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Payment


User Model

Add the CanBePaid trait and Customer interface to your User model.

use Bavix\Wallet\Traits\CanBePaid;
use Bavix\Wallet\Interfaces\Customer;

class User extends Model implements Customer
{
    use CanBePaid;
}

Item Model

Add the HasWallet trait and Product interface to Item model.

use Bavix\Wallet\Traits\HasWallet;
use Bavix\Wallet\Interfaces\Product;

class Item extends Model implements Product
{
    use HasWallet;

    public function canBuy(Customer $customer, bool $force = false): bool
    {
        /**
         * If the service can be purchased once, then
         *  return !$customer->paid($this);
         */
        return true; 
    }

    public function getAmountProduct(): int
    {
        return 100;
    }

    public function getMetaProduct(): ?array
    {
        return [
            'title' => $this->title, 
            'description' => 'Purchase of Product #' . $this->id, 
            'price' => $this->getAmountProduct(),
        ];
    }
}

Proceed to purchase

Find the user and check the balance.

$user = User::first();
$user->balance; // int(100)

Find the goods and check the cost.

$item = Item::first();
$item->getAmountProduct(); // int(100)

The user can buy a product, buy...

$user->pay($item);
$user->balance; // int(0)

What happens if the user does not have the funds? The same as with the withdrawal.

$user->balance; // int(0)
$user->pay($item);
// throw an exception

The question arises, how do you know that the product is purchased?

(bool)$user->paid($item); // bool(true)

Safe Pay

To not write try and catch use safePay method.

if ($user->safePay($item)) {
  // try to buy again )
}

It worked!