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authorDeterminant <[email protected]>2020-06-28 14:47:41 -0400
committerDeterminant <[email protected]>2020-06-28 14:47:41 -0400
commitd235e2c6a5788ec4a6cff15a16f56b38a3876a0d (patch)
tree5f2727f7a50ee5840f889c82776d3a30a88dd59b /core/vm/logger_json.go
parent13ebd8bd9468e9d769d598b0ca2afb72ba78cb97 (diff)
...
Diffstat (limited to 'core/vm/logger_json.go')
-rw-r--r--core/vm/logger_json.go87
1 files changed, 87 insertions, 0 deletions
diff --git a/core/vm/logger_json.go b/core/vm/logger_json.go
new file mode 100644
index 0000000..5068343
--- /dev/null
+++ b/core/vm/logger_json.go
@@ -0,0 +1,87 @@
+// 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 vm
+
+import (
+ "encoding/json"
+ "io"
+ "math/big"
+ "time"
+
+ "github.com/ava-labs/go-ethereum/common"
+ "github.com/ava-labs/go-ethereum/common/math"
+)
+
+type JSONLogger struct {
+ encoder *json.Encoder
+ cfg *LogConfig
+}
+
+// NewJSONLogger creates a new EVM tracer that prints execution steps as JSON objects
+// into the provided stream.
+func NewJSONLogger(cfg *LogConfig, writer io.Writer) *JSONLogger {
+ l := &JSONLogger{json.NewEncoder(writer), cfg}
+ if l.cfg == nil {
+ l.cfg = &LogConfig{}
+ }
+ return l
+}
+
+func (l *JSONLogger) CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error {
+ return nil
+}
+
+// CaptureState outputs state information on the logger.
+func (l *JSONLogger) CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint64, memory *Memory, stack *Stack, contract *Contract, depth int, err error) error {
+ log := StructLog{
+ Pc: pc,
+ Op: op,
+ Gas: gas,
+ GasCost: cost,
+ MemorySize: memory.Len(),
+ Storage: nil,
+ Depth: depth,
+ RefundCounter: env.StateDB.GetRefund(),
+ Err: err,
+ }
+ if !l.cfg.DisableMemory {
+ log.Memory = memory.Data()
+ }
+ if !l.cfg.DisableStack {
+ log.Stack = stack.Data()
+ }
+ return l.encoder.Encode(log)
+}
+
+// CaptureFault outputs state information on the logger.
+func (l *JSONLogger) CaptureFault(env *EVM, pc uint64, op OpCode, gas, cost uint64, memory *Memory, stack *Stack, contract *Contract, depth int, err error) error {
+ 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"`
+ }
+ if err != nil {
+ return l.encoder.Encode(endLog{common.Bytes2Hex(output), math.HexOrDecimal64(gasUsed), t, err.Error()})
+ }
+ return l.encoder.Encode(endLog{common.Bytes2Hex(output), math.HexOrDecimal64(gasUsed), t, ""})
+}