Safe Haskell	Safe
Language	Haskell2010

Data.Money

Description

Simple currency handling and exchange library

Synopsis

Documentation

data USD Source #

U.S. Dollar

Constructors

USD

Instances

Eq USD Source #
Methods (==) :: USD -> USD -> Bool # (/=) :: USD -> USD -> Bool #
Show USD Source #
Methods showsPrec :: Int -> USD -> ShowS # show :: USD -> String # showList :: [USD] -> ShowS #
CurrencySymbol USD Source #	Currency symbols can have exchange rates

data RUB Source #

Russian Ruble

Constructors

RUB

Instances

Eq RUB Source #
Methods (==) :: RUB -> RUB -> Bool # (/=) :: RUB -> RUB -> Bool #
Show RUB Source #
Methods showsPrec :: Int -> RUB -> ShowS # show :: RUB -> String # showList :: [RUB] -> ShowS #
CurrencySymbol RUB Source #

data EUR Source #

Euro

Constructors

EUR

Instances

Eq EUR Source #
Methods (==) :: EUR -> EUR -> Bool # (/=) :: EUR -> EUR -> Bool #
Show EUR Source #
Methods showsPrec :: Int -> EUR -> ShowS # show :: EUR -> String # showList :: [EUR] -> ShowS #
CurrencySymbol EUR Source #

data BTC Source #

Bitcoin

Constructors

BTC

Instances

Eq BTC Source #
Methods (==) :: BTC -> BTC -> Bool # (/=) :: BTC -> BTC -> Bool #
Show BTC Source #
Methods showsPrec :: Int -> BTC -> ShowS # show :: BTC -> String # showList :: [BTC] -> ShowS #
CurrencySymbol BTC Source #

data LTC Source #

Litecoin

Constructors

LTC

Instances

Eq LTC Source #
Methods (==) :: LTC -> LTC -> Bool # (/=) :: LTC -> LTC -> Bool #
Show LTC Source #
Methods showsPrec :: Int -> LTC -> ShowS # show :: LTC -> String # showList :: [LTC] -> ShowS #
CurrencySymbol LTC Source #

class (Typeable a, Eq a) => CurrencySymbol a Source #

Things that can be looked up in the rates dictionary

Instances

CurrencySymbol LTC Source #

CurrencySymbol BTC Source #

CurrencySymbol EUR Source #

CurrencySymbol RUB Source #

CurrencySymbol USD Source #	Currency symbols can have exchange rates

class ScalableAdditive a where Source #

Things that can be scaled (or shrinked) with scalars, and added (subtracted) together (like money or a mining hashrate)

Minimal complete definition

(^*), (^+^), (^-^)

Methods

(^*) :: a -> Double -> a Source #

(^+^) :: a -> a -> a Source #

(^-^) :: a -> a -> a Source #

(^/) :: a -> Double -> a Source #

Instances

ScalableAdditive (Money a) Source #	Money can be `scaled` or added together when they have equal types
Methods (^*) :: Money a -> Double -> Money a Source # (^+^) :: Money a -> Money a -> Money a Source # (^-^) :: Money a -> Money a -> Money a Source # (^/) :: Money a -> Double -> Money a Source #

data ExchangeRates Source #

A dictionary of exchange rates (indexed by pairs of base and foreign currency symbols)

Instances

Show ExchangeRates Source #
Methods showsPrec :: Int -> ExchangeRates -> ShowS # show :: ExchangeRates -> String # showList :: [ExchangeRates] -> ShowS #

makeExchangeRates :: (CurrencySymbol a, CurrencySymbol b) => [((a, b), Double)] -> ExchangeRates Source #

Construct the exchange dictionary from instances of CurrencySymbol

data Money a Source #

Polymorphic type representing money

Instances

Eq a => Eq (Money a) Source #
Methods (==) :: Money a -> Money a -> Bool # (/=) :: Money a -> Money a -> Bool #
Show a => Show (Money a) Source #
Methods showsPrec :: Int -> Money a -> ShowS # show :: Money a -> String # showList :: [Money a] -> ShowS #
ScalableAdditive (Money a) Source #	Money can be `scaled` or added together when they have equal types
Methods (^*) :: Money a -> Double -> Money a Source # (^+^) :: Money a -> Money a -> Money a Source # (^-^) :: Money a -> Money a -> Money a Source # (^/) :: Money a -> Double -> Money a Source #

makeMoney :: CurrencySymbol a => Double -> a -> Money a Source #

Money constructor over currency symbols

makeUSD :: Double -> Money USD Source #

makeRUB :: Double -> Money RUB Source #

makeEUR :: Double -> Money EUR Source #

makeBTC :: Double -> Money BTC Source #

makeLTC :: Double -> Money LTC Source #

amount :: Money a -> Double Source #

Extract amount (i.e. quantity of the asset) from Money

symbol :: Money a -> a Source #

Extract the currency symbol from Money

findRate :: (CurrencySymbol a, CurrencySymbol b) => ExchangeRates -> a -> b -> Maybe Double Source #

Returns the direct conversion rate or tries to compute the reverse one

exchangeTo :: (CurrencySymbol a, CurrencySymbol b) => ExchangeRates -> Money a -> b -> Maybe (Money b) Source #

Maybe convert the money to designated currency symbol

sampleRates :: ExchangeRates Source #

Sample rates dictionary (19 Jan 2017)