guard allowance derived

{
  "input": {
    "body": {
      "calldata": {
        "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "data": "0x095ea7b30000000000000000000000002626664c2603336e57b271c5c0b26f421741e4810000000000000000000000000000000000000000000000000000000000000000",
        "from": "0x9F2C5E4A8db1C3a7E6B0d4f8C1E2a5b7D9C0e3F4"
      }
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "ok": true,
      "result": {
        "rpc": {
          "endpoints": [],
          "reachable": null,
          "configured": false
        },
        "chain": "eip155:8453",
        "delta": {
          "detail": "this sets the allowance to zero, which cannot increase exposure whatever it is now; the value being replaced could not be read, so whether it is a reduction or already zero is unknown",
          "direction": "unknown",
          "difference": null,
          "increases_exposure": false
        },
        "token": {
          "detail": "no RPC configured, so code presence could not be read; no RPC configured, so token metadata could not be read",
          "symbol": null,
          "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
          "decimals": null,
          "has_code": null,
          "code_size": null,
          "is_erc721": null,
          "total_supply": null
        },
        "decode": {
          "source": "bundled-abi",
          "selector": "0x095ea7b3",
          "signature": "approve(address,uint256)",
          "candidates": []
        },
        "current": {
          "amount": null,
          "detail": "no RPC endpoint is configured, so the allowance this spender already holds could not be read",
          "source": "unreadable",
          "expiration": null
        },
        "request": {
          "kind": "erc20_approve",
          "mode": "absolute",
          "owner": "0x9f2C5E4a8DB1C3A7e6b0d4f8C1e2A5b7d9c0E3f4",
          "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
          "amount": "0",
          "target": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
          "spender": "0x2626664c2603336E57B271c5C0b26F421741e481",
          "summary": "Revoke 0x2626664c2603336E57B271c5C0b26F421741e481's allowance on token 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 by setting it to zero.",
          "deadline": null,
          "token_id": null,
          "expiration": null
        },
        "spender": {
          "proxy": {
            "kind": "unknown",
            "admin": null,
            "beacon": null,
            "detail": "no RPC endpoint is configured, so no slot could be read",
            "address": "0x2626664c2603336E57B271c5C0b26F421741e481",
            "upgradeable": null,
            "slots_probed": [],
            "implementation": null
          },
          "detail": "no RPC endpoint is configured, so it is unknown whether the spender has code",
          "address": "0x2626664c2603336E57B271c5C0b26F421741e481",
          "is_contract": null
        },
        "input_shape": "calldata",
        "denylist_hits": [],
        "classification": {
          "basis": "the allowance is zero, which is bounded without reference to the token's supply",
          "scope": "bounded",
          "subject": "resulting_allowance",
          "total_supply": null,
          "supply_checked": true,
          "resulting_allowance": "0"
        }
      },
      "verdict": "allow",
      "evidence": [
        {
          "code": "CURRENT_ALLOWANCE_UNREADABLE",
          "detail": "The allowance 0x2626664c2603336E57B271c5C0b26F421741e481 already holds could not be read: no RPC endpoint is configured, so the allowance this spender already holds could not be read. Whether this request adds to an existing allowance or replaces one is therefore unknown. It does not change the answer: this request cannot increase what the spender can move.",
          "source": "rpc",
          "severity": "info"
        },
        {
          "code": "SPENDER_CODE_UNREADABLE",
          "detail": "Whether 0x2626664c2603336E57B271c5C0b26F421741e481 is a contract or an account could not be determined: no RPC endpoint is configured, so it is unknown whether the spender has code. It does not change the answer: this request cannot increase what the spender can move.",
          "source": "rpc",
          "severity": "info"
        },
        {
          "code": "SPENDER_PROXY_OPAQUE",
          "detail": "The code that would execute on 0x2626664c2603336E57B271c5C0b26F421741e481's behalf could not be resolved: no RPC endpoint is configured, so no slot could be read. An allowance to a contract whose executing code is unknown is an allowance to unknown code. It does not change the answer: this request cannot increase what the spender can move.",
          "source": "rpc",
          "severity": "info"
        }
      ],
      "warnings": [],
      "confidence": 1,
      "risk_codes": [],
      "request_hash": "sha256:a88cb1eea90d411505068349493a5cf35a1f2b46f4cbb4185330ffd4094c65fb",
      "data_versions": {
        "chain": "eip155:8453",
        "policy": "2026-09-19",
        "denylist": "2026-08-03.1",
        "abi_packs": "2026-08-03.1",
        "signature_index": "2026-08-03.1",
        "allowance_sentinels": "4"
      },
      "policy_version": "2026-09-19"
    }
  }
}