Analyse de l'IPN (URL de notification)

I. Prérequis : restrictions serveur marchand

Vous devez autoriser la plage d'adresses IP 194.50.38.0/24, port par défaut 443 (HTTPS) sur votre serveur.

Lien pour le paramètrage de l'IPN.

II. Les données transmises

Paramètre	Description	Valeur
kr-hash	Hash de l'objet JSON stocké dans kr-answer. Il permet de vérifier l'authenticité de la réponse.	Ex: c3c0323c748fdb7c2d24bd39ada99663526236828efa795193bebfdea022fe58
kr-hash-algorithm	Algorithme utilisé pour calculer le hash.	Sa valeur est sha256_hmac
kr-hash-key	Clé HMAC-SHA-256 (2 ème clé du tableau des clés API REST ). Clé utilisée pour signer kr-answer.	password (cas IPN).
kr-answer-type	Type de l'objet JSON contenu dans kr-answer.	Ex : V4/Payment
kr-answer	Objet contenant le résultat du paiement, encodé en JSON.	Ex : {"shopId":"42229744","orderCycle":"CLOSED","orderStatus":"PAID", (...)

III. Vérifier l'authenticité de l'IPN

Vous devez vérifier l'authenticité des données reçues.

Chiffrez le kr-answer reçu en utilisant la fonction hash_hmac
- Algorithme de chiffrement : sha256
- Clé secrète : le mot de passe qui commence par testpassword** ou prodpassword** (2ème clé du tableau des clés API REST ).
- Base d'encodage : héxadécimale (base 16).
Vérifiez l'authenticité du message reçu
- si le kr-hash est égal au chiffrement du kr-answer alors le message est authentique.
Exemple de code du fichier d'exemple : ipn.php

    
    // STEP 1 : check the signature with the password
    if (!checkHash($_POST, PASSWORD)) {
        echo 'Invalid signature. <br/>';
        echo '<pre>&#039; . print_r($_POST, true) . &#039;</pre>';
        die();
    }
    
    $answer = array();
    $answer['kr-hash'] = $_POST['kr-hash'];
    $answer['kr-hash-algorithm'] = $_POST['kr-hash-algorithm'];
    $answer['kr-answer-type'] = $_POST['kr-answer-type'];
    $answer['kr-answer'] = json_decode($_POST['kr-answer'], true);
    
    // STEP 2 : function to check the signature
    function checkHash($data, $key){
        $supported_sign_algos = array('sha256_hmac');
        if (!in_array($data['kr-hash-algorithm'], $supported_sign_algos)) {
            return false;
        }
        $kr_answer = str_replace('\/', '/', $data['kr-answer']);
        $hash = hash_hmac('sha256', $kr_answer, $key);
        return ($hash == $data['kr-hash']);
    }

IV. Vérifier le statut de la transaction

Vérifiez le paramètre orderStatus contenu dans kr-answer.
La valeur PAID du champ orderStatus signifie que la transaction a été acceptée.

Plus d'infos : Cycle de vie d'une transaction

Exemple de kr-answer :

{
  "shopId": "42229744",
  "orderCycle": "CLOSED",
  "orderStatus": "PAID",
  "serverDate": "2022-01-21T09:28:17+00:00",
  "orderDetails": {
    "orderTotalAmount": 990,
    "orderEffectiveAmount": 990,
    "orderCurrency": "EUR",
    "mode": "TEST",
    "orderId": "myOrderId-475882",
    "metadata": null,
    "_type": "V4/OrderDetails"
  },
  "customer": {
    "billingDetails": {
      "address": null,
      "category": null,
      "cellPhoneNumber": null,
      "city": null,
      "country": null,
      "district": null,
      "firstName": null,
      "identityCode": null,
      "language": "FR",
      "lastName": null,
      "phoneNumber": null,
      "state": null,
      "streetNumber": null,
      "title": null,
      "zipCode": null,
      "legalName": null,
      "_type": "V4/Customer/BillingDetails"
    },
    "email": "sample@example.com",
    "reference": null,
    "shippingDetails": {
      "address": null,
      "address2": null,
      "category": null,
      "city": null,
      "country": null,
      "deliveryCompanyName": null,
      "district": null,
      "firstName": null,
      "identityCode": null,
      "lastName": null,
      "legalName": null,
      "phoneNumber": null,
      "shippingMethod": null,
      "shippingSpeed": null,
      "state": null,
      "streetNumber": null,
      "zipCode": null,
      "_type": "V4/Customer/ShippingDetails"
    },
    "extraDetails": {
      "browserAccept": null,
      "fingerPrintId": null,
      "ipAddress": "185.244.73.2",
      "browserUserAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36",
      "_type": "V4/Customer/ExtraDetails"
    },
    "shoppingCart": {
      "insuranceAmount": null,
      "shippingAmount": null,
      "taxAmount": null,
      "cartItemInfo": null,
      "_type": "V4/Customer/ShoppingCart"
    },
    "_type": "V4/Customer/Customer"
  },
  "transactions": [
    {
      "shopId": "42229744",
      "uuid": "1c8356b0e24442b2acc579cf1ae4d814",
      "amount": 990,
      "currency": "EUR",
      "paymentMethodType": "CARD",
      "paymentMethodToken": null,
      "status": "PAID",
      "detailedStatus": "AUTHORISED",
      "operationType": "DEBIT",
      "effectiveStrongAuthentication": "ENABLED",
      "creationDate": "2022-01-21T09:28:16+00:00",
      "errorCode": null,
      "errorMessage": null,
      "detailedErrorCode": null,
      "detailedErrorMessage": null,
      "metadata": null,
      "transactionDetails": {
        "liabilityShift": "YES",
        "effectiveAmount": 990,
        "effectiveCurrency": "EUR",
        "creationContext": "CHARGE",
        "cardDetails": {
          "paymentSource": "EC",
          "manualValidation": "NO",
          "expectedCaptureDate": "2022-01-27T09:38:10+00:00",
          "effectiveBrand": "VISA",
          "pan": "497011XXXXXX1003",
          "expiryMonth": 12,
          "expiryYear": 2025,
          "country": "FR",
          "issuerCode": 17807,
          "issuerName": "Banque Populaire Occitane",
          "effectiveProductCode": null,
          "legacyTransId": "929936",
          "legacyTransDate": "2022-01-21T09:28:16+00:00",
          "paymentMethodSource": "NEW",
          "authorizationResponse": {
            "amount": 990,
            "currency": "EUR",
            "authorizationDate": "2022-01-21T09:28:16+00:00",
            "authorizationNumber": "3fe205",
            "authorizationResult": "0",
            "authorizationMode": "FULL",
            "_type": "V4/PaymentMethod/Details/Cards/CardAuthorizationResponse"
          },
          "captureResponse": {
            "refundAmount": null,
            "refundCurrency": null,
            "captureDate": null,
            "captureFileNumber": null,
            "effectiveRefundAmount": null,
            "effectiveRefundCurrency": null,
            "_type": "V4/PaymentMethod/Details/Cards/CardCaptureResponse"
          },
          "threeDSResponse": {
            "authenticationResultData": {
              "transactionCondition": null,
              "enrolled": null,
              "status": null,
              "eci": null,
              "xid": null,
              "cavvAlgorithm": null,
              "cavv": null,
              "signValid": null,
              "brand": null,
              "_type": "V4/PaymentMethod/Details/Cards/CardAuthenticationResponse"
            },
            "_type": "V4/PaymentMethod/Details/Cards/ThreeDSResponse"
          },
          "authenticationResponse": {
            "id": "30eaa40d-dd76-4617-b527-4bed6240b81c",
            "operationSessionId": "ae6f2ad3ffea41bb8faf1aefabad87b9",
            "protocol": {
              "name": "THREEDS",
              "version": "2.1.0",
              "network": "VISA",
              "challengePreference": "NO_PREFERENCE",
              "simulation": true,
              "_type": "V4/Charge/Authenticate/Protocol"
            },
            "value": {
              "authenticationType": "CHALLENGE",
              "authenticationId": {
                "authenticationIdType": "dsTransId",
                "value": "bafdb21f-e3d6-4d1c-b4f6-d1668b7f7f21",
                "_type": "V4/Charge/Authenticate/AuthenticationId"
              },
              "authenticationValue": {
                "authenticationValueType": "CAVV",
                "value": "BqLgDBHYRaCBpip3Fn3+erKT9vg=",
                "_type": "V4/Charge/Authenticate/AuthenticationValue"
              },
              "status": "SUCCESS",
              "commerceIndicator": "05",
              "extension": {
                "authenticationType": "THREEDS_V2",
                "threeDSServerTransID": "30eaa40d-dd76-4617-b527-4bed6240b81c",
                "dsTransID": "bafdb21f-e3d6-4d1c-b4f6-d1668b7f7f21",
                "acsTransID": "bd6e58b4-6f37-4993-b428-9096766d83a6",
                "_type": "V4/Charge/Authenticate/AuthenticationResultExtensionThreedsV2"
              },
              "reason": {
                "_type": "V4/Charge/Authenticate/AuthenticationResultReason"
              },
              "_type": "V4/Charge/Authenticate/AuthenticationResult"
            },
            "_type": "V4/AuthenticationResponseData"
          },
          "installmentNumber": null,
          "installmentCode": null,
          "markAuthorizationResponse": {
            "amount": null,
            "currency": null,
            "authorizationDate": null,
            "authorizationNumber": null,
            "authorizationResult": null,
            "_type": "V4/PaymentMethod/Details/Cards/MarkAuthorizationResponse"
          },
          "cardHolderName": null,
          "identityDocumentNumber": null,
          "identityDocumentType": null,
          "_type": "V4/PaymentMethod/Details/CardDetails"
        },
        "fraudManagement": {
          "_type": "V4/PaymentMethod/Details/FraudManagement"
        },
        "subscriptionDetails": {
          "subscriptionId": null,
          "_type": "V4/PaymentMethod/Details/SubscriptionDetails"
        },
        "parentTransactionUuid": null,
        "mid": "9999999",
        "sequenceNumber": 1,
        "taxAmount": null,
        "preTaxAmount": null,
        "taxRate": null,
        "externalTransactionId": null,
        "nsu": null,
        "tid": "001",
        "acquirerNetwork": "CB",
        "taxRefundAmount": null,
        "userInfo": "JS Client",
        "paymentMethodTokenPreviouslyRegistered": null,
        "occurrenceType": "UNITAIRE",
        "_type": "V4/TransactionDetails"
      },
      "_type": "V4/PaymentTransaction"
    }
  ],
  "subMerchantDetails": null,
  "_type": "V4/Payment"
}

V. Rejeu de l'IPN

En cas d'échec, un mécanisme de rejeu automatique se configure lors du paramétrage de l'IPN : lien.

Si vous activez le rejeu, la plateforme renvoie automatiquement l'IPN en cas d'échec, tous les 15 minutes, et ce, jusqu'à 4 fois.

Si vous ne souhaitez pas attendre ce délai, utilisez le Web Service Order/Get pour retrouver la liste des transactions associées à une référence commande (orderId). Il est recommandé :

Limiter un appel par minute.
Attendre une réponse avant le prochain appel.