{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-24T21:35:02.243Z",
  "record_id": "VXI-EXT-PROCUREMENT-X402-SOLANA-SPONSOR-POLICY-SEPARATE-01-v1",
  "record_kind": "external_reference",
  "title": "x402 Solana payment validity and fee sponsorship",
  "system": "x402 Foundation",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Must a sponsor accept every transaction valid under x402 Solana exact?",
  "near_questions": [
    "Can an x402 Solana sponsor reject a valid transfer?",
    "Are x402 payment checks the same as sponsor fee policy?",
    "What limits facilitator fee exposure on Solana?",
    "Does x402 guarantee sponsored transaction submission?"
  ],
  "supported_claims": [
    {
      "claim": "The pinned binding separates the required payment outcome from sponsor acceptance policy. A sponsor may reject an otherwise valid payment on local policy grounds. Recommended controls include compute and priority-fee limits and program restrictions; successful payment validation does not entitle the client to sponsorship.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "Independent verification of payment, delivery or deployed controls",
    "Configured sponsor limits and implementation behaviour remain unverified.",
    "Buyer deployment testing, live runtime enforcement, certification or permission to act",
    "Expanded capabilities or licences for existing INDEX executables"
  ],
  "public_summary": "The pinned binding separates the required payment outcome from sponsor acceptance policy. A sponsor may reject an otherwise valid payment on local policy grounds. Recommended controls include compute and priority-fee limits and program restrictions; successful payment validation does not entitle the client to sponsorship.",
  "related_record_ids": [],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "Exact Payment Scheme for Solana Virtual Machine (SVM) (`exact`)",
    "source_url": "https://raw.githubusercontent.com/x402-foundation/x402/4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54/specs/schemes/exact/scheme_exact_svm.md",
    "checked_on": "2026-10-24",
    "candidate_record_id": "VXI-EXT-PROCUREMENT-X402-SOLANA-SPONSOR-POLICY-SEPARATE-01-v1",
    "candidate_record_sha256": "a7fe03d15b7fc2a0352bb8bde05b8fda2921119395975d7169c7fb37fb88c92a",
    "method": "Primary documentation reviewed for the published bounded statement.",
    "deployment_tested_by_varexis": false,
    "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 binding separates the required payment outcome from sponsor acceptance policy. A sponsor may reject an otherwise valid payment on local policy grounds. Recommended controls include compute and priority-fee limits and program restrictions; successful payment validation does not entitle the client to sponsorship.",
    "required_buyer_context": "Payment outcome validation; Sponsor program and fee policies; Requested compute and priority-fee parameters. 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": "Must a sponsor accept every transaction valid under x402 Solana exact?",
    "documented_statement": {
      "status": "documented",
      "statement": "The pinned binding separates the required payment outcome from sponsor acceptance policy. A sponsor may reject an otherwise valid payment on local policy grounds. Recommended controls include compute and priority-fee limits and program restrictions; successful payment validation does not entitle the client to sponsorship.",
      "source_ids": [
        "x402-svm"
      ]
    },
    "review_inference": {
      "status": "review_inference",
      "statement": "Budget the facilitator exposure separately from the buyer transfer amount. This is a review decision, not an observed buyer result.",
      "source_ids": [
        "x402-svm"
      ]
    },
    "buyer_evidence_required": [
      "Payment outcome validation",
      "Sponsor program and fee policies",
      "Requested compute and priority-fee parameters"
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Do not infer sponsorship approval from payment validity alone."
    },
    "unknowns": "Configured sponsor limits and implementation behaviour remain unverified.",
    "unknown_finding": {
      "status": "unknown",
      "statement": "Configured sponsor limits and implementation behaviour remain unverified."
    },
    "evidence_sources": [
      {
        "source_id": "x402-svm",
        "url": "https://raw.githubusercontent.com/x402-foundation/x402/4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54/specs/schemes/exact/scheme_exact_svm.md",
        "final_url": "https://raw.githubusercontent.com/x402-foundation/x402/4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54/specs/schemes/exact/scheme_exact_svm.md",
        "status": 200,
        "captured_at_utc": "2026-10-24T21:23:34.435Z",
        "sha256": "d12110e7b880ce1e137ea2c41cc4daca5fc86aa8f724b0c816c310bb31b5941e",
        "bytes": 23100,
        "title": "Exact Payment Scheme for Solana Virtual Machine (SVM) (`exact`)",
        "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": [
          "1.1 Required Payment Outcome",
          "1.2 Payment Identification",
          "1.4 Exactly One Matching Transfer",
          "2. Sponsor Acceptance Policy",
          "2.2 Cost and Griefing Controls",
          "2.3 Policy Flexibility",
          "2.1.1 Fee Payer Isolation",
          "2.1.2 Address Lookup Table Visibility",
          "3.4 Post-Settlement Verification",
          "Duplicate Settlement Mitigation"
        ],
        "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": "Budget the facilitator exposure separately from the buyer transfer amount.",
      "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": "Budget the facilitator exposure separately from the buyer transfer amount.",
    "refusal_conditions": [
      "Do not infer sponsorship approval from payment validity alone."
    ]
  },
  "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": "Budget the facilitator exposure separately from the buyer transfer amount.",
    "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-solana-sponsor-policy-separate",
  "machine_readable_record": "/varexis-index/records/x402-solana-sponsor-policy-separate.json"
}