Sui Fusion+

Problem Statement

WORK IN PROGRESS: A cross-chain DeFi protocol that bridges 1inch Fusion+ intent-based trading with Sui blockchain, enabling seamless asset swaps across multiple chains. The project implements non-custodial HTLC-based swaps with timelock protection, MEV resistance, and gasless transactions. Features include competitive Dutch auction pricing, partial fills, and cryptographic settlement without cross-chain messaging. Built with Move smart contracts for Sui and TypeScript SDK for easy integration. Resolvers compete to execute swaps at optimal rates while covering gas fees, providing users with MEV-secure, efficient cross-chain liquidity access.

Solution

Technical ArchitectureSmart Contracts (Move)Limit Order Module: Core trading logic with order creation, validation, and executionFusion Module: Cross-chain integration with HTLC (Hash Time-Locked Contract) implementationTimelocks: Compact storage for multi-stage timelock managementImmutables: Cryptographic commitment structures for escrow operationsKey Components:Order Management SystemUses Sui's native cryptographic algorithms (for addresses, hashing, and off-chain signing)Event emission for order lifecycle trackingCross-Chain IntegrationHTLC-based escrow system for non-custodial swapsTimelock stages: withdrawal, cancellation, public access periodsCryptographic commitments instead of bridge messagingTypeScript SDKLimitOrderSDK class for easy integrationTransaction building with Sui's Transaction APIOrder validation and management utilitiesSecurity FeaturesMEV protection through intent-based tradingTimelock protection with automatic fund recoverySignature validation for order authenticityAmount validation to prevent overflowImplementation Flow:Users create orders through SDKOrders are hashed and stored on-chainResolvers compete to fill orders via Dutch auctionHTLC escrows secure cross-chain transfersTimelocks ensure fund recovery if swaps failThe project bridges Ethereum's 1inch Fusion+ intent-based trading with Sui's Move-based smart contracts, enabling secure cross-chain DeFi operations.