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identify: add a sequence number to the Identify protobuf #502

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identify: add a sequence number to the Identify protobuf #502

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37070e5
identify: add a sequence number to the Identify protobuf
marten-seemann Jan 2, 2023
d9de900
identify: recommend using unix timestamp as sequence number
marten-seemann Feb 16, 2023
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14 changes: 12 additions & 2 deletions identify/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -5,18 +5,19 @@

| Lifecycle Stage | Maturity Level | Status | Latest Revision |
|-----------------|----------------|--------|-----------------|
| 3A | Recommendation | Active | r1, 2021-08-09 |
| 3A | Recommendation | Active | r2, 2023-01-03 |

Authors: [@vyzo]

Interest Group: [@yusefnapora], [@tomaka], [@richardschneider], [@Stebalien], [@bigs]
Interest Group: [@yusefnapora], [@tomaka], [@richardschneider], [@Stebalien], [@bigs], [@marten-seemann]

[@vyzo]: https://github.com/vyzo
[@yusefnapora]: https://github.com/yusefnapora
[@tomaka]: https://github.com/tomaka
[@richardschneider]: https://github.com/richardschneider
[@Stebalien]: https://github.com/Stebalien
[@bigs]: https://github.com/bigs
[@marten-seemann]: https://github.com/marten-seemann

See the [lifecycle document][lifecycle-spec] for context about the maturity level
and spec status.
Expand All @@ -31,6 +32,7 @@ and spec status.
- [`identify`](#identify)
- [`identify/push`](#identifypush)
- [The Identify Message](#the-identify-message)
- [sequence](#sequence)
- [protocolVersion](#protocolversion)
- [agentVersion](#agentversion)
- [publicKey](#publickey)
Expand Down Expand Up @@ -74,6 +76,7 @@ whose values have changed.

```protobuf
message Identify {
optional uint64 sequence = 7;
optional string protocolVersion = 5;
optional string agentVersion = 6;
optional bytes publicKey = 1;
Expand All @@ -83,6 +86,13 @@ message Identify {
}
```

### sequence

A sequence number for this identify message used to deal with reordered Identify
messages. Senders SHOULD increment the sequence number for every Identify message
they send. After processing an Identify with a certain sequence number, receivers
MUST ignore all Identify messages with smaller sequence numbers.
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### protocolVersion

The protocol version identifies the family of protocols used by the peer. The
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