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$payload = [ 'shop_key' => '00112233-4455-6677-8899-aabbccddeeff', 'amount' => 29900, 'order_currency' => 'USD', 'payment_currency' => 'USD', 'payment_method' => 'card', 'order_number' => 'order-12345', 'payment_details' => 'Payment via order 12345', 'success_url' => 'https://example.com/success', 'fail_url' => 'https://example.com/fail', 'lang' => 'en', 'payment_account_data': [ 'email': 'email@example.com', ] ]; $api_sign = get_api_sign($payload, $secret_key); $headers = [ 'Content-Type:application/json', 'Api-sign:' . $api_sign ]; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $base_url . '/rest/paymentgate/simple/'); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_P...