> For the complete documentation index, see [llms.txt](/llms.txt).

# `zks_getBytecodeByHash`

Returns the bytecode of a transaction for the provided hash.

## Parameters[​](#parameters "Direct link to Parameters")

- `hash`: (string) [_Required_] The hash of the transaction.

## Response[​](#response "Direct link to Response")

The byte code of the given transaction.

## Example[​](#example "Direct link to Example")

Replace `<YOUR-API-KEY>` with an API key from your [Infura dashboard](https://app.infura.io/).

### Request[​](#request "Direct link to Request")

- curl
- WSS

```
curl https://zksync-mainnet.infura.io/v3/<YOUR-API-KEY> \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc": "2.0", "id": 1, "method": "zks_getBytecodeByHash", "params": ["0x0100067d861e2f5717a12c3e869cfb657793b86bbb0caa05cc1421f16c5217bc"]}'

```

```
wscat -c wss://zksync-mainnet.infura.io/ws/v3/<YOUR-API-KEY> -x '{"jsonrpc": "2.0", "id": 1, "method": "zks_getBytecodeByHash", "params": ["0x0100067d861e2f5717a12c3e869cfb657793b86bbb0caa05cc1421f16c5217bc"]}'

```

### Response[​](#response-1 "Direct link to Response")

- JSON

```
{
  "jsonrpc": "2.0",
  "result": [
    0,
    4,
    0,
    0,
    0,
    0,
    0,
    2,
    0,
    11,
    ...,
    ...
  ],
  "id": 1
}

```