1Foot
1Foot enables atomic ETH <-> BTC swaps via 1inch Fusion+ using HTLCs and cross-chain resolution.
Demo
About
IMPORTANT: Access relayer and resolver code from organization http://github.com/1foot-Labs ### 🦶 1FootSwap — Secure, Atomic ETH-BTC Swaps Using HTLCs and Dutch Auctions 1FootSwap is an innovative cross-chain swap protocol that enables atomic ETH-BTC and BTC-ETH swaps using Hashed Time Locked Contracts (HTLCs), 1inch Fusion+, and Dutch auction-based pricing. It is designed to be secure, trustless, and user-friendly, ensuring seamless interoperability between Ethereum and Bitcoin. --- ### 🔁 How It Works #### 1. User Intent & Secret Generation * Users access 1FootUI, a simple and intuitive interface to initiate a swap. * They choose the direction (ETH → BTC or BTC → ETH), enter the amount, and generate a secret that will be used to claim funds on the destination chain. * For example, if a user wants to swap 1 ETH, the swap starts with a corresponding amountToReceive of \~0.03 BTC (based on market price). #### 2. Order Creation & Dutch Auction * A Relayer service creates an on-chain Order using the user’s data. * This order is visible to resolvers (liquidity providers or bots) who monitor for active swaps. * A Dutch auction is applied — over time, the amountToReceive decreases gradually, incentivizing resolvers to fulfill the order quickly. #### 3. Resolver Competition & Escrow Setup * Resolvers compete to fulfill the order at the most favorable price. * The winning resolver initiates the HTLC escrow contracts on both Ethereum and Bitcoin. * The user funds the source chain escrow. * The resolver funds the destination chain escrow. #### 4. Relayer Coordination * The Relayer monitors both chains to ensure that: * Escrows are correctly deployed. * Both are funded as expected. * Once verified, the order status is updated to ready to claim. #### 5. User Claims Funds * The user uses the secret they generated earlier to claim their funds on the destination chain, completing the atomic swap securely. --- ### 🔐 Key Features * 💡 Dutch Auction-Based Pricing: Fair and dynamic pricing that rewards resolvers for fast action while letting users control execution time. * 🔗 Cross-Chain Atomicity: Guaranteed atomic settlement via HTLCs — funds are either exchanged fully or refunded, with no risk of partial execution. * 👤 User-Centric Security: The secret used for claiming funds is generated by the user and never shared, preserving complete control. * 🧾 Transparent & Trustless: All steps — order creation, escrow setup, fulfillment, and claim — are verifiable on-chain. * 🌉 Ethereum & Bitcoin Compatible: Bridges the gap between the two largest blockchains with a seamless experience. * 🖥️ User-Friendly Interface: 1FootUI offers a smooth, guided experience with clear instructions at every step — no prior technical knowledge required. * 🤝 Resolver Market: Open participation for resolvers to compete in fulfilling swaps, increasing decentralization and market efficiency. --- ⛓️ How HTLCs Power Atomic Swaps Hashed Time Locked Contracts (HTLCs) are the cryptographic foundation of 1FootSwap's atomic swaps. They ensure that either both sides of a swap complete successfully — or neither does. - Each HTLC locks funds using a hash of a secret (known only to the user). - The contract can be redeemed only by revealing the preimage (i.e., the secret). - If the secret isn’t revealed before a set timeout, the funds become refundable to the original sender. - 1FootSwap deploys HTLCs on both chains (Ethereum & Bitcoin) with synchronized logic and timeouts. This mechanism guarantees cross-chain atomicity — minimizing counterparty risk and removing the need for intermediaries or custodians. --- ### 💭 Why 1FootSwap? 1FootSwap represents a next-generation protocol for secure cross-chain asset exchange. It’s designed for: * Power users seeking trustless, on-chain BTC-ETH swaps. * Liquidity providers and relayers who want to automate competitive market-making. * Everyday users looking for a simple UI that makes complex cross-chain operations feel effortless. ---
How it's made
Frontend (Next.js): Built with Next.js for a fast, responsive UI. Users can easily initiate swaps, track progress, and claim funds through a clean, React-based interface. Resolver (Golang): High-performance resolver bots written in Go. They watch for active orders, compete in Dutch auctions, and handle HTLC deployments on both Ethereum and Bitcoin. Relayer (Node.js): Node.js powers the relayer service, coordinating swaps by monitoring both chains, verifying escrow setups, and updating order status in real time.