STON.fi + Arc: Another Step Toward Connected Stablecoin Liquidity
Circle’s Arc network has now been added to @ston_fi cross-chain swap infrastructure, allowing users to swap USDC on Arc with supported assets across other connected networks.
But the important part of this update is bigger than simply adding another chain.
🔹 What is Arc?
Arc is an EVM-compatible Layer-1 designed around stablecoin-based finance. USDC is used as its native gas asset, and the network is designed for use cases such as payments, FX, capital markets and tokenized assets.
So Arc is entering the ecosystem with a strong focus on stablecoin activity.
🔹 What does STON.fi add?
Through Omniston, STON.fi provides a cross-chain execution layer that allows users to request swaps between supported networks.
The current supported stablecoin routes mentioned in the update include:
• $TON : USDT
• TRON: USDT
• BNB Chain: USDT + USDC
• Base: USDT + USDC
• Polygon: PUSD + USDC
• Robinhood Chain: USDG
• X Layer: USDC + USDT0
• Arc: USDC
That means Arc's USDC can now participate in a broader cross-chain liquidity environment through the STON.fi infrastructure.
Why is this important?
Stablecoins exist across many different networks.
The problem is that liquidity becomes fragmented.
You might have USDC on one chain while the liquidity or asset you need exists somewhere else.
Traditionally, moving between ecosystems can require several separate steps.
Omniston is designed to simplify that by handling quote discovery, routing and cross-chain execution through one infrastructure layer. Resolvers provide destination-side liquidity and compete through RFQs, while linked HTLCs provide the atomic settlement mechanism.
In simple terms:
Choose source → choose destination → receive a quote → confirm → cross-chain execution → receive the destination asset.
Another important detail: atomic execution
This isn't simply about connecting more chains.
Omniston's cross-chain model uses linked Hashed Timelock Contracts (HTLCs).
The idea is:
Either the swap completes according to the agreed conditions, or the locked funds can be refunded.
So the infrastructure is designed around an all-or-nothing settlement model, rather than leaving one side of a cross-chain transaction permanently completed while the other side fails.
And there is a limit
At launch, the update says cross-chain swap volume is temporarily limited to $1,000 per transaction.
That's important to understand.
The Arc integration is available, but users should still check the current route, supported assets, quote, fees and transaction limits before confirming a swap.
The bigger picture
What I find interesting here is the direction of the ecosystem.
STON.fi isn't only connecting TON to one additional blockchain.
The infrastructure is gradually connecting stablecoin liquidity across multiple networks and giving applications a way to interact with that liquidity through Omniston.
Arc brings another stablecoin-focused network.
Omniston provides the cross-chain execution infrastructure.
And users get another route for moving value between supported ecosystems.
The real challenge in multi-chain DeFi isn't creating more chains.
It's making those chains easier to connect.
That's what makes this STON.fi update worth paying attention to.