STON.fi, the decentralized exchange that started as the leading automated market maker on The Open Network, has rolled out cross-chain swaps for stablecoins. The feature lets users move stablecoins directly between TON, TRON, Ethereum, Base, BNB Chain, Polygon, Avalanche, Arbitrum, and Robinhood Chain — all through a single self-custodial interface. It's a big step for a protocol that's been quietly expanding beyond its TON roots.
How the swaps work
The system is powered by Omniston, an execution layer STON.fi built to coordinate swaps between source and destination chains. Most transactions complete in 15 to 40 seconds. That speed comes from Hashed Timelock Contracts, or HTLCs, which ensure atomicity: either both sides of the trade settle, or neither does. Users see the exact amount they'll receive before confirming, and if the swap can't finish, funds are returned automatically. No guesswork, no stuck money.
Why stablecoins
The stablecoin market now tops $300 billion in total capitalization, with TRON and Ethereum hosting the two largest networks. That's a lot of liquidity sitting in silos. STON.fi's cross-chain swaps let users move that value without going through a centralized exchange or wrapping tokens. For anyone holding USDT on TRON who wants to use it on Arbitrum or Base, it's a direct path.
Backing and background
STON.fi was originally built as an AMM on TON and has since evolved into a cross-chain DEX. The project is backed by CoinFund, Delphi Ventures, The Open Platform, Karatage, and TON Ventures. Slavik Baranov is the CEO of STON.fi Dev. The team didn't provide a timeline for adding non-stablecoin assets, but the infrastructure is in place for more chains and tokens down the line.
The cross-chain swaps are live now. Users can try them on the STON.fi interface.
