Edit: promisify.ts
import { Agent, ClientRequest, RequestOptions, AgentCallbackCallback, AgentCallbackPromise, AgentCallbackReturn } from './index'; type LegacyCallback = ( req: ClientRequest, opts: RequestOptions, fn: AgentCallbackCallback ) => void; export default function promisify(fn: LegacyCallback): AgentCallbackPromise { return function(this: Agent, req: ClientRequest, opts: RequestOptions) { return new Promise((resolve, reject) => { fn.call( this, req, opts, (err: Error | null | undefined, rtn?: AgentCallbackReturn) => { if (err) { reject(err); } else { resolve(rtn); } } ); }); }; }
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