247 lines
8.1 KiB
Nim
247 lines
8.1 KiB
Nim
import
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options, tables, sets, macros,
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chronicles, chronos, stew/ranges/bitranges, libp2p/switch,
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spec/[datatypes, crypto, digest],
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beacon_node_types, eth2_network, block_pool
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logScope:
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topics = "sync"
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const
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MAX_REQUESTED_BLOCKS = SLOTS_PER_EPOCH * 4
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# A boundary on the number of blocks we'll allow in any single block
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# request - typically clients will ask for an epoch or so at a time, but we
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# allow a little bit more in case they want to stream blocks faster
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type
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StatusMsg* = object
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forkDigest*: ForkDigest
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finalizedRoot*: Eth2Digest
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finalizedEpoch*: Epoch
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headRoot*: Eth2Digest
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headSlot*: Slot
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ValidatorSetDeltaFlags {.pure.} = enum
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Activation = 0
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Exit = 1
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ValidatorChangeLogEntry* = object
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case kind*: ValidatorSetDeltaFlags
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of Activation:
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pubkey: ValidatorPubKey
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else:
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index: uint32
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BeaconBlockCallback* = proc(signedBlock: SignedBeaconBlock) {.gcsafe.}
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BeaconSyncNetworkState* = ref object
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blockPool*: BlockPool
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forkDigest*: ForkDigest
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onBeaconBlock*: BeaconBlockCallback
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BeaconSyncPeerState* = ref object
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initialStatusReceived*: bool
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statusMsg*: StatusMsg
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BlockRootSlot* = object
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blockRoot: Eth2Digest
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slot: Slot
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BlockRootsList* = List[Eth2Digest, MAX_REQUESTED_BLOCKS]
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proc shortLog*(s: StatusMsg): auto =
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(
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forkDigest: s.forkDigest,
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finalizedRoot: shortLog(s.finalizedRoot),
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finalizedEpoch: shortLog(s.finalizedEpoch),
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headRoot: shortLog(s.headRoot),
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headSlot: shortLog(s.headSlot)
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)
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chronicles.formatIt(StatusMsg): shortLog(it)
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func disconnectReasonName(reason: uint64): string =
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# haha, nim doesn't support uint64 in `case`!
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if reason == uint64(ClientShutDown): "Client shutdown"
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elif reason == uint64(IrrelevantNetwork): "Irrelevant network"
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elif reason == uint64(FaultOrError): "Fault or error"
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else: "Disconnected (" & $reason & ")"
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proc importBlocks(state: BeaconSyncNetworkState,
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blocks: openarray[SignedBeaconBlock]) {.gcsafe.} =
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for blk in blocks:
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state.onBeaconBlock(blk)
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info "Forward sync imported blocks", len = blocks.len
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proc getCurrentStatus*(state: BeaconSyncNetworkState): StatusMsg {.gcsafe.} =
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let
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blockPool = state.blockPool
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headBlock = blockPool.head.blck
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StatusMsg(
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forkDigest: state.forkDigest,
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finalizedRoot: blockPool.headState.data.data.finalized_checkpoint.root,
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finalizedEpoch: blockPool.headState.data.data.finalized_checkpoint.epoch,
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headRoot: headBlock.root,
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headSlot: headBlock.slot)
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proc handleStatus(peer: Peer,
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state: BeaconSyncNetworkState,
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ourStatus: StatusMsg,
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theirStatus: StatusMsg): Future[void] {.gcsafe.}
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proc setStatusMsg(peer: Peer, statusMsg: StatusMsg) {.gcsafe.}
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p2pProtocol BeaconSync(version = 1,
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networkState = BeaconSyncNetworkState,
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peerState = BeaconSyncPeerState):
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onPeerConnected do (peer: Peer) {.async.}:
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debug "Peer connected",
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peer, peerInfo = shortLog(peer.info), wasDialed = peer.wasDialed
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if peer.wasDialed:
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let
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ourStatus = peer.networkState.getCurrentStatus()
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# TODO: The timeout here is so high only because we fail to
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# respond in time due to high CPU load in our single thread.
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theirStatus = await peer.status(ourStatus, timeout = 60.seconds)
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if theirStatus.isOk:
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await peer.handleStatus(peer.networkState,
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ourStatus, theirStatus.get())
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else:
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warn "Status response not received in time", peer
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proc status(peer: Peer,
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theirStatus: StatusMsg,
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response: SingleChunkResponse[StatusMsg])
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{.async, libp2pProtocol("status", 1).} =
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let ourStatus = peer.networkState.getCurrentStatus()
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trace "Sending status message", peer = peer, status = ourStatus
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await response.send(ourStatus)
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await peer.handleStatus(peer.networkState, ourStatus, theirStatus)
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proc ping(peer: Peer, value: uint64): uint64
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{.libp2pProtocol("ping", 1).} =
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return peer.network.metadata.seq_number
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proc getMetadata(peer: Peer): Eth2Metadata
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{.libp2pProtocol("metadata", 1).} =
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return peer.network.metadata
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proc beaconBlocksByRange(
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peer: Peer,
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startSlot: Slot,
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count: uint64,
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step: uint64,
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response: MultipleChunksResponse[SignedBeaconBlock])
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{.async, libp2pProtocol("beacon_blocks_by_range", 1).} =
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trace "got range request", peer, startSlot, count, step
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if count > 0'u64:
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var blocks: array[MAX_REQUESTED_BLOCKS, BlockRef]
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let
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pool = peer.networkState.blockPool
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# Limit number of blocks in response
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count = min(count.Natural, blocks.len)
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let
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endIndex = count - 1
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startIndex =
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pool.getBlockRange(startSlot, step, blocks.toOpenArray(0, endIndex))
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for b in blocks[startIndex..endIndex]:
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doAssert not b.isNil, "getBlockRange should return non-nil blocks only"
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trace "wrote response block", slot = b.slot, roor = shortLog(b.root)
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await response.write(pool.get(b).data)
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debug "Block range request done",
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peer, startSlot, count, step, found = count - startIndex
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proc beaconBlocksByRoot(
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peer: Peer,
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blockRoots: BlockRootsList,
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response: MultipleChunksResponse[SignedBeaconBlock])
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{.async, libp2pProtocol("beacon_blocks_by_root", 1).} =
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let
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pool = peer.networkState.blockPool
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count = blockRoots.len
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var found = 0
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for root in blockRoots[0..<count]:
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let blockRef = pool.getRef(root)
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if not isNil(blockRef):
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await response.write(pool.get(blockRef).data)
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inc found
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debug "Block root request done",
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peer, roots = blockRoots.len, count, found
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proc goodbye(peer: Peer,
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reason: uint64)
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{.async, libp2pProtocol("goodbye", 1).} =
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debug "Received Goodbye message", reason = disconnectReasonName(reason), peer
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proc setStatusMsg(peer: Peer, statusMsg: StatusMsg) =
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debug "Peer status", peer, statusMsg
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peer.state(BeaconSync).initialStatusReceived = true
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peer.state(BeaconSync).statusMsg = statusMsg
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proc updateStatus*(peer: Peer): Future[bool] {.async.} =
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## Request `status` of remote peer ``peer``.
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let
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nstate = peer.networkState(BeaconSync)
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ourStatus = getCurrentStatus(nstate)
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let theirFut = awaitne peer.status(ourStatus,
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timeout = chronos.seconds(60))
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if theirFut.failed():
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result = false
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else:
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let theirStatus = theirFut.read()
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if theirStatus.isOk:
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peer.setStatusMsg(theirStatus.get)
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result = true
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proc hasInitialStatus*(peer: Peer): bool {.inline.} =
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## Returns head slot for specific peer ``peer``.
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peer.state(BeaconSync).initialStatusReceived
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proc getHeadSlot*(peer: Peer): Slot {.inline.} =
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## Returns head slot for specific peer ``peer``.
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result = peer.state(BeaconSync).statusMsg.headSlot
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proc handleStatus(peer: Peer,
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state: BeaconSyncNetworkState,
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ourStatus: StatusMsg,
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theirStatus: StatusMsg) {.async, gcsafe.} =
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if theirStatus.forkDigest != state.forkDigest:
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notice "Irrelevant peer", peer, theirStatus, ourStatus
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await peer.disconnect(IrrelevantNetwork)
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else:
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if not peer.state(BeaconSync).initialStatusReceived:
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# Initial/handshake status message handling
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peer.state(BeaconSync).initialStatusReceived = true
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debug "Peer connected", peer, ourStatus = shortLog(ourStatus),
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theirStatus = shortLog(theirStatus)
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var res: bool
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if peer.wasDialed:
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res = await handleOutgoingPeer(peer)
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else:
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res = await handleIncomingPeer(peer)
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if not res:
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debug "Peer is dead or already in pool", peer
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await peer.disconnect(ClientShutDown)
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peer.setStatusMsg(theirStatus)
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proc initBeaconSync*(network: Eth2Node,
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blockPool: BlockPool,
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forkDigest: ForkDigest,
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onBeaconBlock: BeaconBlockCallback) =
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var networkState = network.protocolState(BeaconSync)
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networkState.blockPool = blockPool
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networkState.forkDigest = forkDigest
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networkState.onBeaconBlock = onBeaconBlock
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