YakSwap

YakSwap is an on-chain decentralized exchange (DEX) aggregator designed for Ethereum Virtual Machine (EVM) compatible blockchains such as Avalanche, Arbitrum, and Optimism. It provides a set of smart contracts that enable users and developers to find the optimal swap path between two tokens, maximizing the net output amount by factoring in both the token exchange rates and the gas costs associated with executing the swaps. This approach helps users achieve better trade efficiency by considering the often-overlooked impact of gas fees on overall swap profitability.

The core component, YakRouter, serves as the user-facing interface for price queries and trade execution. It exposes functions like findBestPathWithGas, which returns the best token swap route with gas cost estimates, and swapNoSplit, which executes trades along a specified path. YakSwap uses adapters as modular interfaces to interact with various external liquidity sources and protocols, allowing it to aggregate liquidity across multiple DEXs. These adapters implement query and swap methods to facilitate price discovery and trade execution.

YakSwap is primarily targeted at DeFi developers and infrastructure teams looking to integrate efficient on-chain swap routing into their applications or services. It requires integration with EVM-compatible chains and can be used off-chain to query optimal paths before submitting transactions. The project is open source under GPL-3 and supports local development with tools like Hardhat for testing, deployment, and verification. While it is not audited, the community can engage via the YakDevs Telegram group for support and updates.

Developers can get started by cloning the repository, installing dependencies, setting environment variables, and running tests or deployment scripts. The modular adapter architecture allows easy extension to new liquidity sources. YakSwap’s on-chain pathfinding and gas-aware routing differentiate it from many off-chain aggregators by enabling fully on-chain price discovery and execution, which can improve transparency and composability in DeFi applications.