FAQ
Swap
What’s new in Exchange V3?
Concentrated liquidity - liquidity will be concentrated on the most actively traded price range, which means:
Lower trading slippage for traders
Potentially more LP fee rewards for liquidity providers
A flexible trading fee structure - Liquidity providers can choose between multiple trading fee tiers when creating liquidity pairs or providing liquidity
Customisable price range - Liquidity providers can also choose what price ranges they want to provide liquidity to
Can I add my own tokens to Exchange V3?
Everyone can create liquidity pools by depositing liquidity on V3.
However, the following tokens are currently NOT supported:
Fee-on-transfer tokens
Rebase tokens
For these token, please do NOT add liquidity on Exchange V3. Your assets may stuck in the liquidity position.
How come my transaction won't go through?
FusionX is a DeFi application such that it interacts with the wallet to complete on-chain transactions for swapping, creating LPs, staking in farms and pools, etc.
Gas Fees
As such, the first thing is to make sure you have enough FSX to pay for the gas fee of the on-chain transactions. Typically, gas fee fluctuates depending on the number of transactions in the queue, if there are more transactions, a higher gas fee may be required to push through the transaction. On Mantle Smart Chain, the gas fee typically ranges from cents to a dollar USD in FSX. Learn more about gas fee here.
Transaction Fees
If your swapping action still doesn't go through and it is displaying an error for you to revise the slippage -- you may want to check if the tokens you are trying to swap has any fees and restrictions on transactions.
It is not uncommon for tokens on Mantle Chain to include a transaction fee in their contracts, usually these fees could be used for burning, funding a treasury of a fair launch project -- for example, this APX token has an 1% tax on every transaction for sending to a burn address, such that more transactions would mean more burning, accruing value to APX token holders.
With the transaction fee, whether it is inclusive (a portion of the swap amount is sent elsewhere than your address so the output is less than expected for the estimated input) or exclusive (requiring an additional transfer from your address to send extra tokens so the input is more than expected for the estimated output), it affects the input and output amount that you agree for signing the transaction. In many cases, the transaction cannot meet the input and output requirements because of the tax.
Swapping with Transaction Fees
In some extreme cases including some scams, some tokens even have a block on most or all transfers on chain, or only allowing certain addresses to sell, in such case it is impossible to swap the token successfully. Do learn about the token you are trying to swap and be aware of any fees and restrictions!
In some extreme cases including some scams, some tokens even have a block on most or all transfers on chain, or only allowing certain addresses to sell, in such case it is impossible to swap the token successfully. Do learn about the token you are trying to swap and be aware of any fees and restrictions!
Does the new Swap interface use v2 or stable swap liquidity?
Yes. The new Swap v3 uses liquidity from FusionX v3, v2 to get the best trading route.
What is split routing?
In Swap v3, your trade might be broken into multiple routes to execute your trade with the best rate.
To view more detail of how your trade is routed, tap the “v” button on the “Route” section to expand and view the details.
Learn more in here.
How to customise or disable certain liquidity sources?
The new Swap v3 uses liquidity from FusionX v3, v2 and stable swap to get the best trading route. However, you can customize or disable certain liquidity sources if you do not want your trade to route through them.
When viewing a trading route, click the “Customize Routing” button. Or click the cog ⚙️ button on the top right hand corner of the Swap interface and choose “Customize Routing”.
Within the “Customize Routing” pop up, you are able to choose which liquidity source you want to utilise. Or disable multihops completely.
Note: disabling multihops could lead to increased slippage or worse trading rate on specific trading pairs. Proceed with caution.
Learn more in here.
Liquidity
What are fee tiers and how to pick the correct one?
In Exchange v3, when you are providing liquidity, you can choose between several different trading fees (0.01%, 0.05%, 0.25%, and 1%) for the same token pair.
For example, for FSX, there might be a 0.25% pair, which means a 0.25% trading fee is in place for every trade. However, some liquidity providers might choose to provide liquidity to a FSX trading pair with a 0.05% fee rate, offers a better quote and attract more trading volume.
There is no “correct” answer for which trading fee configuration to choose. It depends on the tokens within the trading pair. Usually, volatile tokens should have a higher trading fee to better compensate for the impermanent loss brought by the volatility. On the other hand, tokens like stable coins have smaller price movements and lower impermanent losses, therefore their trading fee should be lower.
When selecting a token pair, the “Add Liquidity” interface will automatically choose the most popular fee tier for you.
Why two of my deposit tokens are not equal in USD value?
In Exchange V3, underlying assets in a liquidity position will not always have an equal value in USD. It will depend on the price range settings of a position and the current price of the pair.
In fact. If your position goes out of range, all tokens will be converted to one single asset. Plus, you can provide liquidity to a price range that does not cover the current price and deposit one single asset only. Continue reading to learn more ⬇️
What happens if my liquidity position goes out of range?
You will not earn any trading fee rewards if the current price goes out of the price range defined in your position.
On top of that, all tokens will be converted to one single asset depending on the direction of the price condition.
Please not that if the price moves back in the range, you will start receiving trading fee rewards again. No additional actions are required.
Is it better to always provide liquidity with a smaller range?
Providing liquidity to a smaller price range will help concentrate your liquidity to a spesific price range, boosting your relative shares again the total liquidity within the price range, potentially earning more trading fee rewards.
However, please bear in mind that only active liquidity positions will earn trading fee rewards from trades. This means you will only earn rewards when the current trading price is within the price range defined in the liquidity position.
Are there any ways to automatically adjust my position so it is always in range and earning fee rewards?
Automatic position managing feature is coming soon to FusionX v3 with one-click liquidity depositing (Zap!). Stay tuned for more detail.
Are LP fee rewards automatically compounded like Exchange v2?
No.
In Exchange v3 you will need to claim trading fee rewards manually. You may do that on the position detail page. You may find all your v3 liquidity positions on the liquidity page.
What affects LP APR?
In Exchange v3, LP fee reward APR could vary between liquidity positions. It is based on the following factors:
Trading volume - more volume generates more fee rewards
Liquidity pair fee tier - higher fee tier generates more fee rewards from individual trades
The number of tokens deposited - more token in the position translates to a larger relative share against the total active liquidity, which gets more trading fee rewards from trades
The selected price range - smaller price range allows a higher concentration for the same amount of token deposited, which translates to a larger relative share against the total active liquidity, and gets more trading fee rewards from trades
The amount of liquidity currently active - if there are more users who deposit and concentrate their liquidity with the same range as you, you will earn less trading fee due to a smaller relative share against the total
Whether the liquidity position is active - only active liquidity positions will earn trading fee rewards
Can I provide v2 liquidity?
Providing v2 liquidity is no longer advisable. We recommend using v3 liquidity to take advantage of the new features to improve efficiency.
If you want to proceed with adding v2 liquidity:
If the token pair does not have a v3 pool, or it has more liquidity in v2 than the largest pool in v3. A “Add V2 Liquidity” will appear. Simply click to switch to adding v2 liquidity
Alternatively, use
/v2in the URL to always use v2 liquidity provisioning
Why can’t I add liquidity to a pair I just created?
Due to a bug from the legacy Exchange V2 (present in every UniSwap V2 forks), you will not be able to add liquidity to a pair using the normal FusionX liquidity UI and its contract calls if a pair is:
Created by calling
createPairon FactoryV2 without depositing initial liquidity and minting the initial LP tokensThen, one of the tokens in the pair has been manually transferred into the pool contract while calling
sync
Recently, an increase amount of such attacks were spotted on FusionX Exchange V2 on Mantle.
We strongly recommend using our UI to create the trading pair for your token by adding the initial liquidity with the pair creation.
Last updated