The promise of decentralized finance—blockchain-based tools for lending, borrowing, and trading—has been that it would open up savings and investment to people locked out of the financial system. 

But try telling that to someone making their first trade on decentralized exchange (DEX) Uniswap, where the fees to tap into the Ethereum network can run past $100.

Uniwap and layer-2 blockchain Polygon want to alleviate that pain. They announced today that Uniswap is available on Polygon, which was built to take some of the strain off the Ethereum network. 

Uniswap is governed by holders of its native UNI token, predominantly composed of the exchange’s users. Last week, they voted overwhelmingly to deploy smart contracts from the v3 version of the protocol onto Polygon. The deployment was finalized today.

“With this deployment, Uniswap as the flagship Ethereum project returns back to the original promise and again offers low fees and open access to everyone,” wrote Polygon co-founder Mihailo Bjelic in an announcement today.

Polygon has been doing the heavy lifting to bring transaction fees down. The protocol sits atop Ethereum but can connect to other blockchains as part of a “multi-chain system.” Beyond interoperability, its design promotes scalability by routing Ethereum transactions through sidechains. Essentially, it’s like relieving the pressure on a dam by carving a river off to the side.