[FMR-04C] Loop Iterator Optimizations

[vm06007]

FMR-04C: Loop Iterator Optimizations

Type	Severity	Location
Gas Optimization		FeeManager.sol:L160, L299, L369, L395, L416, L688

Description:

The linked for loops increment / decrement their iterator "safely" due to Solidity's built - in safe arithmetics (post-0.8.X).

Example:

for (uint8 i = 0; i < getPoolTokenAddressesLength(); ++i) {

Recommendation:

We advise the increment / decrement operations to be performed in an unchecked code block as the last statement within each for loop to optimize their execution cost.

[vm06007]

Should be addressed as part of: https://github.com/wise-foundation/lending-audit/pull/51