blog/archive/2019/02/02.rss

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   4                 <title>Petter Reinholdtsen - Entries from February 2019</title>
   5                 <description>Entries from February 2019</description>
   6                 <link>http://people.skolelinux.org/pere/blog/</link>
   7
   8
   9         <item>
  10                 <title>Websocket from Kraken in Valutakrambod</title>
  11                 <link>http://people.skolelinux.org/pere/blog/Websocket_from_Kraken_in_Valutakrambod.html</link>
  12                 <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Websocket_from_Kraken_in_Valutakrambod.html</guid>
  13                 <pubDate>Fri, 1 Feb 2019 22:25:00 +0100</pubDate>
  14                 <description>&lt;p&gt;Yesterday, the Kraken virtual currency exchange announced
  15 &lt;a href=&quot;https://blog.kraken.com/post/2019/websockets-public-api-launching-soon/&quot;&gt;their
  16 Websocket service&lt;/a&gt;, providing a stream of exchange updates to its
  17 clients.  Getting updated rates quickly is a good idea, so I used
  18 their &lt;a href=&quot;https://www.kraken.com/en-us/help/websocket-api&quot;&gt;API
  19 documentation&lt;/a&gt; and added Websocket support to the Kraken service in
  20 Valutakrambod today.  The python library can now get updates
  21 from Kraken several times per second, instead of every time the
  22 information is polled from the REST API.&lt;/p&gt;
  23
  24 &lt;p&gt;If this sound interesting to you, the code for valutakrambod is
  25 available from
  26 &lt;a href=&quot;http://github.com/petterreinholdtsen/valutakrambod&quot;&gt;github&lt;/a&gt;.
  27 Here is example output from the example client displaying rates in a
  28 curses view:&lt;/p&gt;
  29
  30 &lt;p&gt;&lt;blockquote&gt;&lt;pre&gt;
  31            Name Pair   Bid         Ask         Spr    Ftcd    Age
  32  BitcoinsNorway BTCEUR   2959.2800   3021.0500   2.0%   36    nan    nan
  33        Bitfinex BTCEUR   3087.9000   3088.0000   0.0%   36     37    nan
  34         Bitmynt BTCEUR   3001.8700   3135.4600   4.3%   36     52    nan
  35          Bitpay BTCEUR   3003.8659         nan   nan%   35    nan    nan
  36        Bitstamp BTCEUR   3008.0000   3010.2300   0.1%    0      1      1
  37            Bl3p BTCEUR   3000.6700   3010.9300   0.3%    1    nan    nan
  38        Coinbase BTCEUR   2992.1800   3023.2500   1.0%   34    nan    nan
  39          Kraken+BTCEUR   3005.7000   3006.6000   0.0%    0      1      0
  40         Paymium BTCEUR   2940.0100   2993.4400   1.8%    0   2688    nan
  41  BitcoinsNorway BTCNOK  29000.0000  29360.7400   1.2%   36    nan    nan
  42         Bitmynt BTCNOK  29115.6400  29720.7500   2.0%   36     52    nan
  43          Bitpay BTCNOK  29029.2512         nan   nan%   36    nan    nan
  44        Coinbase BTCNOK  28927.6000  29218.5900   1.0%   35    nan    nan
  45         MiraiEx BTCNOK  29097.7000  29741.4200   2.2%   36    nan    nan
  46  BitcoinsNorway BTCUSD   3385.4200   3456.0900   2.0%   36    nan    nan
  47        Bitfinex BTCUSD   3538.5000   3538.6000   0.0%   36     45    nan
  48          Bitpay BTCUSD   3443.4600         nan   nan%   34    nan    nan
  49        Bitstamp BTCUSD   3443.0100   3445.0500   0.1%    0      2      1
  50        Coinbase BTCUSD   3428.1600   3462.6300   1.0%   33    nan    nan
  51          Gemini BTCUSD   3445.8800   3445.8900   0.0%   36    326    nan
  52          Hitbtc BTCUSD   3473.4700   3473.0700  -0.0%    0      0      0
  53          Kraken+BTCUSD   3444.4000   3445.6000   0.0%    0      1      0
  54   Exchangerates EURNOK      9.6685      9.6685   0.0%   36  22226    nan
  55      Norgesbank EURNOK      9.6685      9.6685   0.0%   36  22226    nan
  56        Bitstamp EURUSD      1.1440      1.1462   0.2%    0      1      2
  57   Exchangerates EURUSD      1.1471      1.1471   0.0%   36  22226    nan
  58  BitcoinsNorway LTCEUR      1.0009     22.6538  95.6%   35    nan    nan
  59  BitcoinsNorway LTCNOK    259.0900    264.9300   2.2%   35    nan    nan
  60  BitcoinsNorway LTCUSD      0.0000     29.0000 100.0%   35    nan    nan
  61      Norgesbank USDNOK      8.4286      8.4286   0.0%   36  22226    nan
  62 &lt;/pre&gt;&lt;/blockquote&gt;&lt;/p&gt;
  63
  64 &lt;p&gt;Yes, I notice the strange negative spread on Hitbtc.  I&#39;ve seen the
  65 same on Kraken.  Another strange observation is that Kraken some times
  66 announce trade orders a fraction of a second in the future.  I really
  67 wonder what is going on there.&lt;/p&gt;
  68
  69 &lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
  70 activities, please send Bitcoin donations to my address
  71 &lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;
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