Fiss

Problem Statement

Fusion+ on SuiChain extends the cross-chain Dutch auction model by integrating Sui's devnet as a destination escrow. Makers create and sign orders, which are shared with resolvers via a relayer. Resolvers deposit and withdraw tokens using on-chain escrows (e.g., Sepolia → Sui), using secrets revealed.

Solution

We built this project as an extension of the Fusion+ Dutch auction protocol, integrating the Sui blockchain. The system is composed of smart contracts on both Ethereum Sepolia (source chain) and Sui Devnet (destination chain), handling escrow deposits and withdrawals. The relayer handles order announcements and secret sharing after finality, while a Supabase database tracks active orders and state updates in real time. Resolvers interact with both chains, driven by EIP-712 signed orders from the maker.