AreEquals returns true if values l and r are the equal, including the currency.

AreSameCurrency returns true if values l and r have a currency code and they are the same values.

IsNegative returns true if the specified money value is valid and is negative.

IsPositive returns true if the specified money value is valid and is positive.

IsValid checks if specified value has a valid units/nanos signs and ranges.

IsZero returns true if the specified money value is equal to zero.

MultiplySlow is a slow multiplication operation done through adding the value to itself n-1 times.

Must panics if the given error is not nil.

Negate returns the same amount with the sign negated.

Sum adds two values.