plugeth/eth/catalyst/tester.go

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// Copyright 2022 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 catalyst
import (
"sync"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/node"
)
// FullSyncTester is an auxiliary service that allows Geth to perform full sync
// alone without consensus-layer attached. Users must specify a valid block hash
// as the sync target.
//
// This tester can be applied to different networks, no matter it's pre-merge or
// post-merge, but only for full-sync.
type FullSyncTester struct {
stack *node.Node
backend *eth.Ethereum
target common.Hash
closed chan struct{}
wg sync.WaitGroup
}
// RegisterFullSyncTester registers the full-sync tester service into the node
// stack for launching and stopping the service controlled by node.
func RegisterFullSyncTester(stack *node.Node, backend *eth.Ethereum, target common.Hash) (*FullSyncTester, error) {
cl := &FullSyncTester{
stack: stack,
backend: backend,
target: target,
closed: make(chan struct{}),
}
stack.RegisterLifecycle(cl)
return cl, nil
}
// Start launches the beacon sync with provided sync target.
func (tester *FullSyncTester) Start() error {
tester.wg.Add(1)
go func() {
defer tester.wg.Done()
// Trigger beacon sync with the provided block hash as trusted
// chain head.
err := tester.backend.Downloader().BeaconDevSync(downloader.FullSync, tester.target, tester.closed)
if err != nil {
log.Info("Failed to trigger beacon sync", "err", err)
}
ticker := time.NewTicker(time.Second * 5)
defer ticker.Stop()
for {
select {
case <-ticker.C:
// Stop in case the target block is already stored locally.
if block := tester.backend.BlockChain().GetBlockByHash(tester.target); block != nil {
log.Info("Full-sync target reached", "number", block.NumberU64(), "hash", block.Hash())
go tester.stack.Close() // async since we need to close ourselves
return
}
case <-tester.closed:
return
}
}
}()
return nil
}
// Stop stops the full-sync tester to stop all background activities.
// This function can only be called for one time.
func (tester *FullSyncTester) Stop() error {
close(tester.closed)
tester.wg.Wait()
return nil
}