The problem Decentralized Scan-and-Pay System solves

1. Customers can enjoy a seamless shopping experience without waiting in long checkout lines or dealing with cumbersome payment methods.
2. Enable retailers and online merchants to accept cryptocurrency payments seamlessly.
3. When a customer decides to make a purchase, they simply scan the vendor's QR code using the app. The app retrieves the transaction details, including the vendor's wallet address and the payment amount, and prompts the customer to confirm the transaction.
4. Retailers can reduce transaction costs associated with traditional payment methods, such as credit card processing fees and chargeback costs.
5. It will increase crypto adoption in daily life, scan the merchant QR code and pay through your wallet or vice versa.

Challenges we ran into

Develop a user-friendly web and mobile application that serves as the interface for users to scan QR codes and Make payments from their crypto wallet using a decentralized platform after payment sound will buzz.
but Challenges are: -

1. when the user connects to their wallet then their public address will generate a QR code, this is the one challenge for me to create.
2. when user sign in to our page then they try to scan the other user's generated QR code and redirect to the payment page where the user can send money.
3. after scanning the QR code redirected to the payment page is a challenge.
4. Users can all transactions whatever they did.
5. after payment sound buzz.
6. and also after payment user will get payment message on their phone.