fix: check api key before returning easybill client instance

gastromatic · Oct 5, 2021 · 0dc63dc · 0dc63dc
1 parent be499e5
commit 0dc63dc
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/index.ts b/src/index.ts
@@ -4,13 +4,16 @@ import { DocumentAPI } from './document/api';
 export class EasybillClient {
   private static instance: EasybillClient;
 
+  private apiKey: string;
+
   public readonly customerAPI: CustomerAPI;
 
   public readonly documentAPI: DocumentAPI;
 
   private constructor(apiKey: string) {
     const baseURL = 'https://api.easybill.de/rest/v1';
 
+    this.apiKey = apiKey;
     this.customerAPI = new CustomerAPI(baseURL, apiKey);
     this.documentAPI = new DocumentAPI(baseURL, apiKey);
   }
@@ -19,6 +22,9 @@ export class EasybillClient {
     if (!EasybillClient.instance) {
       EasybillClient.instance = new EasybillClient(apiKey);
     }
+    if (EasybillClient.instance.apiKey !== apiKey) {
+      throw new Error('Easybill client cannot have different api keys');
+    }
     return EasybillClient.instance;
   }
 }