mirror of
https://github.com/ethereum/go-ethereum.git
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110 lines
3.8 KiB
Go
Executable file
110 lines
3.8 KiB
Go
Executable file
// Copyright 2023 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 main
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import (
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"github.com/ethereum/go-ethereum/beacon/light/request"
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"github.com/ethereum/go-ethereum/beacon/light/sync"
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"github.com/ethereum/go-ethereum/beacon/types"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/lru"
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"github.com/protolambda/zrnt/eth2/beacon/capella"
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)
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// beaconBlockSync implements request.Module; it fetches the beacon blocks belonging
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// to the validated and prefetch heads.
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type beaconBlockSync struct {
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recentBlocks *lru.Cache[common.Hash, *capella.BeaconBlock]
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locked map[common.Hash]struct{}
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serverHeads map[request.Server]common.Hash
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headTracker headTracker
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lastHeadBlock *capella.BeaconBlock
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headBlockCh chan *capella.BeaconBlock
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}
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type headTracker interface {
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PrefetchHead() types.HeadInfo
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ValidatedHead() types.SignedHeader
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}
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// newBeaconBlockSync returns a new beaconBlockSync.
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func newBeaconBlockSync(headTracker headTracker) *beaconBlockSync {
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return &beaconBlockSync{
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headTracker: headTracker,
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recentBlocks: lru.NewCache[common.Hash, *capella.BeaconBlock](10),
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locked: make(map[common.Hash]struct{}),
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serverHeads: make(map[request.Server]common.Hash),
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headBlockCh: make(chan *capella.BeaconBlock, 1),
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}
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}
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func (s *beaconBlockSync) Process(events []request.Event) {
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for _, event := range events {
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switch event.Type {
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case request.EvRequest:
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_, req, _ := event.RequestInfo()
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blockRoot := common.Hash(req.(sync.ReqBeaconBlock))
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s.locked[blockRoot] = struct{}{}
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case request.EvResponse, request.EvFail, request.EvTimeout:
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_, req, resp := event.RequestInfo()
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blockRoot := common.Hash(req.(sync.ReqBeaconBlock))
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if resp != nil {
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block := resp.(*capella.BeaconBlock)
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s.recentBlocks.Add(blockRoot, block)
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}
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delete(s.locked, blockRoot)
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case sync.EvNewHead:
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s.serverHeads[event.Server] = event.Data.(types.HeadInfo).BlockRoot
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case request.EvUnregistered:
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delete(s.serverHeads, event.Server)
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}
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}
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// send validated head block
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if vh := s.headTracker.ValidatedHead(); vh != (types.SignedHeader{}) {
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validatedHead := vh.Header.Hash()
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if headBlock, ok := s.recentBlocks.Get(validatedHead); ok && headBlock != s.lastHeadBlock {
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select {
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case s.headBlockCh <- headBlock:
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s.lastHeadBlock = headBlock
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default:
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}
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}
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}
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}
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func (s *beaconBlockSync) MakeRequest(server request.Server) (request.Request, float32) {
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// request validated head block if unavailable and not yet requested
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if vh := s.headTracker.ValidatedHead(); vh != (types.SignedHeader{}) {
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validatedHead := vh.Header.Hash()
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if _, ok := s.recentBlocks.Get(validatedHead); !ok {
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if _, ok := s.locked[validatedHead]; !ok {
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return sync.ReqBeaconBlock(validatedHead), 1
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}
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}
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}
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// request prefetch head if the given server has announced it
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if prefetchHead := s.headTracker.PrefetchHead().BlockRoot; prefetchHead == s.serverHeads[server] {
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if _, ok := s.recentBlocks.Get(prefetchHead); !ok {
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if _, ok := s.locked[prefetchHead]; !ok {
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return sync.ReqBeaconBlock(prefetchHead), 0
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}
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}
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}
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return nil, 0
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}
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