𝗪𝗵𝗮𝘁 𝗙𝗲𝗲𝘀 𝗗𝗼 𝗬𝗼𝘂 𝗣𝗮𝘆 𝗶𝗻 𝗮 𝗖𝗿𝗼𝘀𝘀-𝗖𝗵𝗮𝗶𝗻 𝗦𝘄𝗮𝗽?

A cross-chain swap isn’t always just “the fee.”

The total cost can involve:

• Source-chain gas
• Protocol/execution costs
• Destination-side costs
• Price impact or slippage

And the balance changes depending on the networks involved. Ethereum, for example, can have very different transaction costs from lower-cost networks such as Base or Polygon.

But there’s an important distinction:

𝗙𝗲𝗲 ≠ 𝗣𝗿𝗶𝗰𝗲 𝗜𝗺𝗽𝗮𝗰𝘁

A fee is a cost charged for executing the transaction.

Price impact is the effect your trade has on the available liquidity and exchange rate. Slippage is the amount of price movement you allow between the quote and execution.

Here’s a real STON.fi quote:

200 USDT on TON
→ 199.7371… USDC

The interface shows the exchange rate before confirmation:

1 USDC ≈ 1.00131 USDT

This is the part I always check before signing.

𝗖𝗵𝗲𝗰𝗸 𝘁𝗵𝗲 𝗾𝘂𝗼𝘁𝗲, 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝘁𝗵𝗲 𝗵𝗲𝗮𝗱𝗹𝗶𝗻𝗲 𝗳𝗲𝗲.

Look at:

→ Amount sent
→ Expected amount received
→ Exchange rate
→ Blockchain fee
→ Price impact
→ Minimum received

STON.fi says these details are displayed before confirmation, giving you a chance to review the actual execution instead of guessing what the swap will cost.

For cross-chain swaps, that final review matters even more because you're coordinating assets across different networks.

The goal isn't simply to find the lowest-looking fee.

It's to understand what you're paying and exactly what you'll receive before you confirm.