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// This file is part of Substrate.

// Copyright (C) 2020-2021 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/>.

//! Helpers for outgoing and incoming light client requests.

/// For incoming light client requests.
pub mod handler;

use crate::{config::ProtocolId, request_responses::ProtocolConfig};

use std::time::Duration;

/// Generate the light client protocol name from chain specific protocol identifier.
fn generate_protocol_name(protocol_id: &ProtocolId) -> String {
	let mut s = String::new();
	s.push_str("/");
	s.push_str(protocol_id.as_ref());
	s.push_str("/light/2");
	s
}

/// Generates a [`ProtocolConfig`] for the light client request protocol, refusing incoming
/// requests.
pub fn generate_protocol_config(protocol_id: &ProtocolId) -> ProtocolConfig {
	ProtocolConfig {
		name: generate_protocol_name(protocol_id).into(),
		max_request_size: 1 * 1024 * 1024,
		max_response_size: 16 * 1024 * 1024,
		request_timeout: Duration::from_secs(15),
		inbound_queue: None,
	}
}