# Smart Contract Design The smart contract layer is composed of the following key modules: * **SignalSubscription.sol:** Manages user subscriptions to AI trading signals, enforcing access control and subscription periods. * **TradeRouter.sol:** Routes trade orders to supported DEX aggregators, optimizing for lowest slippage and fees. * **PortfolioManager.sol:** Tracks user asset holdings, updates positions upon execution events, and calculates real-time P\&L. * **Governance.sol:** Enables decentralized parameter updates (e.g., signal fees, supported assets) via token-holder voting. --- # 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://vantix-ai-docs.gitbook.io/vantix-ai/architecture-and-design/smart-contract-design.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.