NAME

    Finance::Bitcoin::Feed - Collect bitcoin real-time price from many
    sites' streaming data source

SYNOPSIS

        use Finance::Bitcoin::Feed;
    
        #default output is to print to the stdout
        Finance::Bitcoin::Feed->new->run();
        # will print output to the stdout:
        # COINSETTER BTCUSD 123.00
        
    
        #or custom your stdout
        my $feed = Finance::Bitcoin::Feed->new;
        #first unsubscribe the event 'output'
        $feed->unsubscribe('output');
        #then listen on 'output' by your callback
        open  my $fh, ">out.txt";
        $fh->autoflush();
        $feed->on('output', sub{
           my ($self, $site, $currency, $price) = @_;
           print $fh "the price currency $currency on site $site is $price\n";
        });
        # let's go!
        $feed->run();

DESCRIPTION

    Finance::Bitcoin::Feed is a bitcoin realtime data source which collect
    real time data source from these sites:

      * HitBtc <https://hitbtc.com/api#socketio>

      * BtcChina
      <http://btcchina.org/websocket-api-market-data-documentation-en>

      * CoinSetter <https://www.coinsetter.com/api/websockets/last>

    The default output format to the stdout by this format:

       site_name TIMESTAMP CURRENCY price

    For example:

       COINSETTER 1418173081724 BTCUSD 123.00

    The unit of timestamp is ms.

    You can custom your output by listen on the event output and modify the
    data it received.

METHODS

    This class inherits all methods from Mojo::EventEmitter

EVENTS

    This class inherits all events from Mojo::EventEmitter and add the
    following new ones:

 output

       #output to the stdout, the default action:
       $feed->on('output', sub { shift; say join " ", @_ } );
    
       #or you can clear this default action and add yours:
       $feed->unsubscribe('output');
       open  my $fh, ">out.txt";
       $feed->on('output', sub{
          my ($self, $site, $currency, $price) = @_;
          say $fh "the price of $site of currency $currency is $price"
       });

DEBUGGING

    You can set the FINANCE_BITCOIN_FEED_DEBUG environment variable to get
    some advanced diagnostics information printed to STDERR. And these
    modules use Mojo::UserAgent, you can also open the MOJO_USERAGENT_DEBUG
    environment variable:

       FINANCE_BITCOIN_FEED_DEBUG=1
       MOJO_USERAGENT_DEBUG=1

SEE ALSO

    Mojo::EventEmitter

    Finance::Bitcoin::Feed::Site::Hitbtc

    Finance::Bitcoin::Feed::Site::BtcChina

    Finance::Bitcoin::Feed::Site::CoinSetter

AUTHOR

    Chylli <chylli@binary.com>

COPYRIGHT

    Copyright 2014- Binary.com