TON AND ETHEREUM SWAP
STON.fi’s approach to cross-chain swapping is built around a simple idea: users should be able to exchange value across independent blockchains without first turning their assets into wrapped representations.
With Omniston, STON.fi uses a resolver-based execution model combined with Request for Quote (RFQ) and Hashed Timelock Contracts (HTLCs) to coordinate swaps between TON and networks such as Ethereum. Instead of relying on a conventional lock-and-mint bridge, the system is designed to deliver the asset the user actually requested on the destination chain.
How Omniston Connects TON and Ethereum
TON and Ethereum operate as separate blockchain environments, so a native asset on one network cannot simply appear on the other. Omniston addresses this coordination problem by introducing resolvers—liquidity providers that compete to fulfill cross-chain orders.
When a user creates a swap, Omniston sends an RFQ to available resolvers. They return executable quotes based on the assets, amounts and destination requirements. The selected resolver then commits its own destination-side liquidity, creating a direct economic incentive to complete the transaction.
This means the resolver is not merely making a promise to provide Ethereum liquidity. Its destination-side funds are committed through the settlement mechanism itself.
The Role of HTLCs
The technical foundation is the Hashed Timelock Contract.
For a TON-to-Ethereum swap, the source-side and destination-side assets are placed into linked HTLCs that use the same cryptographic condition. A secret unlocks the settlement. Once that secret is revealed, the user can claim the Ethereum-side asset, while the resolver can claim the TON-side asset using the same secret.
The timelock provides the second layer of protection.
If the required condition is never completed within the defined time window, the locked assets become refundable according to the contract rules. In practical terms, the design aims for an all-or-nothing outcome: successful settlement for both sides, or a refund path rather than an indefinitely incomplete swap.
A TON → Ethereum Swap, Step by Step
Imagine a user wants to exchange a TON-side asset for an Ethereum-side asset.
1. Select the route
The user chooses the source asset on TON, the destination asset on Ethereum, and the receiving wallet.
2. Request a quote
Omniston distributes an RFQ to participating resolvers.
3. Compare execution
The user receives a quote showing the expected output and relevant costs before confirming.
4. Commit the source-side transaction
The user authorizes the TON-side commitment. As with any TON transaction, network gas is still required.
5. Resolver commits Ethereum liquidity
The selected resolver locks the destination asset on Ethereum through the corresponding HTLC using the linked cryptographic condition.
6. Settlement occurs
Once the secret is revealed, the destination asset becomes claimable and the resolver can claim the source-side asset.
7. Refund when necessary
If the settlement condition is not fulfilled within the required timeframe, the timelock mechanism provides the applicable refund path.
Why This Is Different From a Traditional Bridge
The biggest distinction is what actually happens to the assets.
A conventional bridge commonly follows a lock-and-mint model: the original asset is locked on one chain and a wrapped representation is issued on another. That wrapped asset then depends on the bridge infrastructure maintaining the underlying relationship.
Omniston takes a different route.
It is designed as a cross-chain exchange, not a mechanism for creating a wrapped copy of the original token. The user requests a destination asset, and a resolver supplies that asset from its own destination-side liquidity.
So instead of:
Asset A → bridge lock → wrapped Asset A
the model is closer to:
Asset A → atomic exchange → native Asset B
That distinction can be important for users who want to use the destination asset directly rather than receive a bridged representation.
Why Resolvers Matter
Resolvers are one of the most important parts of Omniston’s architecture.
They effectively turn cross-chain liquidity into a competitive marketplace. Multiple resolvers can respond to the same RFQ, allowing execution to be driven by available liquidity and pricing rather than a single bridge reserve.
The resolver takes on the destination-side execution responsibility and commits capital to the trade. This removes the need for a single shared vault holding a massive pool of user funds, which is a major structural difference from many traditional bridge architectures.
For larger orders, Omniston can also support partial fills, allowing an order to be divided into independent sub-swaps rather than forcing the entire amount through one execution path.
What Users Should Actually Care About
The technology underneath Omniston is sophisticated, but the user-facing objective is straightforward:
Choose what you have, choose what you want, review the quote, and let the protocol coordinate the cross-chain settlement.
Still, users should not ignore the practical details. The final amount, fees, destination network, receiving address and required gas should always be checked before confirming a transaction. Cross-chain execution does not eliminate network costs, and the destination chain still matters for settlement speed and usability.
The Bigger Picture
Omniston demonstrates an important evolution in cross-chain DeFi.
Instead of asking, “How do I move this token across a bridge?”, the experience becomes, “What asset do I want to receive on the other chain?”
That is a fundamental shift from asset transportation toward cross-chain execution.
Through RFQ-based resolver competition, native destination liquidity and linked HTLCs, STON.fi’s Omniston architecture is designed to connect TON with independent networks such as Ethereum while avoiding the traditional wrapped-asset step. The result is a model centered on direct exchange, cryptographic settlement and predefined refund conditions rather than dependence on a shared bridge vault.
For anyone exploring cross-chain DeFi, understanding this distinction is essential: a bridge moves representations of assets, while an atomic cross-chain swap can exchange one native asset for another. Omniston is built around the latter model.
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