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🌞 SunnySwap - Trustless Cross-Chain Atomic Swaps Between Stacks & EVM Chains

SunnySwap enables instant, trustless token swaps between Stacks (STX) and Ethereum (ETH) using Hash Time-Locked Contracts (HTLCs). No centralized exchanges, no custody risk - just pure peer-to-peer atomic swaps.

🔥 What is SunnySwap? A decentralized cross-chain swap protocol that lets you trade STX for ETH (or any EVM token) without trusting any intermediary. Powered by cryptographic hash locks and time-based smart contracts.

⚡ Key Features:
✅ Trustless atomic swaps - either both sides complete or both refund
✅ Cross-chain between Stacks and Ethereum/EVM chains
✅ No wrapped tokens or bridges required
✅ Non-custodial - you control your keys
✅ Automated resolver bot handles coordination
✅ Built on battle-tested HTLC technology

🏗️ Technical Architecture:
Stacks Layer: Clarity smart contracts (stx-htlc.clar) for STX locking
EVM Layer: Solidity escrow contracts for ETH/ERC20 locking
HTLC Protocol: Hash Time-Locked Contracts ensure atomicity
Resolver Bot: Automated coordination between chains
Upstash Redis: Decentralized order matching

🎯 How It Works:
User locks ETH on Ethereum with a secret hash
Resolver detects lock and locks STX on Stacks
User claims STX by revealing the secret
Resolver claims ETH using the revealed secret
Both parties get their tokens - guaranteed!

🛠️ Tech Stack:
Frontend: Next.js 14, TypeScript, TailwindCSS
EVM: Solidity, Ethers.js, Hardhat
Stacks: Clarity, @stacks/transactions
Wallets: MetaMask, Hiro Wallet
Infrastructure: Vercel, Upstash Redis

📜 Smart Contracts:
Sepolia Testnet: Factory at 0x506485C554E2eFe0AA8c22109aAc021A1f28888B
Stacks Testnet: HTLC at ST3QA58TFC73X12Z2B809AMS6V14Y0FA4VR2TTYMF.stx-htlc

🔗 Links:
Live Demo: https://sunnyswap-stacks-front-end.vercel.app
GitHub: https://github.com/FrankiePower/sunnyswap-...

⚠️ Disclaimer: This is a testnet demo. Use at your own risk. Never share your private keys. 🏷️ Tags: #Stacks #Bitcoin #Ethereum #DeFi #AtomicSwaps #CrossChain #Web3 #Crypto #Blockchain #SmartContracts #HTLC #Trustless #Decentralized #STX #ETH

🚀 Built for the Stacks ecosystem. Powered by Bitcoin.