# FAQ

**1. What is FEX?**

It's a decentralized exchange (DEX) that allows users to trade tokens without the need for a third party. FEX is the abbreviation for "**F**air **EX**change". We want to bring fairness to all the traders.

**2. Is FEX custodial or non-custodial?**

It is a non-custodial exchange, which means that users retain full control of their assets at all times. The trading process is managed by smart contracts, which are self-executing contracts that are stored on the blockchain. This ensures that all transactions are transparent and secure.

**3. What can we do with it?**

With FEX, you can trade a variety of tokens, including CRC20 tokens and BCH. You can make and take bulk orders for fungible tokens. In the future, FEX will also support partial deals and non-fungible tokens.FEX also supports UniswapV2-style automated market maker functions. You can swap with the AMM pool.

**4. Which tokens can we exchange?**

Currently, you can exchange CRC20 tokens and BCH on FEX. In the future, FEX will also support BCMR tokens.

**5. What is the fee rate?**

There is no fee for bulk orders that are less than 0.1 BCH. FEX charges a fee of 0.6% for the other transactions.

**6. Which wallet does FEX use?**

It uses [Pay4Best](https://pay4.best/), which extends the function of Web3 wallets (such as MetaMask) such that you can sign BCH transactions with them.

**7. Where is the smart contracts' source code?**

The source code for FEX's smart contracts is currently not available to the public. However, it will be made available after it has been audited by a third party. If you are a cashscript expert and willing to help us audit the code, please contact us.