plugeth/eth/tracers/native/noop.go
Sina Mahmoodi c5436c8eb7
eth/tracers: clean-up tracer collection (#24320)
* eth/tracers: clean-up tracer collection

* Rm test for dropped tracer
2022-02-01 10:44:44 +01:00

75 lines
2.7 KiB
Go

// 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 native
import (
"encoding/json"
"math/big"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/eth/tracers"
)
func init() {
register("noopTracer", newNoopTracer)
}
// noopTracer is a go implementation of the Tracer interface which
// performs no action. It's mostly useful for testing purposes.
type noopTracer struct{}
// newNoopTracer returns a new noop tracer.
func newNoopTracer() tracers.Tracer {
return &noopTracer{}
}
// CaptureStart implements the EVMLogger interface to initialize the tracing operation.
func (t *noopTracer) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
}
// CaptureEnd is called after the call finishes to finalize the tracing.
func (t *noopTracer) CaptureEnd(output []byte, gasUsed uint64, _ time.Duration, err error) {
}
// CaptureState implements the EVMLogger interface to trace a single step of VM execution.
func (t *noopTracer) CaptureState(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
}
// CaptureFault implements the EVMLogger interface to trace an execution fault.
func (t *noopTracer) CaptureFault(pc uint64, op vm.OpCode, gas, cost uint64, _ *vm.ScopeContext, depth int, err error) {
}
// CaptureEnter is called when EVM enters a new scope (via call, create or selfdestruct).
func (t *noopTracer) CaptureEnter(typ vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
}
// CaptureExit is called when EVM exits a scope, even if the scope didn't
// execute any code.
func (t *noopTracer) CaptureExit(output []byte, gasUsed uint64, err error) {
}
// GetResult returns an empty json object.
func (t *noopTracer) GetResult() (json.RawMessage, error) {
return json.RawMessage(`{}`), nil
}
// Stop terminates execution of the tracer at the first opportune moment.
func (t *noopTracer) Stop(err error) {
}