> ## Documentation Index
> Fetch the complete documentation index at: https://developers.particle.network/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

* **Ethereum** — Chain ID: **1**
* **BNB Chain** — Chain ID: **56**
* **X Layer** — Chain ID: **196**
* **Base** — Chain ID: **8453**
* **Arbitrum** — Chain ID: **42161**

### Non-EVM Chains

* **Solana** — Chain ID: **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**
  * **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**.
* Automatically handle gas payments by using any available Primary Asset, even if that asset is on another chain or the gas token is a completely different token.

### Availability by Chain

Some **Primary Assets** are only available on specific chains, depending on native sources.

* **Solana** — Available Assets: **USDC, USDT, SOL**
* **Ethereum** — Available Assets: **USDC, USDT, ETH**
* **Base** — Available Assets: **USDC, ETH**
* **Arbitrum** — Available Assets: **USDC, USDT, ETH**
* **BNB Chain** — Available Assets: **USDC, USDT, ETH, BNB**