feat(context-module): new external plugin loader

need the correct implementation when the CAL
service is ready to use

libs/ledgerjs/packages/context-module/src/loaders/ExternalPluginLoader.test.ts

@@ -0,0 +1,23 @@
+import { LoaderOptions } from "../models/LoaderOptions";
+import { Transaction } from "../models/Transaction";
+import { ExternalPluginLoader } from "./ExternalPluginLoader";
+
+describe("ExternalPluginLoader", () => {
+  let loader: ExternalPluginLoader;
+  const transaction = {} as Transaction;
+
+  beforeEach(() => {
+    jest.restoreAllMocks();
+    loader = new ExternalPluginLoader();
+  });
+
+  describe("load function", () => {
+    it("should return an empty array", async () => {
+      const options = {} as LoaderOptions;
+
+      const result = await loader.load(transaction, options);
+
+      expect(result).toEqual([]);
+    });
+  });
+});

libs/ledgerjs/packages/context-module/src/loaders/ExternalPluginLoader.ts

@@ -0,0 +1,12 @@
+import { LoaderOptions } from "../models/LoaderOptions";
+import { Transaction } from "../models/Transaction";
+import { ContextLoader } from "./ContextLoader";
+
+export class ExternalPluginLoader implements ContextLoader {
+  constructor() {}
+
+  async load(_transaction: Transaction, _options: LoaderOptions) {
+    // TODO: implement the call to the CAL service when implemented
+    return Promise.resolve([]);
+  }
+}