I’ve been considering integrating Cashu or Fedimint to support <1000 sat payments in StashPay. But where I get stuck is that it would probably require displaying two balances. Not only do Liquid and Ecash have different trust/auditability properties. I’m not sure there is a good solution to managing dust amounts in both an ecash mint and a Liquid wallet. The resulting UX would likely be worse.

A solution to integrate all of these into a single mobile app might be to integration each into a bluewallet card. Then allow users to do zaps with their ecash wallet that connects to a lightning address. Medium sized lightning payments (over 10k sats) could be done from their Liquid wallet to save on fees. Then an on-chain wallet could be used for savings. Blue already has many great options like multi-sig. All these wallets could be connected internally via submarine swaps to manage balances in each. nostr:note1jact4xksh8mkqvgj8ke7yu2l0wm43y3k2m7fux53hs5hhgc29rms7e7tfv