v0.2.9-pre.009
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deltas/0.2.9/pre.009.md
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<!-- file: deltas/0.2.9/pre.009.md -->
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<!-- version: 1 -->
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# Delta `0.2.9-pre.009` — bidi standard + backpressure + half-close + shutdown
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## Base
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```text
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0.2.9-pre.008-fix.001
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gate opérateur final : fmt/audit/check/Clippy/workspace PASS sans warning
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Transport : 370 unit + 47 public API + 41 release-completeness + 4 doctests
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```
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## Changements
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- ouvre `/geyser.Geyser/Subscribe` avec le channel Tonic N1 existant ;
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- ajoute `SolanaYellowstoneGrpcSubscribeSession` et son état public sûr ;
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- branche directement une `mpsc` request bornée dans le stream client Tonic ;
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- ajoute `try_update()` avec validation, borne protobuf et erreurs Full/Closed structurées ;
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- promeut les conversions request et décodeurs `pre.004–008` de test-only vers runtime privé ;
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- expose `YellowstoneSubscribeUpdate` couvrant les neuf variantes standard ;
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- répond automatiquement au Ping serveur avec un request ping-only `id=1` et conserve Pong observable ;
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- traite le server half-close comme terminaison normale de `pre.009` ;
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- ajoute client half-close, shutdown borné, Drop best-effort et overflow terminal ;
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- conserve les `Status` distants sous forme de diagnostics KSP sûrs sans recopier message/details/metadata ;
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- ajoute les codes `grpc_backpressure_overflow` et `grpc_session_closed`.
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## Fixture locale
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| Cas | Preuve |
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|------------------------|-------------|
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| round-trip bidi | PASS source |
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| mutation request | PASS source |
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| Ping -> ping id=1 | PASS source |
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| Pong observable | PASS source |
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| server half-close | PASS source |
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| client half-close | PASS source |
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| shutdown hostile borné | PASS source |
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| Drop session | PASS source |
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| slow receiver overflow | PASS source |
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| remote Status sûr | PASS source |
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| update malformed | PASS source |
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| inbound oversized | PASS source |
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| outbound oversized | PASS source |
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## Frontières
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```text
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OUT pre.009 : reconnect/resubscribe/from_slot replay policy/gaps/duplicates
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OUT 0.2.9 : SubscribeDeshred
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OUT pre.009 : PublicNode / Config V3 / provider facade
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```
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Aucune dépendance ou feature Cargo n'est ajoutée. Le runtime n'utilise toujours pas `yellowstone-grpc-client` et n'expose aucun type Tonic/protobuf brut.
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## Validation candidate
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```bash
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cargo fmt --all
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python3 scripts/audit_rust_workspace_rules.py
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cargo check --workspace
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cargo clippy --workspace --all-targets
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cargo test -p ksp-onchain-transport-lib
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cargo test -p ksp-core-lib --test workspace_dependencies
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cargo test --workspace
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```
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Le `cargo tree` n'est pas requis : aucune dépendance ni feature n'a changé.
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