Receiving and understanding messages

Request

Sample header

Accept: application/json
X-PURCHASELY-REQUEST-SIGNATURE: 506c1...44a180
X-PURCHASELY-TIMESTAMP: 1698322022

To ensure that events are indeed coming from Purchasely Cloud Platform, you can authentify these events using informations contained in the HEADER of the HTTP request :

  • X-PURCHASELY-REQUEST-SIGNATURE : request signature

  • X-PURCHASELY-TIMESTAMP : request timestamp

This verification is optional.

The signature relies on a shared secret that you can find in your Purchasely Console (Client shared secret) Purchasely Console > Settings > Webhooks

Sample codes for signature verification:

const crypto = require("crypto");

// Request headers
// ---------------
const xPurchaselyRequestSignature = "f3c2a452e9ea72f41107321aeaf7999f1054148866a710c9b23f9f501785e2a4";
const xPurchaselyTimestamp = "1698322022";

// Request body
// ------------
const body = "{\"a_random_key\":\"a_random_value_ad\"}";

// Signature verification
// ----------------------
const webhookSharedSecret = "foobar";
const dataToSign = xPurchaselyTimestamp + body;
const computedSignature = crypto
                          .createHmac("sha256", webhookSharedSecret)
                          .update(dataToSign)
                          .digest("hex");

if (computedSignature === xPurchaselySignature) {
  // request authenticated
}

You can also compute the difference between the current timestamp and the received timestamp, then decide if the difference is within your tolerance.

Body

Sample body

{
  "plan": "my_sub_monthly",
  "store": "APPLE_APP_STORE",
  "product": "my_product",
  "event_id": "de3f1e90-28bd-4cf1-9fe7-992fb62811a0",
  "placement": "onboarding",
  "event_name": "SUBSCRIPTION_TRANSFERRED",
  "offer_type": "NONE",
  "api_version": 3,
  "environment": "SANDBOX",
  "presentation": "mailys_paywall",
  "purchased_at": "2022-08-24T09:59:24.000Z",
  "purchase_type": "RENEWING_SUBSCRIPTION",
  "store_country": "FR",
  "next_renewal_at": "2022-08-24T10:04:24.000Z",
  "purchased_at_ms": 1661335164000,
  "event_created_at": "2022-08-24T10:00:18.794Z",
  "is_family_shared": false,
  "store_product_id": "com.purchasely.plus.monthly",
  "anonymous_user_id": "6837C35A-949B-4489-B212-62F66ACA6CC2",
  "customer_currency": "EUR",
  "plan_price_in_usd": 83.71,
  "next_renewal_at_ms": 1661335464000,
  "event_created_at_ms": 1661335218794,
  "previous_offer_type": "NONE",
  "store_app_bundle_id": "com.purchasely.demo",
  "subscription_status": "DEACTIVATED",
  "store_transaction_id": "2000000137582598",
  "original_purchased_at": "2021-10-13T15:09:25.000Z",
  "transferred_to_user_id": "jeff",
  "original_purchased_at_ms": 1634137765000,
  "effective_next_renewal_at": "2022-08-24T10:04:24.000Z",
  "purchasely_subscription_id": "subs_gxAHaBBV6jftATvWf8D1p1kkSSH2yiz",
  "effective_next_renewal_at_ms": 1661335464000,
  "store_original_transaction_id": "1000000892047818",
  "plan_price_in_customer_currency": 83.99
}

More information on these properties can be found here:

Response

When called by Purchasely Cloud Platform, client backend should respond with a HTTP code :

  • HTTP 200 ⇒ the Event has been well received and processed (eg: the subscription has been activated/deactivated)\

  • Other than HTTP 200 or no response (timeout) ⇒ an error has occurred and the Event could not be processed :

    • The user is warned through the SDK that something did not work\

    • Purchasely Cloud Platform will retry several times to send the Event (max 25 times) in the following hours.

This response from the client backend to the Purchasely Console is mandatory, particularly for purchase events (e.g. new subscriptions) coming from the SDK, to ensure that the client backend has granted the user with the entitlements corresponding to the new purchase, and unlocked the access to the premium contents or features.

This response from the client backend is forwarded to the mobile SDK and an error message is displayed to the user, if it is different from HTTP 200.

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