eth/tracers/live: add sleeper

eth/tracers/live/sleep.go

@@ -0,0 +1,117 @@
+// Copyright 2024 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 live
+
+import (
+	"encoding/json"
+	"math/big"
+
+	"fmt"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/tracing"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/eth/tracers"
+	"github.com/ethereum/go-ethereum/params"
+	"time"
+)
+
+func init() {
+	tracers.LiveDirectory.Register("sleep", newSleeperTracer)
+}
+
+// sleeper is a no-op live tracer. It's there to
+// catch changes in the tracing interface, as well as
+// for testing live tracing performance. Can be removed
+// as soon as we have a real live tracer.
+type sleeper struct{}
+
+func newSleeperTracer(_ json.RawMessage) (*tracing.Hooks, error) {
+	t := &sleeper{}
+	return &tracing.Hooks{
+		OnTxStart:        t.OnTxStart,
+		OnTxEnd:          t.OnTxEnd,
+		OnEnter:          t.OnEnter,
+		OnExit:           t.OnExit,
+		OnOpcode:         t.OnOpcode,
+		OnFault:          t.OnFault,
+		OnGasChange:      t.OnGasChange,
+		OnBlockchainInit: t.OnBlockchainInit,
+		OnBlockStart:     t.OnBlockStart,
+		OnBlockEnd:       t.OnBlockEnd,
+		OnSkippedBlock:   t.OnSkippedBlock,
+		OnGenesisBlock:   t.OnGenesisBlock,
+		OnBalanceChange:  t.OnBalanceChange,
+		OnNonceChange:    t.OnNonceChange,
+		OnCodeChange:     t.OnCodeChange,
+		OnStorageChange:  t.OnStorageChange,
+		OnLog:            t.OnLog,
+	}, nil
+}
+
+func (t *sleeper) OnOpcode(pc uint64, op byte, gas, cost uint64, scope tracing.OpContext, rData []byte, depth int, err error) {
+}
+
+func (t *sleeper) OnFault(pc uint64, op byte, gas, cost uint64, _ tracing.OpContext, depth int, err error) {
+}
+
+func (t *sleeper) OnEnter(depth int, typ byte, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
+}
+
+func (t *sleeper) OnExit(depth int, output []byte, gasUsed uint64, err error, reverted bool) {
+}
+
+func (t *sleeper) OnTxStart(vm *tracing.VMContext, tx *types.Transaction, from common.Address) {
+}
+
+func (t *sleeper) OnTxEnd(receipt *types.Receipt, err error) {
+}
+
+func (t *sleeper) OnBlockStart(ev tracing.BlockEvent) {
+	fmt.Printf("sleeper going to sleep for 30 minutes\n")
+	time.Sleep(30 * time.Minute)
+	fmt.Printf("sleeper waking up\n")
+}
+
+func (t *sleeper) OnBlockEnd(err error) {
+}
+
+func (t *sleeper) OnSkippedBlock(ev tracing.BlockEvent) {}
+
+func (t *sleeper) OnBlockchainInit(chainConfig *params.ChainConfig) {
+}
+
+func (t *sleeper) OnGenesisBlock(b *types.Block, alloc types.GenesisAlloc) {
+}
+
+func (t *sleeper) OnBalanceChange(a common.Address, prev, new *big.Int, reason tracing.BalanceChangeReason) {
+}
+
+func (t *sleeper) OnNonceChange(a common.Address, prev, new uint64) {
+}
+
+func (t *sleeper) OnCodeChange(a common.Address, prevCodeHash common.Hash, prev []byte, codeHash common.Hash, code []byte) {
+}
+
+func (t *sleeper) OnStorageChange(a common.Address, k, prev, new common.Hash) {
+}
+
+func (t *sleeper) OnLog(l *types.Log) {
+
+}
+
+func (t *sleeper) OnGasChange(old, new uint64, reason tracing.GasChangeReason) {
+}