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use serde::{de::DeserializeOwned, Serialize}; use std::error::Error; pub trait SerDe { fn marshal<T>(&self, data: &T) -> Result<Vec<u8>, Box<dyn Error + Send + Sync>> where Self: Sized, T: Sized + Serialize; fn unmarshal<T>(&self, raw: &[u8]) -> Result<T, Box<dyn Error + Send + Sync>> where Self: Sized, T: Sized + DeserializeOwned; } #[derive(Default)] struct JsonSerDe {} impl SerDe for JsonSerDe { fn marshal<T>(&self, data: &T) -> Result<Vec<u8>, Box<dyn Error + Send + Sync>> where T: Sized + Serialize, { Ok(serde_json::to_vec(data)?) } fn unmarshal<T>(&self, raw: &[u8]) -> Result<T, Box<dyn Error + Send + Sync>> where T: Sized + DeserializeOwned, { Ok(serde_json::from_slice(raw)?) } } pub fn json() -> impl SerDe { JsonSerDe {} } pub fn cbor() -> impl SerDe { CborSerDe {} } struct CborSerDe {} impl SerDe for CborSerDe { fn marshal<T>(&self, data: &T) -> Result<Vec<u8>, Box<dyn Error + Send + Sync>> where T: Sized + Serialize, { Ok(serde_cbor::to_vec(data)?) } fn unmarshal<T>(&self, raw: &[u8]) -> Result<T, Box<dyn Error + Send + Sync>> where T: Sized + DeserializeOwned, { Ok(serde_cbor::from_slice(raw)?) } } pub(crate) fn marshal<T>(ser: impl SerDe, data: &T) -> Result<Vec<u8>, Box<dyn Error + Send + Sync>> where T: Sized + Serialize, { ser.marshal(data) } pub(crate) fn unmarshal<T>(de: impl SerDe, raw: &[u8]) -> Result<T, Box<dyn Error + Send + Sync>> where T: Sized + DeserializeOwned, { de.unmarshal(raw) }