# Welcome to LEH LEH provides a single venue to lend, borrow, swap, and leverage-trade crypto assets through a powerful risk engine. * Earn interest on deposits * Cross-Margin / Cross-Collateralised * Decentralized / Non-Custodial LEH is built on the Solana blockchain and utilizes Openbook DEX for spot margin trading while perpetual futures are traded on LEH's own order book. LEH is governed by LEH token holders via the [LEH DAO](https://x.com/lehmanbroscoin). LEH will be completely open source, we see this transparency as vital for the project as it increases the amount of people who understand and can improve the project. The DAO frequently sponsors grants for developers to extend, integrate with or try to break the project. Present your idea on the governance forum if you would like to receive financial support. There are a number of ways to connect your trading system to the LEH's on-chain program. The easiest way for traders who are used to centralized exchanges, is to use the REST & WebSocket API that was purposefully designed to be easy to integrate. If you want to have the highest level of control, you will most likely want to communicate directly with the blockchain using one of the existing open source wrappers for TypeScript, Python or .NET. If you are looking to get an overview of current & running efforts, we recommend that you join our [telegram](https://t.me/lehmanbroscoin). --- # 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://leh.gitbook.io/leh/welcome-to-leh.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.