Basic Info

• Requester name: George Negru
• Requester Github id: @negrugeorge
• Review branch link: https://github.com/tokamak-network/tokamak-thanos/tree/L2toL2Implementation
• Commit hash: [TO BE UPDATED]
• Expected review duration: ??
• Review completion deadline: [TO BE DETERMINED]
• Audit scope: CrossTrade Audit Scope
• Contract explanation: CrossTrade Contract Info
• Seminar link: [TO BE SCHEDULED]

Overview

The CrossTrade system is a decentralized cross-chain trading protocol that enables fast, trustless token swaps between Layer 2 chains via Layer 1 as a bridge hub. The system supports two main flows:

1. L2-to-L1 CrossTrade: Direct swaps from L2 to L1 chains
2. L2-to-L2 CrossTrade: Cross-chain swaps between different L2 chains using L1 as an intermediary

The protocol operates on a request-provide model where:

• Requesters lock tokens on source chain and specify desired tokens on destination chain
• Providers fulfill requests by providing tokens on destination chain and claiming locked tokens from source

Key Innovation

CrossTrade eliminates the need for traditional 7-day withdrawal periods by using cross-domain messaging and provider incentives, enabling near-instant cross-chain transfers.