pay up implementation

static/apiWrapper.js

@@ -100,13 +100,13 @@ let _api = {
 		// Handle the response
 		if (!response.ok) {
 			_testPageFail(response.statusText);
-			return;
+			return -1;
 		}
 		const result = await response.json();
 		// Handle the result, was json valid?
 		if (!result) {
 			_testPageFail('Invalid JSON response');
-			return;
+			return -1;
 		}
 
 		return result;