# Add Fees To Swap

Enable any Aquarius integrator to easily take a configurable commission on each swap—without mixing classic Stellar payments and Soroban calls in one transaction.

### **Core Features**

* **Configurable Fee Fraction:** Specify maximum fee allowed by contract (e.g. 2 %) and then specify any the fee amount for each swap for maximum flexibility.
* **Fee Destination:** Route collected fees into a single “fee destination” address of your choice.
* **Uniform Denomination:** Allow swap fees on claim into one target asset (e.g. XLM, USDC, AQUA), so you aren’t left holding a basket of tokens.
* **Out‑of‑the‑Box Wrapper:** A standalone Soroban contract sits atop our Aquarius AMM Router. Call it instead of directly calling the router, and it handles fee deduction and forwarding for you.
* **Secure & Flexible:** Operators can claim raw fees or immediately swap them via predefined routes.

### **Setup Instructions**

**1. Deploy a Fee Collector Smart Contract**

To begin collecting swap fees, deploy your custom fee collector smart contract. This contract stores core parameters such as:

* Fee destination address
* Maximum allowed fee
* Operator address (authorized to claim fees)

**2. Execute Swaps Using the Fee Collector**

Once deployed, the fee collector smart contract allows you to execute swaps similarly to regular Aquarius swaps, with the added capability to specify and collect fees.

**3. Claim Collected Fees**

At any time, the designated operator can invoke the claim method on the smart contract to transfer accumulated fees to the specified destination address.<br>

Continue reading below for more detailed explanations of each step.<br>