CreditFilter.sol

function _fullCheck(address creditAccount) internal {
        uint256 borrowAmountPlusInterestRateUSD = priceOracle.convertToUSD(
            calcCreditAccountAccruedInterest(creditAccount),
            underlyingToken
        );

        uint256 total;
        uint256 tokenMask;
        uint256 eTokens = enabledTokens[creditAccount];
        uint256 len = allowedTokens.length;

        for (uint256 i = 0; i < len; ) {
            tokenMask = 1 << i; // T:[CF-18]
            if (eTokens & tokenMask > 0) {
                address token = allowedTokens[i];
                uint256 balance = IERC20(token).balanceOf(creditAccount); // T:[CF-28]

                // balance ==0 : T: [CF-28]
                if (balance > 1) {
                    total +=
                        priceOracle.convertToUSD(balance, token) *
                        liquidationThresholds[token]; // T:[CF-28]
                } else {
                    _checkAndDisableToken(creditAccount, token);
                }

                if (total > borrowAmountPlusInterestRateUSD) break;
            }
            unchecked {
                i++;
            }
        } // T:[CF-18]

        // Require Hf > 1
        require(
            total >= borrowAmountPlusInterestRateUSD,
            Errors.CF_OPERATION_LOW_HEALTH_FACTOR
        ); // T:[CF-25, 33, 34]
        fastCheckCounter[creditAccount] = 1; // T:[CF-34]
    }