forked from cerc-io/plugeth
1e556d220c
* all: remove notion of trusted checkpoints in the post-merge world * light: remove unused function * eth/ethconfig, les: remove unused config option * les: make linter happy --------- Co-authored-by: Gary Rong <garyrong0905@gmail.com>
57 lines
2.0 KiB
Go
57 lines
2.0 KiB
Go
// Copyright 2016 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 les
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import (
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/les/downloader"
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"github.com/ethereum/go-ethereum/log"
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)
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// synchronise tries to sync up our local chain with a remote peer.
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func (h *clientHandler) synchronise(peer *serverPeer) {
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// Short circuit if the peer is nil.
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if peer == nil {
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return
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}
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// Make sure the peer's TD is higher than our own.
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latest := h.backend.blockchain.CurrentHeader()
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currentTd := rawdb.ReadTd(h.backend.chainDb, latest.Hash(), latest.Number.Uint64())
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if currentTd != nil && peer.Td().Cmp(currentTd) < 0 {
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return
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}
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// Notify testing framework if syncing has completed (for testing purpose).
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defer func() {
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if h.syncEnd != nil {
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h.syncEnd(h.backend.blockchain.CurrentHeader())
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}
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}()
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start := time.Now()
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if h.syncStart != nil {
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h.syncStart(h.backend.blockchain.CurrentHeader())
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}
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// Fetch the remaining block headers based on the current chain header.
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if err := h.downloader.Synchronise(peer.id, peer.Head(), peer.Td(), downloader.LightSync); err != nil {
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log.Debug("Synchronise failed", "reason", err)
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return
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}
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log.Debug("Synchronise finished", "elapsed", common.PrettyDuration(time.Since(start)))
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}
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