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[CL-129] partial payloads: protobuf and ssz definitions #252

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[CL-129] partial payloads: protobuf and ssz definitions #252

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ef8261e
gossip: add partial-message protobuf fields and borrowed views
Sep 11, 2026
348f78f
ssz: add Fulu and Gloas partial-column views and encoders
Sep 11, 2026
70389e1
gossip: build fork-qualified partial frames from retained cell ranges
Sep 11, 2026
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19 changes: 19 additions & 0 deletions crates/gossip/protobuf/gossipsub.proto
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Original file line number Diff line number Diff line change
Expand Up @@ -9,9 +9,14 @@ message RPC {
message SubOpts {
optional bool subscribe = 1; // subscribe or unsubscribe
optional string topic_id = 2;
// Partial Messages extension: requesting partials implies
// supports_sending_partial, even when that flag is absent or false.
optional bool requests_partial = 3;
optional bool supports_sending_partial = 4;
}

optional ControlMessage control = 3;
optional PartialMessagesExtension partial = 10;
}

message Message {
Expand All @@ -29,6 +34,20 @@ message ControlMessage {
repeated ControlGraft graft = 3;
repeated ControlPrune prune = 4;
repeated ControlIDontWant idontwant = 5;
optional ControlExtensions extensions = 6;
}

message ControlExtensions {
optional bool partial_messages = 10;
}

// One (topic_id, group_id) pair per RPC frame; partial_message and
// parts_metadata are raw SSZ, not Snappy.
message PartialMessagesExtension {
optional bytes topic_id = 1;
optional bytes group_id = 2;
optional bytes partial_message = 3;
optional bytes parts_metadata = 4;
}

message ControlIHave {
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