vgw2Fsif

1<?php
2
3namespace Tests\Feature;
4use GuzzleHttp\Client;
5
6class DemoOTPPHP
7{
8/**
9     * Test OTP Kokatto API
10     * 1. install GuzzleHttp: https://docs.guzzlephp.org/en/stable/overview.html#installation
11     * 2. create request body
12     * 3. generate HMAC signature using the request body
13     * 4. insert signature in request body
14     * 5. call OTP API
15     *
16     * @return void
17     */
18    public function testExample()
19    {
20        date_default_timezone_set("Asia/Jakarta");
21        $parameters = array(
22            'clientId' => '8002',
23            'campaignName' => 'OPM',
24            'destination' =>  '6285695744459',
25            'codeValidity' => 120,
26            'codeLength' => 6,
27            'dlrCallbackUrl' => 'https://otp.kokatto.com/callback/kokatto',
28            'timestamp' => date('Y-m-d') . 'T' . date('H:i:s') . '+0700'
29        );
30        $signature = self::generateKokattoAPISignedRequest($parameters, "72115e7b0ff10f0d712e00c743f7c535");
31        $parameters['signature'] = $signature;
32
33        $client = new Client();
34        // dev URL
35        $url = 'https://xa7wqrhvic.execute-api.ap-southeast-1.amazonaws.com/dev/otp/request';
36        $response = $client->post($url, [
37            'json' => $parameters
38        ]);
39
40    }
41
42    private static function generateKokattoAPISignedRequest($parameters, $secretKey)
43	    {
44            // construct $map like below (sorted):
45            // print
46            // [campaignName] => OPM
47            // [clientId] => 8002
48            // [codeLength] => 6
49            // [destination] => 6285695744459
50            // [timestamp] => 2021-04-22T14:37:49+07:00
51            //sort map by key
52            ksort($parameters);
53
54	        //construct map into query string
55            $query = http_build_query($parameters);
56            // print $query = campaignName=OPM&clientId=1111&codeLength=6&destination=082148893982&timestamp=2021-04-22T14%3A37%3A49+07%3A00
57
58            //md5 hash query string
59            $queryMd5 = md5($query);
60            // print generated md5 query
61
62            //generate hmac hash with sha256 method
63            $queryHmacSha256 = hash_hmac('sha256', $queryMd5, $secretKey);
64            // print generate hmac
65
66            //url encode hmac hash
67            return strtoupper(urlencode($queryHmacSha256));
68            // return encode url hmac
69            // insert the signature into request body
70
71	}
72}
73