Cashu.me v0.1: Modern Ecash Experience in Your Browser
Cashu.me is a Chaumian Ecash wallet for Bitcoin built as a progressive web app (PWA). It is free and open-source software released under the MIT license.
- "Today, we're excited to announce its first release and would like to thank all developers and users who have helped to build and improve this wallet," announced @callebtc.
"To get started, open Cashu.me in your browser and add it to your home screen to install the app. We recommend to use your device's native browser for the best experience."
NOTE: Ecash is a bearer asset which means that if you delete your browser data or lose access to your device without a proper backup (see below), you will lose your funds. Use this wallet only for small spending amounts.
Key features
- Modern UI. "The user interface features a modern and minimalistic look that gives you access to the main features of the wallet with just a few taps."
- Support for Bitcoin and USD. "Cashu.me uses the new v1 Cashu protocol which has support for multiple currencies – all backed by Bitcoin. You can send and receive Bitcoin or Fiat via Lightning invoices or directly as Ecash."
- Seed phrase backups. Ecash is a bearer asset and there is no server that holds your Ecash or makes transactions for you – the tokens are stored on your device. Cashu.me has support for seed phrase backups that allow you to restore your entire balance if you lose it.
- Animated QR codes. "Cashu.me now supports animated QR codes which not only feels like science fiction, it also allows you to send any amount you like via QR codes without ever hitting the internet."
- Send Ecash offline. "A new coin selection algorithm built into Cashu.me ensures you always have the right amount of Ecash in your wallet to be able to make up to 4 payments of any amount from your wallet without having to go online."
- Receive Ecash offline. "Simply press the "Later" button in your receive screen and store the Ecash in your History to redeem it later when you come back online."
- Lock Ecash with P2PK. "For cases where you don't want to trust your counterparty to double-spend the Ecash on you while you still remain offline, they can now lock Ecash to your public key by using the Pay-to-Pubkey (P2PK) feature. This locks their Ecash to the receiver's public key so that only you can ever spend it."
- Discover mints via Nostr. "The mint tab on the home screen now allows you to discover new mints via Nostr, a decentralized communication protocol."
- You can also browse for mints on bitcoinmints.com or on cashumints.space.
- Swap Ecash between mints. "If you ever want to transfer funds you hold from one mint to another, you can use the multi-mint swap feature in the Mint tab."
- Remote control with NWC. "You can now use your Cashu.me wallet from other applications using a feature called Nostr Wallet Connect (NWC)."
To learn more about Cashu, visit cashu.space, read our documentation, and follow @CashuBTC on X.
