{
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  "generated_at_utc": "2026-10-24T21:35:02.243Z",
  "record_id": "VXI-EXT-PROCUREMENT-X402-DELEGATION-SIMULATION-SETTLEMENT-RACE-01-v1",
  "record_kind": "external_reference",
  "title": "x402 delegation changes after simulation",
  "system": "x402 Foundation",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Can a successful x402 ERC-7710 simulation guarantee that the later transfer will execute?",
  "near_questions": [
    "Can an x402 delegation be revoked after simulation?",
    "Who pays gas if ERC-7710 authority changes before settlement?",
    "Does x402 simulate the same authority that later executes?",
    "Is every ERC-7710 permission context interchangeable?"
  ],
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    {
      "claim": "The pinned EVM binding verifies ERC-7710 authority through simulation. Its security discussion identifies a race in which the client invalidates delegation before execution, leaving the facilitator paying gas for a failed transaction. The permission context depends on the particular delegation-manager implementation.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
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    "Buyer deployment testing, live runtime enforcement, certification or permission to act",
    "Expanded capabilities or licences for existing INDEX executables"
  ],
  "public_summary": "The pinned EVM binding verifies ERC-7710 authority through simulation. Its security discussion identifies a race in which the client invalidates delegation before execution, leaving the facilitator paying gas for a failed transaction. The permission context depends on the particular delegation-manager implementation.",
  "related_record_ids": [],
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    "source_type": "official_external_documentation",
    "source_title": "Scheme: `exact` on `EVM`",
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    "method": "Primary documentation reviewed for the published bounded statement.",
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    "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research."
  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "The pinned EVM binding verifies ERC-7710 authority through simulation. Its security discussion identifies a race in which the client invalidates delegation before execution, leaving the facilitator paying gas for a failed transaction. The permission context depends on the particular delegation-manager implementation.",
    "required_buyer_context": "Delegation manager and permission context; Simulation time and resulting authority evidence; Execution receipt, transfer result and gas cost. Buyer deployment not inspected.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "decision_profile": {
    "schema": "varexis-vendor-evidence-review/1",
    "review_status": "documentation_review_only",
    "checked_on": "2026-10-24",
    "claim_to_check": "Can a successful x402 ERC-7710 simulation guarantee that the later transfer will execute?",
    "documented_statement": {
      "status": "documented",
      "statement": "The pinned EVM binding verifies ERC-7710 authority through simulation. Its security discussion identifies a race in which the client invalidates delegation before execution, leaving the facilitator paying gas for a failed transaction. The permission context depends on the particular delegation-manager implementation.",
      "source_ids": [
        "x402-evm"
      ]
    },
    "review_inference": {
      "status": "review_inference",
      "statement": "Separate a simulated authority check from executed payment and facilitator cost. This is a review decision, not an observed buyer result.",
      "source_ids": [
        "x402-evm"
      ]
    },
    "buyer_evidence_required": [
      "Delegation manager and permission context",
      "Simulation time and resulting authority evidence",
      "Execution receipt, transfer result and gas cost"
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Do not treat simulation success as a guaranteed later transfer."
    },
    "unknowns": "No delegation manager, live authority or network transaction has been validated.",
    "unknown_finding": {
      "status": "unknown",
      "statement": "No delegation manager, live authority or network transaction has been validated."
    },
    "evidence_sources": [
      {
        "source_id": "x402-evm",
        "url": "https://raw.githubusercontent.com/x402-foundation/x402/4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54/specs/schemes/exact/scheme_exact_evm.md",
        "final_url": "https://raw.githubusercontent.com/x402-foundation/x402/4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54/specs/schemes/exact/scheme_exact_evm.md",
        "status": 200,
        "captured_at_utc": "2026-10-24T21:23:34.241Z",
        "sha256": "186111e25a5bdd5be839635ba1c441885567de09b57bdd93f78e465ca3b8e792",
        "bytes": 21131,
        "title": "Scheme: `exact` on `EVM`",
        "hash_basis": "Decoded HTTP response body bytes",
        "rights_review": "Original factual paraphrase and source metadata only; Apache-2.0 repository captures retained privately and not redistributed.",
        "checked_on": "2026-10-24",
        "capture_status": 200,
        "claim_review_completed": true,
        "reviewed_sections": [
          "1. AssetTransferMethod: EIP-3009 — Phase 3: Settlement Logic",
          "2. AssetTransferMethod: Permit2 — Phase 4: Settlement Logic",
          "3. AssetTransferMethod: ERC-7710 — Verification Logic",
          "Security Considerations",
          "ERC-7710 Delegation Managers",
          "2. AssetTransferMethod: Permit2 — Phase 1: One-Time Gas Approval",
          "Phase 2: PAYMENT-SIGNATURE Header Payload"
        ],
        "version_context": "Pinned x402-foundation/x402 revision 4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54 captured 2026-10-24. Documentation revision, not evidence that any buyer deployment conforms."
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Documentation review only; the buyer must establish applicability and actual outcomes. INDEX does not inspect or control the deployment.",
    "paid_value": {
      "decision_context": "Separate a simulated authority check from executed payment and facilitator cost.",
      "free": "Complete review, sources, practical questions and limitations; may be saved locally.",
      "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.",
      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
      "excluded": [
        "Fresh vendor research",
        "Continuous monitoring or change alerts",
        "Testing the buyer configuration",
        "Private evidence or vendor certification"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Recheck the pinned specification against the selected scheme, network, provider version and buyer evidence before relying on a current outcome."
    },
    "buyer_relevance": "Separate a simulated authority check from executed payment and facilitator cost.",
    "refusal_conditions": [
      "Do not treat simulation success as a guaranteed later transfer."
    ]
  },
  "niche": {
    "niche_id": "agent-authority-action-evidence",
    "label": "Agent Authority & Action Evidence",
    "classification_id": "payments",
    "classification_label": "Agent Payments, Authority & Transaction Evidence",
    "topic_id": "payments",
    "buyer_intent": "Separate a simulated authority check from executed payment and facilitator cost.",
    "comparison_role": "supplementary_discovery"
  },
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "single_request",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#x402-delegation-simulation-settlement-race",
  "machine_readable_record": "/varexis-index/records/x402-delegation-simulation-settlement-race.json"
}