WIP: initial prototype

- Added sniff reason
- Improved types

lib/Transport.d.ts

@@ -6,42 +6,61 @@ declare type noopFn = (...args: any[]) => void;
 declare type emitFn = (event: string | symbol, ...args: any[]) => boolean;
 
 interface TransportOptions {
-    emit: emitFn & noopFn;
-    connectionPool: ConnectionPool;
-    serializer: Serializer;
-    maxRetries: number;
-    requestTimeout: number | string;
-    suggestCompression: boolean;
-    sniffInterval: number;
-    sniffOnConnectionFault: boolean;
-    sniffEndpoint: string;
-    sniffOnStart: boolean;
+  emit: emitFn & noopFn;
+  connectionPool: ConnectionPool;
+  serializer: Serializer;
+  maxRetries: number;
+  requestTimeout: number | string;
+  suggestCompression: boolean;
+  sniffInterval: number;
+  sniffOnConnectionFault: boolean;
+  sniffEndpoint: string;
+  sniffOnStart: boolean;
 }
 
 export interface ApiResponse {
-    body: any;
-    statusCode: number | null;
-    headers: any;
-    warnings: any[] | null;
+  body: any;
+  statusCode: number | null;
+  headers: any;
+  warnings: any[] | null;
+}
+
+export interface EventMeta {
+  connection: Connection;
+  request: any;
+  response: ApiResponse;
+  attempts: number;
+  aborted: boolean;
+}
+
+export interface SniffMeta {
+  hosts: any[];
+  reason: string;
 }
 
 export default class Transport {
-    emit: emitFn & noopFn;
-    connectionPool: ConnectionPool;
-    serializer: Serializer;
-    maxRetries: number;
-    requestTimeout: number;
-    suggestCompression: boolean;
-    sniffInterval: number;
-    sniffOnConnectionFault: boolean;
-    sniffEndpoint: string;
-    _sniffEnabled: boolean;
-    _nextSniff: number;
-    _isSniffing: boolean;
-    constructor(opts: TransportOptions);
-    request(params: any, callback: (err: Error | null, result: ApiResponse) => void): any;
-    getConnection(): Connection | null;
-    sniff(callback?: (...args: any[]) => void): void;
+  static sniffReasons: {
+      SNIFF_ON_START: string;
+      SNIFF_INTERVAL: string;
+      SNIFF_ON_CONNECTION_FAULT: string;
+      DEFAULT: string;
+  };
+  emit: emitFn & noopFn;
+  connectionPool: ConnectionPool;
+  serializer: Serializer;
+  maxRetries: number;
+  requestTimeout: number;
+  suggestCompression: boolean;
+  sniffInterval: number;
+  sniffOnConnectionFault: boolean;
+  sniffEndpoint: string;
+  _sniffEnabled: boolean;
+  _nextSniff: number;
+  _isSniffing: boolean;
+  constructor(opts: TransportOptions);
+  request(params: any, callback: (err: Error | null, result: ApiResponse) => void): any;
+  getConnection(): Connection | null;
+  sniff(callback?: (...args: any[]) => void): void;
 }
 
 export {};