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[GossipSub 1.1] Limit the size of PRUNE Peer Exchange list #576

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[GossipSub 1.1] Limit the size of PRUNE Peer Exchange list #576

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5 changes: 4 additions & 1 deletion pubsub/gossipsub/gossipsub-v1.1.md
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Expand Up @@ -126,7 +126,9 @@ In this case, the pruned peer will have to rely on the ambient peer discovery se

#### Protobuf

The `ControlPrune` message is extended with a `peers` field as follows.
The `ControlPrune` message is extended with a `peers` field as follows. The `peers` list must not contain
more than `MaxExchangePeers`


```protobuf
syntax = "proto2";
Expand Down Expand Up @@ -545,6 +547,7 @@ The following parameters apply globally:
| Parameter | Type | Description | Reasonable Default |
|----------------------|------------------|------------------------------------------------------------------------|--------------------|
| `PruneBackoff` | Duration | Time after pruning a mesh peer before we consider grafting them again. | `1 minute` |
| `MaxExchangePeers` | Integer | Maximum number of entries in `ControlPrune.peers` list | 16 |
| `UnsubscribeBackoff` | Duration | Backoff to use when unsuscribing from a topic. Should not resubscribe to this topic before it expired. | `10 seconds` |
| `FloodPublish` | Boolean | Whether to enable flood publishing | `true` |
| `GossipFactor` | Float [0.0, 1.0] | % of peers to send gossip to, if we have more than `D_lazy` available | `0.25` |
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