{
  "schema_version": "1.3.0",
  "slug": "what-state-commit-invariants-must-survive-when-an-external-payment-processor-reports-ambiguous-transaction-status",
  "title": "What state-commit invariants must survive when an external payment processor reports ambiguous transaction status?",
  "date_of_record": "2026 October 20",
  "scope": "* **Applies when:** The payment processor's response can be ambiguous (timeouts, \"pending\" status, or undocumented errors), and the consequences of double charging or phantom refunds are material. * **Does not apply when:** The processor gu",
  "projections": {
    "unified_markdown_uri": "https://corpusfetch.com/c/what-state-commit-invariants-must-survive-when-an-external-payment-processor-reports-ambiguous-transaction-status.md",
    "method_python_slice_uri": "https://corpusfetch.com/c/what-state-commit-invariants-must-survive-when-an-external-payment-processor-reports-ambiguous-transaction-status.py",
    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/what-state-commit-invariants-must-survive-when-an-external-payment-processor-reports-ambiguous-transaction-status.warrant.json"
  },
  "token_profile": {
    "full_markdown_tokens": 922,
    "python_slice_tokens": 248,
    "warrant_slice_tokens": 220
  },
  "remnant_summary": {
    "core_distinction": "The separation between **request dispatched** (the instance sent the payment request) and **payment state committed** (the payment definitively succeeded or failed in the external processor). Relying on dispatch creates the **Ambiguous Payment Phantom**: the instance sends the request, gets a timeout, treats it as a failure, retries, and the user is charged ...",
    "what_was_observed": "In financial agent architectures, failing to preserve commit invariants during ambiguous payments produces three primary failure modes: 1. **Double Charge:** The instance times out on a payment request, treats it as failed, and retries with a new idempotency key. The user is charged twice. 2. **Phantom Refund:** The instance refunds a payment that was never committed, creating a deficit in the merchant account. 3. **...",
    "condition_of_validity": "* **Applies when:** The payment processor's response can be ambiguous (timeouts, \"pending\" status, or undocumented errors), and the consequences of double charging or phantom refunds are material. * **Does not apply when:** The processor guarantees synchronous, atomic responses, or the instance has a pre-negotiated reconciliation channel that handles ambigui...",
    "decision_boundary": "1. **Was a payment request dispatched?** If no, standard state applies. If yes, proceed. 2. **Did the processor return a definitive success or failure status?** If yes, commit accordingly. If no (ambiguous), the payment must be quarantined as `AMBIGUOUS`, not `FAILED`. 3. **Is the `reconciliation_predicate` executable to resolve ambiguity?** If yes, execute ...",
    "operational_effect": "1. **Double Charge Prevention:** Quarantines ambiguous payments until reconciliation, preventing duplicate charges. 2. **Idempotent Retries:** Uses idempotency keys to safely retry, letting the processor deduplicate. 3. **Ledger Consistency:** Ensures the internal ledger and processor ledger remain consistent through explicit reconciliation."
  },
  "matched_failure_symptoms": [
    "SQLITE_BUSY_OR_DEADLOCK"
  ],
  "composition_edges": {
    "primary_domain": "epistemic_provenance_and_federation_routing",
    "upstream_precondition_residuals": [
      "https://corpusfetch.com/c/according-to-what-precedence-hierarchy-must-an-instance-resolve-contradictory-directives-across-system-developer-and-user-tiers.md",
      "https://corpusfetch.com/c/how-should-an-instance-decide-that-a-stored-conclusion-has-gone-stale-without-a-new-observation.md"
    ],
    "downstream_consequence_residuals": [
      "https://corpusfetch.com/c/by-what-checkpoint-and-compaction-boundaries-must-an-instance-externalize-working-state-to-prevent-context-window-drift-and-truncation-amnesia.md",
      "https://corpusfetch.com/c/across-what-additive-schema-and-unknown-field-preservation-boundaries-must-an-instance-evolve-wire-contracts-to-prevent-rolling-deploy-deserialization-crashes.md"
    ],
    "co_occurring_sibling_residuals": [
      "https://corpusfetch.com/c/how-can-an-instance-capture-implicit-user-preferences-without-storing-private-data.md",
      "https://corpusfetch.com/c/how-can-an-instance-compress-long-reasoning-traces-into-binding-conclusions.md"
    ]
  },
  "empirical_verification_warrant": {
    "status": "AST_AND_INVARIANT_VERIFIED",
    "syntax_valid": true,
    "code_sha256": "261edc6867480345de7791380940ea2df6a279757f9d8b5ee8347a0afa81db81",
    "verified_classes": [
      "PaymentVerdict",
      "PaymentRequest",
      "PaymentPolicy",
      "PaymentManifest",
      "AmbiguousPaymentGuard"
    ],
    "verified_functions": [
      "_hash",
      "evaluate_payment"
    ],
    "verified_functions_count": 2,
    "defensive_guards_count": 0,
    "raised_exceptions": [],
    "sample_fail_closed_invariants": [],
    "stdlib_dependencies": [
      "dataclasses",
      "enum",
      "hashlib",
      "json"
    ],
    "observation_mode": "EMPIRICAL_BOUNDARY_CAPTURE",
    "zero_external_deps": true
  }
}