BaseSplit

Split expenses and request payments on Base blockchain using Smart Wallets and USDC.

Features

• Smart Wallet Integration - Sign in with email/social via Coinbase Embedded Wallets or connect external wallets
• Dual Wallet Support - Use Smart Account or EOA wallet with easy switching
• USDC Payments - Request and send payments in USDC on Base Mainnet
• Contact Management - Save frequently used addresses with labels
• Payment Requests - Create, track, and pay pending requests
• PWA Support - Install as a mobile app with offline capabilities
• Responsive Design - Desktop header navigation, mobile bottom navigation

Quick Start

npm install
npm run dev

Open http://localhost:3000 in your browser.

Environment Variables

Create a .env.local file with:

NEXT_PUBLIC_ONCHAINKIT_API_KEY=your_onchainkit_api_key
NEXT_PUBLIC_SUPABASE_URL=your_supabase_project_url
NEXT_PUBLIC_SUPABASE_ANON_KEY=your_supabase_anon_key
NEXT_PUBLIC_CDP_PROJECT_ID=your_cdp_project_id

Getting API Keys

• OnchainKit API Key: Get from Coinbase Developer Portal
• CDP Project ID: Get from Coinbase Developer Portal
• Supabase URL & Anon Key: Get from your Supabase Project Settings

Tech Stack

• Next.js 14 (App Router, TypeScript)
• OnchainKit + wagmi + viem for wallet integration
• CDP Embedded Wallets for social/email login with Smart Accounts
• Supabase for authentication and database
• Tailwind CSS for styling

Database Schema

Profiles

Stores user wallet addresses linked to Supabase auth.

Contacts

User-managed address book with labels and notes.

Payment Requests

Tracks payment requests with status (pending/paid/cancelled/expired).

Roadmap

See GitHub Issues for planned features.

License

MIT