github.com/arieschain/arieschain@v0.0.0-20191023063405-37c074544356/cmd/evm/json_logger.go (about)

     1  
     2  package main
     3  
     4  import (
     5  	"encoding/json"
     6  	"io"
     7  	"math/big"
     8  	"time"
     9  
    10  	"github.com/quickchainproject/quickchain/common"
    11  	"github.com/quickchainproject/quickchain/common/math"
    12  	"github.com/quickchainproject/quickchain/core/vm"
    13  )
    14  
    15  type JSONLogger struct {
    16  	encoder *json.Encoder
    17  	cfg     *vm.LogConfig
    18  }
    19  
    20  func NewJSONLogger(cfg *vm.LogConfig, writer io.Writer) *JSONLogger {
    21  	return &JSONLogger{json.NewEncoder(writer), cfg}
    22  }
    23  
    24  func (l *JSONLogger) CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error {
    25  	return nil
    26  }
    27  
    28  // CaptureState outputs state information on the logger.
    29  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 {
    30  	log := vm.StructLog{
    31  		Pc:         pc,
    32  		Op:         op,
    33  		Gas:        gas,
    34  		GasCost:    cost,
    35  		MemorySize: memory.Len(),
    36  		Storage:    nil,
    37  		Depth:      depth,
    38  		Err:        err,
    39  	}
    40  	if !l.cfg.DisableMemory {
    41  		log.Memory = memory.Data()
    42  	}
    43  	if !l.cfg.DisableStack {
    44  		log.Stack = stack.Data()
    45  	}
    46  	return l.encoder.Encode(log)
    47  }
    48  
    49  // CaptureFault outputs state information on the logger.
    50  func (l *JSONLogger) CaptureFault(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 {
    51  	return nil
    52  }
    53  
    54  // CaptureEnd is triggered at end of execution.
    55  func (l *JSONLogger) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error {
    56  	type endLog struct {
    57  		Output  string              `json:"output"`
    58  		GasUsed math.HexOrDecimal64 `json:"gasUsed"`
    59  		Time    time.Duration       `json:"time"`
    60  		Err     string              `json:"error,omitempty"`
    61  	}
    62  	if err != nil {
    63  		return l.encoder.Encode(endLog{common.Bytes2Hex(output), math.HexOrDecimal64(gasUsed), t, err.Error()})
    64  	}
    65  	return l.encoder.Encode(endLog{common.Bytes2Hex(output), math.HexOrDecimal64(gasUsed), t, ""})
    66  }