# Advanced Concepts ### Technical Features * **Permit2 Integration**: Token approvals are handled via signature using [Uniswap's Permit2](https://blog.uniswap.org/permit2-and-universal-router). This simplifies the user experience by eliminating separate approval transactions, while also reducing gas costs and improving security. * **ERC721 Loan NFTs**: Each loan is represented as a unique NFT containing all relevant loan data. These NFTs can include metadata for display in wallets and platforms, making them easier to track and manage. ### Governance * **ADMIN-Controlled Parameters:** The protocol is governed by a single ADMIN address, limited to adjusting only the SDEX fee and the minimum lending amount. This ensures controlled evolution while maintaining simplicity and security. * **Immutable Smart Contracts**: The core contracts are not upgradable, ensuring long-term security and trustlessness. Once deployed, the logic cannot be changed. * **No Emergency Pause**: There are no pause switches or backdoors — the protocol operates in a fully decentralized and unstoppable manner. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.smardex.io/p2p-lending/advanced-concepts.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.