Amount_conversion

Amount conversion from lower subunit to higher unit and vice-versa

```rust

use amount_conversion::amount::FromCurrency;

[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, serde::Deserialize, serde::Serialize)]

enum Currency { Inr, Usd, }

impl FromCurrency for Currency { fn currency(&self) -> &str { match self { Currency::Inr => "INR", Currency::Usd => "USD", } } }

type Amount = AmountInner; type AmountH = AmountInner;

[derive(serde::Deserialize)]

struct Request { #[serde(flatten)] amount: Amount, id: i8, }

let amount_str = r#"{ "amount": 1, "currency": "Inr", "id": 1 }"#;

let request = serdejson::fromstr::(amount_str)?;

let highestunit: AmountH = request.amount.convert()?; let lowestunit: Amount = highestunit.convert()?; asserteq!(request.amount, lowest_unit); ```