Eliptic Curve Digital Signature

A simulated Web3 wallet app that uses ECDSA cryptographic signatures for secure transactions between addresses. Built with React, TailwindCSS, and a custom backend powered by Express and LowDB.

ECDSA-Wallet allows users to generate wallets (public/private key pairs), view balances, and send signed transactions to other wallets using elliptic curve cryptography. All data is persisted on the backend using a simple JSON-based database (LowDB), simulating real-world blockchain mechanics without needing an actual blockchain.

Features:

• Generate public/private key pairs using ECDSA (secp256k1)
• Persist wallets in browser's localStorage
• Check balance of any address
• Sign and verify transactions using private key (never exposed)
• Prevent transfers to self or with invalid signatures
• View transaction history (stored via LowDB)
• Delete wallets and update UI in real-time
• Stylish interface built with Tailwind CSS

What you’ll learn:

• Asymmetric cryptography using ECDSA
• Message signing & verification
• Secure transaction flow with hash validation
• Designing a full-stack dApp architecture
• Persisting data using LowDB as a lightweight backend

Perfect for newcomers who want to understand Web3 without diving straight into Solidity or deploying smart contracts.