CoinKeep

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:

1. Cross-Chain Payments: Using protocols like LiFi and Socket, CoinKeep lets businesses send/receive payments across different blockchains instantly.

2. Business Dashboard: A clean interface with sections like:

3 )Dashboard: Overview of balances, transactions, and analytics.

1. Payments: Send/receive single or multiple payments.

2. Batch Files: Upload files to process many payments at once (like salaries).

3. Billings: Generate invoices and keep records of client payments.

4. Developers: API keys and docs for integration into business systems.

5. Settings: Manage organization profile, email login, and security preferences.

6. Secure Login: Unlike wallets, businesses log in using email and organization name.

Why It’s Useful:

1. Businesses can manage all their blockchain payments in one place.

2. They don’t need technical knowledge of wallets or multiple blockchains.

3. 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.

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)