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97 lines
3.1 KiB
97 lines
3.1 KiB
// Copyright 2022 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 catalyst
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import (
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"sync"
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"time"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/eth/downloader"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/node"
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)
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// FullSyncTester is an auxiliary service that allows Geth to perform full sync
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// alone without consensus-layer attached. Users must specify a valid block as
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// the sync target. This tester can be applied to different networks, no matter
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// it's pre-merge or post-merge, but only for full-sync.
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type FullSyncTester struct {
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api *ConsensusAPI
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block *types.Block
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closed chan struct{}
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wg sync.WaitGroup
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}
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// RegisterFullSyncTester registers the full-sync tester service into the node
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// stack for launching and stopping the service controlled by node.
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func RegisterFullSyncTester(stack *node.Node, backend *eth.Ethereum, block *types.Block) (*FullSyncTester, error) {
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cl := &FullSyncTester{
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api: NewConsensusAPI(backend),
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block: block,
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closed: make(chan struct{}),
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}
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stack.RegisterLifecycle(cl)
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return cl, nil
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}
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// Start launches the beacon sync with provided sync target.
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func (tester *FullSyncTester) Start() error {
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tester.wg.Add(1)
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go func() {
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defer tester.wg.Done()
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ticker := time.NewTicker(time.Second * 5)
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defer ticker.Stop()
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for {
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select {
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case <-ticker.C:
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// Don't bother downloader in case it's already syncing.
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if tester.api.eth.Downloader().Synchronising() {
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continue
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}
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// Short circuit in case the target block is already stored
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// locally. TODO(somehow terminate the node stack if target
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// is reached).
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if tester.api.eth.BlockChain().HasBlock(tester.block.Hash(), tester.block.NumberU64()) {
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log.Info("Full-sync target reached", "number", tester.block.NumberU64(), "hash", tester.block.Hash())
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return
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}
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// Trigger beacon sync with the provided block header as
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// trusted chain head.
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err := tester.api.eth.Downloader().BeaconSync(downloader.FullSync, tester.block.Header(), nil)
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if err != nil {
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log.Info("Failed to beacon sync", "err", err)
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}
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case <-tester.closed:
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return
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}
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}
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}()
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return nil
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}
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// Stop stops the full-sync tester to stop all background activities.
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// This function can only be called for one time.
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func (tester *FullSyncTester) Stop() error {
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close(tester.closed)
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tester.wg.Wait()
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return nil
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}
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