add support for isOneTimePurchaseSupported

Author: rdy

README.md

@@ -322,6 +322,16 @@ InAppBilling.updateSubscription(['subscription.p1m', 'subscription.p3m'], 'subsc
 InAppBilling.isPurchased('your.inapp.productid').then(...);
 ```
 
+### isOneTimePurchaseSupported()
+
+##### Returns:
+
+* **oneTimePurchaseSupported:** Boolean
+
+```javascript
+InAppBilling.isOneTimePurchaseSupported().then(...);
+```
+
 ### listOwnedProducts()
 
 ##### Returns:

android/src/main/java/com/idehub/Billing/InAppBillingBridge.java

@@ -218,6 +218,16 @@ public void isPurchased(final String productId, final Promise promise){
         }
     }
 
+    @ReactMethod
+    public void isOneTimePurchaseSupported(final Promise promise){
+        if (bp != null) {
+            boolean oneTimePurchaseSupported = bp.isOneTimePurchaseSupported();
+            promise.resolve(oneTimePurchaseSupported);
+        } else {
+            promise.reject("EUNSPECIFIED", "Channel is not opened. Call open() on InAppBilling.");
+        }
+    }
+
     @ReactMethod
     public void listOwnedProducts(final Promise promise){
         if (bp != null) {

index.js

@@ -40,6 +40,10 @@ class InAppBilling {
     return InAppBillingBridge.isPurchased(productId);
   }
 
+  static isOneTimePurchaseSupported() {
+    return InAppBillingBridge.isOneTimePurchaseSupported();
+  }
+
   static listOwnedProducts() {
     return InAppBillingBridge.listOwnedProducts();
   }