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/*
 * Copyright 2018 Bitwise IO, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * -----------------------------------------------------------------------------
 */

//! Errors that can occur during the signing process.

use std::error::Error as StdError;

#[derive(Debug)]
pub enum Error {
    SigningError(String),
}

impl StdError for Error {
    fn description(&self) -> &str {
        match *self {
            Error::SigningError(ref msg) => msg,
        }
    }

    fn cause(&self) -> Option<&StdError> {
        match *self {
            Error::SigningError(_) => None,
        }
    }
}

impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match *self {
            Error::SigningError(ref s) => write!(f, "SigningError: {}", s),
        }
    }
}