mirror of https://github.com/waku-org/nwaku.git
583 lines
21 KiB
Nim
583 lines
21 KiB
Nim
## chat2 is an example of usage of Waku v2. For suggested usage options, please
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## see dingpu tutorial in docs folder.
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when not(compileOption("threads")):
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{.fatal: "Please, compile this program with the --threads:on option!".}
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when (NimMajor, NimMinor) < (1, 4):
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{.push raises: [Defect].}
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else:
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{.push raises: [].}
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import std/[strformat, strutils, times, json, options, random]
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import confutils, chronicles, chronos, stew/shims/net as stewNet,
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eth/keys, bearssl, stew/[byteutils, results],
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nimcrypto/pbkdf2,
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metrics,
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metrics/chronos_httpserver
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import libp2p/[switch, # manage transports, a single entry point for dialing and listening
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crypto/crypto, # cryptographic functions
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stream/connection, # create and close stream read / write connections
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multiaddress, # encode different addressing schemes. For example, /ip4/7.7.7.7/tcp/6543 means it is using IPv4 protocol and TCP
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peerinfo, # manage the information of a peer, such as peer ID and public / private key
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peerid, # Implement how peers interact
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protobuf/minprotobuf, # message serialisation/deserialisation from and to protobufs
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protocols/secure/secio, # define the protocol of secure input / output, allows encrypted communication that uses public keys to validate signed messages instead of a certificate authority like in TLS
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nameresolving/dnsresolver]# define DNS resolution
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import
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../../waku/waku_core,
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../../waku/waku_lightpush,
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../../waku/waku_lightpush/rpc,
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../../waku/waku_filter,
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../../waku/waku_enr,
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../../waku/waku_store,
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../../waku/waku_dnsdisc,
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../../waku/waku_node,
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../../waku/node/waku_metrics,
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../../waku/node/peer_manager,
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../../waku/common/utils/nat,
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./config_chat2
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import
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libp2p/protocols/pubsub/rpc/messages,
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libp2p/protocols/pubsub/pubsub
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import
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../../waku/waku_rln_relay
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const Help = """
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Commands: /[?|help|connect|nick|exit]
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help: Prints this help
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connect: dials a remote peer
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nick: change nickname for current chat session
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exit: exits chat session
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"""
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# XXX Connected is a bit annoying, because incoming connections don't trigger state change
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# Could poll connection pool or something here, I suppose
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# TODO Ensure connected turns true on incoming connections, or get rid of it
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type Chat = ref object
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node: WakuNode # waku node for publishing, subscribing, etc
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transp: StreamTransport # transport streams between read & write file descriptor
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subscribed: bool # indicates if a node is subscribed or not to a topic
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connected: bool # if the node is connected to another peer
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started: bool # if the node has started
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nick: string # nickname for this chat session
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prompt: bool # chat prompt is showing
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contentTopic: string # default content topic for chat messages
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type
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PrivateKey* = crypto.PrivateKey
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Topic* = waku_core.PubsubTopic
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#####################
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## chat2 protobufs ##
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#####################
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type
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SelectResult*[T] = Result[T, string]
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Chat2Message* = object
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timestamp*: int64
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nick*: string
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payload*: seq[byte]
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proc init*(T: type Chat2Message, buffer: seq[byte]): ProtoResult[T] =
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var msg = Chat2Message()
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let pb = initProtoBuffer(buffer)
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var timestamp: uint64
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discard ? pb.getField(1, timestamp)
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msg.timestamp = int64(timestamp)
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discard ? pb.getField(2, msg.nick)
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discard ? pb.getField(3, msg.payload)
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ok(msg)
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proc encode*(message: Chat2Message): ProtoBuffer =
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var serialised = initProtoBuffer()
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serialised.write(1, uint64(message.timestamp))
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serialised.write(2, message.nick)
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serialised.write(3, message.payload)
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return serialised
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proc toString*(message: Chat2Message): string =
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# Get message date and timestamp in local time
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let time = message.timestamp.fromUnix().local().format("'<'MMM' 'dd,' 'HH:mm'>'")
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return time & " " & message.nick & ": " & string.fromBytes(message.payload)
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#####################
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proc connectToNodes(c: Chat, nodes: seq[string]) {.async.} =
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echo "Connecting to nodes"
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await c.node.connectToNodes(nodes)
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c.connected = true
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proc showChatPrompt(c: Chat) =
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if not c.prompt:
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try:
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stdout.write(">> ")
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stdout.flushFile()
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c.prompt = true
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except IOError:
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discard
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proc getChatLine(c: Chat, msg:WakuMessage): Result[string, string]=
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# No payload encoding/encryption from Waku
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let
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pb = Chat2Message.init(msg.payload)
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chatLine = if pb.isOk: pb[].toString()
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else: string.fromBytes(msg.payload)
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return ok(chatline)
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proc printReceivedMessage(c: Chat, msg: WakuMessage) =
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let
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pb = Chat2Message.init(msg.payload)
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chatLine = if pb.isOk: pb[].toString()
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else: string.fromBytes(msg.payload)
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try:
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echo &"{chatLine}"
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except ValueError:
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# Formatting fail. Print chat line in any case.
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echo chatLine
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c.prompt = false
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showChatPrompt(c)
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trace "Printing message", topic=DefaultPubsubTopic, chatLine,
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contentTopic = msg.contentTopic
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proc readNick(transp: StreamTransport): Future[string] {.async.} =
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# Chat prompt
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stdout.write("Choose a nickname >> ")
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stdout.flushFile()
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return await transp.readLine()
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proc startMetricsServer(serverIp: IpAddress, serverPort: Port): Result[MetricsHttpServerRef, string] =
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info "Starting metrics HTTP server", serverIp= $serverIp, serverPort= $serverPort
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let metricsServerRes = MetricsHttpServerRef.new($serverIp, serverPort)
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if metricsServerRes.isErr():
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return err("metrics HTTP server start failed: " & $metricsServerRes.error)
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let server = metricsServerRes.value
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try:
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waitFor server.start()
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except CatchableError:
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return err("metrics HTTP server start failed: " & getCurrentExceptionMsg())
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info "Metrics HTTP server started", serverIp= $serverIp, serverPort= $serverPort
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ok(metricsServerRes.value)
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proc publish(c: Chat, line: string) =
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# First create a Chat2Message protobuf with this line of text
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let time = getTime().toUnix()
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let chat2pb = Chat2Message(timestamp: time,
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nick: c.nick,
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payload: line.toBytes()).encode()
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## @TODO: error handling on failure
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proc handler(response: PushResponse) {.gcsafe, closure.} =
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trace "lightpush response received", response=response
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var message = WakuMessage(payload: chat2pb.buffer,
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contentTopic: c.contentTopic, version: 0, timestamp: getNanosecondTime(time))
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if not isNil(c.node.wakuRlnRelay):
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# for future version when we support more than one rln protected content topic,
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# we should check the message content topic as well
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let success = c.node.wakuRlnRelay.appendRLNProof(message, float64(time))
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if not success:
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debug "could not append rate limit proof to the message", success=success
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else:
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debug "rate limit proof is appended to the message", success=success
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let decodeRes = RateLimitProof.init(message.proof)
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if decodeRes.isErr():
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error "could not decode the RLN proof"
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let proof = decodeRes.get()
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# TODO move it to log after dogfooding
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let msgEpoch = fromEpoch(proof.epoch)
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if fromEpoch(c.node.wakuRlnRelay.lastEpoch) == msgEpoch:
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echo "--rln epoch: ", msgEpoch, " ⚠️ message rate violation! you are spamming the network!"
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else:
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echo "--rln epoch: ", msgEpoch
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# update the last epoch
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c.node.wakuRlnRelay.lastEpoch = proof.epoch
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if not c.node.wakuLightPush.isNil():
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# Attempt lightpush
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asyncSpawn c.node.lightpushPublish(some(DefaultPubsubTopic), message)
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else:
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asyncSpawn c.node.publish(some(DefaultPubsubTopic), message)
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# TODO This should read or be subscribe handler subscribe
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proc readAndPrint(c: Chat) {.async.} =
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while true:
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# while p.connected:
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# # TODO: echo &"{p.id} -> "
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#
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# echo cast[string](await p.conn.readLp(1024))
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#echo "readAndPrint subscribe NYI"
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await sleepAsync(100.millis)
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# TODO Implement
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proc writeAndPrint(c: Chat) {.async.} =
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while true:
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# Connect state not updated on incoming WakuRelay connections
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# if not c.connected:
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# echo "type an address or wait for a connection:"
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# echo "type /[help|?] for help"
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# Chat prompt
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showChatPrompt(c)
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let line = await c.transp.readLine()
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if line.startsWith("/help") or line.startsWith("/?") or not c.started:
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echo Help
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continue
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# if line.startsWith("/disconnect"):
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# echo "Ending current session"
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# if p.connected and p.conn.closed.not:
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# await p.conn.close()
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# p.connected = false
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elif line.startsWith("/connect"):
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# TODO Should be able to connect to multiple peers for Waku chat
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if c.connected:
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echo "already connected to at least one peer"
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continue
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echo "enter address of remote peer"
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let address = await c.transp.readLine()
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if address.len > 0:
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await c.connectToNodes(@[address])
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elif line.startsWith("/nick"):
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# Set a new nickname
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c.nick = await readNick(c.transp)
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echo "You are now known as " & c.nick
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elif line.startsWith("/exit"):
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if not c.node.wakuFilterLegacy.isNil():
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echo "unsubscribing from content filters..."
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let peerOpt = c.node.peerManager.selectPeer(WakuLegacyFilterCodec)
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if peerOpt.isSome():
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await c.node.legacyFilterUnsubscribe(pubsubTopic=some(DefaultPubsubTopic), contentTopics=c.contentTopic, peer=peerOpt.get())
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echo "quitting..."
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try:
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await c.node.stop()
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except:
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echo "exception happened when stopping: " & getCurrentExceptionMsg()
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quit(QuitSuccess)
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else:
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# XXX connected state problematic
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if c.started:
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c.publish(line)
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# TODO Connect to peer logic?
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else:
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try:
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if line.startsWith("/") and "p2p" in line:
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await c.connectToNodes(@[line])
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except:
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echo &"unable to dial remote peer {line}"
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echo getCurrentExceptionMsg()
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proc readWriteLoop(c: Chat) {.async.} =
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asyncSpawn c.writeAndPrint() # execute the async function but does not block
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asyncSpawn c.readAndPrint()
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proc readInput(wfd: AsyncFD) {.thread, raises: [Defect, CatchableError].} =
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## This procedure performs reading from `stdin` and sends data over
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## pipe to main thread.
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let transp = fromPipe(wfd)
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while true:
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let line = stdin.readLine()
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discard waitFor transp.write(line & "\r\n")
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{.pop.} # @TODO confutils.nim(775, 17) Error: can raise an unlisted exception: ref IOError
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proc processInput(rfd: AsyncFD, rng: ref HmacDrbgContext) {.async.} =
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let
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transp = fromPipe(rfd)
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conf = Chat2Conf.load()
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nodekey = if conf.nodekey.isSome(): conf.nodekey.get()
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else: PrivateKey.random(Secp256k1, rng[]).tryGet()
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# set log level
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if conf.logLevel != LogLevel.NONE:
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setLogLevel(conf.logLevel)
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let natRes = setupNat(conf.nat, clientId,
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Port(uint16(conf.tcpPort) + conf.portsShift),
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Port(uint16(conf.udpPort) + conf.portsShift))
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if natRes.isErr():
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raise newException(ValueError, "setupNat error " & natRes.error)
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let (extIp, extTcpPort, extUdpPort) = natRes.get()
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var enrBuilder = EnrBuilder.init(nodeKey)
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let recordRes = enrBuilder.build()
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let record =
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if recordRes.isErr():
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error "failed to create enr record", error=recordRes.error
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quit(QuitFailure)
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else: recordRes.get()
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let node = block:
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var builder = WakuNodeBuilder.init()
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builder.withNodeKey(nodeKey)
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builder.withRecord(record)
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builder.withNetworkConfigurationDetails(conf.listenAddress, Port(uint16(conf.tcpPort) + conf.portsShift),
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extIp, extTcpPort,
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wsBindPort = Port(uint16(conf.websocketPort) + conf.portsShift),
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wsEnabled = conf.websocketSupport,
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wssEnabled = conf.websocketSecureSupport).tryGet()
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builder.build().tryGet()
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await node.start()
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if conf.rlnRelayCredPath == "":
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raise newException(ConfigurationError, "rln-relay-cred-path MUST be passed")
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if conf.relay:
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await node.mountRelay(conf.topics.split(" "))
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await node.mountLibp2pPing()
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let nick = await readNick(transp)
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echo "Welcome, " & nick & "!"
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var chat = Chat(node: node,
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transp: transp,
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subscribed: true,
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connected: false,
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started: true,
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nick: nick,
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prompt: false,
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contentTopic: conf.contentTopic)
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if conf.staticnodes.len > 0:
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echo "Connecting to static peers..."
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await connectToNodes(chat, conf.staticnodes)
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var dnsDiscoveryUrl = none(string)
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if conf.fleet != Fleet.none:
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# Use DNS discovery to connect to selected fleet
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echo "Connecting to " & $conf.fleet & " fleet using DNS discovery..."
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if conf.fleet == Fleet.test:
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dnsDiscoveryUrl = some("enrtree://AO47IDOLBKH72HIZZOXQP6NMRESAN7CHYWIBNXDXWRJRZWLODKII6@test.wakuv2.nodes.status.im")
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else:
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# Connect to prod by default
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dnsDiscoveryUrl = some("enrtree://ANEDLO25QVUGJOUTQFRYKWX6P4Z4GKVESBMHML7DZ6YK4LGS5FC5O@prod.wakuv2.nodes.status.im")
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elif conf.dnsDiscovery and conf.dnsDiscoveryUrl != "":
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# No pre-selected fleet. Discover nodes via DNS using user config
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debug "Discovering nodes using Waku DNS discovery", url=conf.dnsDiscoveryUrl
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dnsDiscoveryUrl = some(conf.dnsDiscoveryUrl)
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var discoveredNodes: seq[RemotePeerInfo]
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if dnsDiscoveryUrl.isSome:
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var nameServers: seq[TransportAddress]
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for ip in conf.dnsDiscoveryNameServers:
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nameServers.add(initTAddress(ip, Port(53))) # Assume all servers use port 53
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let dnsResolver = DnsResolver.new(nameServers)
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proc resolver(domain: string): Future[string] {.async, gcsafe.} =
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trace "resolving", domain=domain
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let resolved = await dnsResolver.resolveTxt(domain)
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return resolved[0] # Use only first answer
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var wakuDnsDiscovery = WakuDnsDiscovery.init(dnsDiscoveryUrl.get(),
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resolver)
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if wakuDnsDiscovery.isOk:
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let discoveredPeers = wakuDnsDiscovery.get().findPeers()
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if discoveredPeers.isOk:
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info "Connecting to discovered peers"
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discoveredNodes = discoveredPeers.get()
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echo "Discovered and connecting to " & $discoveredNodes
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waitFor chat.node.connectToNodes(discoveredNodes)
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else:
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warn "Failed to init Waku DNS discovery"
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let peerInfo = node.switch.peerInfo
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let listenStr = $peerInfo.addrs[0] & "/p2p/" & $peerInfo.peerId
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echo &"Listening on\n {listenStr}"
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if (conf.storenode != "") or (conf.store == true):
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await node.mountStore()
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var storenode: Option[RemotePeerInfo]
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if conf.storenode != "":
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let peerInfo = parsePeerInfo(conf.storenode)
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if peerInfo.isOk():
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storenode = some(peerInfo.value)
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else:
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error "Incorrect conf.storenode", error = peerInfo.error
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elif discoveredNodes.len > 0:
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echo "Store enabled, but no store nodes configured. Choosing one at random from discovered peers"
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storenode = some(discoveredNodes[rand(0..len(discoveredNodes) - 1)])
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if storenode.isSome():
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# We have a viable storenode. Let's query it for historical messages.
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echo "Connecting to storenode: " & $(storenode.get())
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node.mountStoreClient()
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node.peerManager.addServicePeer(storenode.get(), WakuStoreCodec)
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proc storeHandler(response: HistoryResponse) {.gcsafe.} =
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for msg in response.messages:
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let
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pb = Chat2Message.init(msg.payload)
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chatLine = if pb.isOk: pb[].toString()
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else: string.fromBytes(msg.payload)
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echo &"{chatLine}"
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info "Hit store handler"
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let queryRes = await node.query(HistoryQuery(contentTopics: @[chat.contentTopic]))
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if queryRes.isOk():
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storeHandler(queryRes.value)
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# NOTE Must be mounted after relay
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if conf.lightpushnode != "":
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let peerInfo = parsePeerInfo(conf.lightpushnode)
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if peerInfo.isOk():
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await mountLightPush(node)
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node.mountLightPushClient()
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node.peerManager.addServicePeer(peerInfo.value, WakuLightpushCodec)
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else:
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error "LightPush not mounted. Couldn't parse conf.lightpushnode",
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error = peerInfo.error
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if conf.filternode != "":
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let peerInfo = parsePeerInfo(conf.filternode)
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if peerInfo.isOk():
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await node.mountFilter()
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await node.mountFilterClient()
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node.peerManager.addServicePeer(peerInfo.value, WakuLegacyFilterCodec)
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proc filterHandler(pubsubTopic: PubsubTopic, msg: WakuMessage) {.async, gcsafe, closure.} =
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trace "Hit filter handler", contentTopic=msg.contentTopic
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chat.printReceivedMessage(msg)
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await node.legacyFilterSubscribe(pubsubTopic=some(DefaultPubsubTopic),
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contentTopics=chat.contentTopic,
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filterHandler,
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peerInfo.value)
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# TODO: Here to support FilterV2 relevant subscription, but still
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# Legacy Filter is concurrent to V2 untill legacy filter will be removed
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else:
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error "Filter not mounted. Couldn't parse conf.filternode",
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error = peerInfo.error
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# Subscribe to a topic, if relay is mounted
|
|
if conf.relay:
|
|
proc handler(topic: PubsubTopic, msg: WakuMessage): Future[void] {.async, gcsafe.} =
|
|
trace "Hit subscribe handler", topic
|
|
|
|
if msg.contentTopic == chat.contentTopic:
|
|
chat.printReceivedMessage(msg)
|
|
|
|
node.subscribe((kind: PubsubSub, topic: DefaultPubsubTopic), some(handler))
|
|
|
|
if conf.rlnRelay:
|
|
info "WakuRLNRelay is enabled"
|
|
|
|
proc spamHandler(wakuMessage: WakuMessage) {.gcsafe, closure.} =
|
|
debug "spam handler is called"
|
|
let chatLineResult = chat.getChatLine(wakuMessage)
|
|
if chatLineResult.isOk():
|
|
echo "A spam message is found and discarded : ", chatLineResult.value
|
|
else:
|
|
echo "A spam message is found and discarded"
|
|
chat.prompt = false
|
|
showChatPrompt(chat)
|
|
|
|
echo "rln-relay preparation is in progress..."
|
|
|
|
let rlnConf = WakuRlnConfig(
|
|
rlnRelayDynamic: conf.rlnRelayDynamic,
|
|
rlnRelayCredIndex: conf.rlnRelayCredIndex,
|
|
rlnRelayEthContractAddress: conf.rlnRelayEthContractAddress,
|
|
rlnRelayEthClientAddress: conf.rlnRelayEthClientAddress,
|
|
rlnRelayCredPath: conf.rlnRelayCredPath,
|
|
rlnRelayCredPassword: conf.rlnRelayCredPassword
|
|
)
|
|
|
|
waitFor node.mountRlnRelay(rlnConf,
|
|
spamHandler=some(spamHandler))
|
|
|
|
let membershipIndex = node.wakuRlnRelay.groupManager.membershipIndex.get()
|
|
let identityCredential = node.wakuRlnRelay.groupManager.idCredentials.get()
|
|
echo "your membership index is: ", membershipIndex
|
|
echo "your rln identity commitment key is: ", identityCredential.idCommitment.inHex()
|
|
else:
|
|
info "WakuRLNRelay is disabled"
|
|
echo "WakuRLNRelay is disabled, please enable it by passing in the --rln-relay flag"
|
|
if conf.metricsLogging:
|
|
startMetricsLog()
|
|
|
|
if conf.metricsServer:
|
|
let metricsServer = startMetricsServer(
|
|
conf.metricsServerAddress,
|
|
Port(conf.metricsServerPort + conf.portsShift)
|
|
)
|
|
|
|
|
|
await chat.readWriteLoop()
|
|
|
|
if conf.keepAlive:
|
|
node.startKeepalive()
|
|
|
|
runForever()
|
|
|
|
proc main(rng: ref HmacDrbgContext) {.async.} =
|
|
let (rfd, wfd) = createAsyncPipe()
|
|
if rfd == asyncInvalidPipe or wfd == asyncInvalidPipe:
|
|
raise newException(ValueError, "Could not initialize pipe!")
|
|
|
|
var thread: Thread[AsyncFD]
|
|
thread.createThread(readInput, wfd)
|
|
try:
|
|
await processInput(rfd, rng)
|
|
# Handle only ConfigurationError for now
|
|
# TODO: Throw other errors from the mounting procedure
|
|
except ConfigurationError as e:
|
|
raise e
|
|
|
|
|
|
when isMainModule: # isMainModule = true when the module is compiled as the main file
|
|
let rng = crypto.newRng()
|
|
try:
|
|
waitFor(main(rng))
|
|
except CatchableError as e:
|
|
raise e
|
|
|
|
## Dump of things that can be improved:
|
|
##
|
|
## - Incoming dialed peer does not change connected state (not relying on it for now)
|
|
## - Unclear if staticnode argument works (can enter manually)
|
|
## - Don't trigger self / double publish own messages
|
|
## - Integrate store protocol (fetch messages in beginning)
|
|
## - Integrate filter protocol (default/option to be light node, connect to filter node)
|
|
## - Test/default to cluster node connection (diff protocol version)
|
|
## - Redirect logs to separate file
|
|
## - Expose basic publish/subscribe etc commands with /syntax
|
|
## - Show part of peerid to know who sent message
|
|
## - Deal with protobuf messages (e.g. other chat protocol, or encrypted)
|