ZeKshop addresses the severe privacy issues in purchasing erotic merchandise by using Aztec, a privacy-first Layer 2 on Ethereum. ZeKshop is a privacy-centric adult store using cryptography to protect user anonymity. Purchases are secured via Aztec Layer 2 with zero-knowledge proofs, while zkEmail library enables private, verified reviews and communication with the store. Loyal customers can earn on-chain NFT vouchers for free products, ensuring both privacy and rewards. The purchases are being privately collected with the parcel-receiving machines BoxNow. This document outlines the key features of ZeKshop, including private payment methods, order receipt through BoxNow, secure communication and privately sharing opinion on product using zkemail.
The verify_purchase circuit
It get the purchase number, the sender and recipient email addresses from certain email's metadata and constraints that indeed the user(on the client-side) that inputs the email is the one that received the email better known as "spender of the funds for the purchase".