A same-chain ZKsync Era swap exchanges assets that already exist on ZKsync Era. Moving an asset from Ethereum or another network is a bridge operation. The distinction affects contracts, token representations, fees and the steps you must verify.
This guide explains the user-side checks for a ZKsync Era swap. It avoids fixed gas or liquidity figures because both can change. The goal is to understand the route and wallet request before signing.
Prepare the correct network and gas token
Use a compatible wallet and confirm ZKsync Era is selected. The official ZKsync Era network details list the current network name, chain ID, native currency and explorer. Use that source rather than copying settings from an unverified page.
Keep enough ETH on ZKsync Era for gas unless the wallet and application explicitly disclose a supported paymaster or alternative fee mechanism. Paymaster support is application-specific and should never be assumed.
If the funds are not yet on ZKsync Era, review bridge vs swap before moving them.
Step 1: verify both token contracts
Check the input and output contract addresses against official issuer information and a reputable ZKsync Era explorer. A symbol can be duplicated, and a bridged representation may differ from the token contract used on another network.
Verify that the intended receiving application supports the exact representation. Then follow the full token, network and contract checklist.
Step 2: request the exact quote
Enter the amount you actually plan to swap. Review estimated output, minimum received, price impact, route, explicit fees, gas and any required approval.
Do not compare different amounts or quotes captured far apart in time. A route that works well for a small order can show different price impact for a larger one.
Latin Link is a non-custodial liquidity aggregation interface. Its routing can consider eligible sources through OpenOcean. Aggregation can discover a different path but cannot guarantee a superior result. Evaluate the full quote using how to compare liquidity routes.
Step 3: understand ZKsync fees
ZKsync does not use a fee model identical to Ethereum mainnet. The official ZKsync fee structure explains that transaction costs include computation and data-publication considerations linked to Layer 1 conditions. The wallet's current estimate is therefore more relevant than a historic average.
| Component | What it represents | What the user should check |
|---|---|---|
| Network fee | Cost of processing and publishing the transaction | Current wallet estimate |
| Pool or interface fee | Explicit cost along the swap route | Quote details |
| Price impact | Effect of the trade on liquidity | Trade size and route |
| Slippage tolerance | Adverse price movement accepted | Minimum received |
| Approval | Permission for a contract to spend an ERC-20 | Token, spender and amount |
The guide to slippage, price impact and gas explains why these values should not be merged into one number.
Step 4: inspect the route and liquidity
The direct pool may not be the best available path. A router can use intermediate assets or split execution when supported. More complex routing can improve output but can also add gas or contract interactions.
Compare:
- output after explicit fees;
- minimum received;
- price impact;
- route complexity;
- current gas estimate;
- token and protocol risks.
No router can create liquidity that does not exist. If no reliable quote is available, do not force the trade by accepting extreme slippage.
Step 5: review approvals and the final signature
An ERC-20 approval may precede the swap. Treat it as a separate transaction. Verify the spender, token and allowance.
Before signing the swap, confirm:
- ZKsync Era is the active network;
- the correct token contracts are shown;
- input, expected output and minimum received are acceptable;
- the receiving address is your wallet;
- the router matches the interface route;
- the gas estimate is within your limit.
Cancel an unexpected chain switch, opaque signature or unrelated transfer.
Step 6: verify the transaction
Open the transaction hash in the official or another reputable ZKsync Era explorer. Check status, transfers, contracts and destination. If the output token is missing from the wallet interface, verify its contract before importing it.
ZKsync documentation notes that its gas model differs from Ethereum's. Do not copy hardcoded gas assumptions from Ethereum into a ZKsync transaction or try to override the wallet estimate without understanding the consequences.
Common ZKsync swap mistakes
- confusing a bridge transaction with a same-chain swap;
- adding the wrong network settings;
- importing a token by symbol only;
- having no ETH on ZKsync Era for gas;
- assuming an approval completed the swap;
- comparing stale or unequal quotes;
- increasing slippage to bypass a liquidity problem.
Frequently asked questions
What token normally pays gas on ZKsync Era?
ETH is the native currency listed in the official ZKsync Era network details. Some applications may support other fee flows through account abstraction or paymasters, but support must be confirmed for the specific transaction.
Are ZKsync fees the same as Ethereum fees?
No. ZKsync has its own execution and data-publication fee model. Current L1 conditions can influence part of the cost.
Why can two ZKsync swap interfaces show different outputs?
They may search different pools, market makers or routes and apply different fees. Quote timing and trade size also matter.
Does Latin Link hold my funds?
No. Latin Link is non-custodial. The user keeps control of the wallet and signs the on-chain transaction.
Can a confirmed swap be reversed?
Not by Latin Link. Confirmed blockchain transactions are not reversible through a non-custodial interface.