Implement Taxes

[ThatOverPowered]

Feature related to a problem ?

No, just a new feature, add a taxes system would be great, like real life it self. Also gives the plugin a nice touch.

Describe the solution you'd like

Personally, I would like it this way (of course it all depends on the developer):

The seller: When the seller sells an item and a player buys it, the seller will receive less money than the sale price of the item.
Example: I sell 1 apple for 50 coins, but I have 15% tax because I have the "marketplace.tax.15percent" permission, so when a player buys the apple from me, I will get 42,5 coins.

The buyer: Almost the same as the seller but in reverse. In this case, it would be a discount instead of a tax. The working method will be the same.
Example: I buy 1 apple that was set at 50 coins, if I don't have permission to get a discount, that's it, the apple is purchased at 50 coins. But if I have a discount permission "marketplace.disscount.5percent", I bought the apple for 47.5 coins.

Configuration file:
So, we have the idea, but how it will be displayed in the configuration files, so that the user can customize their taxes and discounts.
Here's an example:

// Taxes and discounts:

Taxes:
CustomNameForThisTax:
Permission: "marketplace.tax.[CustomName]
// Taxes would be calculated on percentages
TaxInput: #AnInteger, example 15

Discounts:
CustomNameForThisDisccount:
Permission: "marketplace.disccount.[CustomName]
// The discount would be calculated in percentages
TaxInput: #AnInteger, example 5

Example of tax permissions: marketplace.tax. [CustomName]
Discount permissions example: marketplace.disscount. [CustomName]

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