Send USDC home in seconds. Sub-second finality. 0.3% fee. 15+ chains.

ArcRemit is a decentralized cross-border remittance application built on ARC Network - Circle's purpose-built Layer-1 blockchain for real-time finance. It enables instant, low-cost USDC transfers globally using ARC's sub-second finality and native USDC gas.

• Global remittance fees average 6.5% (World Bank 2024)
• Traditional transfers take 1-3 business days
• Hidden FX markups eat into recipient amounts
• Vietnam alone receives $18B+/year in remittances

ArcRemit leverages ARC's unique properties:

• Sub-second settlement: Money arrives in <1 second
• USDC as gas: Predictable fees in USD terms
• 0.3% platform fee: 20x cheaper than traditional
• Opt-in privacy: Hide amounts or addresses
• Multi-chain: Bridge from any Circle-supported chain

┌─────────────────┐     ┌──────────────────┐     ┌─────────────────┐
│   Frontend      │────▶│  ArcRemit.sol    │────▶│   USDC Token    │
│   (Next.js)     │     │  (Escrow)        │     │   (ERC-20)      │
│                 │     │                  │     │                 │
│  - wagmi/viem   │     │  - createRemit() │     │  - On ARC L1    │
│  - RainbowKit   │     │  - claimRemit()  │     │  - 6 decimals   │
│  - TailwindCSS  │     │  - refundRemit() │     │                 │
└─────────────────┘     └──────────────────┘     └─────────────────┘

ArcRemit.sol - USDC escrow contract with:

• Escrow-based remittance (sender locks, receiver claims)
• Configurable fees (0.3% default, max 1%)
• Expiry mechanism (up to 30 days, auto-refund)
• ReentrancyGuard + SafeERC20 protection
• Event logging for all operations

Next.js 14 app with:

• Dark glassmorphism design
• Vietnamese/English language toggle
• QR code for receiving payments
• Real-time fee calculation
• Transaction history dashboard
• Mobile-first responsive design

• Node.js 18+
• npm or yarn
• A wallet with USDC on ARC testnet

# Install dependencies
npm install

# Copy environment file
cp .env.example .env
# Fill in ARC_TESTNET_PRIVATE_KEY and USDC_ADDRESS

# Compile contracts
npx hardhat compile

# Run tests
npx hardhat test

# Deploy to ARC testnet
npx hardhat run scripts/deploy.ts --network arcTestnet

cd frontend

# Install dependencies
npm install

# Copy environment file
cp .env.example .env.local
# Fill in NEXT_PUBLIC_ARCREMIT_ADDRESS from deploy output

# Start development server
npm run dev

Open http://localhost:3000.

• Smart Contracts: Solidity 0.8.20, OpenZeppelin, Hardhat
• Frontend: Next.js 14, React 18, TypeScript
• Web3: wagmi, viem, RainbowKit
• Styling: TailwindCSS, Framer Motion
• Blockchain: ARC Network (Circle L1)

MIT