I’m trying to apply coupon using darryldecode library

public function applyDiscount(Request $request)
{

    $condition = new DarryldecodeCartCartCondition(array(
        'name' => 'voucher',
        'type' => 'discount',
        'target' => 'subtotal', 
        'value' => '12.5%',
    ));
    Cart::condition($condition);
}

but still total amount is same.

reference:

https://packagist.org/packages/darryldecode/cart

https://github.com/darryldecode/laravelshoppingcart/blob/master/tests/CartConditionsTest.php

any solution Thanks