mirror of https://github.com/waku-org/nwaku.git
47 lines
1.5 KiB
Nim
47 lines
1.5 KiB
Nim
## Here's a basic example of how you would start a Waku node, subscribe to
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## topics, and publish to them.
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import
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std/[os,options],
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confutils, chronicles, chronos,
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stew/shims/net as stewNet,
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libp2p/crypto/[crypto,secp],
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eth/keys,
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json_rpc/[rpcclient, rpcserver],
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../../waku/v2/node/[config, wakunode2],
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../../waku/common/utils/nat,
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../../waku/v2/protocol/waku_message
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# Node operations happens asynchronously
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proc runBackground() {.async.} =
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let
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conf = WakuNodeConf.load()
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(extIp, extTcpPort, extUdpPort) = setupNat(conf.nat, clientId,
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Port(uint16(conf.tcpPort) + conf.portsShift),
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# This is actually a UDP port but we're only supplying this value
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# To satisfy the API.
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Port(uint16(conf.tcpPort) + conf.portsShift))
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node = WakuNode.new(conf.nodeKey, conf.listenAddress,
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Port(uint16(conf.tcpPort) + conf.portsShift), extIp, extTcpPort)
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await node.start()
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node.mountRelay()
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# Subscribe to a topic
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let topic = cast[Topic]("foobar")
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proc handler(topic: Topic, data: seq[byte]) {.async, gcsafe.} =
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let message = WakuMessage.init(data).value
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let payload = cast[string](message.payload)
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info "Hit subscribe handler", topic=topic, payload=payload, contentTopic=message.contentTopic
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node.subscribe(topic, handler)
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# Publish to a topic
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let payload = cast[seq[byte]]("hello world")
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let message = WakuMessage(payload: payload, contentTopic: ContentTopic("/waku/2/default-content/proto"))
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await node.publish(topic, message)
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# TODO Await with try/except here
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discard runBackground()
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runForever()
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