Yesterday, the Kraken virtual currency exchange announced +their +Websocket service, providing a stream of exchange updates to its +clients. Getting updated rates quickly is a good idea, so I used +their API +documentation and added Websocket support to the Kraken service in +Valutakrambod today. The python library can now get updates +from Kraken several times per second, instead of every time the +information is polled from the REST API.
+ +If this sound interesting to you, the code for valutakrambod is +available from +github. +Here is example output from the example client displaying rates in a +curses view:
+ ++ ++ Name Pair Bid Ask Spr Ftcd Age + BitcoinsNorway BTCEUR 2959.2800 3021.0500 2.0% 36 nan nan + Bitfinex BTCEUR 3087.9000 3088.0000 0.0% 36 37 nan + Bitmynt BTCEUR 3001.8700 3135.4600 4.3% 36 52 nan + Bitpay BTCEUR 3003.8659 nan nan% 35 nan nan + Bitstamp BTCEUR 3008.0000 3010.2300 0.1% 0 1 1 + Bl3p BTCEUR 3000.6700 3010.9300 0.3% 1 nan nan + Coinbase BTCEUR 2992.1800 3023.2500 1.0% 34 nan nan + Kraken+BTCEUR 3005.7000 3006.6000 0.0% 0 1 0 + Paymium BTCEUR 2940.0100 2993.4400 1.8% 0 2688 nan + BitcoinsNorway BTCNOK 29000.0000 29360.7400 1.2% 36 nan nan + Bitmynt BTCNOK 29115.6400 29720.7500 2.0% 36 52 nan + Bitpay BTCNOK 29029.2512 nan nan% 36 nan nan + Coinbase BTCNOK 28927.6000 29218.5900 1.0% 35 nan nan + MiraiEx BTCNOK 29097.7000 29741.4200 2.2% 36 nan nan + BitcoinsNorway BTCUSD 3385.4200 3456.0900 2.0% 36 nan nan + Bitfinex BTCUSD 3538.5000 3538.6000 0.0% 36 45 nan + Bitpay BTCUSD 3443.4600 nan nan% 34 nan nan + Bitstamp BTCUSD 3443.0100 3445.0500 0.1% 0 2 1 + Coinbase BTCUSD 3428.1600 3462.6300 1.0% 33 nan nan + Gemini BTCUSD 3445.8800 3445.8900 0.0% 36 326 nan + Hitbtc BTCUSD 3473.4700 3473.0700 -0.0% 0 0 0 + Kraken+BTCUSD 3444.4000 3445.6000 0.0% 0 1 0 + Exchangerates EURNOK 9.6685 9.6685 0.0% 36 22226 nan + Norgesbank EURNOK 9.6685 9.6685 0.0% 36 22226 nan + Bitstamp EURUSD 1.1440 1.1462 0.2% 0 1 2 + Exchangerates EURUSD 1.1471 1.1471 0.0% 36 22226 nan + BitcoinsNorway LTCEUR 1.0009 22.6538 95.6% 35 nan nan + BitcoinsNorway LTCNOK 259.0900 264.9300 2.2% 35 nan nan + BitcoinsNorway LTCUSD 0.0000 29.0000 100.0% 35 nan nan + Norgesbank USDNOK 8.4286 8.4286 0.0% 36 22226 nan +
Yes, I notice the strange negative spread on Hitbtc. I've seen the +same on Kraken. Another strange observation is that Kraken some times +announce trade orders a fraction of a second in the future. I really +wonder what is going on there.
+ +As usual, if you use Bitcoin and want to show your support of my +activities, please send Bitcoin donations to my address +15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b.
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