mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Bastian Köcher
46 lines
1.6 KiB
Rust
46 lines
1.6 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2019-2022 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//! Uncles functionality for Substrate.
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use sc_client_api::ProvideUncles;
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use sp_runtime::{generic::BlockId, traits::Block as BlockT};
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#[derive(Debug, thiserror::Error)]
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pub enum Error<B: BlockT> {
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#[error("Could not retrieve the block hash for block id: {0:?}")]
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NoHashForBlockId(BlockId<B>),
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}
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/// Maximum uncles generations we may provide to the runtime.
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const MAX_UNCLE_GENERATIONS: u32 = 8;
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/// Create a new [`sp_authorship::InherentDataProvider`] at the given block.
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pub fn create_uncles_inherent_data_provider<B, C>(
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client: &C,
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parent: B::Hash,
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) -> Result<sp_authorship::InherentDataProvider<B::Header>, sc_client_api::blockchain::Error>
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where
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B: BlockT,
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C: ProvideUncles<B>,
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{
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let uncles = client.uncles(parent, MAX_UNCLE_GENERATIONS.into())?;
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Ok(sp_authorship::InherentDataProvider::new(uncles))
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}
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