how to add a minimum line order value shopware 6

I would like to know if there is an option to enable a sort of minimum line value?
for exemple 1 part costs 0.06 that i enable a minimum rule of minimum 1 euro value to all items. so this would be 16/17pcs.

Hope someone knows if this can be done.

There's the minPurchase field of a product (or "Min. order quantity" within the details of a product in the administration. However this relates to the quantity of an item not the total price of all items. So in your example you'd have to set minPurchase to 17 if in the cart the line items for that product should amount to a minimum of 1 Euro.

If it is worth your time, you could do this programmatically by adding a custom field to the product where you enter the minimum monetary amount. Then subscribe to sales_channel.product.loaded and set the minPurchase field dynamically depending on the custom field value.

public function loaded(EntityLoadedEvent $event): void
{
    /** @var SalesChannelProductEntity $product */
    foreach ($event->getEntities() as $product) {
        $customFields = $product->getCustomFields();
        $minMonetaryPurchase = $customFields['min_monetary_purchase'] ?? null;

        if (!$minMonetaryPurchase) {
            continue;
        }

        $minPurchase = ceil($minMonetaryPurchase / $product->getCalculatedPrice()->getUnitPrice());
        $product->setMinPurchase((int) $minPurchase);
    }
}

You can add a cart validator, es described in the docs

You implement your own Shopware\Core\Checkout\Cart\CartValidatorInterface, register, add your own error extending Shopware\Core\Checkout\Cart\Error\Error

Register it in your services.xml

<services>
    <service id="Swag\BasicExample\Core\Checkout\Cart\Custom\CustomCartValidator">
        <tag name="shopware.cart.validator"/>
    </service>
</services>

And this way you can run through all line items/products in your cart, validate them and throw an error if one of them doesn't validate.