WV9BrLsS

1// Make sure all check-out headers are in alphabetical order and
2    // all header keys must be in lower case
3    // if request contains body - it should be valid JSON and content-type header should be included
4    Map<String, String> headersMap = new TreeMap<>();
5    headersMap.put("checkout-account", "375917");
6    headersMap.put("checkout-algorithm", "sha256");
7    headersMap.put("checkout-method", "POST");
8    headersMap.put("checkout-nonce", String.valueOf(UUID.randomUUID()));  // unique identifier for this request
9    headersMap.put("checkout-timestamp", ZonedDateTime.now( ZoneOffset.UTC ).format( DateTimeFormatter.ISO_INSTANT )); // ISO 8601 format date time
10
11    /**
12     * All API calls need to be signed using HMAC and SHA-256 or SHA-512
13     */
14    String headers[] = new String[headersMap.size()];
15
16    int index = 0;
17    for(Map.Entry<String, String> headersEntry: headersMap.entrySet()){
18        headers[index++] = headersEntry.getKey()+":"+headersEntry.getValue();
19    }
20
21    Map<String, Object> requestBody = new HashMap<>();
22    requestBody.put("stamp", "29858472952");
23    requestBody.put("reference", "9187445");
24    requestBody.put("amount", 1500);
25    requestBody.put("currency", "EUR");
26    requestBody.put("language", "FI");
27    List<List<Map<String, Object>>> itemsList = new ArrayList<>();
28    List<Map<String, Object>> item = new ArrayList<>();
29    Map<String, Object> itemObj = new HashMap<>();
30    itemObj.put("unitPrice", 1500);
31    itemObj.put("units",1);
32    itemObj.put("vatPercentage", 5);
33    itemObj.put("productCode", "#1234");
34    itemObj.put("deliveryDate", "2018-09-01");
35    item.add(itemObj);
36    itemsList.add(item);
37    requestBody.put("items", itemsList);
38    Map<String, Object> customer = new HashMap<>();
39    customer.put("email", "test.customer@example.com");
40    requestBody.put("customer", customer);
41    Map<String, Object> redirectUrls = new HashMap<>();
42    redirectUrls.put("success","localhost.copart.com:8080");
43    redirectUrls.put("cancel","localhost.copart.com:8080");
44    requestBody.put("redirectUrls",redirectUrls);
45
46    String body = new ObjectMapper().writeValueAsString(requestBody);
47
48    String data = String.join("n", ArrayUtils.addAll(headers, body));
49
50    String hmacSha256Hash = calculateHmacSha256("SAIPPUAKAUPPIAS", data);
51
52    if(hmacSha256Hash != null){
53        headersMap.put("content-type", "application/json; charset=utf-8");
54        headersMap.put("signature", hmacSha256Hash);
55
56        // Make network call checkout api
57     }
58	
59private String calculateHmacSha256(String key, String data){
60    String resultHash = null;
61    try {
62        Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
63        SecretKeySpec secret_key = new SecretKeySpec(key.getBytes("UTF-8"),"HmacSHA256");
64        sha256_HMAC.init(secret_key);
65
66        resultHash = Hex.encodeHexString(sha256_HMAC.doFinal(data.getBytes()));
67
68    } catch (Exception e) {
69        System.out.println("Error calculating HmacSHA256 hash for data data"+  e);
70    }
71
72    return resultHash;
73}