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cmd, eth: implement full-sync tester (#26035)
This PR adds a parameter to startup, --synctarget. The synctarget flag is a developer-flag, that can be useful in some scenarios as a replacement for a CL node. It defines a fixed block sync target: geth --syncmode=full --synctarget=./block_15816882.hex_rlp The --synctarget is only made available during syncmode=full
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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/>. | ||
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| package catalyst | ||
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||
| import ( | ||
| "sync" | ||
| "time" | ||
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| "github.com/ethereum/go-ethereum/core/beacon" | ||
| "github.com/ethereum/go-ethereum/core/types" | ||
| "github.com/ethereum/go-ethereum/eth" | ||
| "github.com/ethereum/go-ethereum/log" | ||
| "github.com/ethereum/go-ethereum/node" | ||
| ) | ||
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| // FullSyncTester is an auxiliary service that allows Geth to perform full sync | ||
| // alone without consensus-layer attached. Users must specify a valid block 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 { | ||
| api *ConsensusAPI | ||
| block *types.Block | ||
| closed chan struct{} | ||
| wg sync.WaitGroup | ||
| } | ||
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| // 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, block *types.Block) (*FullSyncTester, error) { | ||
| cl := &FullSyncTester{ | ||
| api: NewConsensusAPI(backend), | ||
| block: block, | ||
| closed: make(chan struct{}), | ||
| } | ||
| stack.RegisterLifecycle(cl) | ||
| return cl, nil | ||
| } | ||
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| // Start launches the full-sync tester by spinning up a background thread | ||
| // for keeping firing NewPayload-UpdateForkChoice combos with the provided | ||
| // target block, it may or may not trigger the beacon sync depends on if | ||
| // there are protocol peers connected. | ||
| func (tester *FullSyncTester) Start() error { | ||
| tester.wg.Add(1) | ||
| go func() { | ||
| defer tester.wg.Done() | ||
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| ticker := time.NewTicker(time.Second * 5) | ||
| defer ticker.Stop() | ||
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| for { | ||
| select { | ||
| case <-ticker.C: | ||
| // Don't bother downloader in case it's already syncing. | ||
| if tester.api.eth.Downloader().Synchronising() { | ||
| continue | ||
| } | ||
| // Short circuit in case the target block is already stored | ||
| // locally. | ||
| if tester.api.eth.BlockChain().HasBlock(tester.block.Hash(), tester.block.NumberU64()) { | ||
| log.Info("Full-sync target reached", "number", tester.block.NumberU64(), "hash", tester.block.Hash()) | ||
| return | ||
| } | ||
| // Shoot out consensus events in order to trigger syncing. | ||
| data := beacon.BlockToExecutableData(tester.block) | ||
| tester.api.NewPayloadV1(*data) | ||
| tester.api.ForkchoiceUpdatedV1(beacon.ForkchoiceStateV1{ | ||
| HeadBlockHash: tester.block.Hash(), | ||
| SafeBlockHash: tester.block.Hash(), | ||
| FinalizedBlockHash: tester.block.Hash(), | ||
| }, nil) | ||
| case <-tester.closed: | ||
| return | ||
| } | ||
| } | ||
| }() | ||
| return nil | ||
| } | ||
|
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| // 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 | ||
| } |
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