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78 lines
2.9 KiB
78 lines
2.9 KiB
// Copyright 2021 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package native
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import (
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"encoding/json"
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"math/big"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/eth/tracers"
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)
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func init() {
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register("noopTracer", newNoopTracer)
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}
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// noopTracer is a go implementation of the Tracer interface which
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// performs no action. It's mostly useful for testing purposes.
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type noopTracer struct{}
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// newNoopTracer returns a new noop tracer.
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func newNoopTracer(ctx *tracers.Context, _ json.RawMessage) (tracers.Tracer, error) {
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return &noopTracer{}, nil
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}
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// CaptureStart implements the EVMLogger interface to initialize the tracing operation.
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func (t *noopTracer) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
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}
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// CaptureEnd is called after the call finishes to finalize the tracing.
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func (t *noopTracer) CaptureEnd(output []byte, gasUsed uint64, _ time.Duration, err error) {
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}
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// CaptureState implements the EVMLogger interface to trace a single step of VM execution.
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func (t *noopTracer) CaptureState(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
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}
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// CaptureFault implements the EVMLogger interface to trace an execution fault.
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func (t *noopTracer) CaptureFault(pc uint64, op vm.OpCode, gas, cost uint64, _ *vm.ScopeContext, depth int, err error) {
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}
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// CaptureEnter is called when EVM enters a new scope (via call, create or selfdestruct).
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func (t *noopTracer) CaptureEnter(typ vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
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}
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// CaptureExit is called when EVM exits a scope, even if the scope didn't
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// execute any code.
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func (t *noopTracer) CaptureExit(output []byte, gasUsed uint64, err error) {
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}
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func (*noopTracer) CaptureTxStart(gasLimit uint64) {}
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func (*noopTracer) CaptureTxEnd(restGas uint64) {}
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// GetResult returns an empty json object.
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func (t *noopTracer) GetResult() (json.RawMessage, error) {
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return json.RawMessage(`{}`), nil
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}
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// Stop terminates execution of the tracer at the first opportune moment.
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func (t *noopTracer) Stop(err error) {
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}
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