> ## Documentation Index
> Fetch the complete documentation index at: https://uasdev.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Chains and Primary Assets Supported by Universal Accounts

> A list of the blockchains and Primary Assets supported by Universal Accounts.

**Universal Accounts** support a wide range of networks, enabling users to interact across them with a **single account** and a **unified balance**.

## Supported Networks

### EVM-Compatible Chains

| Chain Name | Network ID |
| ---------- | ---------- |
| Ethereum   | 1          |
| BNB Chain  | 56         |
| Base       | 8453       |
| Arbitrum   | 42161      |
| Avalanche  | 43114      |
| OP         | 10         |
| Polygon    | 137        |
| HyperEVM   | 999        |
| Berachain  | 80094      |
| Linea      | 59144      |
| Sonic      | 146        |
| Merlin     | 4200       |

### Non-EVM Chains

| Chain Name | Network ID |
| ---------- | ---------- |
| Solana     | 101        |

<Note>
  This list is regularly updated as support for new chains is added. All supported chains can be accessed through a single Universal Account—no separate wallets or setups required.
</Note>

## Primary Assets

**Primary Assets** are a set of key tokens with deep liquidity **that can be used for cross-chain transactions, including gas payments**. When engaging in a cross-chain operation, they're automatically selected and used by the SDK on a per-transaction basis.

<Note>
  Currently, the list of Primary Assets includes:

  * **ETH**
  * **USDT**
  * **USDC**
  * **BTC**
  * **SOL**
  * **BNB**
</Note>

When a user sends a transaction (e.g. swapping a token), the SDK will:

* Identify the optimal Primary Asset from the user’s portfolio. For example, it may select USDC on Polygon to allow a user to purchase a memecoin on Solana.
* Route liquidity across all the chains the user holds this Primary Asset using Universal Liquidity.
* Complete the transaction on the destination chain, even if the user holds **no assets on that chain**.