    function repayLoan(LoanRepaymentData calldata _repaymentData) external override nonReentrant {
        uint256 loanId = _repaymentData.data.loanId;
        Loan calldata loan = _repaymentData.loan;
        .....
@>      _baseLoanChecks(loanId, loan);
        .....
    }
    
    function _baseLoanChecks(uint256 _loanId, Loan memory _loan) private view {
        if (_loan.hash() != _loans[_loanId]) {
            revert InvalidLoanError(_loanId);
        }
        if (_loan.startTime + _loan.duration < block.timestamp) {
            revert LoanExpiredError();
        }
    }
    _loans[loanId] = loanMergedTranches.hash();
    delete _loans[_loanId];
