# getProvider()

Returns a chain provider for the selected chain.

**Info**

Each provider instance is created once per network, thus 2 chain providers from the same network on the same page share the same underlying reference.

**Type**

`getProvider(chain): ChainProvider`

**Parameters**

| Name  | Type                              | Description |
| ----- | --------------------------------- | ----------- |
| chain | `"constellation"` \| `"ethereum"` | Chain name. |

**Return Type**

`ChainProvider` - The selected chain provider. An error is thrown if `chain` is invalid.

**Example**

TypeScript

```
window.stargazer.getProvider("constellation");
// ChainProvider
```