67 lines
2.3 KiB
Rust
67 lines
2.3 KiB
Rust
// This file is part of Substrate.
|
|
|
|
// Copyright (C) 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.
|
|
|
|
use sc_network::{
|
|
config::ProtocolId, request_responses::IncomingRequest, NetworkBackend, MAX_RESPONSE_SIZE,
|
|
};
|
|
use sp_runtime::traits::Block;
|
|
|
|
use std::time::Duration;
|
|
|
|
/// For incoming light client requests.
|
|
pub mod handler;
|
|
|
|
/// Generate the light client protocol name from the genesis hash and fork id.
|
|
fn generate_protocol_name<Hash: AsRef<[u8]>>(genesis_hash: Hash, fork_id: Option<&str>) -> String {
|
|
let genesis_hash = genesis_hash.as_ref();
|
|
if let Some(fork_id) = fork_id {
|
|
format!("/{}/{}/light/2", array_bytes::bytes2hex("", genesis_hash), fork_id)
|
|
} else {
|
|
format!("/{}/light/2", array_bytes::bytes2hex("", genesis_hash))
|
|
}
|
|
}
|
|
|
|
/// Generate the legacy light client protocol name from chain specific protocol identifier.
|
|
fn generate_legacy_protocol_name(protocol_id: &ProtocolId) -> String {
|
|
format!("/{}/light/2", protocol_id.as_ref())
|
|
}
|
|
|
|
/// Generates a `RequestResponseProtocolConfig` for the light client request protocol, refusing
|
|
/// incoming requests.
|
|
pub fn generate_protocol_config<
|
|
Hash: AsRef<[u8]>,
|
|
B: Block,
|
|
N: NetworkBackend<B, <B as Block>::Hash>,
|
|
>(
|
|
protocol_id: &ProtocolId,
|
|
genesis_hash: Hash,
|
|
fork_id: Option<&str>,
|
|
inbound_queue: async_channel::Sender<IncomingRequest>,
|
|
) -> N::RequestResponseProtocolConfig {
|
|
N::request_response_config(
|
|
generate_protocol_name(genesis_hash, fork_id).into(),
|
|
std::iter::once(generate_legacy_protocol_name(protocol_id).into()).collect(),
|
|
1 * 1024 * 1024,
|
|
MAX_RESPONSE_SIZE,
|
|
Duration::from_secs(15),
|
|
Some(inbound_queue),
|
|
)
|
|
}
|