> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-fix-dead-service-links.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# eth_getCode

> Get the bytecode at a given address

Defined in the [Ethereum JSON-RPC Specification](https://ethereum.org/en/developers/docs/apis/json-rpc/)

<Info>
  Returns the bytecode at a given address. This is useful for verifying if an address is a contract or an externally owned account.
</Info>

## Parameters

<ParamField body="address" type="string" required>
  The address to get bytecode from (20 bytes).
</ParamField>

<ParamField body="blockParameter" type="string" required>
  Integer block number, or the string "latest", "earliest" or "pending".
</ParamField>

## Returns

<ResponseField name="result" type="string">
  The bytecode at the given address as a hexadecimal string. Returns "0x" for externally owned accounts.
</ResponseField>

<RequestExample>
  ```json Contract Address theme={null}
  {
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": [
      "0xa0b86a33e6776e1e627e5c82df4c0cf77b8bb0c9",
      "latest"
    ]
  }
  ```

  ```json EOA Address theme={null}
  {
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": [
      "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
      "latest"
    ]
  }
  ```
</RequestExample>

<ResponseExample>
  ```json Contract Response theme={null}
  {
    "id": 1,
    "jsonrpc": "2.0",
    "result": "0x608060405234801561001057600080fd5b50600436106100365760003560e01c..."
  }
  ```

  ```json EOA Response theme={null}
  {
    "id": 1,
    "jsonrpc": "2.0",
    "result": "0x"
  }
  ```
</ResponseExample>

## Error Handling

| Code   | Message                            | Description                                        |
| ------ | ---------------------------------- | -------------------------------------------------- |
| -32602 | Invalid address or block parameter | The provided address or block parameter is invalid |
| 4100   | Requested method not supported     | The method is not supported by the wallet          |

<Info>
  If the result is "0x", the address is an externally owned account (EOA). If it contains bytecode, it's a smart contract.
</Info>