Automatically migrated from Gitolite
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 

33 lines
903 B

Promise = require "bluebird"
bhttp = require "bhttp"
lastRates = null
lastRateCheck = 0
expireTime = 5 * 60 * 1000 # 5 minutes
module.exports = (cacheExpiration) ->
Promise.try ->
if Date.now() > lastRateCheck + expireTime
# We need fresh API data, our cache has expired.
Promise.try ->
Promise.all [
bhttp.get "http://api.fixer.io/latest", decodeJSON: true
bhttp.get "https://blockchain.info/ticker", decodeJSON: true
]
.spread (fixerRates, blockchainRates) ->
eurRates = fixerRates.body.rates
eurRates.BTC = 1 / blockchainRates.body.EUR["15m"]
return eurRates
.then (rates) ->
lastRates = rates
lastRateCheck = Date.now()
if cacheExpiration?
expireTime = cacheExpiration * 1000
return rates
.catch (err) ->
# API is down. FIXME: Allow for logging this error somehow.
return lastRates
else
return lastRates