> For the complete documentation index, see [llms.txt](https://docs.railgun.org/developer-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.railgun.org/developer-guide/engine-1/wallets.md).

# Wallets

You will need to use a RAILGUN wallet to synchronize state and access data for your application. You can use the [Wallet](/developer-guide/engine-1/wallets.md) and [Engine](https://docs.railgun.org/developer-guide/engine/engine-overview) SDKs for this purpose.