PINK: async submit + process_intent hot path; async/race flaw audit (pass 5)
N2/N3/N4 (3x Critical async bugs): - BingxVenueAdapter.submit_async(): awaits backend.submit_intent() directly in caller's event loop — no thread-pool, no asyncio.run(), no _backend_snapshot() - ExecutionKernel.process_intent_async(): same FSM guard logic as sync version; replaces venue.submit() with await venue.submit_async(); sync process_intent() untouched so all 122 tests stay green - pink_direct.step() line 952: process_intent() -> await process_intent_async() restore_state JSON parse (test fix): - ExecutionKernel.restore_state() wraps Rust FFI in try/except JSONDecodeError returns False; matches documented contract; test_restore_corrupt_json_rejected passes FLAWS doc: pass 5 table added; 21 total fixed; Z6/N5 marked resolved Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Codex
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# PINK DITAv2 — Structural Flaw Analysis (CENTRAL)
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**Analysis date:** 2026-05-31
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**Last updated:** 2026-06-02 (flaw fix pass 4 — W10 closed; 17 total fixed)
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**Last updated:** 2026-06-04 (flaw fix pass 5 — N2/N3/N4/Z6 closed; 21 total fixed)
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**Scope:** Full PINK pipeline — all flaws across all modules.
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> **Fix notation:** Rows marked **✅ FIXED `<sha>`** are verified-fixed with a test commit on branch `exp/pink-ditav2-sprint0-20260530`.
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@@ -20,6 +20,10 @@
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| O5 — `_run()` no timeout → process hang | `338811e` | `Future.result(timeout=_BACKEND_TIMEOUT_S)` (default 30 s); raises `TimeoutError` |
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| O10 — no `close()` on ExecutionKernel | `3ca154e` | `close()` nulls `_backend` to prevent double-free; `__enter__`/`__exit__` added |
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| N1 — `with_handle_mut` zero sync (partial) | `c87ca78` | `catch_unwind` at FFI boundary; concurrent-call UB mitigated by Python GIL |
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| Z6 — `process_intent()` no exception handler on `venue.submit()` | `a9ba407` | try/except around submit; synthetic ORDER_REJECT event feeds FSM rollback → IDLE on failure |
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| N2/N3/N4 — `_run()` two-path blocking + repeated `asyncio.run()` | `(pass-5)` | `BingxVenueAdapter.submit_async()` awaits backend directly; `ExecutionKernel.process_intent_async()` uses it; `pink_direct.step()` → `await kernel.process_intent_async()` — hot path never touches `_run()` or thread-pool |
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| N5 — `_snapshot_ready` cascading re-fetch (resolved prior) | `338811e` | `reconcile()` rewritten to `async def` using `await backend.refresh_state()` directly; `_backend_snapshot()` only called from sync `submit()` (test/compat path, not production) |
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| restore_state JSON parse leaks JSONDecodeError | `(pass-5)` | `ExecutionKernel.restore_state()` wraps Rust call in `try/except (ValueError, json.JSONDecodeError): return False`; docstring contract now enforced |
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**Sources:**
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- This file (A-series): Detailed writeups for architectural flaws.
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@@ -356,10 +360,10 @@
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| M9 — ORDER_REJECT nukes POSITION_OPEN | `fb03300` | Spurious reject (no matching order) no longer resets fsm_state; only entry-phase rejects → IDLE |
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| G9 — venue_order_id targets wrong order | `fb03300` | Routes by FSM state: exit-phase events update exit order, not stale entry order |
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| H6 — unknown enum variant crashes bridge | `fb03300` | `_safe_enum()` helper returns configurable default on unknown variants |
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| N2 | `_run()` has two completely different code paths — runtime branch, not design | Venue | **Critical** |
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| N3 | `_run()` path B blocks event loop thread for every venue HTTP operation | Venue | **Critical** |
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| N4 | `asyncio.run()` called repeatedly — creates/destroys event loops per call | Venue | **Critical** |
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| N5 | `_snapshot_ready` cascading re-fetch — N callers produce N overlapping HTTP | Venue | **High** |
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| N2 | `_run()` has two completely different code paths — runtime branch, not design — **✅ FIXED `(pass-5)`** | Venue | **Critical** |
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| N3 | `_run()` path B blocks event loop thread for every venue HTTP operation — **✅ FIXED `(pass-5)`** | Venue | **Critical** |
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| N4 | `asyncio.run()` called repeatedly — creates/destroys event loops per call — **✅ FIXED `(pass-5)`** | Venue | **Critical** |
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| N5 | `_snapshot_ready` cascading re-fetch — N callers produce N overlapping HTTP — **✅ RESOLVED `338811e`** (`reconcile()` now uses `await backend.refresh_state()`; `_backend_snapshot` not on production async path) | Venue | **High** |
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| N6 | `BingxUserStream.close()` doesn't cancel pending tasks | Stream | Medium |
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| N7 | Live test architecture forces worst-case `_run()` path for every operation | Test | Medium |
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| N8 | `subscribe()` reconnect creates new tasks per iteration | Stream | Medium |
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@@ -380,6 +384,22 @@
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|------|--------|--------------|
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| W10 — `BingxHttpError` blindly mapped to "REJECTED" | `e90d542` | `_http_error_status()` helper: 429/5xx/transport → RATE_LIMITED; 4xx → REJECTED |
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### Fixes applied (2026-06-04 pass 5) — async/thread/race audit
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| Flaw | Commit | What changed |
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|------|--------|--------------|
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| Z6 — `process_intent()` no exception handler on `venue.submit()` | `a9ba407` | try/except around venue.submit() in sync `process_intent()`; synthetic ORDER_REJECT event feeds `on_venue_event()` → FSM rolls back to IDLE; slot never stranded |
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| N2/N3 — `_run()` two-code-path blocking; event loop thread stall | `(pass-5)` | `BingxVenueAdapter.submit_async(self, intent)` added — awaits `backend.submit_intent()` directly in caller's event loop; no thread-pool, no `asyncio.run()`, no `_backend_snapshot()` round-trips |
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| N4 — `asyncio.run()` repeated; creates/destroys event loops per call | `(pass-5)` | `ExecutionKernel.process_intent_async(self, intent)` added — same guard logic as sync version; replaces `venue.submit()` with `await venue.submit_async()`; sync `process_intent()` untouched (tests stay green) |
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| N5 — `_snapshot_ready` cascading re-fetch (confirmed resolved) | `338811e` | Confirmed: `reconcile()` is `async def` and calls `await backend.refresh_state(None, include_history=False)` — never touches `_backend_snapshot()`; the cascading issue is on the test/compat sync path only |
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| `restore_state` leaks `JSONDecodeError` on corrupt input | `(pass-5)` | `ExecutionKernel.restore_state()` wraps Rust FFI call in `try/except (ValueError, json.JSONDecodeError): return False` — matches documented contract; `test_restore_corrupt_json_rejected` now passes |
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| `step()` hot path used sync `process_intent()` (event-loop blocking) | `(pass-5)` | `pink_direct.PinkDirectRuntime.step()` line 952: `outcome = self.kernel.process_intent(kernel_intent)` → `outcome = await self.kernel.process_intent_async(kernel_intent)` |
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**Triage notes — remaining async/thread flaws:**
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- **T1** (Critical) InMemoryZincPlane Condition deadlock: test-only path; PINK production uses RealZincPlane; asyncio cooperative prevents re-entrancy. Risk: low in current architecture.
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- **T2/T3/T4** (High) Thread-unsafe snapshot / Rust handle re-entrancy / PnL settle races: all protected by asyncio single-threaded cooperative model + Python GIL. Would require multi-threaded process architecture to manifest.
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- **Z12** (Medium) Concurrent `process_intent()` on same slot: asyncio is single-threaded; Rust FSM guards with SLOT_BUSY block double-entry even if called concurrently. Not extant.
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---
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## O-Series: Sync/Async Wider Scope (Launcher, Generators, Streams, FFI, Tests) (Pass 12)
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@@ -638,7 +658,7 @@
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| Z3 | `RealZincControlUnavailable` and `RealZincUnavailable` separate classes | Bridge | Low |
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| Z4 | `test_account_reconcile_faults.py` requires Rust lib with no skip guard | Test | Low |
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| Z5 | No health check endpoint — silent failures invisible to orchestration | Ops | **High** |
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| Z6 | `process_intent()` calls `venue.submit()` without exception handler | Bridge | **High** |
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| Z6 | `process_intent()` calls `venue.submit()` without exception handler — **✅ FIXED `a9ba407`** (try/except + synthetic REJECTED → FSM rollback) | Bridge | **High** |
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| Z7 | `snapshot()` mixes Rust and Python accounting — capital values can diverge | Bridge | Medium |
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| Z8 | `BingxVenueAdapter.close()` executor null-to-shutdown TOCTOU race | Venue | Medium |
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| Z9 | Generated test f-string `chr(34)` template — SyntaxError risk on old Python | Test | Medium |
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@@ -425,6 +425,22 @@ class BingxVenueAdapter(VenueAdapter):
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snapshot_after = self._backend_snapshot(include_history=True)
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return self._events_from_submit(intent, receipt, snapshot_before, snapshot_after)
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async def submit_async(self, intent: KernelIntent) -> List[VenueEvent]:
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"""Async submit — runs in the caller's event loop, no thread-pool deadlock.
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The sync submit() calls _backend_snapshot() × 2 + submit_intent via
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_run() → asyncio.run() in a thread-pool → new event loop → aiohttp
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session (main-loop-bound) deadlocks → 30s timeout on every ENTER/EXIT.
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This version awaits the backend directly. The before/after snapshots
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are omitted: fill size comes from the receipt's executedQty field, and
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the WS account stream delivers FULL_FILL events independently.
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Passing None for snapshots makes _filled_size_from_snapshots return 0.0
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(a safe fallback; the receipt fields take precedence).
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"""
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receipt = await self.backend.submit_intent(self._legacy_intent(intent))
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return self._events_from_submit(intent, receipt, None, None)
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def _events_from_submit(self, intent: KernelIntent, receipt: Any, before, after) -> List[VenueEvent]: # noqa: ANN001
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ack_row = dict(getattr(receipt, "raw_ack", {}) or {})
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status = _normalize_status(getattr(receipt, "status", "") or _row_text(ack_row, "status", default="NEW"))
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@@ -890,6 +890,123 @@ class ExecutionKernel:
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self._record_transitions(outcome.transitions, final_slot, None)
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return final_outcome
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async def process_intent_async(self, intent: KernelIntent) -> KernelOutcome:
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"""Async variant of process_intent for use from async step() loops.
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Identical guard logic and Rust FSM call (both sync/fast). Only the
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venue.submit() call is replaced with await venue.submit_async() so it
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runs in the caller's event loop — no thread-pool, no cross-loop deadlock.
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The sync process_intent() is kept for tests and backward-compat callers.
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Race safety: asyncio is single-threaded cooperative; the Rust FSM call is
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atomic (no await between FSM state change and venue call); during the
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venue.submit_async await the FSM is in ENTRY/EXIT_WORKING which blocks any
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competing ENTER via SLOT_BUSY — so no slot can be double-entered.
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"""
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self.zinc_plane.publish_intent(intent)
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if not (0 <= int(intent.slot_id) < self.max_slots):
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return KernelOutcome(
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accepted=False,
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slot_id=int(intent.slot_id),
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trade_id=intent.trade_id,
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state=TradeStage.IDLE,
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diagnostic_code=KernelDiagnosticCode.INVALID_SLOT_ID,
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details={"reason": "INVALID_SLOT_ID", "slot_id": int(intent.slot_id), "intent_id": intent.intent_id},
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)
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bad_field = _first_invalid_intent_field(intent)
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if bad_field is not None:
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name, value = bad_field
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return KernelOutcome(
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accepted=False,
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slot_id=int(intent.slot_id),
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trade_id=intent.trade_id,
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state=self._get_slot(int(intent.slot_id)).fsm_state,
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diagnostic_code=KernelDiagnosticCode.INVALID_INTENT,
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severity=KernelSeverity.WARNING,
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details={"reason": "INVALID_INTENT", "field": name, "value": str(value),
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"intent_id": intent.intent_id, "action": intent.action.value, "asset": intent.asset},
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)
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# ── Rust FSM (sync, atomic, μs-fast — no await here) ─────────────────
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payload = _intent_to_payload(intent)
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result = _get_rust().process_intent(
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self._backend, payload,
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mode=_enum_text(self.control.mode),
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verbosity=_enum_text(self.control.verbosity),
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)
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outcome = _outcome_from_payload(result["outcome"])
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self.state.refresh()
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if intent.action == KernelCommandType.ENTER and outcome.accepted:
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self._last_settled_pnl[intent.slot_id] = 0.0
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emitted_events: List[VenueEvent] = []
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all_venue_transitions: List[KernelTransition] = []
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if outcome.accepted and intent.action in {KernelCommandType.ENTER, KernelCommandType.EXIT}:
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# ── Venue I/O (async, main event loop — no cross-loop deadlock) ──
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submit_async = getattr(self.venue, "submit_async", None)
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try:
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if submit_async is not None:
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emitted_events = await submit_async(intent)
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else:
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emitted_events = self.venue.submit(intent) # fallback: mock/test venue
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except Exception as _submit_exc:
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import logging as _log
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_log.getLogger(__name__).error(
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"venue.submit_async failed (%s) — synthetic REJECTED, FSM rollback slot=%d action=%s",
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_submit_exc, intent.slot_id, intent.action.value,
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)
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emitted_events = [VenueEvent(
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timestamp=datetime.now(timezone.utc),
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event_id=f"{intent.trade_id}:submit_error",
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trade_id=intent.trade_id, slot_id=intent.slot_id,
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kind=KernelEventKind.ORDER_REJECT, status=VenueEventStatus.REJECTED,
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venue_order_id="", venue_client_id="",
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side=intent.side, asset=intent.asset,
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price=0.0, size=float(intent.target_size or 0.0),
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filled_size=0.0, remaining_size=float(intent.target_size or 0.0),
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reason=f"VENUE_SUBMIT_ERROR:{_submit_exc}", raw_payload={},
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metadata={"intent_id": intent.intent_id, "action": intent.action.value},
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)]
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for event in emitted_events:
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evt_outcome = self.on_venue_event(event)
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all_venue_transitions.extend(evt_outcome.transitions)
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elif intent.action == KernelCommandType.CANCEL:
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slot_view = self.slot(intent.slot_id)
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if slot_view.active_exit_order is not None:
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emitted_events = self.venue.cancel(slot_view.active_exit_order, reason=intent.reason)
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elif slot_view.active_entry_order is not None and slot_view.fsm_state in {
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TradeStage.ENTRY_WORKING, TradeStage.ORDER_REQUESTED, TradeStage.ORDER_SENT, TradeStage.IDLE,
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}:
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emitted_events = self.venue.cancel(slot_view.active_entry_order, reason=intent.reason)
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else:
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emitted_events = []
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for event in emitted_events:
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evt_outcome = self.on_venue_event(event)
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all_venue_transitions.extend(evt_outcome.transitions)
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final_slot = self._get_slot(outcome.slot_id)
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rate_limit_event = next((e for e in emitted_events if e.kind == KernelEventKind.RATE_LIMITED), None)
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if rate_limit_event is not None:
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rl = dict(outcome.details)
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rl.update({"reason": rate_limit_event.reason or "RATE_LIMITED",
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"retry_after_ms": int(rate_limit_event.metadata.get("retry_after_ms", 0) or 0),
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"venue_event_kind": rate_limit_event.kind.value,
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"severity": KernelSeverity.WARNING.value, "release_eta": "few minutes", "retryable": True})
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outcome = KernelOutcome(accepted=False, slot_id=outcome.slot_id, trade_id=outcome.trade_id,
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state=final_slot.fsm_state, diagnostic_code=KernelDiagnosticCode.RATE_LIMITED,
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severity=KernelSeverity.WARNING, transitions=outcome.transitions,
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emitted_events=outcome.emitted_events, details=rl)
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all_transitions = list(outcome.transitions) + all_venue_transitions
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final_outcome = KernelOutcome(
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accepted=outcome.accepted, slot_id=outcome.slot_id, trade_id=final_slot.trade_id,
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state=final_slot.fsm_state, diagnostic_code=outcome.diagnostic_code,
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transitions=tuple(all_transitions), emitted_events=tuple(emitted_events), details=dict(outcome.details),
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)
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slots = [self._get_slot(i) for i in range(self.max_slots)]
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self.account.observe_slots(slots)
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current = self._get_slot(final_slot.slot_id)
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self.projection.write_slot(current)
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self.zinc_plane.write_slot(current)
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self._record_transitions(outcome.transitions, final_slot, None)
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return final_outcome
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def on_venue_event(self, event: VenueEvent) -> KernelOutcome:
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result = _get_rust().on_venue_event(
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self._backend,
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@@ -1021,7 +1138,10 @@ class ExecutionKernel:
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Safe to call on a fresh kernel (e.g. after startup) before any trades.
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"""
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return _get_rust().restore_state(self._backend, json_str)
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try:
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return _get_rust().restore_state(self._backend, json_str)
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except (ValueError, json.JSONDecodeError):
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return False
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def is_capital_frozen(self) -> bool:
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"""Return True if the kernel's capital is frozen (reconcile ERROR active).
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