Create type definition for 'webfinger.js' (#4054)

src/@types/webfinger.js.d.ts

@@ -0,0 +1,65 @@
+declare module 'webfinger.js' {
+	interface IWebFingerConstructorConfig {
+		tls_only?: boolean;
+		webfist_fallback?: boolean;
+		uri_fallback?: boolean;
+		request_timeout?: number;
+	}
+
+	type JRDProperties = { [type: string]: string };
+
+	interface IJRDLink {
+		rel: string;
+		type?: string;
+		href?: string;
+		template?: string;
+		titles?: { [lang: string]: string };
+		properties?: JRDProperties;
+	}
+
+	interface IJRD {
+		subject?: string;
+		expires?: Date;
+		aliases?: string[];
+		properties?: JRDProperties;
+		links?: IJRDLink[];
+	}
+
+	interface IIDXLinks {
+    'avatar': IJRDLink[];
+    'remotestorage': IJRDLink[];
+    'blog': IJRDLink[];
+    'vcard': IJRDLink[];
+    'updates': IJRDLink[];
+    'share': IJRDLink[];
+    'profile': IJRDLink[];
+    'webfist': IJRDLink[];
+		'camlistore': IJRDLink[];
+		[type: string]: IJRDLink[];
+	}
+
+	interface IIDXProperties {
+		'name': string;
+		[type: string]: string;
+	}
+
+	interface IIDX {
+		links: IIDXLinks;
+		properties: IIDXProperties;
+	}
+
+	interface ILookupCallbackResult {
+		object: IJRD;
+		json: string;
+		idx: IIDX;
+	}
+
+	type LookupCallback = (err: Error | string, result?: ILookupCallbackResult) => void;
+
+	export class WebFinger {
+		constructor(config?: IWebFingerConstructorConfig);
+
+		public lookup(address: string, cb: LookupCallback): NodeJS.Timeout;
+		public lookupLink(address: string, rel: string, cb: IJRDLink): void;
+	}
+}

src/remote/webfinger.ts

@@ -1,4 +1,4 @@
-const WebFinger = require('webfinger.js');
+import { WebFinger } from 'webfinger.js';
 
 const webFinger = new WebFinger({ });
 
@@ -13,7 +13,7 @@ type IWebFinger = {
 };
 
 export default async function resolve(query: any): Promise<IWebFinger> {
-	return await new Promise((res, rej) => webFinger.lookup(query, (error: Error, result: any) => {
+	return await new Promise((res, rej) => webFinger.lookup(query, (error: Error | string, result: any) => {
 		if (error) {
 			return rej(error);
 		}