# Crypto-Fiat Ramp

### Architecture

<figure><img src="https://511560137-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FBRX14z25wLMxFcY12pGf%2Fuploads%2Fg0kWGybDmJXeuARBOSJX%2FUntitled%20Diagram.drawio.png?alt=media&#x26;token=562a5e34-4532-47d8-841a-7ac73540aad3" alt=""><figcaption><p>Architecture diagram</p></figcaption></figure>

The crypto-fiat on/off ramp solution in the Polystream frontend uses three main components:

1. **Privy Authentication**: Handles user identity and wallet management
2. **Transak Integration**: Provides the fiat-to-crypto conversion services
3. **Native UI Integration**: Creates a seamless user experience within the app


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