mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Bastian Köcher
106 lines
3.6 KiB
Rust
106 lines
3.6 KiB
Rust
// Copyright 2019 Parity Technologies (UK) Ltd.
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// This file is part of Substrate.
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// Substrate 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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// Substrate 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 Cumulus. If not, see <http://www.gnu.org/licenses/>.
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//! A module that enables a runtime to work as parachain.
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#[cfg(not(feature = "std"))]
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use runtime_primitives::traits::{Block as BlockT, Header as HeaderT, One};
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#[cfg(not(feature = "std"))]
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use executive::ExecuteBlock;
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#[cfg(not(feature = "std"))]
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#[doc(hidden)]
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pub mod storage_functions;
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#[cfg(test)]
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mod tests;
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/// Register the `validate_block` function that is used by parachains to validate blocks on a validator.
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///
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/// Does *nothing* when `std` feature is enabled.
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///
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/// Expects as parameters the block and the block executor.
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///
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/// # Example
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///
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/// ```
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/// struct Block;
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/// struct BlockExecutor;
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///
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/// cumulus_runtime::register_validate_block!(Block, BlockExecutor);
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///
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/// # fn main() {}
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/// ```
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#[macro_export]
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macro_rules! register_validate_block {
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($block:ty, $block_executor:ty) => {
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$crate::register_validate_block_impl!($block, $block_executor);
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};
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}
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/// The actual implementation of `register_validate_block` for `no_std`.
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#[cfg(not(feature = "std"))]
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#[doc(hidden)]
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#[macro_export]
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macro_rules! register_validate_block_impl {
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($block:ty, $block_executor:ty) => {
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#[doc(hidden)]
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mod parachain_validate_block {
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use super::*;
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#[no_mangle]
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unsafe fn validate_block(block: *const u8, block_len: u64, prev_head: *const u8, prev_head_len: u64) {
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let block = $crate::slice::from_raw_parts(block, block_len as usize);
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let prev_head = $crate::slice::from_raw_parts(prev_head, prev_head_len as usize);
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$crate::validate_block::validate_block::<$block, $block_executor>(block, prev_head);
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}
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}
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};
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}
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/// The actual implementation of `register_validate_block` for `std`.
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#[cfg(feature = "std")]
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#[doc(hidden)]
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#[macro_export]
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macro_rules! register_validate_block_impl {
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($block:ty, $block_executor:ty) => {};
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}
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/// Validate a given parachain block on a validator.
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#[cfg(not(feature = "std"))]
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#[doc(hidden)]
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pub fn validate_block<Block: BlockT, E: ExecuteBlock<Block>>(mut block: &[u8], mut prev_head: &[u8]) {
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use codec::Decode;
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let block = crate::ParachainBlock::<Block>::decode(&mut block).expect("Could not decode parachain block.");
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let parent_header = <<Block as BlockT>::Header as Decode>::decode(&mut prev_head).expect("Could not decode parent header.");
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let _guard = unsafe {
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use storage_functions as storage;
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storage::STORAGE = Some(block.witness_data);
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(
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// Replace storage calls with our own implementations
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rio::ext_get_allocated_storage.replace_implementation(storage::ext_get_allocated_storage),
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rio::ext_get_storage_into.replace_implementation(storage::ext_get_storage_into),
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rio::ext_set_storage.replace_implementation(storage::ext_set_storage),
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rio::ext_exists_storage.replace_implementation(storage::ext_exists_storage),
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rio::ext_clear_storage.replace_implementation(storage::ext_clear_storage),
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)
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};
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let block_number = *parent_header.number() + One::one();
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E::execute_extrinsics_without_checks(block_number, block.extrinsics);
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} |