Arc Treasury - USYC Yield with Circle CCTP

Arc Treasury is a full-featured DeFi treasury management platform built on Arc Network's EVM testnet, leveraging Circle's CCTP V2 protocol for seamless cross-chain USDC transfers. Core Features: Treasury Vault - Users deposit USDC into a yield-generating vault backed by USYC (Hashnote US Treasury Fund, ~4.2% APY). Supports flexible deposits and locked positions (1M/3M/12M) with reward multipliers (1.5x/2x/3x). Smart contracts handle deposits, withdrawals, and yield distribution on-chain. Cross-Chain Bridge - Bidirectional USDC bridging between Arc Testnet and Ethereum Sepolia using Circle CCTP V2's depositForBurn/receiveMessage flow. Includes automatic attestation polling, auto-claim on destination chain, and a BridgeWrapper contract that tracks all transfers and collects a 0.05% protocol fee. Solana Devnet bridge support is also integrated. StablecoinSwap - An on-chain AMM for USDC/EURC trading with 0.2% swap fees. Users can provide liquidity and earn from trading activity. Points & Rewards - Permanent points system with actions like deposits, bridges, swaps, and referrals. Leaderboard displays top 50 users. Locked positions and badges provide multipliers. Early Supporter Badge - NFT minted on Arc Testnet. Provides a permanent 1.2x points multiplier. Referral System - 5-tier structure (Bronze→Diamond) with unique referral codes. Higher tiers unlock better rewards from referred users' activity. Additional Features: Profile management with wallet/email/Twitter binding, support ticket system, litepaper, and comprehensive FAQ. Technical Stack: React/TypeScript, Solidity, Vercel, wagmi/viem for EVM interactions, Circle CCTP, Twitter OAuth 2.0, Supabase backend.