# Wert Documentation

## Guides
- [Customisation Package](https://docs.wert.io/docs/customisation-package.md)
- [User's data prefill](https://docs.wert.io/docs/data-prefill.md)
- [Multiple addresses](https://docs.wert.io/docs/extra-object-fiat-onramp.md)
- [Fiat Onramp](https://docs.wert.io/docs/fiat-onramp.md)
- [Limiting assets on the widget](https://docs.wert.io/docs/limiting-assets-in-the-widget.md)
- [Listeners object](https://docs.wert.io/docs/listerners-object.md)
- [Adding item information](https://docs.wert.io/docs/extra-object-item-checkout.md)
- [Generate signed data](https://docs.wert.io/docs/generate-signed-data.md)
- [NFT Checkout](https://docs.wert.io/docs/nft-checkout.md)
- [Limiting fiat currencies](https://docs.wert.io/docs/limiting-fiat-currencies.md)
- [Simplifying the UI](https://docs.wert.io/docs/simplifying-the-ui.md)
- [Widget display methods](https://docs.wert.io/docs/widget-display-methods.md)
- [Forming input data](https://docs.wert.io/docs/forming-input-data.md)
- [Keypair creation](https://docs.wert.io/docs/generating-a-keypair.md)
- [Passing Apple Store Review](https://docs.wert.io/docs/passing-apple-store-review.md)
- [Signing a payment request](https://docs.wert.io/docs/signing-a-payment-request.md)
- [Token Support](https://docs.wert.io/docs/token-support.md)
- [Verifying your smart contract](https://docs.wert.io/docs/verifying-your-smart-contract.md)
- [Integration steps](https://docs.wert.io/docs/integration-steps.md)
- [Introduction](https://docs.wert.io/docs/introduction.md)
- [Service availability](https://docs.wert.io/docs/service-availability.md)
- [Supported coins and blockchains](https://docs.wert.io/docs/supported-coins-and-blockchains.md)
- [Converter](https://docs.wert.io/docs/converter.md)
- [Data API](https://docs.wert.io/docs/data-api.md)
- [Error codes](https://docs.wert.io/docs/error-codes.md)
- [Using LLMs](https://docs.wert.io/docs/using-llm.md)
- [Webhooks](https://docs.wert.io/docs/webhooks.md)
- [General FAQ](https://docs.wert.io/docs/general-faq.md): Do you have further questions? Below you'll find answers to the most frequently asked questions we receive about Wert.
- [Smart contract FAQ](https://docs.wert.io/docs/smart-contract-faq.md): Questions about smart contracts? Below you'll find answers to some of the question usually asked about by other partners.
- [Going live!](https://docs.wert.io/docs/going-live.md)
- [Sandbox](https://docs.wert.io/docs/sandbox.md): Sandbox simulates the production environment by sending requests to the sandbox module for test purchases and smart contract interactions. It is connected to testnet blockchains, so it **does not** make real charges and **does not** use real coins. We also **do not** send OTP to your phone, code is always **0000**