stablesats-shared 0.1.3

Code shared between stablesats packages
Documentation 
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use super::primitives::*;
use crate::currency::*;

impl TryFrom<PriceRatioRaw> for UsdCents {
    type Error = CurrencyError;

    fn try_from(ratio: PriceRatioRaw) -> Result<Self, Self::Error> {
        if ratio.numerator_unit.0 != UsdCents::code() {
            return Err(CurrencyError::Conversion(
                ratio.numerator_unit.to_string(),
                UsdCents::code(),
            ));
        }
        Ok(UsdCents::from_decimal(ratio.numerator_amount()))
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use rust_decimal::prelude::*;

    #[test]
    fn convert_to_usd_cents() {
        let ratio = PriceRatioRaw {
            numerator_unit: CurrencyRaw::from(UsdCents::code()),
            denominator_unit: CurrencyRaw::from(Sats::code()),
            offset: 12,
            base: Decimal::new(9_999_990_000, 0),
        };
        let price_of_one_sat = UsdCents::try_from(ratio).unwrap();
        assert_eq!(
            price_of_one_sat.amount().to_string(),
            "0.00999999".to_string()
        );
    }
}