Developer Documentation

Technical documentation for developers who want to understand, contribute to, or integrate with PolyPay.

Contents

This section covers:

• Getting Started - Prerequisites, setup, and running the project locally

• Database Connection Guide - How to connect and query the PostgreSQL database

• Circuit Code Walkthrough - Detailed explanation of the Noir ZK circuit

Tech Stack

Component	Technology
Frontend	Next.js + wagmi
Backend	NestJS + Prisma
Smart Contract	Solidity + Hardhat
ZK Circuit	Noir
Proof Verification	zkVerify
Database	PostgreSQL

Quick Links

• GitHub Repository

• Smart Contract on Horizen testnet