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

# FAQ

1. **Who pays for the network fees?**

   User pays Solana network fees on deposit. For withdrawals, relayers pay Solana network fees.\
   \
   After you integrate with the SDK, you don't need to pay any fees.
2. **What's the minimum withdrawal amount?**

   Check minimum\_withdrawal field in [https://api3.privacycash.org/config](https://api3.privacycash.org/config)
3. **Is there any devnet support?**

   Not for now. Please test on mainnet. It should be really straightforward to integrate.
4. **For frontend integration, does client/user ever need to pass private key or encryption key to relayer?**

   No. Those keys belong to the user, and should never leave client.
5. **Can SDK integration devs sponsor the gas fee?**

   Currently not.
6. **Can SDK integration devs charge fees?**

   You can add a fee transfers instruction on deposit and charge some fees from your users. In fact, a handful of projects integrated our SDK already did so.