# Function: subscriptionKey()

```ts
function subscriptionKey(seed, provider?): Promise<SubscriptionKey>;
```

Defined in: [packages/core/src/session/hosting.ts:65](https://github.com/leifriksheim/minca/blob/main/core/src/session/hosting.ts#L65)

The subscription key a seed stands for

## Parameters

| Parameter | Type |
| ------ | ------ |
| `seed` | `Uint8Array` |
| `provider?` | [`CryptoProvider`](https://minca.dev/api/core/interfaces/CryptoProvider.md) |

## Returns

`Promise`\<[`SubscriptionKey`](https://minca.dev/api/core/interfaces/SubscriptionKey.md)\>