Fee Structure

QsnDEX employs a multi-tiered fee system that rewards liquidity providers, funds protocol development, and compensates keepers who maintain order book functionality.

Trading Fee Tiers

Each pool is assigned a fee tier at creation time. The fee is applied to the input amount of every swap.

Tier	Fee Rate	Intended Use Case
Stablecoin	0.01%	Same-peg pairs (USDC/USDT)
Correlated	0.05%	Loosely correlated assets (WETH/stETH)
Standard	0.30%	General volatile pairs (default)
Exotic	1.00%	Long-tail or high-volatility assets

Protocol Fee Split

A portion of every trading fee is directed to the protocol. The protocol fee is set to 1/6 of the LP trading fee.

For the standard 0.30% tier, this means:

• 0.25% goes to liquidity providers
• ~0.05% goes to the protocol via the FeeCollector contract

Fee Flow

The complete lifecycle of protocol fees follows this path:

Swap Transaction
       |
       v
  Trading Fee Deducted (e.g., 0.30%)
       |
       +---> 5/6 to Liquidity Providers (retained in pool reserves)
       |
       +---> 1/6 to FeeCollector Contract
                    |
                    v
              Wrap to WETH (if native ETH)
                    |
                    v
              Distribute to QSN StakeVault
                    |
                    v
              Stream to QSN Stakers over 7 days

Protocol fees accumulate in the FeeCollector contract as various tokens. The FeeCollector wraps any native ETH to WETH and distributes collected fees to the QSN StakeVault, where they are streamed to stakers over a 7-day reward period.

Limit Order Keeper Reward

When a keeper executes a filled limit order on behalf of a user, the keeper receives a reward taken from the swap output.

Parameter	Value
Keeper reward rate	0.1% of output amount
Constant	KEEPER_REWARD_BPS = 10

This incentivizes bots and operators to monitor and execute limit orders promptly.

Staking Pool Creation Fee

Creating a new staking pool requires a fee paid in native ETH, plus a percentage of the deposited rewards.

Parameter	Value
Creation fee	0.01 ETH
Reward fee	2% of deposited rewards
Maximum reward fee	10% (configurable by owner)

The creation fee discourages spam pool creation, while the reward fee funds ongoing protocol operations.

Launchpad Fees

Token launches through the Launchpad contract incur the following fees:

Parameter	Value
Launch creation fee	0.05 ETH
Raised ETH fee	2% of total ETH raised

The creation fee is paid by the project launching the token. The 2% fee on raised ETH is deducted at the conclusion of the sale before the remaining funds are transferred to the project.

Fee Summary

Fee Type	Rate / Amount	Recipient
Trading (stablecoin)	0.01%	5/6 LPs, 1/6 protocol
Trading (correlated)	0.05%	5/6 LPs, 1/6 protocol
Trading (standard)	0.30%	5/6 LPs, 1/6 protocol
Trading (exotic)	1.00%	5/6 LPs, 1/6 protocol
Protocol share	1/6 of trading fee	QSN stakers via vault
Limit order keeper	0.1% of output	Keeper address
Staking pool creation	0.01 ETH + 2% rewards	Protocol treasury
Launchpad creation	0.05 ETH	Protocol treasury
Launchpad raised funds	2% of raised ETH	Protocol treasury