mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-06-13 01:11:10 +00:00
Vivek Pandya
bc53b9a03a
* Change copyright year to 2023 from 2022 * Fix incorrect update of copyright year * Remove years from copy right header * Fix remaining files * Fix typo in a header and remove update-copyright.sh
106 lines
3.4 KiB
Rust
106 lines
3.4 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 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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//! Tool for creating the genesis block.
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use sc_client_api::{backend::Backend, BlockImportOperation};
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use sc_executor::RuntimeVersionOf;
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use sp_core::storage::Storage;
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use sp_runtime::{
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traits::{Block as BlockT, Hash as HashT, Header as HeaderT, Zero},
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BuildStorage,
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};
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use std::{marker::PhantomData, sync::Arc};
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/// Create a genesis block, given the initial storage.
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pub fn construct_genesis_block<Block: BlockT>(state_root: Block::Hash) -> Block {
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let extrinsics_root = <<<Block as BlockT>::Header as HeaderT>::Hashing as HashT>::trie_root(
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Vec::new(),
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sp_runtime::StateVersion::V0,
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);
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Block::new(
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<<Block as BlockT>::Header as HeaderT>::new(
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Zero::zero(),
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extrinsics_root,
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state_root,
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Default::default(),
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Default::default(),
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),
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Default::default(),
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)
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}
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/// Trait for building the genesis block.
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pub trait BuildGenesisBlock<Block: BlockT> {
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/// The import operation used to import the genesis block into the backend.
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type BlockImportOperation;
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/// Returns the built genesis block along with the block import operation
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/// after setting the genesis storage.
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fn build_genesis_block(self) -> sp_blockchain::Result<(Block, Self::BlockImportOperation)>;
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}
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/// Default genesis block builder in Substrate.
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pub struct GenesisBlockBuilder<Block: BlockT, B, E> {
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genesis_storage: Storage,
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commit_genesis_state: bool,
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backend: Arc<B>,
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executor: E,
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_phantom: PhantomData<Block>,
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}
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impl<Block: BlockT, B: Backend<Block>, E: RuntimeVersionOf> GenesisBlockBuilder<Block, B, E> {
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/// Constructs a new instance of [`GenesisBlockBuilder`].
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pub fn new(
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build_genesis_storage: &dyn BuildStorage,
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commit_genesis_state: bool,
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backend: Arc<B>,
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executor: E,
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) -> sp_blockchain::Result<Self> {
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let genesis_storage =
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build_genesis_storage.build_storage().map_err(sp_blockchain::Error::Storage)?;
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Ok(Self {
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genesis_storage,
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commit_genesis_state,
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backend,
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executor,
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_phantom: PhantomData::<Block>,
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})
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}
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}
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impl<Block: BlockT, B: Backend<Block>, E: RuntimeVersionOf> BuildGenesisBlock<Block>
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for GenesisBlockBuilder<Block, B, E>
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{
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type BlockImportOperation = <B as Backend<Block>>::BlockImportOperation;
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fn build_genesis_block(self) -> sp_blockchain::Result<(Block, Self::BlockImportOperation)> {
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let Self { genesis_storage, commit_genesis_state, backend, executor, _phantom } = self;
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let genesis_state_version =
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crate::resolve_state_version_from_wasm(&genesis_storage, &executor)?;
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let mut op = backend.begin_operation()?;
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let state_root =
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op.set_genesis_state(genesis_storage, commit_genesis_state, genesis_state_version)?;
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let genesis_block = construct_genesis_block::<Block>(state_root);
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Ok((genesis_block, op))
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}
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}
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