for testing and deploying your application
for finding and fixing issues
for empowering human code reviews
<?php
declare(strict_types=1);
namespace Damax\ChargeableApi\Wallet;
use Damax\ChargeableApi\Credit;
use MongoDB\Collection;
use MongoDB\Model\BSONDocument;
final class MongoWallet implements Wallet
{
private const FIELD_BALANCE = 'balance';
private $collection;
private $filters;
public function __construct(Collection $collection, string $identity)
$this->collection = $collection;
$this->filters = ['_id' => $identity];
}
public function balance(): Credit
$options = ['projection' => [self::FIELD_BALANCE => 1]];
/** @var BSONDocument $doc */
if (null === $doc = $this->collection->findOne($this->filters, $options)) {
return Credit::blank();
return Credit::fromInteger($doc[self::FIELD_BALANCE]);
public function deposit(Credit $credit): void
$this->collection->updateOne($this->filters, ['$inc' => [self::FIELD_BALANCE => $credit->toInteger()]], ['upsert' => true]);
public function withdraw(Credit $credit): void
$balance = $this->balance()->subtract($credit)->toInteger();
$this->collection->replaceOne($this->filters, [self::FIELD_BALANCE => $balance], ['upsert' => true]);
damax-solutions /
php-chargeable-api
