starknet_getClassAt

Get the contract class definition in the given block at the given address

Parameters

Parameter	Type	Description
block_id	string	Block reference ("latest", "l1_accepted", block hash, or block number)
contract_address	felt252	Contract address

Request

{
  "jsonrpc": "2.0",
  "method": "starknet_getClassAt",
  "params": [
    {
      "block_hash": "0x05abbad1e5"
    },
    "0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
  ],
  "id": 1
}

Returns

The contract class

Contract class definition with Sierra program, entry points, and ABI

Errors

Code	Message
24	Block not found
20	Contract not found

Examples

cURL

curl -X POST https://api-starknet-mainnet.n.dwellir.com/YOUR_API_KEY \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "starknet_getClassAt",
    "params": [
      {
        "block_hash": "0x05abbad1e5"
      },
      "0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
    ],
    "id": 1
  }'

JavaScript

import { RpcProvider } from 'starknet';

const provider = new RpcProvider({
  nodeUrl: 'https://api-starknet-mainnet.n.dwellir.com/YOUR_API_KEY',
});

const payload = {
  method: 'starknet_getClassAt',
  params: [
    {
      "block_hash": "0x05abbad1e5"
    },
    "0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
  ]
};

const result = await provider.fetchEndpoint(payload.method, payload.params);
console.log(result);