mirror of https://github.com/waku-org/nwaku.git
41 lines
1.2 KiB
Nim
41 lines
1.2 KiB
Nim
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 chronos, chronicles, std/[options, sequtils], stew/results
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import ../waku_discv5, ../waku_relay, ../waku_core, ./message_cache
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### Discovery
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type DiscoveryHandler* =
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proc(): Future[Result[Option[RemotePeerInfo], string]] {.async, closure.}
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proc defaultDiscoveryHandler*(
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discv5: WakuDiscoveryV5, cap: Capabilities
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): DiscoveryHandler =
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proc(): Future[Result[Option[RemotePeerInfo], string]] {.async, closure.} =
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#Discv5 is already filtering peers by shards no need to pass a predicate.
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let findPeers = discv5.findRandomPeers()
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if not await findPeers.withTimeout(60.seconds):
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return err("discovery process timed out!")
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var peers = findPeers.read()
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peers.keepItIf(it.supportsCapability(cap))
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if peers.len == 0:
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return ok(none(RemotePeerInfo))
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let remotePeerInfo = peers[0].toRemotePeerInfo().valueOr:
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return err($error)
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return ok(some(remotePeerInfo))
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### Message Cache
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proc messageCacheHandler*(cache: MessageCache): WakuRelayHandler =
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return proc(pubsubTopic: string, msg: WakuMessage): Future[void] {.async, closure.} =
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cache.addMessage(pubsubTopic, msg)
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