Move from applicationUsername to appAccountToken

README.md

@@ -181,10 +181,10 @@ public class ExampleSignatureCreation {
 
         String productId = "<product_id>";
         String subscriptionOfferId = "<subscription_offer_id>";
-        String applicationUsername = "<application_username>";
+        String appAccountToken = "<app_account_token>";
         UUID nonce = UUID.randomUUID();
         long timestamp = System.currentTimeMillis();
-        String encodedSignature = signatureCreator.createSignature(productId, subscriptionOfferId, applicationUsername, nonce, timestamp);
+        String encodedSignature = signatureCreator.createSignature(productId, subscriptionOfferId, appAccountToken, nonce, timestamp);
         System.out.println(encodedSignature);
     }
 }

src/main/java/com/apple/itunes/storekit/offers/PromotionalOfferSignatureCreator.java

@@ -43,17 +43,17 @@ public PromotionalOfferSignatureCreator(String signingKey, String keyId, String
      * @see <a href="https://developer.apple.com/documentation/storekit/in-app_purchase/original_api_for_in-app_purchase/subscriptions_and_offers/generating_a_signature_for_promotional_offers">Generating a signature for promotional offers</a>
      * @param productIdentifier The subscription product identifier
      * @param subscriptionOfferID The subscription discount identifier
-     * @param applicationUsername An optional string value that you define; may be an empty string
+     * @param appAccountToken An optional string value that you define; may be an empty string
      * @param nonce A one-time UUID value that your server generates. Generate a new nonce for every signature.
      * @param timestamp A timestamp your server generates in UNIX time format, in milliseconds. The timestamp keeps the offer active for 24 hours.
      * @return The Base64 encoded signature
      */
-    public String createSignature(String productIdentifier, String subscriptionOfferID, String applicationUsername, UUID nonce, long timestamp) {
+    public String createSignature(String productIdentifier, String subscriptionOfferID, String appAccountToken, UUID nonce, long timestamp) {
         String payload = this.bundleId + '\u2063' +
                 this.keyId + '\u2063' +
                 productIdentifier + '\u2063' +
                 subscriptionOfferID + '\u2063' +
-                applicationUsername.toLowerCase()  + '\u2063'+
+                appAccountToken.toLowerCase()  + '\u2063'+
                 nonce.toString().toLowerCase() + '\u2063' +
                 timestamp;
         try {

src/test/java/com/apple/itunes/storekit/offers/PromotionalOfferSignatureCreatorTest.java

@@ -15,7 +15,7 @@ void testSignatureCreator() throws Exception {
         try (InputStream key = this.getClass().getClassLoader().getResourceAsStream("certs/testSigningKey.p8")) {
             Assertions.assertNotNull(key);
             PromotionalOfferSignatureCreator signatureCreator = new PromotionalOfferSignatureCreator(new String(key.readAllBytes()), "keyId", "bundleId");
-            String signature = signatureCreator.createSignature("productId", "offerId", "applicationUsername", UUID.fromString("20fba8a0-2b80-4a7d-a17f-85c1854727f8"), 1698148900000L);
+            String signature = signatureCreator.createSignature("productId", "offerId", "appAccountToken", UUID.fromString("20fba8a0-2b80-4a7d-a17f-85c1854727f8"), 1698148900000L);
             Assertions.assertNotNull(signature);
         }
     }