// Copyright 2019-2021 Parity Technologies (UK) Ltd.
// This file is part of Substrate.

// Substrate 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.

// Substrate 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 Cumulus. If not, see <http://www.gnu.org/licenses/>.

//! A module that enables a runtime to work as parachain.

#[cfg(not(feature = "std"))]
#[doc(hidden)]
pub mod implementation;
#[cfg(test)]
mod tests;

#[cfg(not(feature = "std"))]
#[doc(hidden)]
pub use bytes;
#[cfg(not(feature = "std"))]
#[doc(hidden)]
pub use codec::decode_from_bytes;
#[cfg(not(feature = "std"))]
#[doc(hidden)]
pub use polkadot_parachain;
#[cfg(not(feature = "std"))]
#[doc(hidden)]
pub use sp_runtime::traits::GetRuntimeBlockType;
#[cfg(not(feature = "std"))]
#[doc(hidden)]
pub use sp_std;

/// Basically the same as [`ValidationParams`](polkadot_parachain::primitives::ValidationParams),
/// but a little bit optimized for our use case here.
///
/// `block_data` and `head_data` are represented as [`bytes::Bytes`] to make them reuse
/// the memory of the input parameter of the exported `validate_blocks` function.
///
/// The layout of this type must match exactly the layout of
/// [`ValidationParams`](polkadot_parachain::primitives::ValidationParams) to have the same
/// SCALE encoding.
#[derive(codec::Decode)]
#[cfg_attr(feature = "std", derive(codec::Encode))]
#[doc(hidden)]
pub struct MemoryOptimizedValidationParams {
	pub parent_head: bytes::Bytes,
	pub block_data: bytes::Bytes,
	pub relay_parent_number: cumulus_primitives_core::relay_chain::BlockNumber,
	pub relay_parent_storage_root: cumulus_primitives_core::relay_chain::Hash,
}