use crate::{error::SendSyncError, ErrorKind};

/// A provider of encryption for blocks of data.

pub trait Vault: std::fmt::Debug + Send + Sync + 'static {

    /// The error type that the vault can produce.

    type Error: SendSyncError;

    /// Encrypts `payload`, returning a new buffer that contains all information

    /// necessary to decrypt it in the future.

    fn encrypt(&self, payload: &[u8]) -> Result<Vec<u8>, Self::Error>;

    /// Decrypts a previously encrypted `payload`, returning the decrypted

    /// information.

    fn decrypt(&self, payload: &[u8]) -> Result<Vec<u8>, Self::Error>;

}

/// A [`Vault`] that can be boxed.

pub trait AnyVault: std::fmt::Debug + Send + Sync + 'static {

    /// Encrypts `payload`, returning a new buffer that contains all information

    /// necessary to decrypt it in the future.

    fn encrypt(&self, payload: &[u8]) -> Result<Vec<u8>, crate::Error>;

    /// Decrypts a previously encrypted `payload`, returning the decrypted

    /// information.

    fn decrypt(&self, payload: &[u8]) -> Result<Vec<u8>, crate::Error>;

}

impl<T, E> AnyVault for T

where

    T: Vault<Error = E> + std::fmt::Debug,

    E: SendSyncError,

{

}