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// Copyright (c) Zefchain Labs, Inc.
// SPDX-License-Identifier: Apache-2.0

//! Extension traits with some common functionality.

use serde::{de::DeserializeOwned, Serialize};

/// Extension trait to deserialize a type from a vector of bytes using [`bcs`].
pub trait FromBcsBytes: Sized {
    /// Deserializes itself from a vector of bytes using [`bcs`].
    fn from_bcs_bytes(bytes: &[u8]) -> Result<Self, bcs::Error>;
}

impl<T> FromBcsBytes for T
where
    T: DeserializeOwned,
{
    fn from_bcs_bytes(bytes: &[u8]) -> Result<Self, bcs::Error> {
        bcs::from_bytes(bytes)
    }
}

/// Extension trait to serialize a type into a vector of bytes using [`bcs`].
pub trait ToBcsBytes {
    /// Serializes itself into a vector of bytes using [`bcs`].
    fn to_bcs_bytes(&self) -> Result<Vec<u8>, bcs::Error>;
}

impl<T> ToBcsBytes for T
where
    T: Serialize,
{
    fn to_bcs_bytes(&self) -> Result<Vec<u8>, bcs::Error> {
        bcs::to_bytes(self)
    }
}