The State of Ecash Design
summary
Cashu is presented as an eCash protocol with over 29 live projects and wallets, using Chaum-style blind signatures and a mint model; wallets integrate a decentralized directory called Bitcoin Mints and a mint auditor that shows uptime, melt success rates and lightning melt graphs. An engineering feature called multi-nut payments lets one invoice be paid from multiple mints without manual swaps. A functioning Cashu wallet is prototyped inside a BitChat fork in 72 hours using Figma, Cursor MCP Bridge and Kotlin/Android Studio.
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chapters (8)
- 0:00Cashu and eCash design intro
- 4:08Cashu wallet design challenges
- 7:42Mint auditing for custodial risks
- 11:56Simplifying mint swaps
- 14:24Multi-nut payments feature
- 17:49Payment UX design upstream
- 20:14AI-assisted Cashu wallet design
- 23:51Q&A on mint reviews
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