mirror of https://github.com/waku-org/nwaku.git
38 lines
1.2 KiB
Nim
38 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
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stew/results,
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nimcrypto/sha2,
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libp2p/protocols/pubsub,
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libp2p/protocols/pubsub/rpc/messages
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## Message ID provider
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type MessageIdProvider* = pubsub.MsgIdProvider
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## Default message ID provider
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# Performs a sha256 digest on the Waku Relay message payload. As Protocol Buffers v3
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# deterministic serialization is not canonical between the different languages and
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# implementations.
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#
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# See: https://gist.github.com/kchristidis/39c8b310fd9da43d515c4394c3cd9510
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#
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# This lack of deterministic serializaion could lead to a situation where two
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# messages with the same attributes and serialized by different implementations
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# have a different message ID (hash). This can impact the performance of the
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# Waku Relay (Gossipsub) protocol's message cache and the gossiping process, and
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# as a consequence the network.
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proc defaultMessageIdProvider*(message: messages.Message): Result[MessageID, ValidationResult] =
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let hash = sha256.digest(message.data)
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ok(@(hash.data))
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## Waku message Unique ID provider
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# TODO: Add here the MUID provider once `meta` field RFC PR is merged
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