import std/[tables, sequtils], stew/byteutils, stew/shims/net, chronicles, chronos, confutils, libp2p/crypto/crypto, eth/keys, eth/p2p/discoveryv5/enr import ../../../waku/common/logging, ../../../waku/v2/node/peer_manager, ../../../waku/v2/waku_core, ../../../waku/v2/waku_node, ../../../waku/v2/waku_enr, ../../../waku/v2/waku_discv5 # An accesible bootstrap node. See wakuv2.prod fleets.status.im const bootstrapNode = "enr:-Nm4QOdTOKZJKTUUZ4O_W932CXIET-M9NamewDnL78P5u9DOGnZl" & "K0JFZ4k0inkfe6iY-0JAaJVovZXc575VV3njeiABgmlkgnY0gmlwhAjS" & "3ueKbXVsdGlhZGRyc7g6ADg2MW5vZGUtMDEuYWMtY24taG9uZ2tvbmct" & "Yy53YWt1djIucHJvZC5zdGF0dXNpbS5uZXQGH0DeA4lzZWNwMjU2azGh" & "Ao0C-VvfgHiXrxZi3umDiooXMGY9FvYj5_d1Q4EeS7eyg3RjcIJ2X4N1" & "ZHCCIyiFd2FrdTIP" # careful if running pub and sub in the same machine const wakuPort = 50000 const discv5Port = 8000 proc setupAndSubscribe(rng: ref HmacDrbgContext) {.async.} = # use notice to filter all waku messaging setupLogLevel(logging.LogLevel.NOTICE) notice "starting subscriber", wakuPort=wakuPort, discv5Port=discv5Port let nodeKey = crypto.PrivateKey.random(Secp256k1, rng[])[] ip = ValidIpAddress.init("0.0.0.0") flags = CapabilitiesBitfield.init(lightpush = false, filter = false, store = false, relay = true) var builder = WakuNodeBuilder.init() builder.withNodeKey(nodeKey) builder.withNetworkConfigurationDetails(ip, Port(wakuPort)).tryGet() let node = builder.build().tryGet() var bootstrapNodeEnr: enr.Record discard bootstrapNodeEnr.fromURI(bootstrapNode) # assumes behind a firewall, so not care about being discoverable node.wakuDiscv5 = WakuDiscoveryV5.new( extIp= none(ValidIpAddress), extTcpPort = none(Port), extUdpPort = none(Port), bindIP = ip, discv5UdpPort = Port(discv5Port), bootstrapEnrs = @[bootstrapNodeEnr], privateKey = keys.PrivateKey(nodeKey.skkey), flags = flags, rng = node.rng) await node.start() await node.mountRelay() node.peerManager.start() if not await node.startDiscv5(): error "failed to start discv5" quit(1) # wait for a minimum of peers to be connected, otherwise messages wont be gossiped while true: let numConnectedPeers = node.peerManager.peerStore[ConnectionBook].book.values().countIt(it == Connected) if numConnectedPeers >= 6: notice "subscriber is ready", connectedPeers=numConnectedPeers, required=6 break notice "waiting to be ready", connectedPeers=numConnectedPeers, required=6 await sleepAsync(5000) # Make sure it matches the publisher. Use default value # see spec: https://rfc.vac.dev/spec/23/ let pubSubTopic = PubsubTopic("/waku/2/default-waku/proto") # any content topic can be chosen. make sure it matches the publisher let contentTopic = ContentTopic("/examples/1/pubsub-example/proto") proc handler(pubsubTopic: PubsubTopic, data: seq[byte]) {.async, gcsafe.} = let message = WakuMessage.decode(data).value let payloadStr = string.fromBytes(message.payload) if message.contentTopic == contentTopic: notice "message received", payload=payloadStr, pubsubTopic=pubsubTopic, contentTopic=message.contentTopic, timestamp=message.timestamp node.subscribe(pubSubTopic, handler) when isMainModule: let rng = crypto.newRng() asyncSpawn setupAndSubscribe(rng) runForever()