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<?php |
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namespace Loevgaard\Dandomain\Pay\Helper; |
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use Loevgaard\Dandomain\Pay\Model\Payment; |
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/** |
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* The checksum helper will assist in creating checksums and also verifying checksums based on a payment |
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*/ |
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class ChecksumHelper |
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{ |
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/** |
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* @var string |
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*/ |
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protected $sharedKey1; |
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/** |
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* @var string |
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*/ |
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protected $sharedKey2; |
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/** |
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* @var string |
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*/ |
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protected $checksum1; |
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/** |
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* @var string |
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*/ |
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protected $checksum2; |
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/** |
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* @var Payment |
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*/ |
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protected $payment; |
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public function __construct(Payment $payment, string $sharedKey1, string $sharedKey2) |
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{ |
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$this->payment = $payment; |
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$this->sharedKey1 = $sharedKey1; |
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$this->sharedKey2 = $sharedKey2; |
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} |
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/** |
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* Returns true if the checksum given from Dandomain matches the checksum we can compute. |
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* |
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* @return bool |
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*/ |
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public function checksumMatches(): bool |
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{ |
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return $this->payment->getApiKey() === $this->getChecksum1(); |
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} |
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/** |
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* @return string |
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*/ |
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public function getChecksum1() |
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{ |
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if (!$this->checksum1) { |
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$this->checksum1 = static::generateChecksum1( |
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$this->payment->getOrderId(), |
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$this->payment->getTotalAmount(), |
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$this->sharedKey1, |
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$this->payment->getPaymentGatewayCurrencyCode() |
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); |
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} |
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return $this->checksum1; |
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} |
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/** |
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* @return string |
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*/ |
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public function getChecksum2() |
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{ |
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if (!$this->checksum2) { |
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$this->checksum2 = static::generateChecksum2( |
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$this->payment->getOrderId(), |
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$this->sharedKey2, |
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$this->payment->getPaymentGatewayCurrencyCode() |
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); |
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} |
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return $this->checksum2; |
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} |
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/** |
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* @param int $orderId |
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* @param float $amount |
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* @param string $sharedKey |
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* @param int $currency |
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* |
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* @return string |
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*/ |
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public static function generateChecksum1(int $orderId, float $amount, string $sharedKey, int $currency): string |
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{ |
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// the amount needs to be formatted as a danish number, so we convert the float |
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$amount = number_format($amount, 2, ',', ''); |
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return strtolower(md5($orderId.'+'.$amount.'+'.$sharedKey.'+'.$currency)); |
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} |
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/** |
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* Dandomain has a bug in their payment implementation where they don't |
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* include amount in checksum on their complete/success page. |
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* That is why we have a second method for computing that checksum. |
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* |
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* @param int $orderId |
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* @param string $sharedKey |
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* @param int $currency |
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* |
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* @return string |
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*/ |
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public static function generateChecksum2(int $orderId, string $sharedKey, int $currency): string |
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{ |
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return strtolower(md5($orderId.'+'.$sharedKey.'+'.$currency)); |
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} |
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} |
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loevgaard /
dandomain-pay-php-sdk
