Fatalf("failed to prepare transaction for tracing: %v", err) } st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas())) if _, err = st.TransitionDb(); err != nil { t.Fatalf("failed to execute transaction: %v", err) } // Retrieve the trace result and compare against the etalon res, err := tracer.GetResult() if err != nil { t.Fatalf("failed to retrieve trace result: %v", err) } ret := new(callTrace) if err := json.Unmarshal(res, ret); err != nil { t.Fatalf("failed to unmarshal trace result: %v", err) } if !reflect.DeepEqual(ret, test.Result) { t.Fatalf("trace mismatch: \nhave %+v\nwant %+v", ret, test.Result) } }) } }