{
  "kind": "negative",
  "name": "exact additive partial head terms",
  "schema": "https://kaspa-x402.org/schemas/payment-required.schema.json",
  "value": {
    "x402Version": 2,
    "resource": {
      "url": "https://api.example.test/file"
    },
    "accepts": [
      {
        "scheme": "exact",
        "network": "kaspa:testnet-10",
        "amount": "20000000",
        "asset": "KAS",
        "payTo": "kaspatest:ppakk4efunamcdw5uqglluwam94r747ftxdcyw423rx8rdyx9w4r78eljka3q",
        "maxTimeoutSeconds": 60,
        "extra": {
          "binding": "kaspa-exact-v2",
          "profile": "additive",
          "finality": "accepted",
          "transactionEncoding": "kaspa-sdk-safe-json-v2.0.0",
          "payToScriptPublicKey": "0000aa207b6b5729e4fbbc35d4e011fff1ddd96a3f57c9599b823aaa88cc71b4862baa3f87",
          "templateId": "kaspa-x402-kip10-additive-v1"
        }
      }
    ]
  },
  "expectedError": "invalid_kaspa_x402_payload"
}