plugeth/eth/handler.go

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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
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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
// 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,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// 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 eth
import (
"errors"
"math"
"math/big"
"sync"
"sync/atomic"
"time"
"github.com/ethereum/go-ethereum/common"
all: core rework for the merge transition (#23761) * all: work for eth1/2 transtition * consensus/beacon, eth: change beacon difficulty to 0 * eth: updates * all: add terminalBlockDifficulty config, fix rebasing issues * eth: implemented merge interop spec * internal/ethapi: update to v1.0.0.alpha.2 This commit updates the code to the new spec, moving payloadId into it's own object. It also fixes an issue with finalizing an empty blockhash. It also properly sets the basefee * all: sync polishes, other fixes + refactors * core, eth: correct semantics for LeavePoW, EnterPoS * core: fixed rebasing artifacts * core: light: performance improvements * core: use keyed field (f) * core: eth: fix compilation issues + tests * eth/catalyst: dbetter error codes * all: move Merger to consensus/, remove reliance on it in bc * all: renamed EnterPoS and LeavePoW to ReachTDD and FinalizePoS * core: make mergelogs a function * core: use InsertChain instead of InsertBlock * les: drop merger from lightchain object * consensus: add merger * core: recoverAncestors in catalyst mode * core: fix nitpick * all: removed merger from beacon, use TTD, nitpicks * consensus: eth: add docstring, removed unnecessary code duplication * consensus/beacon: better comment * all: easy to fix nitpicks by karalabe * consensus/beacon: verify known headers to be sure * core: comments * core: eth: don't drop peers who advertise blocks, nitpicks * core: never add beacon blocks to the future queue * core: fixed nitpicks * consensus/beacon: simplify IsTTDReached check * consensus/beacon: correct IsTTDReached check Co-authored-by: rjl493456442 <garyrong0905@gmail.com> Co-authored-by: Péter Szilágyi <peterke@gmail.com>
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"github.com/ethereum/go-ethereum/consensus"
"github.com/ethereum/go-ethereum/consensus/beacon"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/forkid"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/eth/fetcher"
"github.com/ethereum/go-ethereum/eth/protocols/eth"
"github.com/ethereum/go-ethereum/eth/protocols/snap"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/params"
)
const (
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// txChanSize is the size of channel listening to NewTxsEvent.
// The number is referenced from the size of tx pool.
txChanSize = 4096
)
var (
syncChallengeTimeout = 15 * time.Second // Time allowance for a node to reply to the sync progress challenge
)
// txPool defines the methods needed from a transaction pool implementation to
// support all the operations needed by the Ethereum chain protocols.
type txPool interface {
// Has returns an indicator whether txpool has a transaction
// cached with the given hash.
Has(hash common.Hash) bool
// Get retrieves the transaction from local txpool with given
// tx hash.
Get(hash common.Hash) *types.Transaction
// AddRemotes should add the given transactions to the pool.
AddRemotes([]*types.Transaction) []error
// Pending should return pending transactions.
// The slice should be modifiable by the caller.
Pending(enforceTips bool) map[common.Address]types.Transactions
// SubscribeNewTxsEvent should return an event subscription of
// NewTxsEvent and send events to the given channel.
SubscribeNewTxsEvent(chan<- core.NewTxsEvent) event.Subscription
}
// handlerConfig is the collection of initialization parameters to create a full
// node network handler.
type handlerConfig struct {
Database ethdb.Database // Database for direct sync insertions
Chain *core.BlockChain // Blockchain to serve data from
TxPool txPool // Transaction pool to propagate from
Merger *consensus.Merger // The manager for eth1/2 transition
Network uint64 // Network identifier to adfvertise
Sync downloader.SyncMode // Whether to snap or full sync
BloomCache uint64 // Megabytes to alloc for snap sync bloom
EventMux *event.TypeMux // Legacy event mux, deprecate for `feed`
Checkpoint *params.TrustedCheckpoint // Hard coded checkpoint for sync challenges
RequiredBlocks map[uint64]common.Hash // Hard coded map of required block hashes for sync challenges
}
type handler struct {
networkID uint64
forkFilter forkid.Filter // Fork ID filter, constant across the lifetime of the node
snapSync uint32 // Flag whether snap sync is enabled (gets disabled if we already have blocks)
acceptTxs uint32 // Flag whether we're considered synchronised (enables transaction processing)
checkpointNumber uint64 // Block number for the sync progress validator to cross reference
checkpointHash common.Hash // Block hash for the sync progress validator to cross reference
database ethdb.Database
txpool txPool
chain *core.BlockChain
maxPeers int
downloader *downloader.Downloader
blockFetcher *fetcher.BlockFetcher
txFetcher *fetcher.TxFetcher
peers *peerSet
all: core rework for the merge transition (#23761) * all: work for eth1/2 transtition * consensus/beacon, eth: change beacon difficulty to 0 * eth: updates * all: add terminalBlockDifficulty config, fix rebasing issues * eth: implemented merge interop spec * internal/ethapi: update to v1.0.0.alpha.2 This commit updates the code to the new spec, moving payloadId into it's own object. It also fixes an issue with finalizing an empty blockhash. It also properly sets the basefee * all: sync polishes, other fixes + refactors * core, eth: correct semantics for LeavePoW, EnterPoS * core: fixed rebasing artifacts * core: light: performance improvements * core: use keyed field (f) * core: eth: fix compilation issues + tests * eth/catalyst: dbetter error codes * all: move Merger to consensus/, remove reliance on it in bc * all: renamed EnterPoS and LeavePoW to ReachTDD and FinalizePoS * core: make mergelogs a function * core: use InsertChain instead of InsertBlock * les: drop merger from lightchain object * consensus: add merger * core: recoverAncestors in catalyst mode * core: fix nitpick * all: removed merger from beacon, use TTD, nitpicks * consensus: eth: add docstring, removed unnecessary code duplication * consensus/beacon: better comment * all: easy to fix nitpicks by karalabe * consensus/beacon: verify known headers to be sure * core: comments * core: eth: don't drop peers who advertise blocks, nitpicks * core: never add beacon blocks to the future queue * core: fixed nitpicks * consensus/beacon: simplify IsTTDReached check * consensus/beacon: correct IsTTDReached check Co-authored-by: rjl493456442 <garyrong0905@gmail.com> Co-authored-by: Péter Szilágyi <peterke@gmail.com>
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merger *consensus.Merger
eventMux *event.TypeMux
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txsCh chan core.NewTxsEvent
txsSub event.Subscription
minedBlockSub *event.TypeMuxSubscription
requiredBlocks map[uint64]common.Hash
// channels for fetcher, syncer, txsyncLoop
quitSync chan struct{}
chainSync *chainSyncer
wg sync.WaitGroup
peerWG sync.WaitGroup
}
// newHandler returns a handler for all Ethereum chain management protocol.
func newHandler(config *handlerConfig) (*handler, error) {
// Create the protocol manager with the base fields
if config.EventMux == nil {
config.EventMux = new(event.TypeMux) // Nicety initialization for tests
}
h := &handler{
networkID: config.Network,
forkFilter: forkid.NewFilter(config.Chain),
eventMux: config.EventMux,
database: config.Database,
txpool: config.TxPool,
chain: config.Chain,
peers: newPeerSet(),
merger: config.Merger,
requiredBlocks: config.RequiredBlocks,
quitSync: make(chan struct{}),
}
if config.Sync == downloader.FullSync {
// The database seems empty as the current block is the genesis. Yet the snap
// block is ahead, so snap sync was enabled for this node at a certain point.
// The scenarios where this can happen is
// * if the user manually (or via a bad block) rolled back a snap sync node
// below the sync point.
// * the last snap sync is not finished while user specifies a full sync this
// time. But we don't have any recent state for full sync.
// In these cases however it's safe to reenable snap sync.
fullBlock, fastBlock := h.chain.CurrentBlock(), h.chain.CurrentFastBlock()
if fullBlock.NumberU64() == 0 && fastBlock.NumberU64() > 0 {
h.snapSync = uint32(1)
log.Warn("Switch sync mode from full sync to snap sync")
}
} else {
if h.chain.CurrentBlock().NumberU64() > 0 {
// Print warning log if database is not empty to run snap sync.
log.Warn("Switch sync mode from snap sync to full sync")
} else {
// If snap sync was requested and our database is empty, grant it
h.snapSync = uint32(1)
}
}
// If we have trusted checkpoints, enforce them on the chain
if config.Checkpoint != nil {
h.checkpointNumber = (config.Checkpoint.SectionIndex+1)*params.CHTFrequency - 1
h.checkpointHash = config.Checkpoint.SectionHead
}
// If sync succeeds, pass a callback to potentially disable snap sync mode
// and enable transaction propagation.
success := func() {
// If we were running snap sync and it finished, disable doing another
// round on next sync cycle
if atomic.LoadUint32(&h.snapSync) == 1 {
log.Info("Snap sync complete, auto disabling")
atomic.StoreUint32(&h.snapSync, 0)
}
// If we've successfully finished a sync cycle and passed any required
// checkpoint, enable accepting transactions from the network
head := h.chain.CurrentBlock()
if head.NumberU64() >= h.checkpointNumber {
// Checkpoint passed, sanity check the timestamp to have a fallback mechanism
// for non-checkpointed (number = 0) private networks.
if head.Time() >= uint64(time.Now().AddDate(0, -1, 0).Unix()) {
atomic.StoreUint32(&h.acceptTxs, 1)
}
}
}
// Construct the downloader (long sync) and its backing state bloom if snap
// sync is requested. The downloader is responsible for deallocating the state
// bloom when it's done.
h.downloader = downloader.New(h.checkpointNumber, config.Database, h.eventMux, h.chain, nil, h.removePeer, success)
// Construct the fetcher (short sync)
validator := func(header *types.Header) error {
all: core rework for the merge transition (#23761) * all: work for eth1/2 transtition * consensus/beacon, eth: change beacon difficulty to 0 * eth: updates * all: add terminalBlockDifficulty config, fix rebasing issues * eth: implemented merge interop spec * internal/ethapi: update to v1.0.0.alpha.2 This commit updates the code to the new spec, moving payloadId into it's own object. It also fixes an issue with finalizing an empty blockhash. It also properly sets the basefee * all: sync polishes, other fixes + refactors * core, eth: correct semantics for LeavePoW, EnterPoS * core: fixed rebasing artifacts * core: light: performance improvements * core: use keyed field (f) * core: eth: fix compilation issues + tests * eth/catalyst: dbetter error codes * all: move Merger to consensus/, remove reliance on it in bc * all: renamed EnterPoS and LeavePoW to ReachTDD and FinalizePoS * core: make mergelogs a function * core: use InsertChain instead of InsertBlock * les: drop merger from lightchain object * consensus: add merger * core: recoverAncestors in catalyst mode * core: fix nitpick * all: removed merger from beacon, use TTD, nitpicks * consensus: eth: add docstring, removed unnecessary code duplication * consensus/beacon: better comment * all: easy to fix nitpicks by karalabe * consensus/beacon: verify known headers to be sure * core: comments * core: eth: don't drop peers who advertise blocks, nitpicks * core: never add beacon blocks to the future queue * core: fixed nitpicks * consensus/beacon: simplify IsTTDReached check * consensus/beacon: correct IsTTDReached check Co-authored-by: rjl493456442 <garyrong0905@gmail.com> Co-authored-by: Péter Szilágyi <peterke@gmail.com>
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// All the block fetcher activities should be disabled
// after the transition. Print the warning log.
if h.merger.PoSFinalized() {
log.Warn("Unexpected validation activity", "hash", header.Hash(), "number", header.Number)
return errors.New("unexpected behavior after transition")
}
// Reject all the PoS style headers in the first place. No matter
// the chain has finished the transition or not, the PoS headers
// should only come from the trusted consensus layer instead of
// p2p network.
if beacon, ok := h.chain.Engine().(*beacon.Beacon); ok {
if beacon.IsPoSHeader(header) {
return errors.New("unexpected post-merge header")
}
}
return h.chain.Engine().VerifyHeader(h.chain, header, true)
}
heighter := func() uint64 {
return h.chain.CurrentBlock().NumberU64()
}
inserter := func(blocks types.Blocks) (int, error) {
all: core rework for the merge transition (#23761) * all: work for eth1/2 transtition * consensus/beacon, eth: change beacon difficulty to 0 * eth: updates * all: add terminalBlockDifficulty config, fix rebasing issues * eth: implemented merge interop spec * internal/ethapi: update to v1.0.0.alpha.2 This commit updates the code to the new spec, moving payloadId into it's own object. It also fixes an issue with finalizing an empty blockhash. It also properly sets the basefee * all: sync polishes, other fixes + refactors * core, eth: correct semantics for LeavePoW, EnterPoS * core: fixed rebasing artifacts * core: light: performance improvements * core: use keyed field (f) * core: eth: fix compilation issues + tests * eth/catalyst: dbetter error codes * all: move Merger to consensus/, remove reliance on it in bc * all: renamed EnterPoS and LeavePoW to ReachTDD and FinalizePoS * core: make mergelogs a function * core: use InsertChain instead of InsertBlock * les: drop merger from lightchain object * consensus: add merger * core: recoverAncestors in catalyst mode * core: fix nitpick * all: removed merger from beacon, use TTD, nitpicks * consensus: eth: add docstring, removed unnecessary code duplication * consensus/beacon: better comment * all: easy to fix nitpicks by karalabe * consensus/beacon: verify known headers to be sure * core: comments * core: eth: don't drop peers who advertise blocks, nitpicks * core: never add beacon blocks to the future queue * core: fixed nitpicks * consensus/beacon: simplify IsTTDReached check * consensus/beacon: correct IsTTDReached check Co-authored-by: rjl493456442 <garyrong0905@gmail.com> Co-authored-by: Péter Szilágyi <peterke@gmail.com>
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// All the block fetcher activities should be disabled
// after the transition. Print the warning log.
if h.merger.PoSFinalized() {
var ctx []interface{}
ctx = append(ctx, "blocks", len(blocks))
if len(blocks) > 0 {
ctx = append(ctx, "firsthash", blocks[0].Hash())
ctx = append(ctx, "firstnumber", blocks[0].Number())
ctx = append(ctx, "lasthash", blocks[len(blocks)-1].Hash())
ctx = append(ctx, "lastnumber", blocks[len(blocks)-1].Number())
}
log.Warn("Unexpected insertion activity", ctx...)
return 0, errors.New("unexpected behavior after transition")
}
// If sync hasn't reached the checkpoint yet, deny importing weird blocks.
//
// Ideally we would also compare the head block's timestamp and similarly reject
// the propagated block if the head is too old. Unfortunately there is a corner
// case when starting new networks, where the genesis might be ancient (0 unix)
// which would prevent full nodes from accepting it.
if h.chain.CurrentBlock().NumberU64() < h.checkpointNumber {
log.Warn("Unsynced yet, discarded propagated block", "number", blocks[0].Number(), "hash", blocks[0].Hash())
return 0, nil
}
// If snap sync is running, deny importing weird blocks. This is a problematic
// clause when starting up a new network, because snap-syncing miners might not
// accept each others' blocks until a restart. Unfortunately we haven't figured
// out a way yet where nodes can decide unilaterally whether the network is new
// or not. This should be fixed if we figure out a solution.
if atomic.LoadUint32(&h.snapSync) == 1 {
log.Warn("Fast syncing, discarded propagated block", "number", blocks[0].Number(), "hash", blocks[0].Hash())
return 0, nil
}
all: core rework for the merge transition (#23761) * all: work for eth1/2 transtition * consensus/beacon, eth: change beacon difficulty to 0 * eth: updates * all: add terminalBlockDifficulty config, fix rebasing issues * eth: implemented merge interop spec * internal/ethapi: update to v1.0.0.alpha.2 This commit updates the code to the new spec, moving payloadId into it's own object. It also fixes an issue with finalizing an empty blockhash. It also properly sets the basefee * all: sync polishes, other fixes + refactors * core, eth: correct semantics for LeavePoW, EnterPoS * core: fixed rebasing artifacts * core: light: performance improvements * core: use keyed field (f) * core: eth: fix compilation issues + tests * eth/catalyst: dbetter error codes * all: move Merger to consensus/, remove reliance on it in bc * all: renamed EnterPoS and LeavePoW to ReachTDD and FinalizePoS * core: make mergelogs a function * core: use InsertChain instead of InsertBlock * les: drop merger from lightchain object * consensus: add merger * core: recoverAncestors in catalyst mode * core: fix nitpick * all: removed merger from beacon, use TTD, nitpicks * consensus: eth: add docstring, removed unnecessary code duplication * consensus/beacon: better comment * all: easy to fix nitpicks by karalabe * consensus/beacon: verify known headers to be sure * core: comments * core: eth: don't drop peers who advertise blocks, nitpicks * core: never add beacon blocks to the future queue * core: fixed nitpicks * consensus/beacon: simplify IsTTDReached check * consensus/beacon: correct IsTTDReached check Co-authored-by: rjl493456442 <garyrong0905@gmail.com> Co-authored-by: Péter Szilágyi <peterke@gmail.com>
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if h.merger.TDDReached() {
// The blocks from the p2p network is regarded as untrusted
// after the transition. In theory block gossip should be disabled
// entirely whenever the transition is started. But in order to
// handle the transition boundary reorg in the consensus-layer,
// the legacy blocks are still accepted, but only for the terminal
// pow blocks. Spec: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-3675.md#halt-the-importing-of-pow-blocks
for i, block := range blocks {
ptd := h.chain.GetTd(block.ParentHash(), block.NumberU64()-1)
if ptd == nil {
return 0, nil
}
td := new(big.Int).Add(ptd, block.Difficulty())
if !h.chain.Config().IsTerminalPoWBlock(ptd, td) {
log.Info("Filtered out non-termimal pow block", "number", block.NumberU64(), "hash", block.Hash())
return 0, nil
}
if err := h.chain.InsertBlockWithoutSetHead(block); err != nil {
return i, err
}
}
return 0, nil
}
n, err := h.chain.InsertChain(blocks)
if err == nil {
atomic.StoreUint32(&h.acceptTxs, 1) // Mark initial sync done on any fetcher import
}
return n, err
}
h.blockFetcher = fetcher.NewBlockFetcher(false, nil, h.chain.GetBlockByHash, validator, h.BroadcastBlock, heighter, nil, inserter, h.removePeer)
fetchTx := func(peer string, hashes []common.Hash) error {
p := h.peers.peer(peer)
if p == nil {
return errors.New("unknown peer")
}
return p.RequestTxs(hashes)
}
h.txFetcher = fetcher.NewTxFetcher(h.txpool.Has, h.txpool.AddRemotes, fetchTx)
h.chainSync = newChainSyncer(h)
return h, nil
}
// runEthPeer registers an eth peer into the joint eth/snap peerset, adds it to
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// various subsystems and starts handling messages.
func (h *handler) runEthPeer(peer *eth.Peer, handler eth.Handler) error {
// If the peer has a `snap` extension, wait for it to connect so we can have
// a uniform initialization/teardown mechanism
snap, err := h.peers.waitSnapExtension(peer)
if err != nil {
peer.Log().Error("Snapshot extension barrier failed", "err", err)
return err
}
// TODO(karalabe): Not sure why this is needed
if !h.chainSync.handlePeerEvent(peer) {
return p2p.DiscQuitting
}
h.peerWG.Add(1)
defer h.peerWG.Done()
// Execute the Ethereum handshake
var (
genesis = h.chain.Genesis()
head = h.chain.CurrentHeader()
hash = head.Hash()
number = head.Number.Uint64()
td = h.chain.GetTd(hash, number)
)
forkID := forkid.NewID(h.chain.Config(), h.chain.Genesis().Hash(), h.chain.CurrentHeader().Number.Uint64())
if err := peer.Handshake(h.networkID, td, hash, genesis.Hash(), forkID, h.forkFilter); err != nil {
peer.Log().Debug("Ethereum handshake failed", "err", err)
return err
}
reject := false // reserved peer slots
if atomic.LoadUint32(&h.snapSync) == 1 {
if snap == nil {
// If we are running snap-sync, we want to reserve roughly half the peer
// slots for peers supporting the snap protocol.
// The logic here is; we only allow up to 5 more non-snap peers than snap-peers.
if all, snp := h.peers.len(), h.peers.snapLen(); all-snp > snp+5 {
reject = true
}
}
}
// Ignore maxPeers if this is a trusted peer
if !peer.Peer.Info().Network.Trusted {
if reject || h.peers.len() >= h.maxPeers {
return p2p.DiscTooManyPeers
}
}
peer.Log().Debug("Ethereum peer connected", "name", peer.Name())
// Register the peer locally
if err := h.peers.registerPeer(peer, snap); err != nil {
peer.Log().Error("Ethereum peer registration failed", "err", err)
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return err
}
defer h.unregisterPeer(peer.ID())
p := h.peers.peer(peer.ID())
if p == nil {
return errors.New("peer dropped during handling")
}
// Register the peer in the downloader. If the downloader considers it banned, we disconnect
if err := h.downloader.RegisterPeer(peer.ID(), peer.Version(), peer); err != nil {
peer.Log().Error("Failed to register peer in eth syncer", "err", err)
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return err
}
if snap != nil {
if err := h.downloader.SnapSyncer.Register(snap); err != nil {
peer.Log().Error("Failed to register peer in snap syncer", "err", err)
return err
}
}
h.chainSync.handlePeerEvent(peer)
// Propagate existing transactions. new transactions appearing
// after this will be sent via broadcasts.
h.syncTransactions(peer)
// Create a notification channel for pending requests if the peer goes down
dead := make(chan struct{})
defer close(dead)
// If we have a trusted CHT, reject all peers below that (avoid fast sync eclipse)
if h.checkpointHash != (common.Hash{}) {
// Request the peer's checkpoint header for chain height/weight validation
resCh := make(chan *eth.Response)
if _, err := peer.RequestHeadersByNumber(h.checkpointNumber, 1, 0, false, resCh); err != nil {
return err
}
// Start a timer to disconnect if the peer doesn't reply in time
go func() {
timeout := time.NewTimer(syncChallengeTimeout)
defer timeout.Stop()
select {
case res := <-resCh:
headers := ([]*types.Header)(*res.Res.(*eth.BlockHeadersPacket))
if len(headers) == 0 {
// If we're doing a snap sync, we must enforce the checkpoint
// block to avoid eclipse attacks. Unsynced nodes are welcome
// to connect after we're done joining the network.
if atomic.LoadUint32(&h.snapSync) == 1 {
peer.Log().Warn("Dropping unsynced node during sync", "addr", peer.RemoteAddr(), "type", peer.Name())
res.Done <- errors.New("unsynced node cannot serve sync")
return
}
res.Done <- nil
return
}
// Validate the header and either drop the peer or continue
if len(headers) > 1 {
res.Done <- errors.New("too many headers in checkpoint response")
return
}
if headers[0].Hash() != h.checkpointHash {
res.Done <- errors.New("checkpoint hash mismatch")
return
}
res.Done <- nil
case <-timeout.C:
peer.Log().Warn("Checkpoint challenge timed out, dropping", "addr", peer.RemoteAddr(), "type", peer.Name())
h.removePeer(peer.ID())
case <-dead:
// Peer handler terminated, abort all goroutines
}
}()
}
// If we have any explicit peer required block hashes, request them
for number, hash := range h.requiredBlocks {
resCh := make(chan *eth.Response)
if _, err := peer.RequestHeadersByNumber(number, 1, 0, false, resCh); err != nil {
return err
}
go func(number uint64, hash common.Hash) {
timeout := time.NewTimer(syncChallengeTimeout)
defer timeout.Stop()
select {
case res := <-resCh:
headers := ([]*types.Header)(*res.Res.(*eth.BlockHeadersPacket))
if len(headers) == 0 {
// Required blocks are allowed to be missing if the remote
// node is not yet synced
res.Done <- nil
return
}
// Validate the header and either drop the peer or continue
if len(headers) > 1 {
res.Done <- errors.New("too many headers in required block response")
return
}
if headers[0].Number.Uint64() != number || headers[0].Hash() != hash {
peer.Log().Info("Required block mismatch, dropping peer", "number", number, "hash", headers[0].Hash(), "want", hash)
res.Done <- errors.New("required block mismatch")
return
}
peer.Log().Debug("Peer required block verified", "number", number, "hash", hash)
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res.Done <- nil
case <-timeout.C:
peer.Log().Warn("Required block challenge timed out, dropping", "addr", peer.RemoteAddr(), "type", peer.Name())
h.removePeer(peer.ID())
}
}(number, hash)
}
// Handle incoming messages until the connection is torn down
return handler(peer)
}
// runSnapExtension registers a `snap` peer into the joint eth/snap peerset and
// starts handling inbound messages. As `snap` is only a satellite protocol to
// `eth`, all subsystem registrations and lifecycle management will be done by
// the main `eth` handler to prevent strange races.
func (h *handler) runSnapExtension(peer *snap.Peer, handler snap.Handler) error {
h.peerWG.Add(1)
defer h.peerWG.Done()
if err := h.peers.registerSnapExtension(peer); err != nil {
peer.Log().Warn("Snapshot extension registration failed", "err", err)
return err
}
return handler(peer)
}
// removePeer requests disconnection of a peer.
func (h *handler) removePeer(id string) {
peer := h.peers.peer(id)
if peer != nil {
peer.Peer.Disconnect(p2p.DiscUselessPeer)
}
}
// unregisterPeer removes a peer from the downloader, fetchers and main peer set.
func (h *handler) unregisterPeer(id string) {
// Create a custom logger to avoid printing the entire id
var logger log.Logger
if len(id) < 16 {
// Tests use short IDs, don't choke on them
logger = log.New("peer", id)
} else {
logger = log.New("peer", id[:8])
}
// Abort if the peer does not exist
peer := h.peers.peer(id)
if peer == nil {
logger.Error("Ethereum peer removal failed", "err", errPeerNotRegistered)
return
}
// Remove the `eth` peer if it exists
logger.Debug("Removing Ethereum peer", "snap", peer.snapExt != nil)
// Remove the `snap` extension if it exists
if peer.snapExt != nil {
h.downloader.SnapSyncer.Unregister(id)
}
h.downloader.UnregisterPeer(id)
h.txFetcher.Drop(id)
if err := h.peers.unregisterPeer(id); err != nil {
logger.Error("Ethereum peer removal failed", "err", err)
}
}
func (h *handler) Start(maxPeers int) {
h.maxPeers = maxPeers
// broadcast transactions
h.wg.Add(1)
h.txsCh = make(chan core.NewTxsEvent, txChanSize)
h.txsSub = h.txpool.SubscribeNewTxsEvent(h.txsCh)
go h.txBroadcastLoop()
// broadcast mined blocks
h.wg.Add(1)
h.minedBlockSub = h.eventMux.Subscribe(core.NewMinedBlockEvent{})
go h.minedBroadcastLoop()
// start sync handlers
h.wg.Add(1)
go h.chainSync.loop()
}
2015-04-18 00:24:24 +00:00
func (h *handler) Stop() {
h.txsSub.Unsubscribe() // quits txBroadcastLoop
h.minedBlockSub.Unsubscribe() // quits blockBroadcastLoop
// Quit chainSync and txsync64.
// After this is done, no new peers will be accepted.
close(h.quitSync)
h.wg.Wait()
// Disconnect existing sessions.
// This also closes the gate for any new registrations on the peer set.
// sessions which are already established but not added to h.peers yet
// will exit when they try to register.
h.peers.close()
h.peerWG.Wait()
log.Info("Ethereum protocol stopped")
}
// BroadcastBlock will either propagate a block to a subset of its peers, or
// will only announce its availability (depending what's requested).
func (h *handler) BroadcastBlock(block *types.Block, propagate bool) {
all: core rework for the merge transition (#23761) * all: work for eth1/2 transtition * consensus/beacon, eth: change beacon difficulty to 0 * eth: updates * all: add terminalBlockDifficulty config, fix rebasing issues * eth: implemented merge interop spec * internal/ethapi: update to v1.0.0.alpha.2 This commit updates the code to the new spec, moving payloadId into it's own object. It also fixes an issue with finalizing an empty blockhash. It also properly sets the basefee * all: sync polishes, other fixes + refactors * core, eth: correct semantics for LeavePoW, EnterPoS * core: fixed rebasing artifacts * core: light: performance improvements * core: use keyed field (f) * core: eth: fix compilation issues + tests * eth/catalyst: dbetter error codes * all: move Merger to consensus/, remove reliance on it in bc * all: renamed EnterPoS and LeavePoW to ReachTDD and FinalizePoS * core: make mergelogs a function * core: use InsertChain instead of InsertBlock * les: drop merger from lightchain object * consensus: add merger * core: recoverAncestors in catalyst mode * core: fix nitpick * all: removed merger from beacon, use TTD, nitpicks * consensus: eth: add docstring, removed unnecessary code duplication * consensus/beacon: better comment * all: easy to fix nitpicks by karalabe * consensus/beacon: verify known headers to be sure * core: comments * core: eth: don't drop peers who advertise blocks, nitpicks * core: never add beacon blocks to the future queue * core: fixed nitpicks * consensus/beacon: simplify IsTTDReached check * consensus/beacon: correct IsTTDReached check Co-authored-by: rjl493456442 <garyrong0905@gmail.com> Co-authored-by: Péter Szilágyi <peterke@gmail.com>
2021-11-26 11:23:02 +00:00
// Disable the block propagation if the chain has already entered the PoS
// stage. The block propagation is delegated to the consensus layer.
if h.merger.PoSFinalized() {
return
}
// Disable the block propagation if it's the post-merge block.
if beacon, ok := h.chain.Engine().(*beacon.Beacon); ok {
if beacon.IsPoSHeader(block.Header()) {
return
}
}
hash := block.Hash()
peers := h.peers.peersWithoutBlock(hash)
// If propagation is requested, send to a subset of the peer
if propagate {
// Calculate the TD of the block (it's not imported yet, so block.Td is not valid)
var td *big.Int
if parent := h.chain.GetBlock(block.ParentHash(), block.NumberU64()-1); parent != nil {
td = new(big.Int).Add(block.Difficulty(), h.chain.GetTd(block.ParentHash(), block.NumberU64()-1))
} else {
log.Error("Propagating dangling block", "number", block.Number(), "hash", hash)
return
}
// Send the block to a subset of our peers
transfer := peers[:int(math.Sqrt(float64(len(peers))))]
for _, peer := range transfer {
peer.AsyncSendNewBlock(block, td)
}
log.Trace("Propagated block", "hash", hash, "recipients", len(transfer), "duration", common.PrettyDuration(time.Since(block.ReceivedAt)))
return
}
// Otherwise if the block is indeed in out own chain, announce it
if h.chain.HasBlock(hash, block.NumberU64()) {
for _, peer := range peers {
peer.AsyncSendNewBlockHash(block)
}
log.Trace("Announced block", "hash", hash, "recipients", len(peers), "duration", common.PrettyDuration(time.Since(block.ReceivedAt)))
}
}
// BroadcastTransactions will propagate a batch of transactions
// - To a square root of all peers
// - And, separately, as announcements to all peers which are not known to
// already have the given transaction.
func (h *handler) BroadcastTransactions(txs types.Transactions) {
var (
annoCount int // Count of announcements made
annoPeers int
directCount int // Count of the txs sent directly to peers
directPeers int // Count of the peers that were sent transactions directly
txset = make(map[*ethPeer][]common.Hash) // Set peer->hash to transfer directly
annos = make(map[*ethPeer][]common.Hash) // Set peer->hash to announce
)
// Broadcast transactions to a batch of peers not knowing about it
for _, tx := range txs {
peers := h.peers.peersWithoutTransaction(tx.Hash())
// Send the tx unconditionally to a subset of our peers
numDirect := int(math.Sqrt(float64(len(peers))))
for _, peer := range peers[:numDirect] {
txset[peer] = append(txset[peer], tx.Hash())
}
// For the remaining peers, send announcement only
for _, peer := range peers[numDirect:] {
annos[peer] = append(annos[peer], tx.Hash())
}
}
for peer, hashes := range txset {
directPeers++
directCount += len(hashes)
peer.AsyncSendTransactions(hashes)
}
for peer, hashes := range annos {
annoPeers++
annoCount += len(hashes)
peer.AsyncSendPooledTransactionHashes(hashes)
}
log.Debug("Transaction broadcast", "txs", len(txs),
"announce packs", annoPeers, "announced hashes", annoCount,
"tx packs", directPeers, "broadcast txs", directCount)
}
// minedBroadcastLoop sends mined blocks to connected peers.
func (h *handler) minedBroadcastLoop() {
defer h.wg.Done()
for obj := range h.minedBlockSub.Chan() {
if ev, ok := obj.Data.(core.NewMinedBlockEvent); ok {
h.BroadcastBlock(ev.Block, true) // First propagate block to peers
h.BroadcastBlock(ev.Block, false) // Only then announce to the rest
}
}
}
// txBroadcastLoop announces new transactions to connected peers.
func (h *handler) txBroadcastLoop() {
defer h.wg.Done()
for {
select {
case event := <-h.txsCh:
h.BroadcastTransactions(event.Txs)
case <-h.txsSub.Err():
return
}
}
}