mirror of https://github.com/waku-org/nwaku.git
98 lines
3.0 KiB
Nim
98 lines
3.0 KiB
Nim
{.push raises: [].}
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import std/options, results, chronicles, chronos, metrics, bearssl/rand
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import
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../node/peer_manager,
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../node/delivery_monitor/publish_observer,
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../utils/requests,
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../waku_core,
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./common,
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./protocol_metrics,
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./rpc,
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./rpc_codec
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logScope:
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topics = "waku lightpush client"
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type WakuLightPushClient* = ref object
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peerManager*: PeerManager
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rng*: ref rand.HmacDrbgContext
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publishObservers: seq[PublishObserver]
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proc new*(
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T: type WakuLightPushClient, peerManager: PeerManager, rng: ref rand.HmacDrbgContext
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): T =
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WakuLightPushClient(peerManager: peerManager, rng: rng)
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proc addPublishObserver*(wl: WakuLightPushClient, obs: PublishObserver) =
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wl.publishObservers.add(obs)
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proc sendPushRequest(
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wl: WakuLightPushClient, req: PushRequest, peer: PeerId | RemotePeerInfo
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): Future[WakuLightPushResult[void]] {.async, gcsafe.} =
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let connOpt = await wl.peerManager.dialPeer(peer, WakuLightPushCodec)
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if connOpt.isNone():
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waku_lightpush_errors.inc(labelValues = [dialFailure])
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return err(dialFailure)
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let connection = connOpt.get()
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let rpc = PushRPC(requestId: generateRequestId(wl.rng), request: some(req))
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await connection.writeLP(rpc.encode().buffer)
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var buffer: seq[byte]
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try:
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buffer = await connection.readLp(DefaultMaxRpcSize.int)
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except LPStreamRemoteClosedError:
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return err("Exception reading: " & getCurrentExceptionMsg())
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let decodeRespRes = PushRPC.decode(buffer)
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if decodeRespRes.isErr():
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error "failed to decode response"
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waku_lightpush_errors.inc(labelValues = [decodeRpcFailure])
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return err(decodeRpcFailure)
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let pushResponseRes = decodeRespRes.get()
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if pushResponseRes.response.isNone():
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waku_lightpush_errors.inc(labelValues = [emptyResponseBodyFailure])
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return err(emptyResponseBodyFailure)
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let response = pushResponseRes.response.get()
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if not response.isSuccess:
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if response.info.isSome():
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return err(response.info.get())
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else:
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return err("unknown failure")
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return ok()
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proc publish*(
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wl: WakuLightPushClient,
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pubSubTopic: PubsubTopic,
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message: WakuMessage,
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peer: PeerId | RemotePeerInfo,
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): Future[WakuLightPushResult[void]] {.async, gcsafe.} =
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let pushRequest = PushRequest(pubSubTopic: pubSubTopic, message: message)
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?await wl.sendPushRequest(pushRequest, peer)
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for obs in wl.publishObservers:
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obs.onMessagePublished(pubSubTopic, message)
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return ok()
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proc publishToAny*(
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wl: WakuLightPushClient, pubSubTopic: PubsubTopic, message: WakuMessage
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): Future[WakuLightPushResult[void]] {.async, gcsafe.} =
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## This proc is similar to the publish one but in this case
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## we don't specify a particular peer and instead we get it from peer manager
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let peer = wl.peerManager.selectPeer(WakuLightPushCodec).valueOr:
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return err("could not retrieve a peer supporting WakuLightPushCodec")
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let pushRequest = PushRequest(pubSubTopic: pubSubTopic, message: message)
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?await wl.sendPushRequest(pushRequest, peer)
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for obs in wl.publishObservers:
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obs.onMessagePublished(pubSubTopic, message)
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return ok()
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