Adding erc7562_tracer_test.go

Fixing marshaling

eth/tracers/internal/tracetest/erc7562_tracer_test.go

@@ -0,0 +1,166 @@
+// Copyright 2021 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 tracetest
+
+import (
+	"encoding/json"
+	"github.com/holiman/uint256"
+	"math/big"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/rawdb"
+	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/core/vm"
+	"github.com/ethereum/go-ethereum/eth/tracers"
+	"github.com/ethereum/go-ethereum/tests"
+)
+
+type accessedSlots struct {
+	Reads           map[string][]string `json:"reads"`
+	Writes          map[string]uint64   `json:"writes"`
+	TransientReads  map[string]uint64   `json:"transientReads"`
+	TransientWrites map[string]uint64   `json:"transientWrites"`
+}
+
+type opcodeWithPartialStack struct {
+	Opcode        vm.OpCode
+	StackTopItems []uint256.Int
+}
+
+type contractSizeWithOpcode struct {
+	ContractSize int       `json:"contractSize"`
+	Opcode       vm.OpCode `json:"opcode"`
+}
+
+// callFrameWithOpcodes is the result of a erc7562Tracer run.
+type callFrameWithOpcodes struct {
+	From             common.Address  `json:"from"`
+	Gas              uint64          `json:"gas"`
+	GasUsed          uint64          `json:"gasUsed"`
+	To               *common.Address `json:"to,omitempty" rlp:"optional"`
+	Input            []byte          `json:"input" rlp:"optional"`
+	Output           []byte          `json:"output,omitempty" rlp:"optional"`
+	Error            string          `json:"error,omitempty" rlp:"optional"`
+	RevertReason     string          `json:"revertReason,omitempty"`
+	Logs             []callLog       `json:"logs,omitempty" rlp:"optional"`
+	Value            *big.Int        `json:"value,omitempty" rlp:"optional"`
+	revertedSnapshot bool
+
+	AccessedSlots     accessedSlots                              `json:"accessedSlots"`
+	ExtCodeAccessInfo []common.Address                           `json:"extCodeAccessInfo"`
+	UsedOpcodes       map[vm.OpCode]uint64                       `json:"usedOpcodes"`
+	ContractSize      map[common.Address]*contractSizeWithOpcode `json:"contractSize"`
+	OutOfGas          bool                                       `json:"outOfGas"`
+	Calls             []callFrameWithOpcodes                     `json:"calls,omitempty" rlp:"optional"`
+}
+
+// erc7562TracerTest defines a single test to check the erc7562 tracer against.
+type erc7562TracerTest struct {
+	Genesis      *core.Genesis         `json:"genesis"`
+	Context      *callContext          `json:"context"`
+	Input        string                `json:"input"`
+	TracerConfig json.RawMessage       `json:"tracerConfig"`
+	Result       *callFrameWithOpcodes `json:"result"`
+}
+
+func TestErc7562Tracer(t *testing.T) {
+	dirPath := "erc7562_tracer"
+	tracerName := "erc7562Tracer"
+	files, err := os.ReadDir(filepath.Join("testdata", dirPath))
+	if err != nil {
+		t.Fatalf("failed to retrieve tracer test suite: %v", err)
+	}
+	for _, file := range files {
+		if !strings.HasSuffix(file.Name(), ".json") {
+			continue
+		}
+		t.Run(camel(strings.TrimSuffix(file.Name(), ".json")), func(t *testing.T) {
+			t.Parallel()
+
+			var (
+				test = new(erc7562TracerTest)
+				tx   = new(types.Transaction)
+			)
+			// erc7562 tracer test found, read if from disk
+			if blob, err := os.ReadFile(filepath.Join("testdata", dirPath, file.Name())); err != nil {
+				t.Fatalf("failed to read testcase: %v", err)
+			} else if err := json.Unmarshal(blob, test); err != nil {
+				t.Fatalf("failed to parse testcase: %v", err)
+			}
+			if err := tx.UnmarshalBinary(common.FromHex(test.Input)); err != nil {
+				t.Fatalf("failed to parse testcase input: %v", err)
+			}
+			// Configure a blockchain with the given prestate
+			var (
+				signer  = types.MakeSigner(test.Genesis.Config, new(big.Int).SetUint64(uint64(test.Context.Number)), uint64(test.Context.Time))
+				context = test.Context.toBlockContext(test.Genesis)
+				st      = tests.MakePreState(rawdb.NewMemoryDatabase(), test.Genesis.Alloc, false, rawdb.HashScheme)
+			)
+			st.Close()
+
+			tracer, err := tracers.DefaultDirectory.New(tracerName, new(tracers.Context), test.TracerConfig, test.Genesis.Config)
+			if err != nil {
+				t.Fatalf("failed to create erc7562 tracer: %v", err)
+			}
+			logState := vm.StateDB(st.StateDB)
+			if tracer.Hooks != nil {
+				logState = state.NewHookedState(st.StateDB, tracer.Hooks)
+			}
+			msg, err := core.TransactionToMessage(tx, signer, context.BaseFee)
+			if err != nil {
+				t.Fatalf("failed to prepare transaction for tracing: %v", err)
+			}
+			evm := vm.NewEVM(context, logState, test.Genesis.Config, vm.Config{Tracer: tracer.Hooks})
+			tracer.OnTxStart(evm.GetVMContext(), tx, msg.From)
+			vmRet, err := core.ApplyMessage(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
+			if err != nil {
+				t.Fatalf("failed to execute transaction: %v", err)
+			}
+			tracer.OnTxEnd(&types.Receipt{GasUsed: vmRet.UsedGas}, nil)
+			// Retrieve the trace result and compare against the expected.
+			res, err := tracer.GetResult()
+			if err != nil {
+				t.Fatalf("failed to retrieve trace result: %v", err)
+			}
+			want, err := json.Marshal(test.Result)
+			if err != nil {
+				t.Fatalf("failed to marshal test: %v", err)
+			}
+			if string(want) != string(res) {
+				t.Fatalf("trace mismatch\n have: %v\n want: %v\n", string(res), string(want))
+			}
+			// Sanity check: compare top call's gas used against vm result
+			type simpleResult struct {
+				GasUsed hexutil.Uint64
+			}
+			var topCall simpleResult
+			if err := json.Unmarshal(res, &topCall); err != nil {
+				t.Fatalf("failed to unmarshal top calls gasUsed: %v", err)
+			}
+			if uint64(topCall.GasUsed) != vmRet.UsedGas {
+				t.Fatalf("top call has invalid gasUsed. have: %d want: %d", topCall.GasUsed, vmRet.UsedGas)
+			}
+		})
+	}
+}

eth/tracers/native/erc7562.go

@@ -109,12 +109,6 @@ type callFrameWithOpcodesMarshaling struct {
 	Value      *hexutil.Big
 	Input      hexutil.Bytes
 	Output     hexutil.Bytes
-	AccessedSlots     accessedSlots                              `json:"accessedSlots"`
-	ExtCodeAccessInfo []common.Address                           `json:"extCodeAccessInfo"`
-	UsedOpcodes       map[vm.OpCode]uint64                       `json:"usedOpcodes"`
-	ContractSize      map[common.Address]*contractSizeWithOpcode `json:"contractSize"`
-	OutOfGas          bool                                       `json:"outOfGas"`
-	Calls             []callFrameWithOpcodes                     `json:"calls,omitempty"`
 }
 
 type accessedSlots struct {