2692 lines
96 KiB
Nim
2692 lines
96 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2023 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [].}
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import
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# Std lib
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std/[typetraits, os, sequtils, strutils, algorithm, math, tables],
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# Status libs
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stew/[leb128, endians2, results, byteutils, io2, bitops2],
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stew/shims/net as stewNet,
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stew/shims/[macros],
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faststreams/[inputs, outputs, buffers], snappy, snappy/faststreams,
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json_serialization, json_serialization/std/[net, sets, options],
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chronos, chronos/ratelimit, chronicles, metrics,
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libp2p/[switch, peerinfo, multiaddress, multicodec, crypto/crypto,
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crypto/secp, builders],
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libp2p/protocols/pubsub/[
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pubsub, gossipsub, rpc/message, rpc/messages, peertable, pubsubpeer],
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libp2p/stream/connection,
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eth/[keys, async_utils], eth/p2p/p2p_protocol_dsl,
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eth/net/nat, eth/p2p/discoveryv5/[enr, node, random2],
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".."/[version, conf, beacon_clock, conf_light_client],
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../spec/datatypes/[phase0, altair, bellatrix],
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../spec/[eth2_ssz_serialization, network, helpers, forks],
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../validators/keystore_management,
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"."/[eth2_discovery, libp2p_json_serialization, peer_pool, peer_scores]
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export
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tables, chronos, ratelimit, version, multiaddress, peerinfo, p2pProtocol,
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connection, libp2p_json_serialization, eth2_ssz_serialization, results,
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eth2_discovery, peer_pool, peer_scores
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logScope:
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topics = "networking"
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type
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NetKeyPair* = crypto.KeyPair
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PublicKey* = crypto.PublicKey
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PrivateKey* = crypto.PrivateKey
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Bytes = seq[byte]
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ErrorMsg = List[byte, 256]
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SendResult* = Result[void, cstring]
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# TODO: This is here only to eradicate a compiler
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# warning about unused import (rpc/messages).
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GossipMsg = messages.Message
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SeenItem* = object
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peerId*: PeerId
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stamp*: chronos.Moment
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Eth2Node* = ref object of RootObj
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switch*: Switch
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pubsub*: GossipSub
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discovery*: Eth2DiscoveryProtocol
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discoveryEnabled*: bool
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wantedPeers*: int
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hardMaxPeers*: int
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peerPool*: PeerPool[Peer, PeerId]
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protocolStates*: seq[RootRef]
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metadata*: altair.MetaData
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connectTimeout*: chronos.Duration
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seenThreshold*: chronos.Duration
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connQueue: AsyncQueue[PeerAddr]
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seenTable: Table[PeerId, SeenItem]
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connWorkers: seq[Future[void]]
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connTable: HashSet[PeerId]
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forkId*: ENRForkID
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discoveryForkId*: ENRForkID
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forkDigests*: ref ForkDigests
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rng*: ref HmacDrbgContext
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peers*: Table[PeerId, Peer]
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validTopics: HashSet[string]
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peerPingerHeartbeatFut: Future[void]
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peerTrimmerHeartbeatFut: Future[void]
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cfg: RuntimeConfig
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getBeaconTime: GetBeaconTimeFn
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quota: TokenBucket ## Global quota mainly for high-bandwidth stuff
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EthereumNode = Eth2Node # needed for the definitions in p2p_backends_helpers
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AverageThroughput* = object
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count*: uint64
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average*: float
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Peer* = ref object
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network*: Eth2Node
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peerId*: PeerId
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discoveryId*: Eth2DiscoveryId
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connectionState*: ConnectionState
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protocolStates*: seq[RootRef]
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netThroughput: AverageThroughput
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score*: int
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quota*: TokenBucket
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lastReqTime*: Moment
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connections*: int
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enr*: Option[enr.Record]
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metadata*: Option[altair.MetaData]
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failedMetadataRequests: int
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lastMetadataTime*: Moment
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direction*: PeerType
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disconnectedFut: Future[void]
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statistics*: SyncResponseStats
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PeerAddr* = object
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peerId*: PeerId
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addrs*: seq[MultiAddress]
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ConnectionState* = enum
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None,
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Connecting,
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Connected,
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Disconnecting,
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Disconnected
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UntypedResponse* = ref object
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peer*: Peer
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stream*: Connection
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writtenChunks*: int
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SingleChunkResponse*[MsgType] = distinct UntypedResponse
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## Protocol requests using this type will produce request-making
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## client-side procs that return `NetRes[MsgType]`
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MultipleChunksResponse*[MsgType; maxLen: static Limit] = distinct UntypedResponse
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## Protocol requests using this type will produce request-making
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## client-side procs that return `NetRes[List[MsgType, maxLen]]`.
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## In the future, such procs will return an `InputStream[NetRes[MsgType]]`.
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MessageInfo* = object
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name*: string
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# Private fields:
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libp2pCodecName: string
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protocolMounter*: MounterProc
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isRequired, isLightClientRequest: bool
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ProtocolInfoObj* = object
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name*: string
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messages*: seq[MessageInfo]
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index*: int # the position of the protocol in the
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# ordered list of supported protocols
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# Private fields:
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peerStateInitializer*: PeerStateInitializer
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networkStateInitializer*: NetworkStateInitializer
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onPeerConnected*: OnPeerConnectedHandler
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onPeerDisconnected*: OnPeerDisconnectedHandler
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ProtocolInfo* = ptr ProtocolInfoObj
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ResponseCode* = enum
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Success
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InvalidRequest
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ServerError
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ResourceUnavailable
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PeerStateInitializer* = proc(peer: Peer): RootRef {.gcsafe, raises: [Defect].}
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NetworkStateInitializer* = proc(network: EthereumNode): RootRef {.gcsafe, raises: [Defect].}
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OnPeerConnectedHandler* = proc(peer: Peer, incoming: bool): Future[void] {.gcsafe, raises: [Defect].}
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OnPeerDisconnectedHandler* = proc(peer: Peer): Future[void] {.gcsafe, raises: [Defect].}
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ThunkProc* = LPProtoHandler
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MounterProc* = proc(network: Eth2Node) {.gcsafe, raises: [Defect, CatchableError].}
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MessageContentPrinter* = proc(msg: pointer): string {.gcsafe, raises: [Defect].}
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# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#goodbye
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DisconnectionReason* = enum
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# might see other values on the wire!
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ClientShutDown = 1
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IrrelevantNetwork = 2
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FaultOrError = 3
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# Clients MAY use reason codes above 128 to indicate alternative,
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# erroneous request-specific responses.
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PeerScoreLow = 237 # 79 * 3
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PeerDisconnected* = object of CatchableError
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reason*: DisconnectionReason
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TransmissionError* = object of CatchableError
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Eth2NetworkingErrorKind* = enum
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# Potentially benign errors (network conditions)
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BrokenConnection
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ReceivedErrorResponse
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UnexpectedEOF
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PotentiallyExpectedEOF
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StreamOpenTimeout
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ReadResponseTimeout
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# Errors for which we descore heavily (protocol violations)
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InvalidResponseCode
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InvalidSnappyBytes
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InvalidSszBytes
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InvalidSizePrefix
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ZeroSizePrefix
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SizePrefixOverflow
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InvalidContextBytes
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ResponseChunkOverflow
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Eth2NetworkingError = object
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case kind*: Eth2NetworkingErrorKind
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of ReceivedErrorResponse:
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responseCode*: ResponseCode
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errorMsg*: string
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else:
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discard
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InvalidInputsError* = object of CatchableError
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ResourceUnavailableError* = object of CatchableError
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NetRes*[T] = Result[T, Eth2NetworkingError]
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## This is type returned from all network requests
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const
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clientId* = "Nimbus beacon node " & fullVersionStr
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requestPrefix = "/eth2/beacon_chain/req/"
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requestSuffix = "/ssz_snappy"
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ConcurrentConnections = 20
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## Maximum number of active concurrent connection requests.
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SeenTableTimeTimeout =
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when not defined(local_testnet): 5.minutes else: 10.seconds
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## Seen period of time for timeout connections
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SeenTableTimeDeadPeer =
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when not defined(local_testnet): 5.minutes else: 10.seconds
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## Period of time for dead peers.
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SeenTableTimeIrrelevantNetwork = 24.hours
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## Period of time for `IrrelevantNetwork` error reason.
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SeenTableTimeClientShutDown = 10.minutes
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## Period of time for `ClientShutDown` error reason.
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SeenTableTimeFaultOrError = 10.minutes
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## Period of time for `FaultOnError` error reason.
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SeenTablePenaltyError = 60.minutes
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## Period of time for peers which score below or equal to zero.
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SeenTableTimeReconnect = 1.minutes
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## Minimal time between disconnection and reconnection attempt
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ProtocolViolations = {InvalidResponseCode..Eth2NetworkingErrorKind.high()}
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template neterr*(kindParam: Eth2NetworkingErrorKind): auto =
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err(type(result), Eth2NetworkingError(kind: kindParam))
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# Metrics for tracking attestation and beacon block loss
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declareCounter nbc_gossip_messages_sent,
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"Number of gossip messages sent by this peer"
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declareCounter nbc_gossip_messages_received,
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"Number of gossip messages received by this peer"
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declareCounter nbc_gossip_failed_snappy,
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"Number of gossip messages that failed snappy decompression"
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declareCounter nbc_gossip_failed_ssz,
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"Number of gossip messages that failed SSZ parsing"
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declareCounter nbc_successful_dials,
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"Number of successfully dialed peers"
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declareCounter nbc_failed_dials,
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"Number of dialing attempts that failed"
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declareCounter nbc_timeout_dials,
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"Number of dialing attempts that exceeded timeout"
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declareGauge nbc_peers,
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"Number of active libp2p peers"
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declareCounter nbc_successful_discoveries,
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"Number of successful discoveries"
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declareCounter nbc_failed_discoveries,
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"Number of failed discoveries"
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declareCounter nbc_cycling_kicked_peers,
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"Number of peers kicked for peer cycling"
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declareGauge nbc_gossipsub_low_fanout,
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"numbers of topics with low fanout"
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declareGauge nbc_gossipsub_good_fanout,
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"numbers of topics with good fanout"
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declareGauge nbc_gossipsub_healthy_fanout,
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"numbers of topics with dHigh fanout"
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declareHistogram nbc_resolve_time,
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"Time(s) used while resolving peer information",
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buckets = [1.0, 5.0, 10.0, 20.0, 40.0, 60.0]
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declareCounter nbc_reqresp_messages_sent,
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"Number of Req/Resp messages sent", labels = ["protocol"]
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declareCounter nbc_reqresp_messages_received,
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"Number of Req/Resp messages received", labels = ["protocol"]
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declareCounter nbc_reqresp_messages_failed,
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"Number of Req/Resp messages that failed decoding", labels = ["protocol"]
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declareCounter nbc_reqresp_messages_throttled,
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"Number of Req/Resp messages that were throttled", labels = ["protocol"]
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const
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libp2p_pki_schemes {.strdefine.} = ""
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when libp2p_pki_schemes != "secp256k1":
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{.fatal: "Incorrect building process, please use -d:\"libp2p_pki_schemes=secp256k1\"".}
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const
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NetworkInsecureKeyPassword = "INSECUREPASSWORD"
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template libp2pProtocol*(name: string, version: int,
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isRequired = false,
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isLightClientRequest = false) {.pragma.}
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func shortLog*(peer: Peer): string = shortLog(peer.peerId)
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chronicles.formatIt(Peer): shortLog(it)
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chronicles.formatIt(PublicKey): byteutils.toHex(it.getBytes().tryGet())
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func shortProtocolId(protocolId: string): string =
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let
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start = if protocolId.startsWith(requestPrefix): requestPrefix.len else: 0
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ends = if protocolId.endsWith(requestSuffix):
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protocolId.high - requestSuffix.len
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else:
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protocolId.high
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protocolId[start..ends]
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proc openStream(node: Eth2Node,
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peer: Peer,
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protocolId: string): Future[Connection] {.async.} =
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# When dialling here, we do not provide addresses - all new connection
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# attempts are handled via `connect` which also takes into account
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# reconnection timeouts
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let
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conn = await dial(node.switch, peer.peerId, protocolId)
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return conn
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proc init(T: type Peer, network: Eth2Node, peerId: PeerId): Peer {.gcsafe.}
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func peerId*(node: Eth2Node): PeerId =
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node.switch.peerInfo.peerId
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func enrRecord*(node: Eth2Node): Record =
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node.discovery.localNode.record
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proc getPeer(node: Eth2Node, peerId: PeerId): Peer =
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node.peers.withValue(peerId, peer) do:
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return peer[]
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do:
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let peer = Peer.init(node, peerId)
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return node.peers.mgetOrPut(peerId, peer)
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proc peerFromStream(network: Eth2Node, conn: Connection): Peer =
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result = network.getPeer(conn.peerId)
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result.peerId = conn.peerId
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func getKey*(peer: Peer): PeerId {.inline.} =
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peer.peerId
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proc getFuture(peer: Peer): Future[void] {.inline.} =
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if isNil(peer.disconnectedFut):
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peer.disconnectedFut = newFuture[void]("Peer.disconnectedFut")
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peer.disconnectedFut
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func getScore*(a: Peer): int =
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## Returns current score value for peer ``peer``.
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a.score
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func updateScore*(peer: Peer, score: int) {.inline.} =
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## Update peer's ``peer`` score with value ``score``.
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peer.score = peer.score + score
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if peer.score > PeerScoreHighLimit:
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peer.score = PeerScoreHighLimit
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func updateStats*(peer: Peer, index: SyncResponseKind,
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value: uint64) {.inline.} =
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## Update peer's ``peer`` specific ``index`` statistics with value ``value``.
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peer.statistics.update(index, value)
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func getStats*(peer: Peer, index: SyncResponseKind): uint64 {.inline.} =
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## Returns current statistics value for peer ``peer`` and index ``index``.
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peer.statistics.get(index)
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func calcThroughput(dur: Duration, value: uint64): float =
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let secs = float(chronos.seconds(1).nanoseconds)
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if isZero(dur):
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0.0
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else:
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float(value) * (secs / float(dur.nanoseconds))
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func updateNetThroughput(peer: Peer, dur: Duration,
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bytesCount: uint64) {.inline.} =
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## Update peer's ``peer`` network throughput.
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let bytesPerSecond = calcThroughput(dur, bytesCount)
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let a = peer.netThroughput.average
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let n = peer.netThroughput.count
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peer.netThroughput.average = a + (bytesPerSecond - a) / float(n + 1)
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inc(peer.netThroughput.count)
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func netKbps*(peer: Peer): float {.inline.} =
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## Returns current network throughput average value in Kbps for peer ``peer``.
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round(((peer.netThroughput.average / 1024) * 10_000) / 10_000)
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func `<`(a, b: Peer): bool =
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## Comparison function, which first checks peer's scores, and if the peers'
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## score is equal it compares peers' network throughput.
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if a.score < b.score:
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true
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elif a.score == b.score:
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(a.netThroughput.average < b.netThroughput.average)
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else:
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false
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const
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maxRequestQuota = 1000000
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maxGlobalQuota = 2 * maxRequestQuota
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## Roughly, this means we allow 2 peers to sync from us at a time
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fullReplenishTime = 5.seconds
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template awaitQuota*(peerParam: Peer, costParam: float, protocolIdParam: string) =
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let
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peer = peerParam
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cost = int(costParam)
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if not peer.quota.tryConsume(cost.int):
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let protocolId = protocolIdParam
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debug "Awaiting peer quota", peer, cost, protocolId
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nbc_reqresp_messages_throttled.inc(1, [protocolId])
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await peer.quota.consume(cost.int)
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template awaitQuota*(networkParam: Eth2Node, costParam: float, protocolIdParam: string) =
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let
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network = networkParam
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cost = int(costParam)
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if not network.quota.tryConsume(cost.int):
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let protocolId = protocolIdParam
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debug "Awaiting network quota", peer, cost, protocolId
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nbc_reqresp_messages_throttled.inc(1, [protocolId])
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await network.quota.consume(cost.int)
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func allowedOpsPerSecondCost*(n: int): float =
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const replenishRate = (maxRequestQuota / fullReplenishTime.nanoseconds.float)
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(replenishRate * 1000000000'f / n.float)
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const
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libp2pRequestCost = allowedOpsPerSecondCost(8)
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## Maximum number of libp2p requests per peer per second
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proc isSeen(network: Eth2Node, peerId: PeerId): bool =
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## Returns ``true`` if ``peerId`` present in SeenTable and time period is not
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## yet expired.
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let currentTime = now(chronos.Moment)
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if peerId notin network.seenTable:
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false
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else:
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let item = try: network.seenTable[peerId]
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except KeyError: raiseAssert "checked with notin"
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if currentTime >= item.stamp:
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# Peer is in SeenTable, but the time period has expired.
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network.seenTable.del(peerId)
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false
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else:
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true
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proc addSeen(network: Eth2Node, peerId: PeerId,
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period: chronos.Duration) =
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## Adds peer with PeerId ``peerId`` to SeenTable and timeout ``period``.
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let item = SeenItem(peerId: peerId, stamp: now(chronos.Moment) + period)
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withValue(network.seenTable, peerId, entry) do:
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if entry.stamp < item.stamp:
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entry.stamp = item.stamp
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do:
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network.seenTable[peerId] = item
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proc disconnect*(peer: Peer, reason: DisconnectionReason,
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notifyOtherPeer = false) {.async.} =
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# TODO(zah): How should we notify the other peer?
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try:
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if peer.connectionState notin {Disconnecting, Disconnected}:
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peer.connectionState = Disconnecting
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# We adding peer in SeenTable before actual disconnect to avoid races.
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let seenTime = case reason
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of ClientShutDown:
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SeenTableTimeClientShutDown
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of IrrelevantNetwork:
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SeenTableTimeIrrelevantNetwork
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of FaultOrError:
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SeenTableTimeFaultOrError
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of PeerScoreLow:
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SeenTablePenaltyError
|
|
peer.network.addSeen(peer.peerId, seenTime)
|
|
await peer.network.switch.disconnect(peer.peerId)
|
|
except CatchableError:
|
|
# We do not care about exceptions in disconnection procedure.
|
|
trace "Exception while disconnecting peer", peer = peer.peerId,
|
|
reason = reason
|
|
|
|
include eth/p2p/p2p_backends_helpers
|
|
include eth/p2p/p2p_tracing
|
|
|
|
proc getRequestProtoName(fn: NimNode): NimNode =
|
|
# `getCustomPragmaVal` doesn't work yet on regular nnkProcDef nodes
|
|
# (TODO: file as an issue)
|
|
|
|
let pragmas = fn.pragma
|
|
if pragmas.kind == nnkPragma and pragmas.len > 0:
|
|
for pragma in pragmas:
|
|
try:
|
|
if pragma.len > 0 and $pragma[0] == "libp2pProtocol":
|
|
let protoName = $(pragma[1])
|
|
let protoVer = $(pragma[2].intVal)
|
|
return newLit(requestPrefix & protoName & "/" & protoVer & requestSuffix)
|
|
except Exception as exc: raiseAssert exc.msg # TODO https://github.com/nim-lang/Nim/issues/17454
|
|
|
|
return newLit("")
|
|
|
|
proc isRequiredProto(fn: NimNode): NimNode =
|
|
# `getCustomPragmaVal` doesn't work yet on regular nnkProcDef nodes
|
|
# (TODO: file as an issue)
|
|
|
|
let pragmas = fn.pragma
|
|
if pragmas.kind == nnkPragma and pragmas.len > 0:
|
|
for pragma in pragmas:
|
|
try:
|
|
if pragma.len > 0 and $pragma[0] == "libp2pProtocol":
|
|
if pragma.len <= 3:
|
|
return newLit(false)
|
|
for i in 3 ..< pragma.len:
|
|
let param = pragma[i]
|
|
case param.kind
|
|
of nnkExprEqExpr:
|
|
if $param[0] == "isRequired":
|
|
if $param[1] == "true":
|
|
return newLit(true)
|
|
if $param[1] == "false":
|
|
return newLit(false)
|
|
raiseAssert "Unexpected value: " & $param
|
|
if $param[0] != "isLightClientRequest":
|
|
raiseAssert "Unexpected param: " & $param
|
|
of nnkIdent:
|
|
if i == 3:
|
|
return newLit(param.boolVal)
|
|
else: raiseAssert "Unexpected kind: " & param.kind.repr
|
|
return newLit(false)
|
|
except Exception as exc: raiseAssert exc.msg # TODO https://github.com/nim-lang/Nim/issues/17454
|
|
|
|
return newLit(false)
|
|
|
|
proc isLightClientRequestProto(fn: NimNode): NimNode =
|
|
# `getCustomPragmaVal` doesn't work yet on regular nnkProcDef nodes
|
|
# (TODO: file as an issue)
|
|
|
|
let pragmas = fn.pragma
|
|
if pragmas.kind == nnkPragma and pragmas.len > 0:
|
|
for pragma in pragmas:
|
|
try:
|
|
if pragma.len > 0 and $pragma[0] == "libp2pProtocol":
|
|
if pragma.len <= 3:
|
|
return newLit(false)
|
|
for i in 3 ..< pragma.len:
|
|
let param = pragma[i]
|
|
case param.kind
|
|
of nnkExprEqExpr:
|
|
if $param[0] == "isLightClientRequest":
|
|
if $param[1] == "true":
|
|
return newLit(true)
|
|
if $param[1] == "false":
|
|
return newLit(false)
|
|
raiseAssert "Unexpected value: " & $param
|
|
if $param[0] != "isRequired":
|
|
raiseAssert "Unexpected param: " & $param
|
|
of nnkIdent:
|
|
if i == 4:
|
|
return newLit(param.boolVal)
|
|
else: raiseAssert "Unexpected kind: " & param.kind.repr
|
|
return newLit(false)
|
|
except Exception as exc: raiseAssert exc.msg # TODO https://github.com/nim-lang/Nim/issues/17454
|
|
|
|
return newLit(false)
|
|
|
|
proc writeChunkSZ(
|
|
conn: Connection, responseCode: Option[ResponseCode],
|
|
uncompressedLen: uint64, payloadSZ: openArray[byte],
|
|
contextBytes: openArray[byte] = []): Future[void] =
|
|
# max 10 bytes varint length + 1 byte response code + data
|
|
const numOverheadBytes = sizeof(byte) + Leb128.maxLen(typeof(uncompressedLen))
|
|
var output = memoryOutput(payloadSZ.len + contextBytes.len + numOverheadBytes)
|
|
try:
|
|
if responseCode.isSome:
|
|
output.write byte(responseCode.get)
|
|
|
|
if contextBytes.len > 0:
|
|
output.write contextBytes
|
|
|
|
output.write toBytes(uncompressedLen, Leb128).toOpenArray()
|
|
output.write payloadSZ
|
|
except IOError as exc:
|
|
raiseAssert exc.msg # memoryOutput shouldn't raise
|
|
|
|
conn.write(output.getOutput)
|
|
|
|
proc writeChunk(conn: Connection,
|
|
responseCode: Option[ResponseCode],
|
|
payload: openArray[byte],
|
|
contextBytes: openArray[byte] = []): Future[void] =
|
|
var output = memoryOutput()
|
|
|
|
try:
|
|
if responseCode.isSome:
|
|
output.write byte(responseCode.get)
|
|
|
|
if contextBytes.len > 0:
|
|
output.write contextBytes
|
|
|
|
output.write toBytes(payload.lenu64, Leb128).toOpenArray()
|
|
|
|
compressFramed(payload, output)
|
|
except IOError as exc:
|
|
raiseAssert exc.msg # memoryOutput shouldn't raise
|
|
conn.write(output.getOutput)
|
|
|
|
template errorMsgLit(x: static string): ErrorMsg =
|
|
const val = ErrorMsg toBytes(x)
|
|
val
|
|
|
|
func formatErrorMsg(msg: ErrorMsg): string =
|
|
# ErrorMsg "usually" contains a human-readable string - we'll try to parse it
|
|
# as ASCII and return hex if that fails
|
|
for c in msg:
|
|
if c < 32 or c > 127:
|
|
return byteutils.toHex(asSeq(msg))
|
|
|
|
string.fromBytes(asSeq(msg))
|
|
|
|
proc sendErrorResponse(peer: Peer,
|
|
conn: Connection,
|
|
responseCode: ResponseCode,
|
|
errMsg: ErrorMsg): Future[void] =
|
|
debug "Error processing request",
|
|
peer, responseCode, errMsg = formatErrorMsg(errMsg)
|
|
conn.writeChunk(some responseCode, SSZ.encode(errMsg))
|
|
|
|
proc sendNotificationMsg(peer: Peer, protocolId: string, requestBytes: Bytes) {.async.} =
|
|
var
|
|
deadline = sleepAsync RESP_TIMEOUT
|
|
streamFut = peer.network.openStream(peer, protocolId)
|
|
|
|
await streamFut or deadline
|
|
|
|
if not streamFut.finished:
|
|
await streamFut.cancelAndWait()
|
|
raise newException(TransmissionError, "Failed to open LibP2P stream")
|
|
|
|
let stream = streamFut.read
|
|
try:
|
|
await stream.writeChunk(none ResponseCode, requestBytes)
|
|
finally:
|
|
await stream.close()
|
|
|
|
proc sendResponseChunkBytesSZ(
|
|
response: UntypedResponse, uncompressedLen: uint64,
|
|
payloadSZ: openArray[byte],
|
|
contextBytes: openArray[byte] = []): Future[void] =
|
|
inc response.writtenChunks
|
|
response.stream.writeChunkSZ(
|
|
some Success, uncompressedLen, payloadSZ, contextBytes)
|
|
|
|
proc sendResponseChunkBytes(
|
|
response: UntypedResponse, payload: openArray[byte],
|
|
contextBytes: openArray[byte] = []): Future[void] =
|
|
inc response.writtenChunks
|
|
response.stream.writeChunk(some Success, payload, contextBytes)
|
|
|
|
proc sendResponseChunk(
|
|
response: UntypedResponse, val: auto,
|
|
contextBytes: openArray[byte] = []): Future[void] =
|
|
sendResponseChunkBytes(response, SSZ.encode(val), contextBytes)
|
|
|
|
template sendUserHandlerResultAsChunkImpl*(stream: Connection,
|
|
handlerResultFut: Future): untyped =
|
|
let handlerRes = await handlerResultFut
|
|
writeChunk(stream, some Success, SSZ.encode(handlerRes))
|
|
|
|
template sendUserHandlerResultAsChunkImpl*(stream: Connection,
|
|
handlerResult: auto): untyped =
|
|
writeChunk(stream, some Success, SSZ.encode(handlerResult))
|
|
|
|
proc uncompressFramedStream(conn: Connection,
|
|
expectedSize: int): Future[Result[seq[byte], cstring]]
|
|
{.async.} =
|
|
var header: array[framingHeader.len, byte]
|
|
try:
|
|
await conn.readExactly(addr header[0], header.len)
|
|
except LPStreamEOFError, LPStreamIncompleteError:
|
|
return err "Unexpected EOF before snappy header"
|
|
|
|
if header != framingHeader:
|
|
return err "Incorrect snappy header"
|
|
|
|
static:
|
|
doAssert maxCompressedFrameDataLen >= maxUncompressedFrameDataLen.uint64
|
|
|
|
var
|
|
frameData = newSeq[byte](maxCompressedFrameDataLen + 4)
|
|
output = newSeqUninitialized[byte](expectedSize)
|
|
written = 0
|
|
|
|
while written < expectedSize:
|
|
var frameHeader: array[4, byte]
|
|
try:
|
|
await conn.readExactly(addr frameHeader[0], frameHeader.len)
|
|
except LPStreamEOFError, LPStreamIncompleteError:
|
|
return err "Snappy frame header missing"
|
|
|
|
let (id, dataLen) = decodeFrameHeader(frameHeader)
|
|
|
|
if dataLen > frameData.len:
|
|
# In theory, compressed frames could be bigger and still result in a
|
|
# valid, small snappy frame, but this would mean they are not getting
|
|
# compressed correctly
|
|
return err "Snappy frame too big"
|
|
|
|
if dataLen > 0:
|
|
try:
|
|
await conn.readExactly(addr frameData[0], dataLen)
|
|
except LPStreamEOFError, LPStreamIncompleteError:
|
|
return err "Incomplete snappy frame"
|
|
|
|
if id == chunkCompressed:
|
|
if dataLen < 6: # At least CRC + 2 bytes of frame data
|
|
return err "Compressed snappy frame too small"
|
|
|
|
let
|
|
crc = uint32.fromBytesLE frameData.toOpenArray(0, 3)
|
|
uncompressed =
|
|
snappy.uncompress(
|
|
frameData.toOpenArray(4, dataLen - 1),
|
|
output.toOpenArray(written, output.high)).valueOr:
|
|
return err "Failed to decompress content"
|
|
|
|
if maskedCrc(
|
|
output.toOpenArray(written, written + uncompressed-1)) != crc:
|
|
return err "Snappy content CRC checksum failed"
|
|
|
|
written += uncompressed
|
|
|
|
elif id == chunkUncompressed:
|
|
if dataLen < 5: # At least one byte of data
|
|
return err "Uncompressed snappy frame too small"
|
|
|
|
let uncompressed = dataLen - 4
|
|
|
|
if uncompressed > maxUncompressedFrameDataLen.int:
|
|
return err "Snappy frame size too large"
|
|
|
|
if uncompressed > output.len - written:
|
|
return err "Too much data"
|
|
|
|
let crc = uint32.fromBytesLE frameData.toOpenArray(0, 3)
|
|
if maskedCrc(frameData.toOpenArray(4, dataLen - 1)) != crc:
|
|
return err "Snappy content CRC checksum failed"
|
|
|
|
output[written..<written + uncompressed] =
|
|
frameData.toOpenArray(4, dataLen-1)
|
|
written += uncompressed
|
|
|
|
elif id < 0x80:
|
|
# Reserved unskippable chunks (chunk types 0x02-0x7f)
|
|
# if we encounter this type of chunk, stop decoding
|
|
# the spec says it is an error
|
|
return err "Invalid snappy chunk type"
|
|
|
|
else:
|
|
# Reserved skippable chunks (chunk types 0x80-0xfe)
|
|
# including STREAM_HEADER (0xff) should be skipped
|
|
continue
|
|
|
|
return ok output
|
|
|
|
func chunkMaxSize[T](): uint32 =
|
|
# compiler error on (T: type) syntax...
|
|
when T is ForkySignedBeaconBlock:
|
|
when T is phase0.SignedBeaconBlock or T is altair.SignedBeaconBlock or
|
|
T is bellatrix.SignedBeaconBlock or T is capella.SignedBeaconBlock or
|
|
T is deneb.SignedBeaconBlock:
|
|
MAX_CHUNK_SIZE_BELLATRIX
|
|
else:
|
|
{.fatal: "what's the chunk size here?".}
|
|
elif isFixedSize(T):
|
|
uint32 fixedPortionSize(T)
|
|
else:
|
|
MAX_CHUNK_SIZE_BELLATRIX
|
|
|
|
from ../spec/datatypes/capella import SignedBeaconBlock
|
|
from ../spec/datatypes/deneb import SignedBeaconBlock
|
|
|
|
template gossipMaxSize(T: untyped): uint32 =
|
|
const maxSize = static:
|
|
when isFixedSize(T):
|
|
fixedPortionSize(T)
|
|
elif T is bellatrix.SignedBeaconBlock or T is capella.SignedBeaconBlock or
|
|
T is deneb.SignedBeaconBlock:
|
|
GOSSIP_MAX_SIZE_BELLATRIX
|
|
# TODO https://github.com/status-im/nim-ssz-serialization/issues/20 for
|
|
# Attestation, AttesterSlashing, and SignedAggregateAndProof, which all
|
|
# have lists bounded at MAX_VALIDATORS_PER_COMMITTEE (2048) items, thus
|
|
# having max sizes significantly smaller than GOSSIP_MAX_SIZE.
|
|
elif T is Attestation or T is AttesterSlashing or
|
|
T is SignedAggregateAndProof or T is phase0.SignedBeaconBlock or
|
|
T is altair.SignedBeaconBlock or T is SomeForkyLightClientObject:
|
|
GOSSIP_MAX_SIZE_BELLATRIX
|
|
else:
|
|
{.fatal: "unknown type " & name(T).}
|
|
static: doAssert maxSize <= GOSSIP_MAX_SIZE_BELLATRIX
|
|
maxSize.uint32
|
|
|
|
proc readChunkPayload*(conn: Connection, peer: Peer,
|
|
MsgType: type): Future[NetRes[MsgType]] {.async.} =
|
|
let sm = now(chronos.Moment)
|
|
let size =
|
|
try: await conn.readVarint()
|
|
except LPStreamEOFError: #, LPStreamIncompleteError, InvalidVarintError
|
|
# TODO compiler error - haha, uncaught exception
|
|
# Error: unhandled exception: closureiters.nim(322, 17) `c[i].kind == nkType` [AssertionError]
|
|
return neterr UnexpectedEOF
|
|
except LPStreamIncompleteError:
|
|
return neterr UnexpectedEOF
|
|
except InvalidVarintError:
|
|
return neterr InvalidSizePrefix
|
|
|
|
const maxSize = chunkMaxSize[MsgType]()
|
|
if size > maxSize:
|
|
return neterr SizePrefixOverflow
|
|
if size == 0:
|
|
return neterr ZeroSizePrefix
|
|
|
|
# The `size.int` conversion is safe because `size` is bounded to `MAX_CHUNK_SIZE`
|
|
let data = await conn.uncompressFramedStream(size.int)
|
|
if data.isOk:
|
|
# `10` is the maximum size of variable integer on wire, so error could
|
|
# not be significant.
|
|
peer.updateNetThroughput(now(chronos.Moment) - sm,
|
|
uint64(10 + size))
|
|
return ok SSZ.decode(data.get(), MsgType)
|
|
else:
|
|
debug "Snappy decompression/read failed", msg = $data.error, conn
|
|
return neterr InvalidSnappyBytes
|
|
|
|
proc readResponseChunk(
|
|
conn: Connection, peer: Peer, MsgType: typedesc):
|
|
Future[NetRes[MsgType]] {.async.} =
|
|
mixin readChunkPayload
|
|
|
|
try:
|
|
var responseCodeByte: byte
|
|
try:
|
|
await conn.readExactly(addr responseCodeByte, 1)
|
|
except LPStreamEOFError, LPStreamIncompleteError:
|
|
return neterr PotentiallyExpectedEOF
|
|
|
|
static: assert ResponseCode.low.ord == 0
|
|
if responseCodeByte > ResponseCode.high.byte:
|
|
return neterr InvalidResponseCode
|
|
|
|
let responseCode = ResponseCode responseCodeByte
|
|
case responseCode:
|
|
of InvalidRequest, ServerError, ResourceUnavailable:
|
|
let
|
|
errorMsgChunk = await readChunkPayload(conn, peer, ErrorMsg)
|
|
errorMsg = if errorMsgChunk.isOk: errorMsgChunk.value
|
|
else: return err(errorMsgChunk.error)
|
|
errorMsgStr = toPrettyString(errorMsg.asSeq)
|
|
debug "Error response from peer", responseCode, errMsg = errorMsgStr
|
|
return err Eth2NetworkingError(kind: ReceivedErrorResponse,
|
|
responseCode: responseCode,
|
|
errorMsg: errorMsgStr)
|
|
of Success:
|
|
discard
|
|
|
|
return await readChunkPayload(conn, peer, MsgType)
|
|
|
|
except LPStreamEOFError, LPStreamIncompleteError:
|
|
return neterr UnexpectedEOF
|
|
|
|
proc readResponse(conn: Connection, peer: Peer,
|
|
MsgType: type, timeout: Duration): Future[NetRes[MsgType]] {.async.} =
|
|
when MsgType is List:
|
|
type E = MsgType.T
|
|
var results: MsgType
|
|
while true:
|
|
# Because we interleave networking with response processing, it may
|
|
# happen that reading all chunks takes longer than a strict dealine
|
|
# timeout would allow, so we allow each chunk a new timeout instead.
|
|
# The problem is exacerbated by the large number of round-trips to the
|
|
# poll loop that each future along the way causes.
|
|
trace "reading chunk", conn
|
|
let nextFut = conn.readResponseChunk(peer, E)
|
|
if not await nextFut.withTimeout(timeout):
|
|
return neterr(ReadResponseTimeout)
|
|
let nextRes = nextFut.read()
|
|
if nextRes.isErr:
|
|
if nextRes.error.kind == PotentiallyExpectedEOF:
|
|
trace "EOF chunk", conn, err = nextRes.error
|
|
|
|
return ok results
|
|
trace "Error chunk", conn, err = nextRes.error
|
|
|
|
return err nextRes.error
|
|
else:
|
|
trace "Got chunk", conn
|
|
if not results.add nextRes.value:
|
|
return neterr(ResponseChunkOverflow)
|
|
else:
|
|
let nextFut = conn.readResponseChunk(peer, MsgType)
|
|
if not await nextFut.withTimeout(timeout):
|
|
return neterr(ReadResponseTimeout)
|
|
return nextFut.read()
|
|
|
|
proc makeEth2Request(peer: Peer, protocolId: string, requestBytes: Bytes,
|
|
ResponseMsg: type,
|
|
timeout: Duration): Future[NetRes[ResponseMsg]]
|
|
{.async.} =
|
|
let deadline = sleepAsync timeout
|
|
let stream = awaitWithTimeout(peer.network.openStream(peer, protocolId),
|
|
deadline): return neterr StreamOpenTimeout
|
|
try:
|
|
# Send the request
|
|
# Some clients don't want a length sent for empty requests
|
|
# So don't send anything on empty requests
|
|
if requestBytes.len > 0:
|
|
await stream.writeChunk(none ResponseCode, requestBytes)
|
|
# Half-close the stream to mark the end of the request - if this is not
|
|
# done, the other peer might never send us the response.
|
|
await stream.close()
|
|
|
|
nbc_reqresp_messages_sent.inc(1, [shortProtocolId(protocolId)])
|
|
|
|
# Read the response
|
|
let res = await readResponse(stream, peer, ResponseMsg, timeout)
|
|
if res.isErr():
|
|
if res.error().kind in ProtocolViolations:
|
|
peer.updateScore(PeerScoreInvalidRequest)
|
|
else:
|
|
peer.updateScore(PeerScorePoorRequest)
|
|
return res
|
|
except SerializationError as exc:
|
|
# Yay for both exceptions and results!
|
|
peer.updateScore(PeerScoreInvalidRequest)
|
|
raise exc
|
|
finally:
|
|
await stream.closeWithEOF()
|
|
|
|
proc init*(T: type MultipleChunksResponse, peer: Peer, conn: Connection): T =
|
|
T(UntypedResponse(peer: peer, stream: conn))
|
|
|
|
proc init*[MsgType](T: type SingleChunkResponse[MsgType],
|
|
peer: Peer, conn: Connection): T =
|
|
T(UntypedResponse(peer: peer, stream: conn))
|
|
|
|
template write*[M; maxLen: static Limit](
|
|
r: MultipleChunksResponse[M, maxLen], val: M,
|
|
contextBytes: openArray[byte] = []): untyped =
|
|
mixin sendResponseChunk
|
|
sendResponseChunk(UntypedResponse(r), val, contextBytes)
|
|
|
|
template writeSSZ*[M; maxLen: static Limit](
|
|
r: MultipleChunksResponse[M, maxLen], val: auto,
|
|
contextBytes: openArray[byte] = []): untyped =
|
|
mixin sendResponseChunk
|
|
sendResponseChunk(UntypedResponse(r), val, contextBytes)
|
|
|
|
template writeBytesSZ*(
|
|
r: MultipleChunksResponse, uncompressedLen: uint64,
|
|
bytes: openArray[byte], contextBytes: openArray[byte]): untyped =
|
|
sendResponseChunkBytesSZ(UntypedResponse(r), uncompressedLen, bytes, contextBytes)
|
|
|
|
template send*[M](
|
|
r: SingleChunkResponse[M], val: M,
|
|
contextBytes: openArray[byte] = []): untyped =
|
|
mixin sendResponseChunk
|
|
doAssert UntypedResponse(r).writtenChunks == 0
|
|
sendResponseChunk(UntypedResponse(r), val, contextBytes)
|
|
|
|
template sendSSZ*[M](
|
|
r: SingleChunkResponse[M], val: auto,
|
|
contextBytes: openArray[byte] = []): untyped =
|
|
mixin sendResponseChunk
|
|
doAssert UntypedResponse(r).writtenChunks == 0
|
|
sendResponseChunk(UntypedResponse(r), val, contextBytes)
|
|
|
|
proc performProtocolHandshakes(peer: Peer, incoming: bool) {.async.} =
|
|
# Loop down serially because it's easier to reason about the connection state
|
|
# when there are fewer async races, specially during setup
|
|
for protocol in allProtocols:
|
|
if protocol.onPeerConnected != nil:
|
|
await protocol.onPeerConnected(peer, incoming)
|
|
|
|
proc initProtocol(name: string,
|
|
peerInit: PeerStateInitializer,
|
|
networkInit: NetworkStateInitializer): ProtocolInfoObj =
|
|
ProtocolInfoObj(
|
|
name: name,
|
|
messages: @[],
|
|
peerStateInitializer: peerInit,
|
|
networkStateInitializer: networkInit)
|
|
|
|
proc registerProtocol(protocol: ProtocolInfo) =
|
|
# TODO: This can be done at compile-time in the future
|
|
let pos = lowerBound(gProtocols, protocol)
|
|
gProtocols.insert(protocol, pos)
|
|
for i in 0 ..< gProtocols.len:
|
|
gProtocols[i].index = i
|
|
|
|
proc setEventHandlers(p: ProtocolInfo,
|
|
onPeerConnected: OnPeerConnectedHandler,
|
|
onPeerDisconnected: OnPeerDisconnectedHandler) =
|
|
p.onPeerConnected = onPeerConnected
|
|
p.onPeerDisconnected = onPeerDisconnected
|
|
|
|
proc implementSendProcBody(sendProc: SendProc) =
|
|
let
|
|
msg = sendProc.msg
|
|
UntypedResponse = bindSym "UntypedResponse"
|
|
|
|
proc sendCallGenerator(peer, bytes: NimNode): NimNode =
|
|
if msg.kind != msgResponse:
|
|
let msgProto = getRequestProtoName(msg.procDef)
|
|
case msg.kind
|
|
of msgRequest:
|
|
let ResponseRecord = msg.response.recName
|
|
quote:
|
|
makeEth2Request(`peer`, `msgProto`, `bytes`,
|
|
`ResponseRecord`, `timeoutVar`)
|
|
else:
|
|
quote: sendNotificationMsg(`peer`, `msgProto`, `bytes`)
|
|
else:
|
|
quote: sendResponseChunkBytes(`UntypedResponse`(`peer`), `bytes`)
|
|
|
|
sendProc.useStandardBody(nil, nil, sendCallGenerator)
|
|
|
|
proc handleIncomingStream(network: Eth2Node,
|
|
conn: Connection,
|
|
protocolId: string,
|
|
MsgType: type) {.async.} =
|
|
mixin callUserHandler, RecType
|
|
|
|
type MsgRec = RecType(MsgType)
|
|
const msgName {.used.} = typetraits.name(MsgType)
|
|
|
|
## Uncomment this to enable tracing on all incoming requests
|
|
## You can include `msgNameLit` in the condition to select
|
|
## more specific requests:
|
|
# when chronicles.runtimeFilteringEnabled:
|
|
# setLogLevel(LogLevel.TRACE)
|
|
# defer: setLogLevel(LogLevel.DEBUG)
|
|
# trace "incoming " & `msgNameLit` & " conn"
|
|
|
|
let peer = peerFromStream(network, conn)
|
|
try:
|
|
case peer.connectionState
|
|
of Disconnecting, Disconnected, None:
|
|
# We got incoming stream request while disconnected or disconnecting.
|
|
debug "Got incoming request from disconnected peer", peer = peer,
|
|
message = msgName
|
|
await conn.closeWithEOF()
|
|
return
|
|
of Connecting:
|
|
# We got incoming stream request while handshake is not yet finished,
|
|
# TODO: We could check it here.
|
|
debug "Got incoming request from peer while in handshake", peer = peer,
|
|
msgName
|
|
of Connected:
|
|
# We got incoming stream from peer with proper connection state.
|
|
debug "Got incoming request from peer", peer = peer, msgName
|
|
|
|
template returnInvalidRequest(msg: ErrorMsg) =
|
|
peer.updateScore(PeerScoreInvalidRequest)
|
|
await sendErrorResponse(peer, conn, InvalidRequest, msg)
|
|
return
|
|
|
|
template returnInvalidRequest(msg: string) =
|
|
returnInvalidRequest(ErrorMsg msg.toBytes)
|
|
|
|
template returnResourceUnavailable(msg: ErrorMsg) =
|
|
await sendErrorResponse(peer, conn, ResourceUnavailable, msg)
|
|
return
|
|
|
|
template returnResourceUnavailable(msg: string) =
|
|
returnResourceUnavailable(ErrorMsg msg.toBytes)
|
|
|
|
nbc_reqresp_messages_received.inc(1, [shortProtocolId(protocolId)])
|
|
|
|
# TODO(zah) The TTFB timeout is not implemented in LibP2P streams back-end
|
|
let deadline = sleepAsync RESP_TIMEOUT
|
|
|
|
const isEmptyMsg = when MsgRec is object:
|
|
# We need nested `when` statements here, because Nim doesn't properly
|
|
# apply boolean short-circuit logic at compile time and this causes
|
|
# `totalSerializedFields` to be applied to non-object types that it
|
|
# doesn't know how to support.
|
|
when totalSerializedFields(MsgRec) == 0: true
|
|
else: false
|
|
else:
|
|
false
|
|
|
|
let msg =
|
|
try:
|
|
when isEmptyMsg:
|
|
NetRes[MsgRec].ok default(MsgRec)
|
|
else:
|
|
awaitWithTimeout(
|
|
readChunkPayload(conn, peer, MsgRec), deadline):
|
|
# Timeout, e.g., cancellation due to fulfillment by different peer.
|
|
# Treat this similarly to `UnexpectedEOF`, `PotentiallyExpectedEOF`.
|
|
nbc_reqresp_messages_failed.inc(1, [shortProtocolId(protocolId)])
|
|
await sendErrorResponse(
|
|
peer, conn, InvalidRequest,
|
|
errorMsgLit "Request full data not sent in time")
|
|
return
|
|
|
|
except SerializationError as err:
|
|
nbc_reqresp_messages_failed.inc(1, [shortProtocolId(protocolId)])
|
|
returnInvalidRequest err.formatMsg("msg")
|
|
|
|
except SnappyError as err:
|
|
nbc_reqresp_messages_failed.inc(1, [shortProtocolId(protocolId)])
|
|
returnInvalidRequest err.msg
|
|
finally:
|
|
# The request quota is shared between all requests - it represents the
|
|
# cost to perform a service on behalf of a client and is incurred
|
|
# regardless if the request succeeds or fails - we don't count waiting
|
|
# for this quota against timeouts so as not to prematurely disconnect
|
|
# clients that are on the edge - nonetheless, the client will count it.
|
|
|
|
# When a client exceeds their quota, they will be slowed down without
|
|
# notification - as long as they don't make parallel requests (which is
|
|
# limited by libp2p), this will naturally adapt them to the available
|
|
# quota.
|
|
|
|
# Note that the `msg` will be stored in memory while we wait for the
|
|
# quota to be available. The amount of such messages in memory is
|
|
# bounded by the libp2p limit of parallel streams
|
|
|
|
# This quota also applies to invalid requests thanks to the use of
|
|
# `finally`.
|
|
|
|
awaitQuota(peer, libp2pRequestCost, shortProtocolId(protocolId))
|
|
|
|
if msg.isErr:
|
|
if msg.error.kind in ProtocolViolations:
|
|
peer.updateScore(PeerScoreInvalidRequest)
|
|
else:
|
|
peer.updateScore(PeerScorePoorRequest)
|
|
|
|
nbc_reqresp_messages_failed.inc(1, [shortProtocolId(protocolId)])
|
|
let (responseCode, errMsg) = case msg.error.kind
|
|
of UnexpectedEOF, PotentiallyExpectedEOF:
|
|
nbc_reqresp_messages_failed.inc(1, [shortProtocolId(protocolId)])
|
|
(InvalidRequest, errorMsgLit "Incomplete request")
|
|
|
|
of InvalidContextBytes:
|
|
(ServerError, errorMsgLit "Unrecognized context bytes")
|
|
|
|
of InvalidSnappyBytes:
|
|
(InvalidRequest, errorMsgLit "Failed to decompress snappy payload")
|
|
|
|
of InvalidSszBytes:
|
|
(InvalidRequest, errorMsgLit "Failed to decode SSZ payload")
|
|
|
|
of InvalidSizePrefix:
|
|
(InvalidRequest, errorMsgLit "Invalid chunk size prefix")
|
|
|
|
of ZeroSizePrefix:
|
|
(InvalidRequest, errorMsgLit "The request chunk cannot have a size of zero")
|
|
|
|
of SizePrefixOverflow:
|
|
(InvalidRequest, errorMsgLit "The chunk size exceed the maximum allowed")
|
|
|
|
of InvalidResponseCode, ReceivedErrorResponse,
|
|
StreamOpenTimeout, ReadResponseTimeout:
|
|
# These shouldn't be possible in a request, because
|
|
# there are no response codes being read, no stream
|
|
# openings and no reading of responses:
|
|
(ServerError, errorMsgLit "Internal server error")
|
|
|
|
of BrokenConnection:
|
|
return
|
|
|
|
of ResponseChunkOverflow:
|
|
(InvalidRequest, errorMsgLit "Too many chunks in response")
|
|
|
|
await sendErrorResponse(peer, conn, responseCode, errMsg)
|
|
return
|
|
|
|
try:
|
|
logReceivedMsg(peer, MsgType(msg.get))
|
|
await callUserHandler(MsgType, peer, conn, msg.get)
|
|
except InvalidInputsError as err:
|
|
nbc_reqresp_messages_failed.inc(1, [shortProtocolId(protocolId)])
|
|
returnInvalidRequest err.msg
|
|
except ResourceUnavailableError as err:
|
|
returnResourceUnavailable err.msg
|
|
except CatchableError as err:
|
|
nbc_reqresp_messages_failed.inc(1, [shortProtocolId(protocolId)])
|
|
await sendErrorResponse(peer, conn, ServerError, ErrorMsg err.msg.toBytes)
|
|
|
|
except CatchableError as err:
|
|
nbc_reqresp_messages_failed.inc(1, [shortProtocolId(protocolId)])
|
|
debug "Error processing an incoming request", err = err.msg, msgName
|
|
|
|
finally:
|
|
await conn.closeWithEOF()
|
|
discard network.peerPool.checkPeerScore(peer)
|
|
|
|
proc toPeerAddr*(r: enr.TypedRecord,
|
|
proto: IpTransportProtocol): Result[PeerAddr, cstring] =
|
|
if not r.secp256k1.isSome:
|
|
return err("enr: no secp256k1 key in record")
|
|
|
|
let
|
|
pubKey = ? keys.PublicKey.fromRaw(r.secp256k1.get)
|
|
peerId = ? PeerId.init(crypto.PublicKey(
|
|
scheme: Secp256k1, skkey: secp.SkPublicKey(pubKey)))
|
|
|
|
var addrs = newSeq[MultiAddress]()
|
|
|
|
case proto
|
|
of tcpProtocol:
|
|
if r.ip.isSome and r.tcp.isSome:
|
|
let ip = ipv4(r.ip.get)
|
|
addrs.add MultiAddress.init(ip, tcpProtocol, Port r.tcp.get)
|
|
|
|
if r.ip6.isSome:
|
|
let ip = ipv6(r.ip6.get)
|
|
if r.tcp6.isSome:
|
|
addrs.add MultiAddress.init(ip, tcpProtocol, Port r.tcp6.get)
|
|
elif r.tcp.isSome:
|
|
addrs.add MultiAddress.init(ip, tcpProtocol, Port r.tcp.get)
|
|
else:
|
|
discard
|
|
|
|
of udpProtocol:
|
|
if r.ip.isSome and r.udp.isSome:
|
|
let ip = ipv4(r.ip.get)
|
|
addrs.add MultiAddress.init(ip, udpProtocol, Port r.udp.get)
|
|
|
|
if r.ip6.isSome:
|
|
let ip = ipv6(r.ip6.get)
|
|
if r.udp6.isSome:
|
|
addrs.add MultiAddress.init(ip, udpProtocol, Port r.udp6.get)
|
|
elif r.udp.isSome:
|
|
addrs.add MultiAddress.init(ip, udpProtocol, Port r.udp.get)
|
|
else:
|
|
discard
|
|
|
|
if addrs.len == 0:
|
|
return err("enr: no addresses in record")
|
|
|
|
ok(PeerAddr(peerId: peerId, addrs: addrs))
|
|
|
|
proc checkPeer(node: Eth2Node, peerAddr: PeerAddr): bool =
|
|
logScope: peer = peerAddr.peerId
|
|
let peerId = peerAddr.peerId
|
|
if node.peerPool.hasPeer(peerId):
|
|
trace "Already connected"
|
|
false
|
|
else:
|
|
if node.isSeen(peerId):
|
|
trace "Recently connected"
|
|
false
|
|
else:
|
|
true
|
|
|
|
proc dialPeer(node: Eth2Node, peerAddr: PeerAddr, index = 0) {.async.} =
|
|
## Establish connection with remote peer identified by address ``peerAddr``.
|
|
logScope:
|
|
peer = peerAddr.peerId
|
|
index = index
|
|
|
|
if not(node.checkPeer(peerAddr)):
|
|
return
|
|
|
|
debug "Connecting to discovered peer"
|
|
var deadline = sleepAsync(node.connectTimeout)
|
|
var workfut = node.switch.connect(
|
|
peerAddr.peerId,
|
|
peerAddr.addrs,
|
|
forceDial = true
|
|
)
|
|
|
|
try:
|
|
# `or` operation will only raise exception of `workfut`, because `deadline`
|
|
# could not raise exception.
|
|
await workfut or deadline
|
|
if workfut.finished():
|
|
if not deadline.finished():
|
|
deadline.cancel()
|
|
inc nbc_successful_dials
|
|
else:
|
|
debug "Connection to remote peer timed out"
|
|
inc nbc_timeout_dials
|
|
node.addSeen(peerAddr.peerId, SeenTableTimeTimeout)
|
|
await cancelAndWait(workfut)
|
|
except CatchableError as exc:
|
|
debug "Connection to remote peer failed", msg = exc.msg
|
|
inc nbc_failed_dials
|
|
node.addSeen(peerAddr.peerId, SeenTableTimeDeadPeer)
|
|
|
|
proc connectWorker(node: Eth2Node, index: int) {.async.} =
|
|
debug "Connection worker started", index = index
|
|
while true:
|
|
# This loop will never produce HIGH CPU usage because it will wait
|
|
# and block until it not obtains new peer from the queue ``connQueue``.
|
|
let remotePeerAddr = await node.connQueue.popFirst()
|
|
# Previous worker dial might have hit the maximum peers.
|
|
# TODO: could clear the whole connTable and connQueue here also, best
|
|
# would be to have this event based coming from peer pool or libp2p.
|
|
|
|
if node.peerPool.len < node.hardMaxPeers:
|
|
await node.dialPeer(remotePeerAddr, index)
|
|
# Peer was added to `connTable` before adding it to `connQueue`, so we
|
|
# excluding peer here after processing.
|
|
node.connTable.excl(remotePeerAddr.peerId)
|
|
|
|
proc toPeerAddr(node: Node): Result[PeerAddr, cstring] =
|
|
let nodeRecord = ? node.record.toTypedRecord()
|
|
let peerAddr = ? nodeRecord.toPeerAddr(tcpProtocol)
|
|
ok(peerAddr)
|
|
|
|
func isCompatibleForkId*(discoveryForkId: ENRForkID, peerForkId: ENRForkID): bool =
|
|
if discoveryForkId.fork_digest == peerForkId.fork_digest:
|
|
if discoveryForkId.next_fork_version < peerForkId.next_fork_version:
|
|
# Peer knows about a fork and we don't
|
|
true
|
|
elif discoveryForkId.next_fork_version == peerForkId.next_fork_version:
|
|
# We should have the same next_fork_epoch
|
|
discoveryForkId.next_fork_epoch == peerForkId.next_fork_epoch
|
|
|
|
else:
|
|
# Our next fork version is bigger than the peer's one
|
|
false
|
|
else:
|
|
# Wrong fork digest
|
|
false
|
|
|
|
proc queryRandom*(
|
|
d: Eth2DiscoveryProtocol,
|
|
forkId: ENRForkID,
|
|
wantedAttnets: AttnetBits,
|
|
wantedSyncnets: SyncnetBits,
|
|
minScore: int): Future[seq[Node]] {.async.} =
|
|
## Perform a discovery query for a random target
|
|
## (forkId) and matching at least one of the attestation subnets.
|
|
|
|
let nodes = await d.queryRandom()
|
|
|
|
var filtered: seq[(int, Node)]
|
|
for n in nodes:
|
|
var score: int = 0
|
|
|
|
let eth2FieldBytes = n.record.tryGet(enrForkIdField, seq[byte])
|
|
if eth2FieldBytes.isNone():
|
|
continue
|
|
let peerForkId =
|
|
try:
|
|
SSZ.decode(eth2FieldBytes.get(), ENRForkID)
|
|
except SszError as e:
|
|
debug "Could not decode the eth2 field of peer",
|
|
peer = n.record.toURI(), exception = e.name, msg = e.msg
|
|
continue
|
|
|
|
if not forkId.isCompatibleForkId(peerForkId):
|
|
continue
|
|
|
|
let attnetsBytes = n.record.tryGet(enrAttestationSubnetsField, seq[byte])
|
|
if attnetsBytes.isSome():
|
|
let attnetsNode =
|
|
try:
|
|
SSZ.decode(attnetsBytes.get(), AttnetBits)
|
|
except SszError as e:
|
|
debug "Could not decode the attnets ERN bitfield of peer",
|
|
peer = n.record.toURI(), exception = e.name, msg = e.msg
|
|
continue
|
|
|
|
for i in 0..<ATTESTATION_SUBNET_COUNT:
|
|
if wantedAttnets[i] and attnetsNode[i]:
|
|
score += 1
|
|
|
|
let syncnetsBytes = n.record.tryGet(enrSyncSubnetsField, seq[byte])
|
|
if syncnetsBytes.isSome():
|
|
let syncnetsNode =
|
|
try:
|
|
SSZ.decode(syncnetsBytes.get(), SyncnetBits)
|
|
except SszError as e:
|
|
debug "Could not decode the syncnets ENR bitfield of peer",
|
|
peer = n.record.toURI(), exception = e.name, msg = e.msg
|
|
continue
|
|
|
|
for i in SyncSubcommitteeIndex:
|
|
if wantedSyncnets[i] and syncnetsNode[i]:
|
|
score += 10 # connecting to the right syncnet is urgent
|
|
|
|
if score >= minScore:
|
|
filtered.add((score, n))
|
|
|
|
d.rng[].shuffle(filtered)
|
|
return filtered.sortedByIt(-it[0]).mapIt(it[1])
|
|
|
|
proc trimConnections(node: Eth2Node, count: int) =
|
|
# Kill `count` peers, scoring them to remove the least useful ones
|
|
|
|
var scores = initOrderedTable[PeerId, int]()
|
|
|
|
# Take into account the stabilitySubnets
|
|
# During sync, only this will be used to score peers
|
|
# since gossipsub is not running yet
|
|
#
|
|
# A peer subscribed to all stabilitySubnets will
|
|
# have 640 points
|
|
var peersInGracePeriod = 0
|
|
for peer in node.peers.values:
|
|
if peer.connectionState != Connected: continue
|
|
|
|
# Metadata pinger is used as grace period
|
|
if peer.metadata.isNone:
|
|
peersInGracePeriod.inc()
|
|
continue
|
|
|
|
let
|
|
stabilitySubnets = peer.metadata.get().attnets
|
|
stabilitySubnetsCount = stabilitySubnets.countOnes()
|
|
thisPeersScore = 10 * stabilitySubnetsCount
|
|
|
|
scores[peer.peerId] = thisPeersScore
|
|
|
|
|
|
# Safegard: if we have too many peers in the grace
|
|
# period, don't kick anyone. Otherwise, they will be
|
|
# preferred over long-standing peers
|
|
if peersInGracePeriod > scores.len div 2:
|
|
return
|
|
|
|
# Split a 1000 points for each topic's peers
|
|
# + 5 000 points for each subbed topic
|
|
# This gives priority to peers in topics with few peers
|
|
# For instance, a topic with `dHigh` peers will give 80 points to each peer
|
|
# Whereas a topic with `dLow` peers will give 250 points to each peer
|
|
#
|
|
# Then, use the average of all topics per peers, to avoid giving too much
|
|
# point to big peers
|
|
|
|
var gossipScores = initTable[PeerId, tuple[sum: int, count: int]]()
|
|
for topic, _ in node.pubsub.gossipsub:
|
|
let
|
|
peersInMesh = node.pubsub.mesh.peers(topic)
|
|
peersSubbed = node.pubsub.gossipsub.peers(topic)
|
|
scorePerMeshPeer = 5_000 div max(peersInMesh, 1)
|
|
scorePerSubbedPeer = 1_000 div max(peersSubbed, 1)
|
|
|
|
for peer in node.pubsub.gossipsub.getOrDefault(topic):
|
|
if peer.peerId notin scores: continue
|
|
let currentVal = gossipScores.getOrDefault(peer.peerId)
|
|
gossipScores[peer.peerId] = (
|
|
currentVal.sum + scorePerSubbedPeer,
|
|
currentVal.count + 1
|
|
)
|
|
|
|
# Avoid global topics (>75% of peers), which would greatly reduce
|
|
# the average score for small peers
|
|
if peersSubbed > scores.len div 4 * 3: continue
|
|
|
|
for peer in node.pubsub.mesh.getOrDefault(topic):
|
|
if peer.peerId notin scores: continue
|
|
let currentVal = gossipScores.getOrDefault(peer.peerId)
|
|
gossipScores[peer.peerId] = (
|
|
currentVal.sum + scorePerMeshPeer,
|
|
currentVal.count + 1
|
|
)
|
|
|
|
for peerId, gScore in gossipScores:
|
|
scores[peerId] =
|
|
scores.getOrDefault(peerId) + (gScore.sum div gScore.count)
|
|
|
|
proc sortPerScore(a, b: (PeerId, int)): int =
|
|
system.cmp(a[1], b[1])
|
|
|
|
scores.sort(sortPerScore)
|
|
|
|
var toKick = count
|
|
|
|
for peerId in scores.keys:
|
|
debug "kicking peer", peerId, score=scores[peerId]
|
|
asyncSpawn node.getPeer(peerId).disconnect(PeerScoreLow)
|
|
dec toKick
|
|
inc(nbc_cycling_kicked_peers)
|
|
if toKick <= 0: return
|
|
|
|
proc getLowSubnets(node: Eth2Node, epoch: Epoch): (AttnetBits, SyncnetBits) =
|
|
# Returns the subnets required to have a healthy mesh
|
|
# The subnets are computed, to, in order:
|
|
# - Have 0 subnet with < `dLow` peers from topic subscription
|
|
# - Have 0 subscribed subnet below `dLow`
|
|
# - Have 0 subscribed subnet below `dOut` outgoing peers
|
|
# - Have 0 subnet with < `dHigh` peers from topic subscription
|
|
|
|
nbc_gossipsub_low_fanout.set(0)
|
|
nbc_gossipsub_good_fanout.set(0)
|
|
nbc_gossipsub_healthy_fanout.set(0)
|
|
|
|
template findLowSubnets(topicNameGenerator: untyped,
|
|
SubnetIdType: type,
|
|
totalSubnets: static int): auto =
|
|
var
|
|
lowOutgoingSubnets: BitArray[totalSubnets]
|
|
notHighOutgoingSubnets: BitArray[totalSubnets]
|
|
belowDSubnets: BitArray[totalSubnets]
|
|
belowDOutSubnets: BitArray[totalSubnets]
|
|
|
|
for subNetId in 0 ..< totalSubnets:
|
|
let topic =
|
|
topicNameGenerator(node.forkId.fork_digest, SubnetIdType(subNetId))
|
|
|
|
if node.pubsub.gossipsub.peers(topic) < node.pubsub.parameters.dLow:
|
|
lowOutgoingSubnets.setBit(subNetId)
|
|
|
|
if node.pubsub.gossipsub.peers(topic) < node.pubsub.parameters.dHigh:
|
|
notHighOutgoingSubnets.setBit(subNetId)
|
|
|
|
# Not subscribed
|
|
if topic notin node.pubsub.mesh: continue
|
|
|
|
if node.pubsub.mesh.peers(topic) < node.pubsub.parameters.dLow:
|
|
belowDSubnets.setBit(subNetId)
|
|
|
|
let outPeers = node.pubsub.mesh.getOrDefault(topic).countIt(it.outbound)
|
|
if outPeers < node.pubsub.parameters.dOut:
|
|
belowDOutSubnets.setBit(subNetId)
|
|
|
|
nbc_gossipsub_low_fanout.inc(int64(lowOutgoingSubnets.countOnes()))
|
|
nbc_gossipsub_good_fanout.inc(int64(
|
|
notHighOutgoingSubnets.countOnes() -
|
|
lowOutgoingSubnets.countOnes()
|
|
))
|
|
nbc_gossipsub_healthy_fanout.inc(int64(
|
|
totalSubnets - notHighOutgoingSubnets.countOnes()))
|
|
|
|
if lowOutgoingSubnets.countOnes() > 0:
|
|
lowOutgoingSubnets
|
|
elif belowDSubnets.countOnes() > 0:
|
|
belowDSubnets
|
|
elif belowDOutSubnets.countOnes() > 0:
|
|
belowDOutSubnets
|
|
else:
|
|
notHighOutgoingSubnets
|
|
|
|
return (
|
|
findLowSubnets(getAttestationTopic, SubnetId, ATTESTATION_SUBNET_COUNT.int),
|
|
# We start looking one epoch before the transition in order to allow
|
|
# some time for the gossip meshes to get healthy:
|
|
if epoch + 1 >= node.cfg.ALTAIR_FORK_EPOCH:
|
|
findLowSubnets(getSyncCommitteeTopic, SyncSubcommitteeIndex, SYNC_COMMITTEE_SUBNET_COUNT)
|
|
else:
|
|
default(SyncnetBits)
|
|
)
|
|
|
|
proc runDiscoveryLoop(node: Eth2Node) {.async.} =
|
|
debug "Starting discovery loop"
|
|
|
|
while true:
|
|
let
|
|
currentEpoch = node.getBeaconTime().slotOrZero.epoch
|
|
(wantedAttnets, wantedSyncnets) = node.getLowSubnets(currentEpoch)
|
|
wantedAttnetsCount = wantedAttnets.countOnes()
|
|
wantedSyncnetsCount = wantedSyncnets.countOnes()
|
|
outgoingPeers = node.peerPool.lenCurrent({PeerType.Outgoing})
|
|
targetOutgoingPeers = max(node.wantedPeers div 10, 3)
|
|
|
|
if wantedAttnetsCount > 0 or wantedSyncnetsCount > 0 or
|
|
outgoingPeers < targetOutgoingPeers:
|
|
|
|
let
|
|
minScore =
|
|
if wantedAttnetsCount > 0 or wantedSyncnetsCount > 0:
|
|
1
|
|
else:
|
|
0
|
|
discoveredNodes = await node.discovery.queryRandom(
|
|
node.discoveryForkId, wantedAttnets, wantedSyncnets, minScore)
|
|
|
|
let newPeers = block:
|
|
var np = newSeq[PeerAddr]()
|
|
for discNode in discoveredNodes:
|
|
let res = discNode.toPeerAddr()
|
|
if res.isErr():
|
|
debug "Failed to decode discovery's node address",
|
|
node = discNode, errMsg = res.error
|
|
continue
|
|
|
|
let peerAddr = res.get()
|
|
if node.checkPeer(peerAddr) and
|
|
peerAddr.peerId notin node.connTable:
|
|
np.add(peerAddr)
|
|
np
|
|
|
|
let
|
|
roomCurrent = node.hardMaxPeers - len(node.peerPool)
|
|
peersToKick = min(newPeers.len - roomCurrent, node.hardMaxPeers div 5)
|
|
|
|
if peersToKick > 0 and newPeers.len > 0:
|
|
node.trimConnections(peersToKick)
|
|
|
|
for peerAddr in newPeers:
|
|
# We adding to pending connections table here, but going
|
|
# to remove it only in `connectWorker`.
|
|
node.connTable.incl(peerAddr.peerId)
|
|
await node.connQueue.addLast(peerAddr)
|
|
|
|
debug "Discovery tick",
|
|
wanted_peers = node.wantedPeers,
|
|
current_peers = len(node.peerPool),
|
|
discovered_nodes = len(discoveredNodes),
|
|
new_peers = len(newPeers)
|
|
|
|
if len(newPeers) == 0:
|
|
let currentPeers = len(node.peerPool)
|
|
if currentPeers <= node.wantedPeers shr 2: # 25%
|
|
warn "Peer count low, no new peers discovered",
|
|
discovered_nodes = len(discoveredNodes), new_peers = newPeers,
|
|
current_peers = currentPeers, wanted_peers = node.wantedPeers
|
|
|
|
# Discovery `queryRandom` can have a synchronous fast path for example
|
|
# when no peers are in the routing table. Don't run it in continuous loop.
|
|
#
|
|
# Also, give some time to dial the discovered nodes and update stats etc
|
|
await sleepAsync(5.seconds)
|
|
|
|
proc resolvePeer(peer: Peer) =
|
|
# Resolve task which performs searching of peer's public key and recovery of
|
|
# ENR using discovery5. We only resolve ENR for peers we know about to avoid
|
|
# querying the network - as of now, the ENR is not needed, except for
|
|
# debuggging
|
|
logScope: peer = peer.peerId
|
|
let startTime = now(chronos.Moment)
|
|
let nodeId =
|
|
block:
|
|
var key: PublicKey
|
|
# `secp256k1` keys are always stored inside PeerId.
|
|
discard peer.peerId.extractPublicKey(key)
|
|
keys.PublicKey.fromRaw(key.skkey.getBytes()).get().toNodeId()
|
|
|
|
debug "Peer's ENR recovery task started", node_id = $nodeId
|
|
|
|
# This is "fast-path" for peers which was dialed. In this case discovery
|
|
# already has most recent ENR information about this peer.
|
|
let gnode = peer.network.discovery.getNode(nodeId)
|
|
if gnode.isSome():
|
|
peer.enr = some(gnode.get().record)
|
|
inc(nbc_successful_discoveries)
|
|
let delay = now(chronos.Moment) - startTime
|
|
nbc_resolve_time.observe(delay.toFloatSeconds())
|
|
debug "Peer's ENR recovered", delay
|
|
|
|
proc handlePeer*(peer: Peer) {.async.} =
|
|
let res = peer.network.peerPool.addPeerNoWait(peer, peer.direction)
|
|
case res:
|
|
of PeerStatus.LowScoreError, PeerStatus.NoSpaceError:
|
|
# Peer has low score or we do not have enough space in PeerPool,
|
|
# we are going to disconnect it gracefully.
|
|
# Peer' state will be updated in connection event.
|
|
debug "Peer has low score or there no space in PeerPool",
|
|
peer = peer, reason = res
|
|
await peer.disconnect(FaultOrError)
|
|
of PeerStatus.DeadPeerError:
|
|
# Peer's lifetime future is finished, so its already dead,
|
|
# we do not need to perform gracefull disconect.
|
|
# Peer's state will be updated in connection event.
|
|
discard
|
|
of PeerStatus.DuplicateError:
|
|
# Peer is already present in PeerPool, we can't perform disconnect,
|
|
# because in such case we could kill both connections (connection
|
|
# which is present in PeerPool and new one).
|
|
# This is possible bug, because we could enter here only if number
|
|
# of `peer.connections == 1`, it means that Peer's lifetime is not
|
|
# tracked properly and we still not received `Disconnected` event.
|
|
debug "Peer is already present in PeerPool", peer = peer
|
|
of PeerStatus.Success:
|
|
# Peer was added to PeerPool.
|
|
peer.score = NewPeerScore
|
|
peer.connectionState = Connected
|
|
# We spawn task which will obtain ENR for this peer.
|
|
resolvePeer(peer)
|
|
debug "Peer successfully connected", peer = peer,
|
|
connections = peer.connections
|
|
|
|
proc onConnEvent(node: Eth2Node, peerId: PeerId, event: ConnEvent) {.async.} =
|
|
let peer = node.getPeer(peerId)
|
|
case event.kind
|
|
of ConnEventKind.Connected:
|
|
inc peer.connections
|
|
debug "Peer connection upgraded", peer = $peerId,
|
|
connections = peer.connections
|
|
if peer.connections == 1:
|
|
# Libp2p may connect multiple times to the same peer - using different
|
|
# transports for both incoming and outgoing. For now, we'll count our
|
|
# "fist" encounter with the peer as the true connection, leaving the
|
|
# other connections be - libp2p limits the number of concurrent
|
|
# connections to the same peer, and only one of these connections will be
|
|
# active. Nonetheless, this quirk will cause a number of odd behaviours:
|
|
# * For peer limits, we might miscount the incoming vs outgoing quota
|
|
# * Protocol handshakes are wonky: we'll not necessarily use the newly
|
|
# connected transport - instead we'll just pick a random one!
|
|
case peer.connectionState
|
|
of Disconnecting:
|
|
# We got connection with peer which we currently disconnecting.
|
|
# Normally this does not happen, but if a peer is being disconnected
|
|
# while a concurrent (incoming for example) connection attempt happens,
|
|
# we might end up here
|
|
debug "Got connection attempt from peer that we are disconnecting",
|
|
peer = peerId
|
|
await node.switch.disconnect(peerId)
|
|
return
|
|
of None:
|
|
# We have established a connection with the new peer.
|
|
peer.connectionState = Connecting
|
|
of Disconnected:
|
|
# We have established a connection with the peer that we have seen
|
|
# before - reusing the existing peer object is fine
|
|
peer.connectionState = Connecting
|
|
peer.score = 0 # Will be set to NewPeerScore after handshake
|
|
of Connecting, Connected:
|
|
# This means that we got notification event from peer which we already
|
|
# connected or connecting right now. If this situation will happened,
|
|
# it means bug on `nim-libp2p` side.
|
|
warn "Got connection attempt from peer which we already connected",
|
|
peer = peerId
|
|
await peer.disconnect(FaultOrError)
|
|
return
|
|
|
|
# Store connection direction inside Peer object.
|
|
if event.incoming:
|
|
peer.direction = PeerType.Incoming
|
|
else:
|
|
peer.direction = PeerType.Outgoing
|
|
|
|
await performProtocolHandshakes(peer, event.incoming)
|
|
|
|
of ConnEventKind.Disconnected:
|
|
dec peer.connections
|
|
debug "Lost connection to peer", peer = peerId,
|
|
connections = peer.connections
|
|
|
|
if peer.connections == 0:
|
|
debug "Peer disconnected", peer = $peerId, connections = peer.connections
|
|
|
|
# Whatever caused disconnection, avoid connection spamming
|
|
node.addSeen(peerId, SeenTableTimeReconnect)
|
|
|
|
let fut = peer.disconnectedFut
|
|
if not(isNil(fut)):
|
|
fut.complete()
|
|
peer.disconnectedFut = nil
|
|
else:
|
|
# TODO (cheatfate): This could be removed when bug will be fixed inside
|
|
# `nim-libp2p`.
|
|
debug "Got new event while peer is already disconnected",
|
|
peer = peerId, peer_state = peer.connectionState
|
|
peer.connectionState = Disconnected
|
|
|
|
proc new(T: type Eth2Node,
|
|
config: BeaconNodeConf | LightClientConf, runtimeCfg: RuntimeConfig,
|
|
enrForkId: ENRForkID, discoveryForkId: ENRForkID,
|
|
forkDigests: ref ForkDigests, getBeaconTime: GetBeaconTimeFn,
|
|
switch: Switch, pubsub: GossipSub,
|
|
ip: Option[ValidIpAddress], tcpPort, udpPort: Option[Port],
|
|
privKey: keys.PrivateKey, discovery: bool,
|
|
rng: ref HmacDrbgContext): T {.raises: [Defect, CatchableError].} =
|
|
when not defined(local_testnet):
|
|
let
|
|
connectTimeout = chronos.minutes(1)
|
|
seenThreshold = chronos.minutes(5)
|
|
else:
|
|
let
|
|
connectTimeout = chronos.seconds(10)
|
|
seenThreshold = chronos.seconds(10)
|
|
type MetaData = altair.MetaData # Weird bug without this..
|
|
|
|
# Versions up to v22.3.0 would write an empty `MetaData` to
|
|
#`data-dir/node-metadata.json` which would then be reloaded on startup - don't
|
|
# write a file with this name or downgrades will break!
|
|
const metadata = MetaData()
|
|
|
|
let node = T(
|
|
switch: switch,
|
|
pubsub: pubsub,
|
|
wantedPeers: config.maxPeers,
|
|
hardMaxPeers: config.hardMaxPeers.get(config.maxPeers * 3 div 2), #*1.5
|
|
cfg: runtimeCfg,
|
|
peerPool: newPeerPool[Peer, PeerId](),
|
|
# Its important here to create AsyncQueue with limited size, otherwise
|
|
# it could produce HIGH cpu usage.
|
|
connQueue: newAsyncQueue[PeerAddr](ConcurrentConnections),
|
|
metadata: metadata,
|
|
forkId: enrForkId,
|
|
discoveryForkId: discoveryForkId,
|
|
forkDigests: forkDigests,
|
|
getBeaconTime: getBeaconTime,
|
|
discovery: Eth2DiscoveryProtocol.new(
|
|
config, ip, tcpPort, udpPort, privKey,
|
|
{
|
|
enrForkIdField: SSZ.encode(enrForkId),
|
|
enrAttestationSubnetsField: SSZ.encode(metadata.attnets)
|
|
},
|
|
rng),
|
|
discoveryEnabled: discovery,
|
|
rng: rng,
|
|
connectTimeout: connectTimeout,
|
|
seenThreshold: seenThreshold,
|
|
quota: TokenBucket.new(maxGlobalQuota, fullReplenishTime)
|
|
)
|
|
|
|
newSeq node.protocolStates, allProtocols.len
|
|
for proto in allProtocols:
|
|
if proto.networkStateInitializer != nil:
|
|
node.protocolStates[proto.index] = proto.networkStateInitializer(node)
|
|
|
|
for msg in proto.messages:
|
|
when config is BeaconNodeConf:
|
|
if msg.isLightClientRequest and not config.lightClientDataServe:
|
|
continue
|
|
elif config is LightClientConf:
|
|
if not msg.isRequired:
|
|
continue
|
|
if msg.protocolMounter != nil:
|
|
msg.protocolMounter node
|
|
|
|
proc peerHook(peerId: PeerId, event: ConnEvent): Future[void] {.gcsafe.} =
|
|
onConnEvent(node, peerId, event)
|
|
|
|
switch.addConnEventHandler(peerHook, ConnEventKind.Connected)
|
|
switch.addConnEventHandler(peerHook, ConnEventKind.Disconnected)
|
|
|
|
proc scoreCheck(peer: Peer): bool =
|
|
peer.score >= PeerScoreLowLimit
|
|
|
|
proc onDeletePeer(peer: Peer) =
|
|
if peer.connectionState notin {ConnectionState.Disconnecting,
|
|
ConnectionState.Disconnected}:
|
|
if peer.score < PeerScoreLowLimit:
|
|
debug "Peer was removed from PeerPool due to low score", peer = peer,
|
|
peer_score = peer.score, score_low_limit = PeerScoreLowLimit,
|
|
score_high_limit = PeerScoreHighLimit
|
|
asyncSpawn(peer.disconnect(PeerScoreLow))
|
|
else:
|
|
debug "Peer was removed from PeerPool", peer = peer,
|
|
peer_score = peer.score, score_low_limit = PeerScoreLowLimit,
|
|
score_high_limit = PeerScoreHighLimit
|
|
asyncSpawn(peer.disconnect(FaultOrError)) # Shouldn't actually happen!
|
|
|
|
node.peerPool.setScoreCheck(scoreCheck)
|
|
node.peerPool.setOnDeletePeer(onDeletePeer)
|
|
|
|
node
|
|
|
|
template publicKey(node: Eth2Node): keys.PublicKey =
|
|
node.discovery.privKey.toPublicKey
|
|
|
|
proc startListening*(node: Eth2Node) {.async.} =
|
|
if node.discoveryEnabled:
|
|
try:
|
|
node.discovery.open()
|
|
except CatchableError as err:
|
|
fatal "Failed to start discovery service. UDP port may be already in use",
|
|
err = err.msg
|
|
quit 1
|
|
|
|
try:
|
|
await node.switch.start()
|
|
except CatchableError as err:
|
|
fatal "Failed to start LibP2P transport. TCP port may be already in use",
|
|
err = err.msg
|
|
quit 1
|
|
|
|
proc peerPingerHeartbeat(node: Eth2Node): Future[void] {.gcsafe.}
|
|
proc peerTrimmerHeartbeat(node: Eth2Node): Future[void] {.gcsafe.}
|
|
|
|
proc start*(node: Eth2Node) {.async.} =
|
|
|
|
proc onPeerCountChanged() =
|
|
trace "Number of peers has been changed", length = len(node.peerPool)
|
|
nbc_peers.set int64(len(node.peerPool))
|
|
|
|
node.peerPool.setPeerCounter(onPeerCountChanged)
|
|
|
|
for i in 0 ..< ConcurrentConnections:
|
|
node.connWorkers.add connectWorker(node, i)
|
|
|
|
if node.discoveryEnabled:
|
|
node.discovery.start()
|
|
traceAsyncErrors node.runDiscoveryLoop()
|
|
else:
|
|
notice "Discovery disabled; trying bootstrap nodes",
|
|
nodes = node.discovery.bootstrapRecords.len
|
|
for enr in node.discovery.bootstrapRecords:
|
|
let tr = enr.toTypedRecord()
|
|
if tr.isOk():
|
|
let pa = tr.get().toPeerAddr(tcpProtocol)
|
|
if pa.isOk():
|
|
await node.connQueue.addLast(pa.get())
|
|
node.peerPingerHeartbeatFut = node.peerPingerHeartbeat()
|
|
node.peerTrimmerHeartbeatFut = node.peerTrimmerHeartbeat()
|
|
|
|
proc stop*(node: Eth2Node) {.async.} =
|
|
# Ignore errors in futures, since we're shutting down (but log them on the
|
|
# TRACE level, if a timeout is reached).
|
|
var waitedFutures =
|
|
@[
|
|
node.switch.stop(),
|
|
node.peerPingerHeartbeat.cancelAndWait(),
|
|
node.peerTrimmerHeartbeatFut.cancelAndWait(),
|
|
]
|
|
|
|
if node.discoveryEnabled:
|
|
waitedFutures &= node.discovery.closeWait()
|
|
|
|
let
|
|
timeout = 5.seconds
|
|
completed = await withTimeout(allFutures(waitedFutures), timeout)
|
|
if not completed:
|
|
trace "Eth2Node.stop(): timeout reached", timeout,
|
|
futureErrors = waitedFutures.filterIt(it.error != nil).mapIt(it.error.msg)
|
|
|
|
proc init(T: type Peer, network: Eth2Node, peerId: PeerId): Peer =
|
|
let res = Peer(
|
|
peerId: peerId,
|
|
network: network,
|
|
connectionState: ConnectionState.None,
|
|
lastReqTime: now(chronos.Moment),
|
|
lastMetadataTime: now(chronos.Moment),
|
|
protocolStates: newSeq[RootRef](len(allProtocols)),
|
|
quota: TokenBucket.new(maxRequestQuota.int, fullReplenishTime)
|
|
)
|
|
for i in 0 ..< len(allProtocols):
|
|
let proto = allProtocols[i]
|
|
if not(isNil(proto.peerStateInitializer)):
|
|
res.protocolStates[i] = proto.peerStateInitializer(res)
|
|
res
|
|
|
|
proc registerMsg(protocol: ProtocolInfo,
|
|
name: string,
|
|
mounter: MounterProc,
|
|
libp2pCodecName: string,
|
|
isRequired, isLightClientRequest: bool) =
|
|
protocol.messages.add MessageInfo(name: name,
|
|
protocolMounter: mounter,
|
|
libp2pCodecName: libp2pCodecName,
|
|
isRequired: isRequired,
|
|
isLightClientRequest: isLightClientRequest)
|
|
|
|
proc p2pProtocolBackendImpl*(p: P2PProtocol): Backend =
|
|
var
|
|
Format = ident "SSZ"
|
|
Bool = bindSym "bool"
|
|
Connection = bindSym "Connection"
|
|
Peer = bindSym "Peer"
|
|
Eth2Node = bindSym "Eth2Node"
|
|
registerMsg = bindSym "registerMsg"
|
|
initProtocol = bindSym "initProtocol"
|
|
msgVar = ident "msg"
|
|
networkVar = ident "network"
|
|
callUserHandler = ident "callUserHandler"
|
|
MSG = ident "MSG"
|
|
|
|
p.useRequestIds = false
|
|
p.useSingleRecordInlining = true
|
|
|
|
new result
|
|
|
|
result.PeerType = Peer
|
|
result.NetworkType = Eth2Node
|
|
result.registerProtocol = bindSym "registerProtocol"
|
|
result.setEventHandlers = bindSym "setEventHandlers"
|
|
result.SerializationFormat = Format
|
|
result.RequestResultsWrapper = ident "NetRes"
|
|
|
|
result.implementMsg = proc (msg: p2p_protocol_dsl.Message) =
|
|
if msg.kind == msgResponse:
|
|
return
|
|
|
|
let
|
|
protocol = msg.protocol
|
|
msgName = $msg.ident
|
|
msgNameLit = newLit msgName
|
|
MsgRecName = msg.recName
|
|
MsgStrongRecName = msg.strongRecName
|
|
codecNameLit = getRequestProtoName(msg.procDef)
|
|
isRequiredLit = isRequiredProto(msg.procDef)
|
|
isLightClientRequestLit = isLightClientRequestProto(msg.procDef)
|
|
protocolMounterName = ident(msgName & "Mounter")
|
|
|
|
##
|
|
## Implement the Thunk:
|
|
##
|
|
## The protocol handlers in nim-libp2p receive only a `Connection`
|
|
## parameter and there is no way to access the wider context (such
|
|
## as the current `Switch`). In our handlers, we may need to list all
|
|
## peers in the current network, so we must keep a reference to the
|
|
## network object in the closure environment of the installed handlers.
|
|
##
|
|
## For this reason, we define a `protocol mounter` proc that will
|
|
## initialize the network object by creating handlers bound to the
|
|
## specific network.
|
|
##
|
|
var userHandlerCall = newTree(nnkDiscardStmt)
|
|
|
|
if msg.userHandler != nil:
|
|
var OutputParamType = if msg.kind == msgRequest: msg.outputParamType
|
|
else: nil
|
|
|
|
if OutputParamType == nil:
|
|
userHandlerCall = msg.genUserHandlerCall(msgVar, [peerVar])
|
|
if msg.kind == msgRequest:
|
|
userHandlerCall = newCall(ident"sendUserHandlerResultAsChunkImpl",
|
|
streamVar,
|
|
userHandlerCall)
|
|
else:
|
|
if OutputParamType.kind == nnkVarTy:
|
|
OutputParamType = OutputParamType[0]
|
|
|
|
let isChunkStream = eqIdent(OutputParamType[0], "MultipleChunksResponse")
|
|
msg.response.recName = if isChunkStream:
|
|
newTree(nnkBracketExpr, ident"List", OutputParamType[1], OutputParamType[2])
|
|
else:
|
|
OutputParamType[1]
|
|
|
|
let responseVar = ident("response")
|
|
userHandlerCall = newStmtList(
|
|
newVarStmt(responseVar,
|
|
newCall(ident"init", OutputParamType,
|
|
peerVar, streamVar)),
|
|
msg.genUserHandlerCall(msgVar, [peerVar], outputParam = responseVar))
|
|
|
|
protocol.outRecvProcs.add quote do:
|
|
template `callUserHandler`(`MSG`: type `MsgStrongRecName`,
|
|
`peerVar`: `Peer`,
|
|
`streamVar`: `Connection`,
|
|
`msgVar`: `MsgRecName`): untyped =
|
|
`userHandlerCall`
|
|
|
|
proc `protocolMounterName`(`networkVar`: `Eth2Node`) =
|
|
proc snappyThunk(`streamVar`: `Connection`,
|
|
`protocolVar`: string): Future[void] {.gcsafe.} =
|
|
return handleIncomingStream(`networkVar`, `streamVar`, `protocolVar`,
|
|
`MsgStrongRecName`)
|
|
|
|
mount `networkVar`.switch,
|
|
LPProtocol(codecs: @[`codecNameLit`], handler: snappyThunk)
|
|
|
|
##
|
|
## Implement Senders and Handshake
|
|
##
|
|
if msg.kind == msgHandshake:
|
|
macros.error "Handshake messages are not supported in LibP2P protocols"
|
|
else:
|
|
var sendProc = msg.createSendProc()
|
|
implementSendProcBody sendProc
|
|
|
|
protocol.outProcRegistrations.add(
|
|
newCall(registerMsg,
|
|
protocol.protocolInfoVar,
|
|
msgNameLit,
|
|
protocolMounterName,
|
|
codecNameLit,
|
|
isRequiredLit,
|
|
isLightClientRequestLit))
|
|
|
|
result.implementProtocolInit = proc (p: P2PProtocol): NimNode =
|
|
return newCall(initProtocol, newLit(p.name), p.peerInit, p.netInit)
|
|
|
|
#Must import here because of cyclicity
|
|
import ../sync/sync_protocol
|
|
export sync_protocol
|
|
|
|
proc updatePeerMetadata(node: Eth2Node, peerId: PeerId) {.async.} =
|
|
trace "updating peer metadata", peerId
|
|
|
|
var peer = node.getPeer(peerId)
|
|
|
|
#getMetaData can fail with an exception
|
|
let newMetadata =
|
|
try:
|
|
tryGet(await peer.getMetadata_v2())
|
|
except CatchableError as exc:
|
|
debug "Failed to retrieve metadata from peer!", peerId, msg=exc.msg
|
|
peer.failedMetadataRequests.inc()
|
|
return
|
|
|
|
peer.metadata = some(newMetadata)
|
|
peer.failedMetadataRequests = 0
|
|
peer.lastMetadataTime = Moment.now()
|
|
|
|
const
|
|
# For Phase0, metadata change every +27 hours
|
|
MetadataRequestFrequency = 30.minutes
|
|
MetadataRequestMaxFailures = 3
|
|
|
|
proc peerPingerHeartbeat(node: Eth2Node) {.async.} =
|
|
while true:
|
|
let heartbeatStart_m = Moment.now()
|
|
var updateFutures: seq[Future[void]]
|
|
|
|
for peer in node.peers.values:
|
|
if peer.connectionState != Connected: continue
|
|
|
|
if peer.metadata.isNone or
|
|
heartbeatStart_m - peer.lastMetadataTime > MetadataRequestFrequency:
|
|
updateFutures.add(node.updatePeerMetadata(peer.peerId))
|
|
|
|
await allFutures(updateFutures)
|
|
|
|
for peer in node.peers.values:
|
|
if peer.connectionState != Connected: continue
|
|
|
|
if peer.failedMetadataRequests > MetadataRequestMaxFailures:
|
|
debug "no metadata from peer, kicking it", peer
|
|
asyncSpawn peer.disconnect(PeerScoreLow)
|
|
|
|
await sleepAsync(5.seconds)
|
|
|
|
proc peerTrimmerHeartbeat(node: Eth2Node) {.async.} =
|
|
while true:
|
|
# Peer trimmer
|
|
|
|
# Only count Connected peers
|
|
# (to avoid counting Disconnecting ones)
|
|
var connectedPeers = 0
|
|
for peer in node.peers.values:
|
|
if peer.connectionState == Connected:
|
|
inc connectedPeers
|
|
|
|
let excessPeers = connectedPeers - node.wantedPeers
|
|
if excessPeers > 0:
|
|
# Let chronos take back control every kick
|
|
node.trimConnections(1)
|
|
|
|
await sleepAsync(1.seconds div max(1, excessPeers))
|
|
|
|
func asEthKey*(key: PrivateKey): keys.PrivateKey =
|
|
keys.PrivateKey(key.skkey)
|
|
|
|
proc initAddress(T: type MultiAddress, str: string): T =
|
|
let address = MultiAddress.init(str)
|
|
if IPFS.match(address) and matchPartial(multiaddress.TCP, address):
|
|
result = address
|
|
else:
|
|
raise newException(MultiAddressError,
|
|
"Invalid bootstrap node multi-address")
|
|
|
|
template tcpEndPoint(address, port): auto =
|
|
MultiAddress.init(address, tcpProtocol, port)
|
|
|
|
func initNetKeys(privKey: PrivateKey): NetKeyPair =
|
|
let pubKey = privKey.getPublicKey().expect("working public key from random")
|
|
NetKeyPair(seckey: privKey, pubkey: pubKey)
|
|
|
|
proc getRandomNetKeys*(rng: var HmacDrbgContext): NetKeyPair =
|
|
let privKey = PrivateKey.random(Secp256k1, rng).valueOr:
|
|
fatal "Could not generate random network key file"
|
|
quit QuitFailure
|
|
initNetKeys(privKey)
|
|
|
|
proc getPersistentNetKeys*(
|
|
rng: var HmacDrbgContext,
|
|
dataDir, netKeyFile: string,
|
|
netKeyInsecurePassword: bool,
|
|
allowLoadExisting: bool): NetKeyPair =
|
|
if netKeyFile == "random":
|
|
let
|
|
keys = rng.getRandomNetKeys()
|
|
pres = PeerId.init(keys.pubkey).valueOr:
|
|
fatal "Could not obtain PeerId from network key", error
|
|
quit QuitFailure
|
|
info "Generating new networking key",
|
|
network_public_key = keys.pubkey, network_peer_id = $pres
|
|
keys
|
|
else:
|
|
let
|
|
# Insecure password used only for automated testing.
|
|
insecurePassword =
|
|
if netKeyInsecurePassword:
|
|
some(NetworkInsecureKeyPassword)
|
|
else:
|
|
none[string]()
|
|
|
|
keyPath =
|
|
if isAbsolute(netKeyFile):
|
|
netKeyFile
|
|
else:
|
|
dataDir / netKeyFile
|
|
logScope: key_path = keyPath
|
|
|
|
if fileAccessible(keyPath, {AccessFlags.Find}) and allowLoadExisting:
|
|
info "Network key storage is present, unlocking"
|
|
|
|
let
|
|
privKey = loadNetKeystore(keyPath, insecurePassword).valueOr:
|
|
fatal "Could not load network key file"
|
|
quit QuitFailure
|
|
keys = initNetKeys(privKey)
|
|
info "Network key storage was successfully unlocked",
|
|
network_public_key = keys.pubkey
|
|
keys
|
|
else:
|
|
if allowLoadExisting:
|
|
info "Network key storage is missing, creating a new one",
|
|
key_path = keyPath
|
|
let
|
|
keys = rng.getRandomNetKeys()
|
|
sres = saveNetKeystore(rng, keyPath, keys.seckey, insecurePassword)
|
|
if sres.isErr():
|
|
fatal "Could not create network key file"
|
|
quit QuitFailure
|
|
|
|
info "New network key storage was created",
|
|
network_public_key = keys.pubkey
|
|
keys
|
|
|
|
proc getPersistentNetKeys*(
|
|
rng: var HmacDrbgContext, config: BeaconNodeConf): NetKeyPair =
|
|
case config.cmd
|
|
of BNStartUpCmd.noCommand, BNStartUpCmd.record:
|
|
rng.getPersistentNetKeys(
|
|
string(config.dataDir), config.netKeyFile, config.netKeyInsecurePassword,
|
|
allowLoadExisting = true)
|
|
else:
|
|
rng.getRandomNetKeys()
|
|
|
|
func gossipId(
|
|
data: openArray[byte], phase0Prefix, topic: string): seq[byte] =
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#topics-and-messages
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.2/specs/altair/p2p-interface.md#topics-and-messages
|
|
const
|
|
MESSAGE_DOMAIN_INVALID_SNAPPY = [0x00'u8, 0x00, 0x00, 0x00]
|
|
MESSAGE_DOMAIN_VALID_SNAPPY = [0x01'u8, 0x00, 0x00, 0x00]
|
|
let messageDigest = withEth2Hash:
|
|
h.update(MESSAGE_DOMAIN_VALID_SNAPPY)
|
|
|
|
if not topic.startsWith(phase0Prefix):
|
|
# everything >= altair
|
|
h.update topic.len.uint64.toBytesLE
|
|
h.update topic
|
|
|
|
h.update data
|
|
|
|
messageDigest.data[0..19]
|
|
|
|
proc newBeaconSwitch(config: BeaconNodeConf | LightClientConf,
|
|
seckey: PrivateKey, address: MultiAddress,
|
|
rng: ref HmacDrbgContext): Switch {.raises: [Defect, CatchableError].} =
|
|
SwitchBuilder
|
|
.new()
|
|
.withPrivateKey(seckey)
|
|
.withAddress(address)
|
|
.withRng(rng)
|
|
.withNoise()
|
|
.withMplex(chronos.minutes(5), chronos.minutes(5))
|
|
.withMaxConnections(config.maxPeers)
|
|
.withAgentVersion(config.agentString)
|
|
.withTcpTransport({ServerFlags.ReuseAddr})
|
|
.build()
|
|
|
|
|
|
proc createEth2Node*(rng: ref HmacDrbgContext,
|
|
config: BeaconNodeConf | LightClientConf,
|
|
netKeys: NetKeyPair,
|
|
cfg: RuntimeConfig,
|
|
forkDigests: ref ForkDigests,
|
|
getBeaconTime: GetBeaconTimeFn,
|
|
genesis_validators_root: Eth2Digest): Eth2Node
|
|
{.raises: [Defect, CatchableError].} =
|
|
let
|
|
enrForkId = getENRForkID(
|
|
cfg, getBeaconTime().slotOrZero.epoch, genesis_validators_root)
|
|
|
|
discoveryForkId = getDiscoveryForkID(
|
|
cfg, getBeaconTime().slotOrZero.epoch, genesis_validators_root)
|
|
|
|
(extIp, extTcpPort, extUdpPort) = try: setupAddress(
|
|
config.nat, config.listenAddress, config.tcpPort, config.udpPort, clientId)
|
|
except CatchableError as exc: raise exc
|
|
except Exception as exc: raiseAssert exc.msg
|
|
|
|
hostAddress = tcpEndPoint(config.listenAddress, config.tcpPort)
|
|
announcedAddresses = if extIp.isNone() or extTcpPort.isNone(): @[]
|
|
else: @[tcpEndPoint(extIp.get(), extTcpPort.get())]
|
|
|
|
debug "Initializing networking", hostAddress,
|
|
network_public_key = netKeys.pubkey,
|
|
announcedAddresses
|
|
|
|
# TODO nim-libp2p still doesn't have support for announcing addresses
|
|
# that are different from the host address (this is relevant when we
|
|
# are running behind a NAT).
|
|
var switch = newBeaconSwitch(config, netKeys.seckey, hostAddress, rng)
|
|
|
|
let phase0Prefix = "/eth2/" & $forkDigests.phase0
|
|
|
|
func msgIdProvider(m: messages.Message): Result[seq[byte], ValidationResult] =
|
|
template topic: untyped =
|
|
if m.topicIds.len > 0: m.topicIds[0] else: ""
|
|
|
|
try:
|
|
# This doesn't have to be a tight bound, just enough to avoid denial of
|
|
# service attacks.
|
|
let decoded = snappy.decode(m.data, GOSSIP_MAX_SIZE_BELLATRIX)
|
|
ok(gossipId(decoded, phase0Prefix, topic))
|
|
except CatchableError:
|
|
err(ValidationResult.Reject)
|
|
|
|
let
|
|
params = GossipSubParams(
|
|
explicit: true,
|
|
pruneBackoff: chronos.minutes(1),
|
|
unsubscribeBackoff: chronos.seconds(10),
|
|
floodPublish: true,
|
|
gossipFactor: 0.05,
|
|
d: 8,
|
|
dLow: 6,
|
|
dHigh: 12,
|
|
dScore: 6,
|
|
dOut: 6 div 2, # less than dlow and no more than dlow/2
|
|
dLazy: 6,
|
|
heartbeatInterval: chronos.milliseconds(700),
|
|
historyLength: 6,
|
|
historyGossip: 3,
|
|
fanoutTTL: chronos.seconds(60),
|
|
seenTTL: chronos.seconds(385),
|
|
gossipThreshold: -4000,
|
|
publishThreshold: -8000,
|
|
graylistThreshold: -16000, # also disconnect threshold
|
|
opportunisticGraftThreshold: 0,
|
|
decayInterval: chronos.seconds(12),
|
|
decayToZero: 0.01,
|
|
retainScore: chronos.seconds(385),
|
|
appSpecificWeight: 0.0,
|
|
ipColocationFactorWeight: -53.75,
|
|
ipColocationFactorThreshold: 3.0,
|
|
behaviourPenaltyWeight: -15.9,
|
|
behaviourPenaltyDecay: 0.986,
|
|
disconnectBadPeers: true,
|
|
directPeers:
|
|
block:
|
|
var res = initTable[PeerId, seq[MultiAddress]]()
|
|
if config.directPeers.len > 0:
|
|
for s in config.directPeers:
|
|
let
|
|
maddress = MultiAddress.init(s).tryGet()
|
|
mpeerId = maddress[multiCodec("p2p")].tryGet()
|
|
peerId = PeerId.init(mpeerId.protoAddress().tryGet()).tryGet()
|
|
res.mgetOrPut(peerId, @[]).add(maddress)
|
|
info "Adding priviledged direct peer", peerId, address = maddress
|
|
res
|
|
)
|
|
pubsub = GossipSub.init(
|
|
switch = switch,
|
|
msgIdProvider = msgIdProvider,
|
|
# We process messages in the validator, so we don't need data callbacks
|
|
triggerSelf = false,
|
|
sign = false,
|
|
verifySignature = false,
|
|
anonymize = true,
|
|
maxMessageSize = GOSSIP_MAX_SIZE_BELLATRIX,
|
|
parameters = params)
|
|
|
|
switch.mount(pubsub)
|
|
|
|
let node = Eth2Node.new(
|
|
config, cfg, enrForkId, discoveryForkId, forkDigests, getBeaconTime, switch, pubsub, extIp,
|
|
extTcpPort, extUdpPort, netKeys.seckey.asEthKey,
|
|
discovery = config.discv5Enabled, rng = rng)
|
|
|
|
node.pubsub.subscriptionValidator =
|
|
proc(topic: string): bool {.gcsafe, raises: [Defect].} =
|
|
topic in node.validTopics
|
|
|
|
node
|
|
|
|
func announcedENR*(node: Eth2Node): enr.Record =
|
|
doAssert node.discovery != nil, "The Eth2Node must be initialized"
|
|
node.discovery.localNode.record
|
|
|
|
func shortForm*(id: NetKeyPair): string =
|
|
$PeerId.init(id.pubkey)
|
|
|
|
proc subscribe*(
|
|
node: Eth2Node, topic: string, topicParams: TopicParams,
|
|
enableTopicMetrics: bool = false) =
|
|
if enableTopicMetrics:
|
|
node.pubsub.knownTopics.incl(topic)
|
|
|
|
node.pubsub.topicParams[topic] = topicParams
|
|
|
|
# Passing in `nil` because we do all message processing in the validator
|
|
node.pubsub.subscribe(topic, nil)
|
|
|
|
proc newValidationResultFuture(v: ValidationResult): Future[ValidationResult] =
|
|
let res = newFuture[ValidationResult]("eth2_network.execValidator")
|
|
res.complete(v)
|
|
res
|
|
|
|
proc addValidator*[MsgType](node: Eth2Node,
|
|
topic: string,
|
|
msgValidator: proc(msg: MsgType):
|
|
ValidationResult {.gcsafe, raises: [Defect].} ) =
|
|
# Message validators run when subscriptions are enabled - they validate the
|
|
# data and return an indication of whether the message should be broadcast
|
|
# or not - validation is `async` but implemented without the macro because
|
|
# this is a performance hotspot.
|
|
proc execValidator(topic: string, message: GossipMsg):
|
|
Future[ValidationResult] {.raises: [Defect].} =
|
|
inc nbc_gossip_messages_received
|
|
trace "Validating incoming gossip message", len = message.data.len, topic
|
|
|
|
var decompressed = snappy.decode(message.data, gossipMaxSize(MsgType))
|
|
let res = if decompressed.len > 0:
|
|
try:
|
|
let decoded = SSZ.decode(decompressed, MsgType)
|
|
decompressed = newSeq[byte](0) # release memory before validating
|
|
msgValidator(decoded) # doesn't raise!
|
|
except SszError as e:
|
|
inc nbc_gossip_failed_ssz
|
|
debug "Error decoding gossip",
|
|
topic, len = message.data.len, decompressed = decompressed.len,
|
|
error = e.msg
|
|
ValidationResult.Reject
|
|
else: # snappy returns empty seq on failed decompression
|
|
inc nbc_gossip_failed_snappy
|
|
debug "Error decompressing gossip", topic, len = message.data.len
|
|
ValidationResult.Reject
|
|
|
|
newValidationResultFuture(res)
|
|
|
|
node.validTopics.incl topic # Only allow subscription to validated topics
|
|
node.pubsub.addValidator(topic, execValidator)
|
|
|
|
proc addAsyncValidator*[MsgType](node: Eth2Node,
|
|
topic: string,
|
|
msgValidator: proc(msg: MsgType):
|
|
Future[ValidationResult] {.gcsafe, raises: [Defect].} ) =
|
|
proc execValidator(topic: string, message: GossipMsg):
|
|
Future[ValidationResult] {.raises: [Defect].} =
|
|
inc nbc_gossip_messages_received
|
|
trace "Validating incoming gossip message", len = message.data.len, topic
|
|
|
|
var decompressed = snappy.decode(message.data, gossipMaxSize(MsgType))
|
|
if decompressed.len > 0:
|
|
try:
|
|
let decoded = SSZ.decode(decompressed, MsgType)
|
|
decompressed = newSeq[byte](0) # release memory before validating
|
|
msgValidator(decoded) # doesn't raise!
|
|
except SszError as e:
|
|
inc nbc_gossip_failed_ssz
|
|
debug "Error decoding gossip",
|
|
topic, len = message.data.len, decompressed = decompressed.len,
|
|
error = e.msg
|
|
newValidationResultFuture(ValidationResult.Reject)
|
|
else: # snappy returns empty seq on failed decompression
|
|
inc nbc_gossip_failed_snappy
|
|
debug "Error decompressing gossip", topic, len = message.data.len
|
|
newValidationResultFuture(ValidationResult.Reject)
|
|
|
|
node.validTopics.incl topic # Only allow subscription to validated topics
|
|
|
|
node.pubsub.addValidator(topic, execValidator)
|
|
|
|
proc unsubscribe*(node: Eth2Node, topic: string) =
|
|
node.pubsub.unsubscribeAll(topic)
|
|
|
|
proc gossipEncode(msg: auto): seq[byte] =
|
|
let uncompressed = SSZ.encode(msg)
|
|
# This function only for messages we create. A message this large amounts to
|
|
# an internal logic error.
|
|
doAssert uncompressed.len <= GOSSIP_MAX_SIZE_BELLATRIX
|
|
|
|
snappy.encode(uncompressed)
|
|
|
|
proc broadcast(node: Eth2Node, topic: string, msg: seq[byte]):
|
|
Future[Result[void, cstring]] {.async.} =
|
|
let peers = await node.pubsub.publish(topic, msg)
|
|
|
|
# TODO remove workaround for sync committee BN/VC log spam
|
|
if peers > 0 or find(topic, "sync_committee_") != -1:
|
|
inc nbc_gossip_messages_sent
|
|
return ok()
|
|
else:
|
|
# Increments libp2p_gossipsub_failed_publish metric
|
|
return err("No peers on libp2p topic")
|
|
|
|
proc broadcast(node: Eth2Node, topic: string, msg: auto):
|
|
Future[Result[void, cstring]] =
|
|
# Avoid {.async.} copies of message while broadcasting
|
|
broadcast(node, topic, gossipEncode(msg))
|
|
|
|
proc subscribeAttestationSubnets*(
|
|
node: Eth2Node, subnets: AttnetBits, forkDigest: ForkDigest) =
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#attestations-and-aggregation
|
|
# Nimbus won't score attestation subnets for now, we just rely on block and
|
|
# aggregate which are more stable and reliable
|
|
|
|
for subnet_id, enabled in subnets:
|
|
if enabled:
|
|
node.subscribe(getAttestationTopic(
|
|
forkDigest, SubnetId(subnet_id)), TopicParams.init()) # don't score attestation subnets for now
|
|
|
|
proc unsubscribeAttestationSubnets*(
|
|
node: Eth2Node, subnets: AttnetBits, forkDigest: ForkDigest) =
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#attestations-and-aggregation
|
|
# Nimbus won't score attestation subnets for now; we just rely on block and
|
|
# aggregate which are more stable and reliable
|
|
|
|
for subnet_id, enabled in subnets:
|
|
if enabled:
|
|
node.unsubscribe(getAttestationTopic(forkDigest, SubnetId(subnet_id)))
|
|
|
|
proc updateStabilitySubnetMetadata*(node: Eth2Node, attnets: AttnetBits) =
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.1/specs/phase0/p2p-interface.md#metadata
|
|
if node.metadata.attnets == attnets:
|
|
return
|
|
|
|
node.metadata.seq_number += 1
|
|
node.metadata.attnets = attnets
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#phase-0-attestation-subnet-stability
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#attestation-subnet-bitfield
|
|
let res = node.discovery.updateRecord({
|
|
enrAttestationSubnetsField: SSZ.encode(node.metadata.attnets)
|
|
})
|
|
if res.isErr():
|
|
# This should not occur in this scenario as the private key would always
|
|
# be the correct one and the ENR will not increase in size.
|
|
warn "Failed to update the ENR attnets field", error = res.error
|
|
else:
|
|
debug "Stability subnets changed; updated ENR attnets", attnets
|
|
|
|
proc updateSyncnetsMetadata*(node: Eth2Node, syncnets: SyncnetBits) =
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.2/specs/altair/validator.md#sync-committee-subnet-stability
|
|
if node.metadata.syncnets == syncnets:
|
|
return
|
|
|
|
node.metadata.seq_number += 1
|
|
node.metadata.syncnets = syncnets
|
|
|
|
let res = node.discovery.updateRecord({
|
|
enrSyncSubnetsField: SSZ.encode(node.metadata.syncnets)
|
|
})
|
|
if res.isErr():
|
|
# This should not occur in this scenario as the private key would always
|
|
# be the correct one and the ENR will not increase in size.
|
|
warn "Failed to update the ENR syncnets field", error = res.error
|
|
else:
|
|
debug "Sync committees changed; updated ENR syncnets", syncnets
|
|
|
|
proc updateForkId(node: Eth2Node, value: ENRForkID) =
|
|
node.forkId = value
|
|
let res = node.discovery.updateRecord({enrForkIdField: SSZ.encode value})
|
|
if res.isErr():
|
|
# This should not occur in this scenario as the private key would always
|
|
# be the correct one and the ENR will not increase in size.
|
|
warn "Failed to update the ENR fork id", value, error = res.error
|
|
else:
|
|
debug "ENR fork id changed", value
|
|
|
|
proc updateForkId*(node: Eth2Node, epoch: Epoch, genesis_validators_root: Eth2Digest) =
|
|
node.updateForkId(getENRForkID(node.cfg, epoch, genesis_validators_root))
|
|
node.discoveryForkId = getDiscoveryForkID(node.cfg, epoch, genesis_validators_root)
|
|
|
|
func forkDigestAtEpoch(node: Eth2Node, epoch: Epoch): ForkDigest =
|
|
node.forkDigests[].atEpoch(epoch, node.cfg)
|
|
|
|
proc getWallEpoch(node: Eth2Node): Epoch =
|
|
node.getBeaconTime().slotOrZero.epoch
|
|
|
|
proc broadcastAttestation*(
|
|
node: Eth2Node, subnet_id: SubnetId, attestation: Attestation):
|
|
Future[SendResult] =
|
|
# Regardless of the contents of the attestation,
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/p2p-interface.md#transitioning-the-gossip
|
|
# implies that pre-fork, messages using post-fork digests might be
|
|
# ignored, whilst post-fork, there is effectively a seen_ttl-based
|
|
# timer unsubscription point that means no new pre-fork-forkdigest
|
|
# should be sent.
|
|
let
|
|
forkPrefix = node.forkDigestAtEpoch(node.getWallEpoch)
|
|
topic = getAttestationTopic(forkPrefix, subnet_id)
|
|
node.broadcast(topic, attestation)
|
|
|
|
proc broadcastVoluntaryExit*(
|
|
node: Eth2Node, exit: SignedVoluntaryExit): Future[SendResult] =
|
|
let topic = getVoluntaryExitsTopic(node.forkDigestAtEpoch(node.getWallEpoch))
|
|
node.broadcast(topic, exit)
|
|
|
|
proc broadcastAttesterSlashing*(
|
|
node: Eth2Node, slashing: AttesterSlashing): Future[SendResult] =
|
|
let topic = getAttesterSlashingsTopic(
|
|
node.forkDigestAtEpoch(node.getWallEpoch))
|
|
node.broadcast(topic, slashing)
|
|
|
|
proc broadcastProposerSlashing*(
|
|
node: Eth2Node, slashing: ProposerSlashing): Future[SendResult] =
|
|
let topic = getProposerSlashingsTopic(
|
|
node.forkDigestAtEpoch(node.getWallEpoch))
|
|
node.broadcast(topic, slashing)
|
|
|
|
proc broadcastBlsToExecutionChange*(
|
|
node: Eth2Node, bls_to_execution_change: SignedBLSToExecutionChange):
|
|
Future[SendResult] =
|
|
let topic = getBlsToExecutionChangeTopic(
|
|
node.forkDigestAtEpoch(node.getWallEpoch))
|
|
node.broadcast(topic, bls_to_execution_change)
|
|
|
|
proc broadcastAggregateAndProof*(
|
|
node: Eth2Node, proof: SignedAggregateAndProof): Future[SendResult] =
|
|
let topic = getAggregateAndProofsTopic(
|
|
node.forkDigestAtEpoch(node.getWallEpoch))
|
|
node.broadcast(topic, proof)
|
|
|
|
proc broadcastBeaconBlock*(
|
|
node: Eth2Node, blck: phase0.SignedBeaconBlock): Future[SendResult] =
|
|
let topic = getBeaconBlocksTopic(node.forkDigests.phase0)
|
|
node.broadcast(topic, blck)
|
|
|
|
proc broadcastBeaconBlock*(
|
|
node: Eth2Node, blck: altair.SignedBeaconBlock): Future[SendResult] =
|
|
let topic = getBeaconBlocksTopic(node.forkDigests.altair)
|
|
node.broadcast(topic, blck)
|
|
|
|
proc broadcastBeaconBlock*(
|
|
node: Eth2Node, blck: bellatrix.SignedBeaconBlock): Future[SendResult] =
|
|
let topic = getBeaconBlocksTopic(node.forkDigests.bellatrix)
|
|
node.broadcast(topic, blck)
|
|
|
|
proc broadcastBeaconBlock*(
|
|
node: Eth2Node, blck: capella.SignedBeaconBlock): Future[SendResult] =
|
|
let topic = getBeaconBlocksTopic(node.forkDigests.capella)
|
|
node.broadcast(topic, blck)
|
|
|
|
proc broadcastBeaconBlock*(
|
|
node: Eth2Node, blck: deneb.SignedBeaconBlock): Future[SendResult] =
|
|
let topic = getBeaconBlocksTopic(node.forkDigests.deneb)
|
|
node.broadcast(topic, blck)
|
|
|
|
proc broadcastSyncCommitteeMessage*(
|
|
node: Eth2Node, msg: SyncCommitteeMessage,
|
|
subcommitteeIdx: SyncSubcommitteeIndex): Future[SendResult] =
|
|
let topic = getSyncCommitteeTopic(
|
|
node.forkDigestAtEpoch(node.getWallEpoch), subcommitteeIdx)
|
|
node.broadcast(topic, msg)
|
|
|
|
proc broadcastSignedContributionAndProof*(
|
|
node: Eth2Node, msg: SignedContributionAndProof): Future[SendResult] =
|
|
let topic = getSyncCommitteeContributionAndProofTopic(
|
|
node.forkDigestAtEpoch(node.getWallEpoch))
|
|
node.broadcast(topic, msg)
|
|
|
|
proc broadcastLightClientFinalityUpdate*(
|
|
node: Eth2Node, msg: ForkyLightClientFinalityUpdate):
|
|
Future[SendResult] =
|
|
let topic = getLightClientFinalityUpdateTopic(
|
|
node.forkDigestAtEpoch(msg.contextEpoch))
|
|
node.broadcast(topic, msg)
|
|
|
|
proc broadcastLightClientOptimisticUpdate*(
|
|
node: Eth2Node, msg: ForkyLightClientOptimisticUpdate):
|
|
Future[SendResult] =
|
|
let topic = getLightClientOptimisticUpdateTopic(
|
|
node.forkDigestAtEpoch(msg.contextEpoch))
|
|
node.broadcast(topic, msg)
|