made-core 0.7.4

Domain core of MADE: entities, value objects, events, ports. No IO.
Documentation 
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use crate::DomainError;
use serde::{Deserialize, Deserializer, Serialize};

#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
#[serde(transparent)]
pub struct CurrencyCode(String);
impl CurrencyCode {
    pub fn new(value: impl Into<String>) -> Result<Self, DomainError> {
        let value = value.into();
        if value.len() != 3 || !value.bytes().all(|byte| byte.is_ascii_uppercase()) {
            return Err(DomainError::InvalidCharacters {
                field: "currency_code",
            });
        }
        Ok(Self(value))
    }
    #[must_use]
    pub fn as_str(&self) -> &str {
        &self.0
    }
}
impl<'de> Deserialize<'de> for CurrencyCode {
    fn deserialize<D: Deserializer<'de>>(d: D) -> Result<Self, D::Error> {
        Self::new(String::deserialize(d)?).map_err(serde::de::Error::custom)
    }
}