# Swapping

QSafe Wallet’s swap feature simplifies decentralized token exchanges across multiple blockchains. Here's a breakdown of how it works, using the screenshots attached as examples:

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**1. Swap Interface Overview**

The swap screen allows you to convert one cryptocurrency into another (e.g., **POL → USDC** on Polygon). Key components include:

* **Token Selection**:
  * **Input Token**: Select the token you want to spend (e.g., POL).
  * **Output Token**: Choose the token you want to receive (e.g., USDC).
* **Amount Input**:\
  Enter the quantity of the input token (e.g., `0.0001 POL`).
* **Network Selection**:\
  Specify the blockchain for the swap (e.g., Polygon).
* **Recipient Address**:\
  Optionally set a destination address for the received tokens.
* **Preview Button**:\
  Simulate the swap to view real-time rates, fees, and slippage.

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**2. How It Works Under the Hood**

1. **Price Aggregation**:\
   Q Safe Wallet queries decentralized exchanges (DEXs) and aggregators to find the **best possible rate** for your swap. For example, in the screenshot, swapping `0.0001 POL` yields `0.000021 USDC`.
2. **Gas Fee Estimation**:\
   The wallet calculates the **network fee** (gas) required to execute the transaction. 
3. **Slippage & Risk Management**:
   * **Slippage Tolerance**: The maximum acceptable price change during execution (default 0.5%).
   * **Minimum Received**: Ensures you get at least the specified amount even if prices fluctuate.
4. **Security Checks**:
   * Validates if you have enough funds to cover both the swap amount **and gas fees** .
   * Alerts you if funds are insufficient (as shown in the error message).

<figure><img src="/files/sxrvUBqAEd2a37lm7tmW" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/vFFMRXhlXVj8M9reLN3U" alt=""><figcaption></figcaption></figure>


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