chore: Adding mainFn helpers

lib/mainFn/TorHostname.ts

@@ -0,0 +1,14 @@
+import { Effects } from "../types";
+import { TorBinding } from "./TorBinding";
+
+export class TorHostname {
+  constructor(readonly id: string, readonly effects: Effects) {}
+  async bindTor(internalPort: number, externalPort: number) {
+    const address = await this.effects.bindTor({
+      internalPort,
+      name: this.id,
+      externalPort,
+    });
+    return new TorBinding(address);
+  }
+}