CoinKeep

Problem Statement

CoinKeep is a business-focused cross-chain payments dashboard. Think of it like PayPal, but built for blockchain. It helps companies send, receive, and manage payments across different blockchains from one easy-to-use dashboard.The Problem:Right now, businesses face three big challenges with blockchain payments:1)Too many blockchains: Payments are locked on Ethereum, Polygon, Avalanche, etc. It’s hard to move money across them.2)Complex tools: Existing solutions are often made for developers or crypto experts, not businesses.3)No business features: Wallets like MetaMask are great for individuals, but companies need dashboards, billing systems, and batch payments.Our Solution CoinKeep solves these issues by:Cross-Chain Payments: Using protocols like LiFi and Socket, CoinKeep lets businesses send/receive payments across different blockchains instantly.Business Dashboard: A clean interface with sections like:3 )Dashboard: Overview of balances, transactions, and analytics.Payments: Send/receive single or multiple payments.Batch Files: Upload files to process many payments at once (like salaries).Billings: Generate invoices and keep records of client payments.Developers: API keys and docs for integration into business systems.Settings: Manage organization profile, email login, and security preferences.Secure Login: Unlike wallets, businesses log in using email and organization name.Why It’s Useful:Businesses can manage all their blockchain payments in one place.They don’t need technical knowledge of wallets or multiple blockchains.It makes crypto payments faster, cheaper, and easier to scale.Future Vision:In the future, CoinKeep can integrate AI-powered agents for smart payment handling and expand to support stablecoins like PayPal USD, enabling real-world adoption at scale.

Solution

CoinKeep is engineered as a pragmatic, security-conscious prototype that proves out multi-mode authentication and session introspection while laying the groundwork for deeper blockchain-enabled operations. The codebase emphasizes clarity over framework heaviness, making it easy to evolve into a production stack with minimal rewrites.Technologies used: Smart Contract / Web3 Tooling Foundry (forge) for Solidity development/testing Solidity forge-std (testing utilities, cheatcodes) solady (gas-efficient primitives scaffolded for future use)Backend Node.js + Express better-sqlite3 (embedded relational persistence) jsonwebtoken (JWT issuance & verification) zod (runtime request validation) helmet (security headers)Frontend React 18 (Create React App) Plain CSS (custom dashboard layout + components) Ethers.js (wallet provider + message signing) SIWE (Sign-In With Ethereum message formatting & validation)