The problem Stable Payment Protocol solves

Paying for a product w/ Stablecoin in Web3 World has been very hard.
Since smart contracts have to interact with Stablecoin. contracts and using allowance, it always exposes users to harmful attacks, such as wallet draining.

Stable Payment Protocol helps payment needed people like shopping mall websites, to easily integrate stable coin payment.
It is so simple and also good, since it never requires the user to allow anything.

By making it enable to pay for the product in Web2 way and not making user to increase allowance from anything,
users can enjoy safe payment.

Challenges I ran into

it was hard to mimic the web2 payment process