The problem W3Kart solves

if user wants to use his funds to buy something he has to withdraw them and withdrawing tokens from centralised exchanges is not an easy task. we tried to make a tradeplace where a user can use his assests present in different token to buy what other sellers are selling, any seller wanting to sell something can sell and accept payments in whatever token he wants, his funds are stored in smart contract untill he withdraws them

Challenges we ran into

I was totally new to The Graph we used to track events in our dapp, and also never worked with api's first ,it took me time to learn these things .