nl_tokens: Constructor
pl_tokens: function Poloniex ( key , secret ) { if ( key && secret ) { authenticated = true ; } // Generate headers signed by this user's key and secret. // The secret is encapsulated and never exposed this . _getPrivateHeaders = function ( parameters ) { if ( ! authenticated ) { throw 'Poloniex: Error. API key and secret required' ; } // Convert to `arg1=foo&arg2=bar` const paramString = Object . keys ( parameters ) . map ( function ( param ) { return encodeURIComponent ( param ) + '=' + encodeURIComponent ( parameters [ param ] ) ; } ) . <mask> ( '&' ) ; const signature = crypto . createHmac ( 'sha512' , secret ) . update ( paramString ) . digest ( 'hex' ) ; return { Key : key , Sign : signature } ; } ; }