Haspara.Monetary

This module provides definitions for modeling and working with monetary values.

Documentation

data Money (s :: Nat)

Type encoding for dated monetary values.

A dated monetary value is a 3-tuple of:

1. a date when the monetary value is effective as of,
2. the currency of the monetary value, and
3. the quantity of the monetary value.

Constructors

Money

Fields

• moneyDate :: !Day
• moneyCurrency :: !Currency
• moneyQuantity :: !(Quantity s)

Instances

Eq (Money s)

Defined in Haspara.Monetary

Methods

(==) :: Money s -> Money s -> Bool

(/=) :: Money s -> Money s -> Bool

Ord (Money s)

Defined in Haspara.Monetary

Methods

compare :: Money s -> Money s -> Ordering

(<) :: Money s -> Money s -> Bool

(<=) :: Money s -> Money s -> Bool

(>) :: Money s -> Money s -> Bool

(>=) :: Money s -> Money s -> Bool

max :: Money s -> Money s -> Money s

min :: Money s -> Money s -> Money s

KnownNat s => Show (Money s)

Defined in Haspara.Monetary

Methods

showsPrec :: Int -> Money s -> ShowS

show :: Money s -> String

showList :: [Money s] -> ShowS

Generic (Money s)

Defined in Haspara.Monetary

Associated Types

type Rep (Money s) :: Type -> Type

Methods

from :: Money s -> Rep (Money s) x

to :: Rep (Money s) x -> Money s

KnownNat s => ToJSON (Money s)

Defined in Haspara.Monetary

Methods

toJSON :: Money s -> Value

toEncoding :: Money s -> Encoding

toJSONList :: [Money s] -> Value

toEncodingList :: [Money s] -> Encoding

KnownNat s => FromJSON (Money s)

Defined in Haspara.Monetary

Methods

parseJSON :: Value -> Parser (Money s)

parseJSONList :: Value -> Parser [Money s]

type Rep (Money s)

Defined in Haspara.Monetary

type Rep (Money s) = D1 ('MetaData "Money" "Haspara.Monetary" "haspara-0.0.0.2-AxwfIaY3JAe5J0iuX9jCcl" 'False) (C1 ('MetaCons "Money" 'PrefixI 'True) (S1 ('MetaSel ('Just "moneyDate") 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Day) :*: (S1 ('MetaSel ('Just "moneyCurrency") 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Currency) :*: S1 ('MetaSel ('Just "moneyQuantity") 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (Quantity s)))))

class MonadThrow m => Monetary m where

Type encoding of a monetary context.

Minimal complete definition

convertM

Methods

convertM :: HasCallStack => KnownNat s => Currency -> Money s -> m (Money s)

Converts the given monetary value in one currency to another currency.

Note that the conversion is performed with an FX rate quotation as of the date of the given monetary value.

convertAsofM :: HasCallStack => KnownNat s => Day -> Currency -> Money s -> m (Money s)

Converts the given monetary value in one currency to another currency as of the given date.

The rule is:

convertAsofM DATE2 CCY2 (Money DATE1 CCY1 QTY1) === convertM CCY2 (Money DATE2 CCY1 QTY1)

convert :: HasCallStack => MonadThrow m => KnownNat s => KnownNat k => Money s -> FxQuote k -> m (Money s)

Attempts to convert the given Money to another using the given FxQuote value.

This function runs some guards before attempting to do the conversion:

1. Base currency of the FX rate quotation should be the same as the currency of the monetary value, throws IncompatibleCurrenciesException otherwise.
2. Date of the FX rate quotation should be equal to or greater than the date of the monetary value, throws IncompatibleDatesException otherwise.
3. Rate of the FX rate quotation should be 1 if the base and quote quotation are same, throws InconsistentFxQuoteException otherwise.

data MonetaryException where

Type encoding of exceptions thrown by the Monetary module.

Constructors

IncompatibleCurrenciesException

Indicates that we received a currency other than the expected currency.

Fields

• :: HasCallStack
• => Currency

  Expected currency

• -> Currency

  Received currency

• -> MonetaryException

IncompatibleDatesException

Indicates that we received a currency other than the expected currency.

Fields

• :: HasCallStack
• => Day

  Date on and onwards of interest

• -> Day

  Date received

• -> MonetaryException

InconsistentFxQuoteException

Indicates that we received a currency other than the expected currency.

Fields

• :: forall (s :: Nat). (HasCallStack, KnownNat s)
• => FxQuote s

  FX rate quotation that is interpreted as inconsistent.

• -> MonetaryException

Instances

Show MonetaryException

Defined in Haspara.Monetary

Methods

showsPrec :: Int -> MonetaryException -> ShowS

show :: MonetaryException -> String

showList :: [MonetaryException] -> ShowS

Exception MonetaryException

Defined in Haspara.Monetary

Methods

toException :: MonetaryException -> SomeException

fromException :: SomeException -> Maybe MonetaryException

displayException :: MonetaryException -> String