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

# `starknet_addDeclareTransaction`

Submits a new class declaration transaction.

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

`declare_transaction`: [_Required_] A [declare transaction](https://docs.starknet.io/documentation/architecture%5Fand%5Fconcepts/Network%5FArchitecture/transactions/#declare-transaction)object to declare a new class on Starknet.

## Returns[​](#returns "Direct link to Returns")

The result of the transaction submission, including:

- `transaction_hash`: The hash of the declare transaction.
- `class_hash`: The hash of the declared class.

## 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

```
curl https://starknet-mainnet.infura.io/v3/<YOUR-API-KEY> \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "starknet_addDeclareTransaction",
    "params": {
      "declare_transaction": {
        "type": "DECLARE",
        "sender_address": "0x13e3ca9a377084c37dc7eacbd1d9f8c3e3733935bcbad887c32a0e213cd6fe0",
        "max_fee": "0x28ed6103d0000",
        "version": "0x3",
        "signature": [
          "0x42527ffe9912b338983cbed67e139cfcc26a4d8cf1d1c2a85e4125fdf5f59ed", "0x636147d06fefd02ed37984b752556d4b9aefdac1a50b3df0528ec7c201ad84b"
        ],
        "nonce": "0x17",
        "contract_class": {
          "sierra_program": [
            "0x1",
            "0x3",
            "0x0",
            "0x361",
            "0x800000000000000700000000000000000000000000000000",
            "0x537472756374"
          ]
          "entry_points_by_type": {
            "CONSTRUCTOR": [
              {
                "function_idx": 14,
                "selector": "0x28ffe4ff0f226a9107253e17a904099aa4f63a02a5621de0576e5aa71bc5194"
              }
            ],
            "EXTERNAL": [
              {
                "function_idx": 11,
                "selector": "0x14dfa38c36b389189b8be0b1d3f9434ffcca49bf1a88f3658579d23d16368f"
              },
              {
                "function_idx": 10,
                "selector": "0x1fd12fd4580400368d8953eca1bf472ee233e7e06245d1ef8c176ff12bd3c4"
              }
            ],
            "L1_HANDLER": []
          }
        }
      }
    },
    "id": 0
  }'

```

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

- JSON

```
{
  "jsonrpc": "2.0",
  "result": {
    "transaction_hash": "0x121aaba2894a63cce81acabb559eb2c114f4859dc5803e0b91349ec398d2eb0",
    "class_hash": "0x515dd668a1798214e7ca9ec90c52e267229b8104fb296a90f20b6f70baaef53"
  },
  "id": 0
}

```