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logger_json.go
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logger_json.go
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// 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 <http://www.gnu.org/licenses/>.
package logger
import (
"encoding/json"
"github.com/holiman/uint256"
"io"
"math/big"
"time"
"github.com/anduschain/go-anduschain/common"
"github.com/anduschain/go-anduschain/common/math"
"github.com/anduschain/go-anduschain/core/vm"
)
type JSONLogger struct {
encoder *json.Encoder
cfg *Config
env *vm.EVM
}
// NewJSONLogger creates a new EVM tracer that prints execution steps as JSON objects
// into the provided stream.
func NewJSONLogger(cfg *Config, writer io.Writer) *JSONLogger {
l := &JSONLogger{encoder: json.NewEncoder(writer), cfg: cfg}
if l.cfg == nil {
l.cfg = &Config{}
}
return l
}
func (l *JSONLogger) CaptureStart(env *vm.EVM, from, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error {
return nil
}
func (l *JSONLogger) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas uint64, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error {
// TODO: Add rData to this interface as s
return l.CaptureState(env, pc, op, gas, cost, memory, stack, nil, depth, err)
}
// CaptureState outputs state information on the logger.
func (l *JSONLogger) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error {
log := StructLog{
Pc: pc,
Op: op,
Gas: gas,
GasCost: cost,
MemorySize: memory.Len(),
Depth: depth,
RefundCounter: l.env.StateDB.GetRefund(),
Err: err,
}
if l.cfg.EnableMemory {
log.Memory = memory.Data()
}
if !l.cfg.DisableStack {
var stackData []uint256.Int
stackData = make([]uint256.Int, len(stack.Data()))
for i, item := range stack.Data() {
xx, _ := uint256.FromBig(item)
stackData[i] = *xx
}
log.Stack = stackData
}
l.encoder.Encode(log)
return nil
}
// CaptureEnd is triggered at end of execution.
func (l *JSONLogger) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error {
type endLog struct {
Output string `json:"output"`
GasUsed math.HexOrDecimal64 `json:"gasUsed"`
Time time.Duration `json:"time"`
Err string `json:"error,omitempty"`
}
var errMsg string
if err != nil {
errMsg = err.Error()
}
l.encoder.Encode(endLog{common.Bytes2Hex(output), math.HexOrDecimal64(gasUsed), t, errMsg})
return nil
}
func (l *JSONLogger) CaptureEnter(env *vm.EVM, typ vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) error {
return nil
}
func (l *JSONLogger) CaptureExit(output []byte, gasUsed uint64, err error) error { return nil }