{
  "method": "Actual public x402 facilitator settlement, then real ESP32-C6 BLE measurement. Independent buyer verification uses the USB-provisioned P-256 pin. RPC confirmed exact USDC token changes.",
  "payment_mode": "Solana Devnet USDC; test funds",
  "purchase": {
    "purchase_id": "3e063c69ce654ed1",
    "challenge": {
      "id": "3e063c69ce654ed1",
      "nonce": 1329448120,
      "created_at": 1790881722,
      "location": "demo-gate",
      "max_age_seconds": 10
    },
    "settlement": {
      "success": true,
      "payer": "2U7Bz5u4bVMsUtNcF4b4xdWG7K3N7WmbsGCqMQmjevMf",
      "transaction": "4XSokajCzpoKy7bEQGF6NPpsvVLjo4Q5bSuH73hiuiXP23PbhuHN8pWeJ9fBxwjGk58iiv1Xqu5MTTmwQGggnBLw",
      "network": "solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1"
    },
    "decision": "DISPATCH",
    "evidence_age_seconds": 7,
    "receipt_identity": "pinned-device-p256",
    "receipt": {
      "protocol": "capmesh/0.1",
      "request_id": "3e063c69ce654ed1",
      "status": "success",
      "provider": "esp32-c6-96a2",
      "capability": "state.observe",
      "parameters": {
        "location": "demo-gate"
      },
      "result": {
        "metric": "gate.closed",
        "sensor": "gpio9-contact",
        "closed": false,
        "stable_samples": 5,
        "total_samples": 5
      },
      "started_at": 1790881734,
      "completed_at": 1790881734,
      "delivery_proof": null,
      "authorization_ref": null,
      "receipt_signature": "v3:vYhCK5GpQGZyRMva9LRWXLqEiagFzksnj6LF8XMfJS33I4qHO9kQTnJOE0DY3XGgrqvOSXPwjptYwGvnmQqaaA==",
      "error": null,
      "nonce": 1329448120
    }
  },
  "chain_check": {
    "slot": 506374923,
    "block_time": 1790881722,
    "transaction_error": null,
    "mint": "4zMMC9srt5Ri5X14GAgXhaHii3GnPAEERYPJgZJDncDU",
    "token_changes": [
      {
        "owner": "CaQAKBcwf7G5vXeu2RNuNGJafnJ8724Uj4wv9ivfxfQA",
        "account_index": 2,
        "delta_base_units": 1000,
        "decimals": 6
      },
      {
        "owner": "2U7Bz5u4bVMsUtNcF4b4xdWG7K3N7WmbsGCqMQmjevMf",
        "account_index": 3,
        "delta_base_units": -1000,
        "decimals": 6
      }
    ]
  }
}