ThunderPortal
Atomic swaps between ETH and BTC extending 1inch Fusion+ with custom Bitcoin HTLC service.
Demo
About
Thunder Portal enables trustless atomic swaps between Bitcoin and Ethereum without bridges or wrapped tokens. We extended 1inch Fusion+ protocol to support native Bitcoin through a custom HTLC service written in Rust. Key features: - True atomic swaps with cryptographic guarantees - No intermediary tokens or bridges required - Real testnet transactions on Bitcoin testnet3 and Ethereum Sepolia - Order chunking for improved liquidity matching - CLI demo and live testnet swap functionality Our solution solves the trust problem in cross-chain swaps by using Hash Time Locked Contracts (HTLCs) on both chains, ensuring either both transactions complete or neither does.
How it's made
Thunder Portal consists of three main components: 1. Bitcoin HTLC Service (Rust): Custom service that creates and manages Bitcoin HTLCs, handles script generation, and monitors the Bitcoin testnet3 network. 2. Ethereum Smart Contracts (Solidity): Factory pattern for deploying escrow contracts that implement HTLC logic on Ethereum Sepolia. 3. Thunder Portal CLI (TypeScript): Orchestrates the atomic swap process, manages order chunking, and provides user interface. We extended the 1inch Fusion+ architecture by adding Bitcoin support through our HTLC service. The system ensures atomicity by using the same preimage hash on both chains - revealing the preimage claims both sides of the swap simultaneously. Notable technical achievements: - Real Bitcoin script generation for HTLCs - Atomic guarantee without trusted intermediaries - Live testnet deployment with verifiable transactions