> For the complete documentation index, see [llms.txt](https://paytr.gitbook.io/product-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://paytr.gitbook.io/product-docs/developers/developer-docs.md).

# Developer docs

For developers and projects looking to integrate the Paytr protocol.

### The Paytr smart contract

The heart and core of our project, our smart contract, handles everything.\
You can view the contract [here](https://github.com/paytr-protocol/contracts/tree/main/src) on Github.

Join our [Discord](https://discord.gg/Mg9DZ9yRgz) if you have any questions about integrating Paytr in your project, we'd love to talk!

### Deployments

<table><thead><tr><th width="167">Chain</th><th width="455">Address</th><th>Base Asset</th></tr></thead><tbody><tr><td>Sepolia</td><td><a href="https://sepolia.etherscan.io/address/0x0b92C9257B8AEcf84C8046eA2a591f1C9465571e">0x0b92C9257B8AEcf84C8046eA2a591f1C9465571e</a></td><td>USDC</td></tr><tr><td></td><td></td><td></td></tr></tbody></table>

In the next sections, we go over the 2 key functions of the contract and the helper functions.