SushiSwap RouteProcessor3 is a contract that processes complex swap routes. It can mix pools from different DEXes such as Sushiswap and Uniswap in one route. It also allows for liquidity merges and splits at arbitrary points of the route. The contract does not create routes; it merely processes routes that are created off-chain.

Zellic conducted a security assessment for Sushiswap from April 13th to April 14th, 2023. During this engagement, Zellic reviewed SushiSwap RouteProcessor3's code for security vulnerabilities, design issues, and general weaknesses in security posture.