(Objective-C) Paynow.pl -- Make a Payment Request

Make a payment request POST with prepared message on Paynow payment request endpoint.

For more information, see https://docs.paynow.pl/#section/Payments/Make-a-payment

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoHttp.h>
#import <CkoJsonObject.h>
#import <NSString.h>
#import <CkoCrypt2.h>
#import <CkoHttpResponse.h>

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoHttp *http = [[CkoHttp alloc] init];
BOOL success;

// Implements the following CURL command:

// curl --request POST 'https://api.sandbox.paynow.pl/v1/payments' \
// -H 'Content-Type: application/json' \
// -H 'Api-Key: c12c386b-650b-43db-9430-d84fc05d9433' \
// -H 'Signature: aYPCytCoc+/wFgqHZJjgBCi20omXTn0yzm9LysJgnFo=' \
// -H 'Idempotency-Key: 59c6dd26-f905-487b-96c9-fd1d2bd76885' \
// --data-raw '{
//     "amount": 45671,
//     "externalId": "234567898654",
//     "description": "Test transaction",
//     "buyer": {
//         "email": "jan.kowalski@melements.pl"
//     }
// }'

// Use the following online tool to generate HTTP code from a CURL command
// Convert a cURL Command to HTTP Source Code

// Use this online tool to generate code from sample JSON:
// Generate Code to Create JSON

// The following JSON is sent in the request body.

// {
//   "amount": 45671,
//   "externalId": "234567898654",
//   "description": "Test transaction",
//   "buyer": {
//     "email": "jan.kowalski@melements.pl"
//   }
// }

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateInt: @"amount" value: [NSNumber numberWithInt: 45671]];
[json UpdateString: @"externalId" value: @"234567898654"];
[json UpdateString: @"description" value: @"Test transaction"];
[json UpdateString: @"buyer.email" value: @"jan.kowalski@melements.pl"];

NSString *myApiAccessKey = @"c12c386b-650b-43db-9430-d84fc05d9433";
NSString *mySigCalcKey = @"b758f20d-ba92-44fa-acca-f57e99787b9d";

// Calculate the Signature header.
CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init];
crypt.MacAlgorithm = @"hmac";
crypt.EncodingMode = @"base64";
[crypt SetMacKeyString: mySigCalcKey];
crypt.HashAlgorithm = @"SHA-256";
NSString *messageBody = [json Emit];
NSString *signature = [crypt MacStringENC: messageBody];

[http SetRequestHeader: @"Idempotency-Key" value: [crypt GenerateUuid]];
[http SetRequestHeader: @"Api-Key" value: myApiAccessKey];
[http SetRequestHeader: @"Signature" value: signature];
[http SetRequestHeader: @"Content-Type" value: @"application/json"];
http.Accept = @"application/json";

CkoHttpResponse *resp = [http PostJson3: @"https://api.sandbox.paynow.pl/v1/payments" contentType: @"application/json" json: json];
if (http.LastMethodSuccess == NO) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

NSLog(@"%@",@"Response body:");
NSLog(@"%@",resp.BodyStr);

// Sample response:
// {
//   "redirectUrl": "https://paywall.sandbox.paynow.pl/NOA0-YJ9-Y1P-29V?token=eyJraWQiOiJhMD ... L60wk",
//   "paymentId": "NOA0-YJ9-Y1P-29V",
//   "status": "NEW"
// }

CkoJsonObject *jsonResp = [[CkoJsonObject alloc] init];
[jsonResp Load: resp.BodyStr];
NSString *redirectUrl = [json StringOf: @"redirectUrl"];
NSString *paymentId = [json StringOf: @"paymentId"];
NSString *status = [json StringOf: @"status"];