FUNDX - Private Cross-Chain Funding

Demo video: https://youtu.be/OJ93iusWYdk

A privacy-focused application for seamlessly exchanging assets between shielded Solana accounts and major currencies across leading blockchain networks.

Overview

FUNDX enables users to:

• Deposit assets from any supported blockchain into shielded Solana accounts
• Withdraw from shielded accounts to any supported blockchain with single-transaction flows
• Swap between different assets while maintaining privacy
• Choose between Privacy Cash and ShadowWire privacy protocols

How It Works

Outbound (Withdraw): Swaps from shielded accounts are executed through a streamlined, single-transaction flow. SOL is withdrawn from the privacy pool and automatically swapped to the destination asset via NEAR Intents.

Inbound (Deposit): Funding shielded accounts involves a two-step process:

1. The originating asset is swapped into the user's unshielded Solana wallet balance
2. The funds are then deposited into the user's shielded balance

Supported Privacy Protocols

• ShadowWire - Privacy protocol by RADR Labs
• Privacy Cash - Alternative privacy protocol with signature-based authentication

Tech Stack

• Frontend: React 18, Material UI, Vite
• Blockchain: Solana Web3.js, Wallet Adapter
• Cross-chain: NEAR Intents API
• Build: TypeScript, pnpm monorepo

Project Structure

packages/
├── example-app/       # Main FUNDX React application
├── near-intents/      # NEAR Intents SDK integration
├── private-routers/   # Privacy router core implementations
└── signers/           # Wallet signer abstractions

Prerequisites

• Node.js >= 20
• pnpm >= 10.28.2

Installation

# Install dependencies
pnpm install

# Build all packages
pnpm build

Development

# Start development server
pnpm dev

# Run from example-app directory
cd packages/example-app
pnpm dev

Environment Variables

Create a .env file in the root directory:

VITE_SOLANA_RPC_URL=https://api.mainnet-beta.solana.com

Building for Production

pnpm build

Deployment

The app is configured for Heroku deployment:

git push heroku main

Scripts

Command	Description
pnpm dev	Start development server
pnpm build	Build all packages
pnpm test	Run tests
pnpm lint	Lint code
pnpm format	Format code with Prettier
pnpm typecheck	Type check with TypeScript

Security Notice

This application is a prototype for testing purposes. Use with test funds only. Never enter real mnemonics or use significant funds in this prototype.

License

MIT