// This file is part of Substrate.

// Copyright (C) 2017-2022 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

//! Configuration of the networking layer.

use std::{fmt, str};

/// Name of a protocol, transmitted on the wire. Should be unique for each chain. Always UTF-8.
#[derive(Clone, PartialEq, Eq, Hash)]
pub struct ProtocolId(smallvec::SmallVec<[u8; 6]>);

impl<'a> From<&'a str> for ProtocolId {
	fn from(bytes: &'a str) -> ProtocolId {
		Self(bytes.as_bytes().into())
	}
}

impl AsRef<str> for ProtocolId {
	fn as_ref(&self) -> &str {
		str::from_utf8(&self.0[..])
			.expect("the only way to build a ProtocolId is through a UTF-8 String; qed")
	}
}

impl fmt::Debug for ProtocolId {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		fmt::Debug::fmt(self.as_ref(), f)
	}
}