DARKNET: Darkweb Expansion Project & Bitnode (#2139)

This is BN15. It is a really big change; see the PR for all the details.

src/DarkNet/utils/darknetServerUtils.ts

@@ -0,0 +1,21 @@
+import { DarknetServer } from "../../Server/DarknetServer";
+import { GetServer } from "../../Server/AllServers";
+
+export const getDarknetServer = (host: string): DarknetServer | null => {
+  const server = GetServer(host);
+  if (!server || !(server instanceof DarknetServer)) {
+    return null;
+  }
+  return server;
+};
+
+export function getDarknetServerOrThrow(host: string): DarknetServer {
+  const server = GetServer(host);
+  if (!server) {
+    throw new Error(`Server ${host} does not exist.`);
+  }
+  if (!(server instanceof DarknetServer)) {
+    throw new Error(`Server ${host} is not a darknet server.`);
+  }
+  return server;
+}