273 lines
9.1 KiB
Nim
273 lines
9.1 KiB
Nim
import
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options, tables,
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chronos, json_serialization, strutils, chronicles, eth/net/nat,
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spec/digest, version, conf
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const
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clientId = "Nimbus beacon node v" & fullVersionStr()
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export
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version
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let
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globalListeningAddr = parseIpAddress("0.0.0.0")
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proc setupNat(conf: BeaconNodeConf): tuple[ip: IpAddress,
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tcpPort: Port,
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udpPort: Port] =
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# defaults
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result.ip = globalListeningAddr
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result.tcpPort = Port(conf.tcpPort)
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result.udpPort = Port(conf.udpPort)
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var nat: NatStrategy
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case conf.nat.toLowerAscii:
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of "any":
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nat = NatAny
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of "none":
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nat = NatNone
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of "upnp":
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nat = NatUpnp
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of "pmp":
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nat = NatPmp
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else:
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if conf.nat.startsWith("extip:") and isIpAddress(conf.nat[6..^1]):
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# any required port redirection is assumed to be done by hand
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result.ip = parseIpAddress(conf.nat[6..^1])
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nat = NatNone
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else:
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error "not a valid NAT mechanism, nor a valid IP address", value = conf.nat
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quit(QuitFailure)
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if nat != NatNone:
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let extIP = getExternalIP(nat)
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if extIP.isSome:
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result.ip = extIP.get()
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let extPorts = redirectPorts(tcpPort = result.tcpPort,
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udpPort = result.udpPort,
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description = clientId)
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if extPorts.isSome:
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(result.tcpPort, result.udpPort) = extPorts.get()
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when networkBackend == rlpxBackend:
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import
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os,
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eth/[rlp, p2p, keys], gossipsub_protocol,
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eth/p2p/peer_pool # for log on connected peers
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export
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p2p, rlp, gossipsub_protocol
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const
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netBackendName* = "rlpx"
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IrrelevantNetwork* = UselessPeer
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type
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Eth2Node* = EthereumNode
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Eth2NodeIdentity* = KeyPair
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BootstrapAddr* = ENode
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proc getPersistentNetIdentity*(conf: BeaconNodeConf): Eth2NodeIdentity =
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let privateKeyFile = conf.dataDir / "network.privkey"
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var privKey: PrivateKey
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if not fileExists(privateKeyFile):
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privKey = newPrivateKey()
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createDir conf.dataDir.string
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writeFile(privateKeyFile, $privKey)
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else:
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privKey = initPrivateKey(readFile(privateKeyFile).string)
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KeyPair(seckey: privKey, pubkey: privKey.getPublicKey())
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proc getPersistenBootstrapAddr*(conf: BeaconNodeConf,
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ip: IpAddress, port: Port): BootstrapAddr =
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let
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identity = getPersistentNetIdentity(conf)
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address = Address(ip: ip, tcpPort: port, udpPort: port)
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initENode(identity.pubKey, address)
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proc isSameNode*(bootstrapNode: BootstrapAddr, id: Eth2NodeIdentity): bool =
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bootstrapNode.pubKey == id.pubKey
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proc shortForm*(id: Eth2NodeIdentity): string =
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($id.pubKey)[0..5]
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proc writeValue*(writer: var JsonWriter, value: BootstrapAddr) {.inline.} =
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writer.writeValue $value
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proc readValue*(reader: var JsonReader, value: var BootstrapAddr) {.inline.} =
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value = initENode reader.readValue(string)
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proc createEth2Node*(conf: BeaconNodeConf,
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bootstrapNodes: seq[BootstrapAddr]): Future[EthereumNode] {.async.} =
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let
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keys = getPersistentNetIdentity(conf)
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(ip, tcpPort, udpPort) = setupNat(conf)
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address = Address(ip: ip,
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tcpPort: tcpPort,
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udpPort: udpPort)
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# TODO there are more networking options to add here: local bind ip, ipv6
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# etc.
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return newEthereumNode(keys, address, 0,
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nil, clientId)
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proc saveConnectionAddressFile*(node: Eth2Node, filename: string) =
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writeFile(filename, $node.listeningAddress)
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proc init*(T: type BootstrapAddr, str: string): T =
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initENode(str)
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func peersCount*(node: Eth2Node): int =
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node.peerPool.len
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else:
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import
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os, random, stew/io,
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libp2p/crypto/crypto, libp2p/daemon/daemonapi, eth/async_utils,
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ssz, libp2p_backend
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export
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libp2p_backend
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const
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netBackendName* = "libp2p"
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networkKeyFilename = "privkey.protobuf"
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type
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BootstrapAddr* = PeerInfo
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Eth2NodeIdentity* = PeerInfo
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proc init*(T: type BootstrapAddr, str: string): T =
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Json.decode(str, PeerInfo)
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proc ensureNetworkIdFile(conf: BeaconNodeConf): string =
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result = conf.dataDir / networkKeyFilename
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if not fileExists(result):
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createDir conf.dataDir.string
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let pk = PrivateKey.random(Secp256k1)
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writeFile(result, pk.getBytes)
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proc getPersistentNetIdentity*(conf: BeaconNodeConf): Eth2NodeIdentity =
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# Using waitFor here is reasonable, because this proc is needed only
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# prior to connecting to the network. The RLPx alternative reads from
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# file and it's much easier to use if it's not async.
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# TODO: revisit in the future when we have our own Lib2P2 implementation.
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let daemon = waitFor newDaemonApi(id = conf.ensureNetworkIdFile)
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result = waitFor daemon.identity()
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waitFor daemon.close()
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template tcpEndPoint(address, port): auto =
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MultiAddress.init(address, Protocol.IPPROTO_TCP, port)
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var mainDaemon: DaemonAPI
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proc allMultiAddresses(nodes: seq[BootstrapAddr]): seq[string] =
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for node in nodes:
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for a in node.addresses:
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result.add $a & "/ipfs/" & node.peer.pretty()
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proc createEth2Node*(conf: BeaconNodeConf,
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bootstrapNodes: seq[BootstrapAddr]): Future[Eth2Node] {.async.} =
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var
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(extIp, extTcpPort, extUdpPort) = setupNat(conf)
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hostAddress = tcpEndPoint(globalListeningAddr, Port conf.tcpPort)
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announcedAddresses = if extIp != globalListeningAddr: @[]
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else: @[tcpEndPoint(extIp, extTcpPort)]
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keyFile = conf.ensureNetworkIdFile
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info "Starting the LibP2P daemon", hostAddress, announcedAddresses,
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keyFile, bootstrapNodes
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var daemonFut = if bootstrapNodes.len == 0:
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newDaemonApi({PSNoSign, DHTFull, PSGossipSub},
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id = keyFile,
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hostAddresses = @[hostAddress],
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announcedAddresses = announcedAddresses)
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else:
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newDaemonApi({PSNoSign, DHTFull, PSGossipSub, WaitBootstrap},
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id = keyFile,
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hostAddresses = @[hostAddress],
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announcedAddresses = announcedAddresses,
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bootstrapNodes = allMultiAddresses(bootstrapNodes),
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peersRequired = 1)
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info "Deamon started"
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mainDaemon = await daemonFut
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proc closeDaemon() {.noconv.} =
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info "Shutting down the LibP2P daemon"
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waitFor mainDaemon.close()
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addQuitProc(closeDaemon)
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return await Eth2Node.init(mainDaemon)
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proc getPersistenBootstrapAddr*(conf: BeaconNodeConf,
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ip: IpAddress, port: Port): BootstrapAddr =
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result = getPersistentNetIdentity(conf)
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result.addresses = @[tcpEndPoint(ip, port)]
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proc isSameNode*(bootstrapNode: BootstrapAddr, id: Eth2NodeIdentity): bool =
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bootstrapNode.peer == id.peer
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proc shortForm*(id: Eth2NodeIdentity): string =
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# TODO: Make this shorter
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$id
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proc connectToNetwork*(node: Eth2Node, bootstrapNodes: seq[PeerInfo]) {.async.} =
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# TODO: perhaps we should do these in parallel
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var connected = false
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for bootstrapNode in bootstrapNodes:
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try:
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await node.daemon.connect(bootstrapNode.peer, bootstrapNode.addresses)
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var peer = node.getPeer(bootstrapNode.peer)
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peer.wasDialed = true
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await initializeConnection(peer)
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connected = true
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except CatchableError as err:
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error "Failed to connect to bootstrap node",
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node = bootstrapNode, err = err.msg
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if bootstrapNodes.len > 0 and connected == false:
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fatal "Failed to connect to any bootstrap node. Quitting."
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quit 1
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proc saveConnectionAddressFile*(node: Eth2Node, filename: string) =
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let id = waitFor node.daemon.identity()
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Json.saveFile(filename, id, pretty = false)
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proc loadConnectionAddressFile*(filename: string): PeerInfo =
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Json.loadFile(filename, PeerInfo)
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func peersCount*(node: Eth2Node): int =
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node.peers.len
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proc makeMessageHandler[MsgType](msgHandler: proc(msg: MsgType)): P2PPubSubCallback =
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result = proc(api: DaemonAPI,
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ticket: PubsubTicket,
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msg: PubSubMessage): Future[bool] {.async.} =
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trace "Incoming gossip bytes",
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peer = msg.peer, len = msg.data.len, tops = msg.topics
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msgHandler SSZ.decode(msg.data, MsgType)
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return true
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proc subscribe*[MsgType](node: Eth2Node,
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topic: string,
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msgHandler: proc(msg: MsgType)) {.async.} =
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discard await node.daemon.pubsubSubscribe(topic, makeMessageHandler(msgHandler))
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proc broadcast*(node: Eth2Node, topic: string, msg: auto) =
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traceAsyncErrors node.daemon.pubsubPublish(topic, SSZ.encode(msg))
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# TODO:
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# At the moment, this is just a compatiblity shim for the existing RLPx functionality.
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# The filtering is not implemented properly yet.
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iterator randomPeers*(node: Eth2Node, maxPeers: int, Protocol: type): Peer =
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var peers = newSeq[Peer]()
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for _, peer in pairs(node.peers): peers.add peer
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shuffle peers
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if peers.len > maxPeers: peers.setLen(maxPeers)
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for p in peers: yield p
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