public function addSignerfile($file)
    {
        if (!file_exists($file)) {
            throw new Error('file not found', 'File does not exist. Please use an absolute file path.');
        }

        $this->signer_file = fopen($file, 'rb');
        return $this;
    }
public function addSignerfile($file)
    {
        if (!file_exists($file)) {
            throw new Error('file not found', 'File does not exist. Please use an absolute file path.');
        }

        $this->signer_file = fopen($file, 'rb');
        return $this;
    }
public function addSignerfile ( $ file ) { if ( ! file_exists ( $ file ) ) { throw new Error ( 'file not found' , 'File does not exist. Please use an absolute file path.' ) ; } $ this -> signer_file = fopen ( $ file , 'rb' ) ; return $ this ; }
Adds a list of signers in a CSV file. Required unless signer_list is used.

@param  string $file path for signer_file
@return BulkSendJob
@ignore
Adds a list of signers in a CSV file . Required unless signer_list is used .