Whitelist Fee Discount

Summary

This plugin allows DEXes to set swap fees for the specific set of user addresses on specific pools. When a user with a whitelisted address performs swap a custom static fee is applied.
Custom fee settings can be used to incentivize known actors that perform a big volume of swaps. Fee discount will make swaps more attractive for such actors and will in turn result in bigger swap volume.
By managing the trade-off between volume and fee discount it is possible to reach the point of mutual benefits for both LPs and big traders.

Features

UI-less: this plugin can be configured via direct contract calls by DEX owner or Fee Discount Manager role
Low gas overhead: 17K gas on every swap

Benefits

DEX: DEXes gain the way to incentivise market-maker traders to attract extra volume.
LPs: Liquidity Providers benefit from increased swap volumes that recompense the fees discount on swaps.
Traders: Market-maker traders benefit from reduced swap costs while regular traders do not feel any side effects.