mirror of https://github.com/waku-org/nwaku.git
52 lines
1.4 KiB
Nim
52 lines
1.4 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
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chronicles,
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chronos,
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stew/byteutils,
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libp2p/protocols/pubsub/gossipsub,
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libp2p/protocols/pubsub/rpc/messages,
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libp2p/protocols/pubsub/errors,
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nimcrypto/sha2,
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secp256k1
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import
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./protocol,
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../waku_core
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# Application level message hash
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proc msgHash*(pubSubTopic: string, msg: WakuMessage): array[32, byte] =
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var ctx: sha256
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ctx.init()
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defer: ctx.clear()
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ctx.update(pubsubTopic.toBytes())
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ctx.update(msg.payload)
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ctx.update(msg.contentTopic.toBytes())
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# TODO: Other fields?
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return ctx.finish()
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proc addSignedTopicValidator*(w: WakuRelay, topic: PubsubTopic, publicTopicKey: SkPublicKey) =
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debug "adding validator to signed topic", topic=topic, publicTopicKey=publicTopicKey
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proc validator(topic: string, message: messages.Message): Future[errors.ValidationResult] {.async.} =
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let msg = WakuMessage.decode(message.data)
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if msg.isOk():
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let msgHash = SkMessage(topic.msgHash(msg.get))
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let recoveredSignature = SkSignature.fromRaw(msg.get.meta)
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if recoveredSignature.isErr():
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# TODO: add metrics for accept/reject
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return errors.ValidationResult.Reject
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if recoveredSignature.get.verify(msgHash, publicTopicKey):
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return errors.ValidationResult.Accept
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else:
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return errors.ValidationResult.Reject
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return errors.ValidationResult.Reject
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w.addValidator(topic, validator)
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