STON .fi launched TON’s decentralized financial infrastructure for Bitcoin and Ethereum, allowing users to transfer cbBTC and wETH onto the TON blockchain and utilize them within native DeFi platforms. This integration was built on TAC-driven bridging along with STON .fi’s Omniston liquidity layer.
Bitcoin enters the TON ecosystem in the form of cbBTC, a Coinbase-issued wrapped token backed 1:1 by native BTC, while Ethereum arrives either as wETH or through oETH via Orbit Bridge. To facilitate the transfer, STON.fi routes both assets through TAC, a purpose-built EVM layer designed to connect external liquidity to TON.
From there, assets are delivered to TON wallets using the native TAC bridge. The architecture effectively creates a structured pathway for blue-chip crypto assets to move into TON’s DeFi environment.
For Ethereum transfers, the system relies on the Omnichain Fungible Token (OFT) standard to maintain a strict 1:1 peg for wETH during cross-chain movements. Alternatively, users can bridge ETH value into TON using Orbit Bridge’s oETH.
On the Bitcoin side, Stargate Finance is built on LayerZero’s cross-chain messaging infrastructure and serves as the initial routing layer into TAC, after which the TAC bridge completes the final step onto TON. Together, these components form a multi-layer routing stack designed to preserve value integrity while enabling interoperability.
STON.fi frames the integration as more than simple asset expansion. According to CEO Slavik Baranov, the objective is to unlock functional utility for BTC and ETH within TON’s DeFi ecosystem, allowing users to deploy these assets actively rather than holding them passively.
Ston.fi execution and TON ecosystem with Bitcoin
At the center of the execution model sits Omniston, STON.fi’s liquidity aggregation and routing engine. Omniston sources quotes across TON-based DEXs and professional liquidity providers, then sends request-for-quote (RFQ) calls to competing resolvers. Swaps are executed using escrow-based mechanics designed to approximate atomic settlement, minimizing counterparty exposure while ensuring users retain control of their private keys.
Performance metrics provided by the project highlight transaction finality on TON of roughly five to six seconds, with typical on-chain fees reported below $0.30 per transaction. cbBTC is described as fully backed 1:1 by native Bitcoin and issued by Coinbase, reinforcing its positioning as a custodially backed wrapped asset. Execution enhancements such as RFQ routing and escrow swaps are intended to reduce slippage and improve price efficiency relative to single-venue trading.
That said, the structure introduces layers of interoperability risk that compliance teams and product managers will need to evaluate carefully. Wrapped asset conventions, on-chain proof-of-reserves transparency, and dependencies on TAC, LayerZero/Stargate, and Orbit Bridge infrastructure all represent operational considerations. As adoption scales, counterparties will likely monitor these technical dependencies closely.
