mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-27 01:07:57 +00:00
Bastian Köcher
e3e651f72c
* Happy new year Updates the copyright years and fixes wrong license headers. * Fix the template * Split HEADER into HEADER-APACHE & HEADER-GPL
92 lines
2.9 KiB
Rust
92 lines
2.9 KiB
Rust
// This file is part of Substrate.
|
|
|
|
// Copyright (C) 2019-2021 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/>.
|
|
|
|
//! Substrate client interfaces.
|
|
#![warn(missing_docs)]
|
|
|
|
pub mod backend;
|
|
pub mod call_executor;
|
|
pub mod client;
|
|
pub mod cht;
|
|
pub mod execution_extensions;
|
|
pub mod in_mem;
|
|
pub mod light;
|
|
pub mod leaves;
|
|
pub mod notifications;
|
|
pub mod proof_provider;
|
|
|
|
pub use sp_blockchain as blockchain;
|
|
pub use backend::*;
|
|
pub use notifications::*;
|
|
pub use call_executor::*;
|
|
pub use client::*;
|
|
pub use light::*;
|
|
pub use notifications::*;
|
|
pub use proof_provider::*;
|
|
|
|
pub use sp_state_machine::{StorageProof, ExecutionStrategy};
|
|
|
|
/// Usage Information Provider interface
|
|
///
|
|
pub trait UsageProvider<Block: sp_runtime::traits::Block> {
|
|
/// Get usage info about current client.
|
|
fn usage_info(&self) -> ClientInfo<Block>;
|
|
}
|
|
|
|
/// Utility methods for the client.
|
|
pub mod utils {
|
|
use sp_blockchain::{HeaderBackend, HeaderMetadata, Error};
|
|
use sp_runtime::traits::Block as BlockT;
|
|
use std::borrow::Borrow;
|
|
|
|
/// Returns a function for checking block ancestry, the returned function will
|
|
/// return `true` if the given hash (second parameter) is a descendent of the
|
|
/// base (first parameter). If the `current` parameter is defined, it should
|
|
/// represent the current block `hash` and its `parent hash`, if given the
|
|
/// function that's returned will assume that `hash` isn't part of the local DB
|
|
/// yet, and all searches in the DB will instead reference the parent.
|
|
pub fn is_descendent_of<'a, Block: BlockT, T>(
|
|
client: &'a T,
|
|
current: Option<(Block::Hash, Block::Hash)>,
|
|
) -> impl Fn(&Block::Hash, &Block::Hash) -> Result<bool, Error> + 'a
|
|
where T: HeaderBackend<Block> + HeaderMetadata<Block, Error = Error>,
|
|
{
|
|
move |base, hash| {
|
|
if base == hash { return Ok(false); }
|
|
|
|
let current = current.as_ref().map(|(c, p)| (c.borrow(), p.borrow()));
|
|
|
|
let mut hash = hash;
|
|
if let Some((current_hash, current_parent_hash)) = current {
|
|
if base == current_hash { return Ok(false); }
|
|
if hash == current_hash {
|
|
if base == current_parent_hash {
|
|
return Ok(true);
|
|
} else {
|
|
hash = current_parent_hash;
|
|
}
|
|
}
|
|
}
|
|
|
|
let ancestor = sp_blockchain::lowest_common_ancestor(client, *hash, *base)?;
|
|
|
|
Ok(ancestor.hash == *base)
|
|
}
|
|
}
|
|
}
|