zuCoffee

Background We're curious: why do crypto degens only buy and sell tokens in the market? Why not buy a coffee? Because no coffee support this: Crypto Coin buy Crypto Coffee. Let’s DO it! How to use it? Download a test version app, create your account. Get your test ERC20 token(Test USDT token) from faucet or our builders. A: you are the boss, create a item QR and show to me. B: I’m the customer, use the app scan your QR, (input the number and) check the payment number and verify my finger print, paid! A: You can check your balance in your app account, give me coffee and keep coins! Anyone can create any items to sell to anyone, that is all. B: Having a cup of coffee is so enjoyable!

We build it depends on ERC4337 and paymaster for gasless user experience. We create contract account for programming the ERC20 tokens to buy something. We use Push Protocol to notify boss to check the incoming tokens. We use your finger print or Face ID as passkey to register account and encrypt your transactions.