// Rust Bitcoin Library
// Written in 2014 by
//     Andrew Poelstra <apoelstra@wpsoftware.net>
// To the extent possible under law, the author(s) have dedicated all
// copyright and related and neighboring rights to this software to
// the public domain worldwide. This software is distributed without
// any warranty.
//
// You should have received a copy of the CC0 Public Domain Dedication
// along with this software.
// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
//

//! Bitcoin Keys
//!
//! Keys used in Bitcoin that can be roundtrip (de)serialized.
//!

#[deprecated(since = "0.26.1", note = "Please use `util::ecdsa` instead")]
pub use util::ecdsa::{PrivateKey, PublicKey};

use core::fmt;
#[cfg(feature = "std")] use std::error;

use secp256k1;
use util::base58;

/// A key-related error.
#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub enum Error {
    /// Base58 encoding error
    Base58(base58::Error),
    /// secp256k1-related error
    Secp256k1(secp256k1::Error),
}


impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            Error::Base58(ref e) => write!(f, "Key base58 error: {}", e),
            Error::Secp256k1(ref e) => write!(f, "Key secp256k1 error: {}", e),
        }
    }
}

#[cfg(feature = "std")]
impl ::std::error::Error for Error {
    fn cause(&self) -> Option<&dyn error::Error> {
        match *self {
            Error::Base58(ref e) => Some(e),
            Error::Secp256k1(ref e) => Some(e),
        }
    }
}

#[doc(hidden)]
impl From<base58::Error> for Error {
    fn from(e: base58::Error) -> Error {
        Error::Base58(e)
    }
}

#[doc(hidden)]
impl From<secp256k1::Error> for Error {
    fn from(e: secp256k1::Error) -> Error {
        Error::Secp256k1(e)
    }
}