[Agent: cross-repo-impact] Sync protos from arkd PR #988: sweep_tx event + sweptVtxos field

[arkanaai]

Context

arkd PR #988 (merged 2026-03-23) changed the gRPC API. dotnet-sdk vendors its own proto copies under NArk.Core/Transport/GrpcClient/Protos/ — both files need updating.

API changes in arkd

service.proto — new sweep_tx field in the GetTransactionsStreamResponse oneof:

message GetTransactionsStreamResponse {
  oneof data {
    TxNotification commitment_tx = 1;
    TxNotification ark_tx = 2;
    Heartbeat heartbeat = 3;
    TxNotification sweep_tx = 4;  // NEW
  }
}

types.proto — new swept_vtxos repeated field in TxNotification:

message TxNotification {
  // ...
  repeated Outpoint swept_vtxos = 6;  // NEW
}

Files to update in dotnet-sdk

• NArk.Core/Transport/GrpcClient/Protos/ark/v1/service.proto — add sweep_tx = 4 to oneof
• NArk.Core/Transport/GrpcClient/Protos/ark/v1/types.proto — add swept_vtxos = 6 to TxNotification
• Any generated gRPC C# stubs (if re-generated from proto)
• Update stream handler if dotnet-sdk processes GetTransactionsStreamResponse events

Trigger

[from: cross-repo-impact agent] Detected from arkd PR #988 merged at 2026-03-23T09:16:57Z