chore: Adding mainFn helpers

lib/mainFn/NetworkInterfaceBuilder.ts

@@ -0,0 +1,38 @@
+import { Effects } from "../types";
+import { AddressReceipt } from "./AddressReceipt";
+import { Origin } from "./Origin";
+
+export class NetworkInterfaceBuilder {
+  constructor(
+    readonly options: {
+      effects: Effects;
+      name: string;
+      id: string;
+      description: string;
+      ui: boolean;
+      basic?: null | { password: string; username: string };
+      path?: string;
+      search?: Record<string, string>;
+    }
+  ) {}
+
+  async exportAddresses(addresses: Iterable<Origin>) {
+    const { name, description, id, ui, path, search } = this.options;
+    // prettier-ignore
+    const urlAuth = !!(this.options?.basic) ? `${this.options.basic.username}:${this.options.basic.password}@` :
+            '';
+    for (const origin of addresses) {
+      const address = `${origin.protocol}://${urlAuth}${origin.address}`;
+      await this.options.effects.exportAddress({
+        name,
+        description,
+        address,
+        id,
+        ui,
+        path,
+        search,
+      });
+    }
+    return {} as AddressReceipt;
+  }
+}