Inconsistent use of checks-effects-interactions (CEI) pattern in _processPayment

In _processPayment, there is a CEI issue. The current version updates state (remaining -= feeAmount) after the external call:

if (feeAmount > 0) {
    (bool sentFee, ) = platformTreasury.call{value: feeAmount}("");
    require(sentFee, "Failed to send platform fee");
    remaining -= feeAmount;
}

In the _processPayment function, the suggested solution is to move the remaining -= feeAmount line before the external call.

Best-practice deviation; while the contract's existing reentrancy guards mitigate the risk in current call paths, the ordering should be corrected to keep the CEI discipline intact for future maintainers and any path that may bypass the guard.

Reorder so that the state update is applied before the external call:

if (feeAmount > 0) {
    remaining -= feeAmount;
    (bool sentFee, ) = platformTreasury.call{value: feeAmount}("");
    require(sentFee, "Failed to send platform fee");
}

Ipal Network: Confirmed. We agreed with the recommendation to adhere strictly to the checks-effects-interactions pattern.

Zealynx: Not Fixed: The CEI pattern violation remains. State updates (remaining -= feeAmount) still occur after external calls, which goes against the recommended checks-effects-interactions pattern for security best practices.

UPDATE: Fixed.