brighton36
commented
9 years ago I lost interest in the project a good while back, and never committed this change. Want to clean this up and submit a PR on this coinbase version for me?
require 'money'
#require 'mtgox'
require 'coinbase'
require 'money/bank/google_currency'
class MtgoxBank < Money::Bank::VariableExchange
CACHE_EXPIRATION = 15.minutes
SUPPORTED_CURRENCIES = %w(USD EUR GBP AUD CAD CHF CNY DKK HKD JPY NZD PLN RUB SEK SGD THB)
# We define this here so that we can run tests on the Exchange rates without
# having to worry about whatever the actual exchange rate might be
cattr_accessor :ticker_rates
# Seemingly, floats are what the VariableExchange wants to have returned
# these are then cast to strings and fed to BigDecimal before being applied
# to exchange translations. (Returning strings or BigDecimals will work too)
def get_rate(from, to)
@mutex.synchronize do
case rate_key_for(from, to)
when /\A(#{SUPPORTED_CURRENCIES.join('|')})_TO_BTC\Z/
( BigDecimal(1) / BigDecimal(ticker($1).to_s) ).to_s
when /\ABTC_TO_(#{SUPPORTED_CURRENCIES.join('|')})\Z/
ticker $1
else
# This means we're converting between the exchange currencies, using
# btc as the intermediary
(ticker(to) / ticker(from)).to_s
end
end
end
# If we're converting to BTC, we want to round our irrational numbers to
# something more reasonable. The definition of 'reasonable' is tied to the
# number of digits in the exchange rate.
def exchange_with(from, to_currency)
ret = super from, to_currency
if to_currency.symbol == 'BTC'
# We need to round based on the strength of the source currency
# But many times our source currency is simply btc. So, let's use USD then:
using_currency = (from.currency.iso_code == 'BTC') ? 'USD' : from.currency.iso_code
# This determines the number of decimal digits in the ticker
ticker_digits = Math.log10(ticker(using_currency)).floor
# When we're totally in the decimal digits, we don't need to round
ticker_digits = -3 if ticker_digits < -3
by_mod = 10 ** (5 - ticker_digits)
return Money.new(ret.cents - (ret.cents % by_mod), 'BTC')
end
ret
end
private
def ticker(for_cur)
for_cur = for_cur.to_s.downcase
(self.class.ticker_rates.try(:[],for_cur)) ?
self.class.ticker_rates[for_cur].to_f :
Rails.cache.fetch('mtgox/ticker/%s' % for_cur, :expires_in => CACHE_EXPIRATION){
Rails.logger.info "MtgoxBank is querying for %s" % for_cur
begin
# TODO: clean this up!
coinbase = Coinbase::Client.new('user', 'pass')
usd_rate = coinbase.buy_price(1).to_f
if for_cur == 'USD'
usd_rate
else
goog_rate = Money::Bank::GoogleCurrency.new.get_rate('USD', for_cur).to_f
goog_rate * usd_rate
end
rescue Errno::ETIMEDOUT, Errno::ECONNRESET, Faraday::Error::TimeoutError
# Note/TODO: MtGox is down
end
}
end
end
markkuit
rogueops
DaGitNah
MtGox API doesn't seem to be working. (http://data.mtgox.com/api/1/BTCUSD/ticker - error 403).
Is there any fix for it / alternative API? What happened to it?