Simplify auth object to key, secret, passphrase (#151)

This more consistent usage allows an AuthenticatedClient instance to be used
in place of an auth object

README.md

@@ -219,13 +219,13 @@ the API URI (defaults to `https://api.gdax.com`).
 
 ```js
 const key = 'your_api_key';
-const b64secret = 'your_b64_secret';
+const secret = 'your_b64_secret';
 const passphrase = 'your_passphrase';
 
 const apiURI = 'https://api.gdax.com';
 const sandboxURI = 'https://api-public.sandbox.gdax.com';
 
-const authedClient = new Gdax.AuthenticatedClient(key, b64secret, passphrase, apiURI);
+const authedClient = new Gdax.AuthenticatedClient(key, secret, passphrase, apiURI);
 ```
 
 Like `PublicClient`, all API methods can be used with either callbacks or will

index.d.ts

@@ -164,7 +164,7 @@ declare module 'gdax' {
  }
 
  export class AuthenticatedClient {
- constructor(key: string, b64secret: string, passphrase: string, apiURI: string);
+ constructor(key: string, secret: string, passphrase: string, apiURI: string);
 
  getCoinbaseAccounts(callback: callback<CoinbaseAccount[]>)
  getCoinbaseAccounts(): Promise<CoinbaseAccount[]>;

lib/clients/authenticated.js

@@ -3,10 +3,10 @@ const { signRequest } = require('../../lib/request_signer');
 const PublicClient = require('./public.js');
 
 class AuthenticatedClient extends PublicClient {
- constructor(key, b64secret, passphrase, apiURI) {
+ constructor(key, secret, passphrase, apiURI) {
  super('', apiURI);
  this.key = key;
- this.b64secret = b64secret;
+ this.secret = secret;
  this.passphrase = passphrase;
  }
 
@@ -29,12 +29,7 @@ class AuthenticatedClient extends PublicClient {
  }
 
  _getSignature(method, relativeURI, opts) {
- const auth = {
- key: this.key,
- secret: this.b64secret,
- passphrase: this.passphrase,
- };
- const sig = signRequest(auth, method, relativeURI, opts);
+ const sig = signRequest(this, method, relativeURI, opts);
 
  if (opts.body) {
  opts.body = JSON.stringify(opts.body);

lib/orderbook_sync.js

@@ -11,16 +11,7 @@ class OrderbookSync extends WebsocketClient {
  authenticatedClient = null,
  { heartbeat = false } = {}
  ) {
- let auth = null;
- if (authenticatedClient) {
- auth = {
- key: authenticatedClient.key,
- secret: authenticatedClient.b64secret,
- passphrase: authenticatedClient.passphrase,
- };
- }
-
- super(productIDs, websocketURI, auth, { heartbeat });
+ super(productIDs, websocketURI, authenticatedClient, { heartbeat });
  this.apiURI = apiURI;
  this.authenticatedClient = authenticatedClient;