Decode a 4-byte function selector to its signature(s)

Fragmentos de código

curl "https://api.oanor.com/ethsignatures-api/v1/function" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/ethsignatures-api/v1/function", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/ethsignatures-api/v1/function");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);

import requests
requests.get(
    "https://api.oanor.com/ethsignatures-api/v1/function",
    headers={"x-oanor-key": "oanor_test_..."}
)

Respuesta de ejemplo

Una respuesta real de este endpoint, capturada en la última comprobación de estado.

{
    "data": {
        "note": "All function signatures whose keccak-256 hash starts with this 4-byte selector. most_likely (lowest id) is the original / canonical one; the rest are hash collisions.",
        "count": 6,
        "source": "4byte.directory",
        "signatures": [
            {
                "id": 145,
                "most_likely": true,
                "text_signature": "transfer(address,uint256)"
            },
            {
                "id": 31780,
                "most_likely": false,
                "text_signature": "many_msg_babbage(bytes1)"
            },
            {
                "id": 161159,
                "most_likely": false,
                "text_signature": "transfer(bytes4[9],bytes5[6],int48[11])"
            },
            {
                "id": 313067,
                "most_likely": false,
                "text_signature": "func_2093253501(bytes)"
            },
            {
                "id": 844280,
                "most_likely": false,
                "text_signature": "join_tg_invmru_haha_fd06787(address,bool)"
            },
            {
                "id": 1111734,
                "most_likely": false,
                "text_signature": "workMyDirefulOwner(uint256,uint256)"
            }
        ],
        "most_likely": "transfer(address,uint256)",
        "hex_signature": "0xa9059cbb"
    },
    "meta": {
        "timestamp": "2026-06-14T08:04:18.714Z",
        "request_id": "89d2c275-2ceb-43a9-a3f2-8f5606f346d8"
    },
    "status": "ok",
    "message": "Function signature decoded successfully",
    "success": true
}