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<?php |
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namespace KS; |
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/** |
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* Inspired and code logic from https://github.com/dtinth/promptpay-qr |
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* More information https://www.blognone.com/node/95133 |
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*/ |
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class PromptPay { |
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11
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const ID_PAYLOAD_FORMAT = '00'; |
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const ID_POI_METHOD = '01'; |
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const ID_MERCHANT_INFORMATION_BOT = '29'; |
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const ID_TRANSACTION_CURRENCY = '53'; |
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const ID_TRANSACTION_AMOUNT = '54'; |
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const ID_COUNTRY_CODE = '58'; |
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const ID_CRC = '63'; |
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const PAYLOAD_FORMAT_EMV_QRCPS_MERCHANT_PRESENTED_MODE = '01'; |
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const POI_METHOD_STATIC = '11'; |
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const POI_METHOD_DYNAMIC = '12'; |
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const MERCHANT_INFORMATION_TEMPLATE_ID_GUID = '00'; |
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const BOT_ID_MERCHANT_PHONE_NUMBER = '01'; |
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const BOT_ID_MERCHANT_TAX_ID = '02'; |
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const BOT_ID_MERCHANT_EWALLET_ID = '03'; |
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const GUID_PROMPTPAY = 'A000000677010111'; |
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const TRANSACTION_CURRENCY_THB = '764'; |
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const COUNTRY_CODE_TH = 'TH'; |
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29
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30
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2 |
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public function generatePayload($target, $amount = null) { |
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2 |
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$target = $this->sanitizeTarget($target); |
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34
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$targetType = strlen($target) >= 15 ? self::BOT_ID_MERCHANT_EWALLET_ID : (strlen($target) >= 13 ? self::BOT_ID_MERCHANT_TAX_ID : self::BOT_ID_MERCHANT_PHONE_NUMBER); |
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35
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$data = [ |
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2 |
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$this->f(self::ID_PAYLOAD_FORMAT, self::PAYLOAD_FORMAT_EMV_QRCPS_MERCHANT_PRESENTED_MODE), |
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$this->f(self::ID_POI_METHOD, $amount ? self::POI_METHOD_DYNAMIC : self::POI_METHOD_STATIC), |
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$this->f(self::ID_MERCHANT_INFORMATION_BOT, $this->serialize([ |
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$this->f(self::MERCHANT_INFORMATION_TEMPLATE_ID_GUID, self::GUID_PROMPTPAY), |
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$this->f($targetType, $this->formatTarget($target)) |
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])), |
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$this->f(self::ID_COUNTRY_CODE, self::COUNTRY_CODE_TH), |
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$this->f(self::ID_TRANSACTION_CURRENCY, self::TRANSACTION_CURRENCY_THB), |
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]; |
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if ($amount !== null) { |
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array_push($data, $this->f(self::ID_TRANSACTION_AMOUNT, $this->formatAmount($amount))); |
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} |
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$dataToCrc = $this->serialize($data) . self::ID_CRC . '04'; |
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array_push($data, $this->f(self::ID_CRC, $this->crc16($dataToCrc))); |
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return $this->serialize($data); |
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} |
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public function f($id, $value) { |
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return implode('', [$id, substr('00' . strlen($value), -2), $value]); |
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} |
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public function serialize($xs) { |
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return implode('', $xs); |
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} |
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63
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public function sanitizeTarget($str) { |
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$str = preg_replace('/[^0-9]/', '', $str); |
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return $str; |
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} |
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public function formatTarget($target) { |
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$str = $this->sanitizeTarget($target); |
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if (strlen($str) >= 13) { |
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return $str; |
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} |
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$str = preg_replace('/^0/', '66', $str); |
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$str = '0000000000000' . $str; |
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return substr($str, -13); |
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} |
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public function formatAmount($amount) { |
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return number_format($amount, 2, '.', ''); |
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} |
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86
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3 |
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public function crc16($data) { |
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$crc16 = new \mermshaus\CRC\CRC16CCITT(); |
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$crc16->update($data); |
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$checksum = $crc16->finish(); |
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return strtoupper(bin2hex($checksum)); |
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} |
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93
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1 |
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public function generateQrCode($savePath, $target, $amount = null, $width = 500) { |
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95
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$payload = $this->generatePayload($target, $amount); |
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1 |
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$renderer = new \BaconQrCode\Renderer\Image\Png(); |
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$renderer->setHeight($width); |
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1 |
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$renderer->setWidth($width); |
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$renderer->setMargin(0); |
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$writer = new \BaconQrCode\Writer($renderer); |
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$writer->writeFile($payload, $savePath); |
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1 |
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} |
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105
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} |
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106
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kittinan /
php-promptpay-qr
