PayPulse

PayPulse is a groundbreaking decentralized payroll and invoicing platform built for ETHGlobal New Delhi 2025 that fundamentally transforms how businesses compensate their workforce. Instead of traditional monthly paychecks, PayPulse enables employees to get paid every second they work through continuous salary streaming powered by PYUSD (PayPal's USD-pegged stablecoin) and Superfluid Protocol. A $6,000 monthly salary becomes a real-time stream of approximately 2.3 PYUSD per hour, flowing 24/7 directly into employees' wallets, giving them immediate access to their earned wages. The platform features a comprehensive dual payment system supporting both streaming payments for ongoing salaries and instant settlements for bonuses, contractor payments, and project completions. Built with a modern Next.js frontend integrated with Privy for wallet authentication and a Node.js backend with MongoDB, PayPulse provides a complete enterprise-grade solution including automated invoice generation, ENS domain resolution for human-readable addresses, real-time analytics dashboards, and beautiful flow visualizations that show money moving in real-time. The system leverages PYUSD's regulatory compliance and PayPal integration to bridge traditional finance with blockchain innovation, making it accessible to mainstream businesses while providing the transparency and efficiency of on-chain payments. PayPulse addresses critical pain points in modern workforce management by enabling global instant payments without banking delays, improving employee cash flow by eliminating the wait for payday, and providing complete transparency through on-chain transaction records. The platform is particularly valuable for startups paying remote developers, DAOs compensating contributors, freelance platforms processing per-task payments, and any business looking to offer competitive benefits through immediate wage access. With features like automated PDF invoice generation, comprehensive recipient management, Self.xyz QR code integration for identity verification, and a production-ready interface that works seamlessly across all devices, PayPulse represents a complete paradigm shift toward real-time.

PayPulse is architected as a full-stack decentralized application using Next.js 13 with TypeScript for the frontend, providing server-side rendering and optimal performance, while the backend runs on Node.js with Express and MongoDB for data persistence. The blockchain integration centers around Superfluid Protocol's SDK, which enables the core streaming payment functionality through Constant Flow Agreements (CFA), allowing us to create, modify, and delete payment streams programmatically using ethers.js for Web3 interactions. We integrated Privy for seamless wallet authentication and user management, which significantly simplified the onboarding process by handling wallet connections, user sessions, and multi-wallet support without requiring users to manage complex seed phrases or private keys. The payment system operates on two levels: instant transfers using Superfluid's transfer operations for one-time payments, and continuous streams using the CFA (Constant Flow Agreement) system where we calculate flow rates in wei per second and manage buffer amounts to ensure streams don't fail due to insufficient funds.The PYUSD integration required wrapping native PYUSD tokens into PYUSDx Super Tokens through Superfluid's token wrapper, creating a seamless bridge between PayPal's stablecoin ecosystem and DeFi streaming capabilities. One particularly innovative aspect was implementing real-time balance updates using React Query with custom invalidation strategies, combined with ethers.js event listeners to provide instant UI feedback when transactions are confirmed on-chain. We created a sophisticated recipient management system with ENS resolution capabilities, allowing users to send payments to human-readable domain names instead of hex addresses, and integrated Self.xyz for QR code-based identity verification and payment requests. The invoice system automatically generates professional PDF documents. We also implemented a custom buffer calculation system that queries Superfluid's CFAv1Forwarder contract to determine the exact amount of tokens needed to maintain streams, preventing failures due to insufficient balances and providing users with clear funding requirements before initiating payments.