bitcoin_num 0.2.3

Numeric functions & traits used by rust bitcoin, bitcoin_hashes and other packages, supporting rustc 1.29.0
Documentation 
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// Bitcoin Numeric Library
// Written in 2018 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/>.
//

use hex;
use std::error;

impl error::Error for hex::Error {
    fn cause(&self) -> Option<&error::Error> {
        None
    }
    fn description(&self) -> &str {
        "`std::error::description` is deprecated"
    }
}