index.d.ts

declare module 'https-proxy-agent' {
	import * as https from 'https';

	namespace HttpsProxyAgent {
		interface HttpsProxyAgentOptions {
			host: string;
			port: number | string;
			secureProxy?: boolean;
			headers?: {
				[key: string]: string;
			};
			[key: string]: any;
		}
	}

	// HttpsProxyAgent doesnt *actually* extend https.Agent, but for my purposes I want it to pretend that it does
	class HttpsProxyAgent extends https.Agent {
		constructor(opts: HttpsProxyAgent.HttpsProxyAgentOptions | string);
	}

	export = HttpsProxyAgent;
}