• Bitcoincharts Beancount converter

This is a quick tool I hacked together to convert historic bitcoin prices from [[http://api.bitcoincharts.com/v1/csv/][bitcoincharts CSVs]] into beancount price directives.

The files are gzipped CSVs of (unixtime, price, tradeamount)

For each month with trades on the 1st, the tool calculates a weighted average of trades on that day and outputs a beancount price directive.

** Running

The tool does not download files on its own. Download the files before running.

#+BEGIN_SRC shell $ node index.js some.csv.gz

or

$ node index.js some.csv.gz EUR

or

$ node index.js some.csv.gz EUR BTC #+END_SRC

*** Parameters

• filename (gzipped CSV)
• currency [optional] (currency code used in beancount {USD,EUR, etc})
• commodity [optional] (currency code of commodity) {BTC,BCH,LTC, etc}

*** Status

It works. I don't plan on working on it much further.

It's not very efficent. I suspect the main problem is the group function probably doesn't assume that the input is sorted and therefore buffers its entire input. Patches welcome.

** License

MIT