CryptoLink

Inspiration

What it does

CryptoLink allows users to buy products using usdt ( blockchain eccomerce app )

How we built it

we used truffle to deploy contracts to ganache's local development blockchain , there is backend , a little bit of frontend and of course 2 smart contracts i also created "mock/fake" smart contract for usdt, the way it works : first we are getting payid from backend, then we are creating "payment" in mongodb collection ,where we store id of item bought, payid , and isPaid, so then we are paying with usdt and smart contract emits event, backend side is constantly listening for event, and when it gots one it takes payid from event and in database changes isPaid value to true then user is requesting to another endpoint with payid and backend checks if isPaid is true then returns value.