forked from cerc-io/plugeth
86de2e516e
This PR allows users to pass in a config object directly to the tracers. Previously only the struct logger was configurable. It also adds an option to the call tracer which if enabled makes it ignore any subcall and collect only information about the top-level call. See #25419 for discussion. The tracers will silently ignore if they are passed a config they don't care about.
79 lines
2.9 KiB
Go
79 lines
2.9 KiB
Go
// 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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