0.3.15-pre.015

crates/ksp-onchain-transport-lib/tests/release_completeness.rs

@@ -1,5 +1,5 @@
 // file: crates/ksp-onchain-transport-lib/tests/release_completeness.rs
-// version: 47
+// version: 48
 
 //! Release-level completeness canaries for staged HTTP and WebSocket Transport coverage.
 
@@ -1412,3 +1412,25 @@ fn release_v0_3_15_pre_002_websocket_capabilities_are_endpoint_declared_typed_an
     assert!(!settings_source.contains("provider().as_str() == \"helius\""));
     assert!(!settings_source.contains("provider().as_str() == \"publicnode\""));
 }
+
+#[test]
+fn release_v0_3_15_pre_015_yellowstone_update_delivery_backpressures_without_local_overflow() {
+    let stream_source = include_str!("../src/grpc_stream.rs");
+    let stream_tests = include_str!("../unit_tests/grpc_stream.rs");
+    let actor_start = stream_source.find("async fn run_subscribe_actor(").expect("Subscribe actor must remain present");
+    let actor_tail = &stream_source[actor_start..];
+    let actor_end = actor_tail
+        .find(
+            "
+enum ReconnectOutcome",
+        )
+        .expect("Subscribe actor boundary must remain present");
+    let actor = &actor_tail[..actor_end];
+    assert!(actor.contains("result = update_tx.send(std::result::Result::Ok(update)) => result"));
+    assert!(actor.contains("shutdown_changed = shutdown_rx.changed()"));
+    assert!(actor.contains("biased;"));
+    assert!(!actor.contains("Yellowstone subscribe update queue overflowed"));
+    assert!(stream_source.contains("ERROR_CODE_GRPC_BACKPRESSURE_OVERFLOW"));
+    assert!(!stream_source.contains("unbounded_channel"));
+    assert!(stream_tests.contains("yellowstone_slow_receiver_applies_bounded_backpressure_without_terminal_overflow"));
+}