2022-11-04 12:40:24 +00:00
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import
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std/[tables, sequtils],
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stew/byteutils,
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stew/shims/net,
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chronicles,
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chronicles/topics_registry,
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chronos,
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confutils,
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libp2p/crypto/crypto,
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eth/keys,
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eth/p2p/discoveryv5/enr
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import
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../../../waku/v2/node/discv5/waku_discv5,
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../../../waku/v2/node/peer_manager/peer_manager,
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../../../waku/v2/node/waku_node,
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../../../waku/v2/protocol/waku_message,
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../../../waku/v2/utils/wakuenr
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# An accesible bootstrap node. See wakuv2.prod fleets.status.im
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const bootstrapNodes = @["enr:-Nm4QOdTOKZJKTUUZ4O_W932CXIET-M9NamewDnL78P5u9DOGnZlK0JFZ4k0inkfe6iY-0JAaJVovZXc575VV3njeiABgmlkgnY0gmlwhAjS3ueKbXVsdGlhZGRyc7g6ADg2MW5vZGUtMDEuYWMtY24taG9uZ2tvbmctYy53YWt1djIucHJvZC5zdGF0dXNpbS5uZXQGH0DeA4lzZWNwMjU2azGhAo0C-VvfgHiXrxZi3umDiooXMGY9FvYj5_d1Q4EeS7eyg3RjcIJ2X4N1ZHCCIyiFd2FrdTIP"]
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# careful if running pub and sub in the same machine
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const wakuPort = 50000
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const discv5Port = 8000
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proc setupAndSubscribe() {.async.} =
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# use notice to filter all waku messaging
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setLogLevel(LogLevel.NOTICE)
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notice "starting subscriber", wakuPort=wakuPort, discv5Port=discv5Port
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let
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nodeKey = crypto.PrivateKey.random(Secp256k1, crypto.newRng()[])[]
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ip = ValidIpAddress.init("0.0.0.0")
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node = WakuNode.new(nodeKey, ip, Port(wakuPort))
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flags = initWakuFlags(lightpush = false, filter = false, store = false, relay = true)
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# assumes behind a firewall, so not care about being discoverable
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node.wakuDiscv5 = WakuDiscoveryV5.new(
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extIp= none(ValidIpAddress),
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extTcpPort = none(Port),
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extUdpPort = none(Port),
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bindIP = ip,
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discv5UdpPort = Port(discv5Port),
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bootstrapNodes = bootstrapNodes,
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privateKey = keys.PrivateKey(nodeKey.skkey),
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flags = flags,
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enrFields = [],
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rng = node.rng)
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await node.start()
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await node.mountRelay()
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if not await node.startDiscv5():
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error "failed to start discv5"
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quit(1)
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# wait for a minimum of peers to be connected, otherwise messages wont be gossiped
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while true:
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let numConnectedPeers = node.peerManager.peerStore.connectionBook.book.values().countIt(it == Connected)
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if numConnectedPeers >= 6:
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notice "subscriber is ready", connectedPeers=numConnectedPeers, required=6
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break
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notice "waiting to be ready", connectedPeers=numConnectedPeers, required=6
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await sleepAsync(5000)
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# Make sure it matches the publisher. Use default value
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# see spec: https://rfc.vac.dev/spec/23/
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let pubSubTopic = PubsubTopic("/waku/2/default-waku/proto")
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# any content topic can be chosen. make sure it matches the publisher
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let contentTopic = ContentTopic("/examples/1/pubsub-example/proto")
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proc handler(pubsubTopic: PubsubTopic, data: seq[byte]) {.async, gcsafe.} =
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2022-11-07 15:24:16 +00:00
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let message = WakuMessage.decode(data).value
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2022-11-04 12:40:24 +00:00
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let payloadStr = string.fromBytes(message.payload)
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if message.contentTopic == contentTopic:
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notice "message received", payload=payloadStr,
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pubsubTopic=pubsubTopic,
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contentTopic=message.contentTopic,
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timestamp=message.timestamp
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node.subscribe(pubSubTopic, handler)
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asyncSpawn setupAndSubscribe()
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runForever()
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