> ## Documentation Index
> Fetch the complete documentation index at: https://thrackle.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Fees Invariants

###### Note: Not implemented, todo

## FeesFacet Invariants

* Only a ruleAdmin can activate a set fee activation
* Any account can retrieve the fee activation
* Only the owning handler can add a fee
* When adding a fee, the minBalance

## Fees Invariants

* A non Rule Admin can never add a fee
* A non Rule Admin can never remove a fee
* A non Rule Admin can never propose a new owner
* Any user can getApplicableFees.
* When adding a fee, minimum balance can never be more than maximum balance
* When adding a fee, fee percentage can never be greater than 10000 or less than -10000
* When adding a fee, fee percentage can never be 0
* When adding a fee, target account can never be a zero address when the feePercentage is positive
* When adding a fee, maxBalance will be max uint256 when maxBalance is sent in as 0
* When removing an existing fee, fee total will decrement by 1
* When removing an existing fee, FeeType event is emitted
* When attempting to remove a non existent fee, FeeType event is not emitted
* Can never propose zero address as the new owner