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exchangerates: A Haskell client for https://exchangeratesapi.io/

[ api, bsd3, library ] [ Propose Tags ]

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  • ExchangeRates
    • ExchangeRates.API
    • ExchangeRates.Cache
    • ExchangeRates.Client
    • ExchangeRates.Types

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Versions [RSS] 0.0.0.0
Dependencies aeson, base (>=4.7 && <5), containers, directory, http-api-data, http-client, http-client-tls, mtl, servant, servant-client, stm, text, time, validity (>=0.4.0.3), validity-containers, validity-time, yaml [details]
License BSD-3-Clause
Copyright Copyright: (c) 2018 Tom Sydney Kerckhove
Author Tom Sydney Kerckhove
Maintainer syd.kerckhove@gmail.com
Category API
Home page https://github.com/NorfairKing/exchangerates#readme
Bug tracker https://github.com/NorfairKing/exchangerates/issues
Source repo head: git clone https://github.com/NorfairKing/exchangerates
Uploaded by Norfair at 2018-07-28T10:09:15Z
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Reverse Dependencies 1 direct, 0 indirect [details]
Downloads 805 total (6 in the last 30 days)
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Status Docs not available [build log]
All reported builds failed as of 2018-07-28 [all 3 reports]

Readme for exchangerates-0.0.0.0

[back to package description]

ExchangeRates, a Haskell client for http://exchangeratesapi.io/

Automatic Transparent Caching

Because historical currency conversion rates do not change post-hoc, we can cache them indefinitely. Because of this, and because http://exchangeratesapi.io/ is a free service, we should cache the results of the API as much as possible. This client automatically transparenly caches results so that the real API is only called when absolutely necessary.

Example usage:

main :: IO
main = do
    rates <-
        autoRunExchangeRatesClient $
          withFileCache "/tmp/exchangerates.cache" $
            getAtDate (fromGregorian 2018 01 19) (Just EUR) Nothing
    case rates of
        Left err -> die $ show err
        Right v -> print v

Rates
  { ratesBase = EUR
  , ratesDate = 2018-01-19
  , ratesRates = fromList
    [ (AUD,Rate {unRate = 6891408149802333 % 4503599627370496})
    , (BGN,Rate {unRate = 550508759450701 % 281474976710656})
    , (BRL,Rate {unRate = 8852275427559447 % 2251799813685248})
    , (CAD,Rate {unRate = 3433093995944529 % 2251799813685248})
    , (CHF,Rate {unRate = 5295332441862229 % 4503599627370496})
    , (CNY,Rate {unRate = 8836175058891597 % 1125899906842624})
    , (CZK,Rate {unRate = 3579376541341057 % 140737488355328})
    , (DKK,Rate {unRate = 8382775166406073 % 1125899906842624})
    , (GBP,Rate {unRate = 3979605810725939 % 4503599627370496})
    , (HKD,Rate {unRate = 5393848683710959 % 562949953421312})
    , (HRK,Rate {unRate = 4185645493678139 % 562949953421312})
    , (HUF,Rate {unRate = 5439503924933427 % 17592186044416})
    , (IDR,Rate {unRate = 16316 % 1})
    , (ILS,Rate {unRate = 2355213720128743 % 562949953421312})
    , (INR,Rate {unRate = 2752790087858127 % 35184372088832})
    , (JPY,Rate {unRate = 4768889792920289 % 35184372088832})
    , (KRW,Rate {unRate = 2873903492680909 % 2199023255552})
    , (MXN,Rate {unRate = 6422133068630327 % 281474976710656})
    , (MYR,Rate {unRate = 5433592950422503 % 1125899906842624})
    , (NOK,Rate {unRate = 5417999236712733 % 562949953421312})
    , (NZD,Rate {unRate = 3790004266413641 % 2251799813685248})
    , (PHP,Rate {unRate = 8745146051423371 % 140737488355328})
    , (PLN,Rate {unRate = 2348402025692345 % 562949953421312})
    , (RON,Rate {unRate = 2623009012971261 % 562949953421312})
    , (RUB,Rate {unRate = 609850721415725 % 8796093022208})
    , (SEK,Rate {unRate = 5535655776977787 % 562949953421312})
    , (SGD,Rate {unRate = 1821480869289997 % 1125899906842624})
    , (THB,Rate {unRate = 2749236466277155 % 70368744177664})
    , (TRY,Rate {unRate = 5241852196287205 % 1125899906842624})
    , (USD,Rate {unRate = 5519161343342543 % 4503599627370496})
    , (ZAR,Rate {unRate = 8418916553415721 % 562949953421312})
    ]
  }