# Supported Blockchains

{% content-ref url="/pages/D3U6jRB6rMXGIyVyTo09" %}
[Chains](/picket-docs/reference/api-reference/chains.md)
{% endcontent-ref %}

Picket uses a slug to identify all supported blockchains. The supported chains are 

* `ethereum` (Mainnet)
* `polygon` (Mainnet)
* `optimism` (Mainnet)
* `arbitrum` (Arbitrum One)
* `avalanche` (Avalanche C-Chain)
* `solana` (Mainnet Beta)
* `solana-testnet` (Solana Testnet)
* `solana-devnet` (Solana Devnet)

Requests default to using `ethereum`. For all other chains, pass the `chain` parameter into the login request. When the `solana` chain is passed,  login will prompt  the user to sign into their Phantom wallet. 

{% tabs %}
{% tab title="Javascript" %}

```javascript
// Login with Solana
await picket.login({ chain: "solana" });

// Login with Ethereum
await picket.login({ chain: "ethereum" });

// Login with Polygon
await picket.login({ chain: "polygon" });

// Login with Optimism
await picket.login({ chain: "optimism" });

// Login with Arbitrum
await picket.login({ chain: "arbitrum" });

// Login with Avalanche C-Chain
await picket.login({ chain: "avalanche" });

// defaults to Ethereum
await picket.login();
```

{% endtab %}
{% endtabs %}

Pending demand, we plan to support more chains soon and will update this section as we do. Have a chain you'd like supported soon? Let us know via email at <team@picketapi.com> and we'll prioritize it accordingly.


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