# Functions

<a id="subscribe"></a>

##  subscribe

▸ **subscribe**(self: *`MockState`*, type: *`string`*, method: *`string`*, params: *`Array`<`any`>*): `Promise`<`number`>

*Defined in [mock/subscribe.ts:7](https://github.com/polkadot-js/api/blob/290123b/packages/rpc-provider/src/mock/subscribe.ts#L7)*

**Parameters:**

| Param | Type |
| ------ | ------ |
| self | `MockState` |
| type | `string` |
| method | `string` |
| params | `Array`<`any`> |

**Returns:** `Promise`<`number`>

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