Dart

Paynow.pl -- Make a Payment Request

See more Paynow.pl Examples

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

import 'package:chilkat/chilkat.dart';

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

  final http = CkHttp();

  // 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"
  //   }
  // }

  final json = CkJsonObject();
  json.updateInt('amount', 45671);
  json.updateString('externalId', '234567898654');
  json.updateString('description', 'Test transaction');
  json.updateString('buyer.email', 'jan.kowalski@melements.pl');

  final myApiAccessKey = 'c12c386b-650b-43db-9430-d84fc05d9433';
  final mySigCalcKey = 'b758f20d-ba92-44fa-acca-f57e99787b9d';

  // Calculate the Signature header.
  final crypt = CkCrypt2();
  crypt.macAlgorithm = 'hmac';
  crypt.encodingMode = 'base64';
  crypt.setMacKeyString(mySigCalcKey);
  crypt.hashAlgorithm = 'SHA-256';
  final messageBody = json.emit();
  final signature = crypt.macStringENC(messageBody);

  http.setRequestHeader('Idempotency-Key', crypt.generateUuid());
  http.setRequestHeader('Api-Key', myApiAccessKey);
  http.setRequestHeader('Signature', signature);
  http.setRequestHeader('Content-Type', 'application/json');
  http.accept = 'application/json';

  final resp = CkHttpResponse();
  try {
    http.httpJson('POST', 'https://api.sandbox.paynow.pl/v1/payments', json, 'application/json', resp);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Response body:');
  print(resp.bodyStr);

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

  final jsonResp = CkJsonObject();
  jsonResp.load(resp.bodyStr);
  final redirectUrl = json.stringOf('redirectUrl');
  final paymentId = json.stringOf('paymentId');
  final status = json.stringOf('status');
}