# XRP Ledger resources

- [XRP Ledger Concepts](https://help.xaman.app/app/xrp-ledger-resources/xrp-ledger-concepts.md)
- [Video: Reserves and Fees on the XRPL](https://help.xaman.app/app/xrp-ledger-resources/xrp-ledger-concepts/reserves-and-fees-on-the-xrpl.md): Reserves and fees on the XRPL - Video 4 of 5
- [About Reserves](https://help.xaman.app/app/xrp-ledger-resources/xrp-ledger-concepts/about-reserves.md): Understanding reserves on the XRP Ledger
- [Payment Channels](https://help.xaman.app/app/xrp-ledger-resources/xrp-ledger-concepts/payment-channels.md): Understanding Payment Channels on the XRPL: A Simple Guide
- [Multi Signature](https://help.xaman.app/app/xrp-ledger-resources/xrp-ledger-concepts/multi-signature.md): Understanding XRPL MultiSignature
- [Understanding fiat currencies](https://help.xaman.app/app/xrp-ledger-resources/xrp-ledger-concepts/understanding-fiat-currencies.md): What is fiat?


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