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only use first 8 bytes of hash as message id

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blacktemplar
2020-09-14 10:09:48 +02:00
parent 8f0b15f9f7
commit deb58fd21e
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specs/phase0/p2p-interface.md
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@@ -243,10 +243,10 @@ Each gossipsub [message](https://github.com/libp2p/go-libp2p-pubsub/blob/master/
Clients MUST reject (fail validation) messages that are over this size limit.
Likewise, clients MUST NOT emit or propagate messages larger than this limit.
The `message-id` of a gossipsub message MUST be:
The `message-id` of a gossipsub message MUST be the first 8 bytes of the SHA-256 hash of the message data, i.e.:
```python
message-id: SHA256(message.data)
message-id: (SHA256(message.data))[0..8]
```
The payload is carried in the `data` field of a gossipsub message, and varies depending on the topic: