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// Copyright 2017 Parity Technologies (UK) Ltd.
// This file is part of Polkadot.

// Polkadot 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.

// Polkadot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Polkadot.  If not, see <>.

//! Shareable Polkadot types.


#![cfg_attr(not(feature = "std"), no_std)]
#![cfg_attr(not(feature = "std"), feature(alloc))]

#[cfg(feature = "std")]
extern crate serde_derive;
#[cfg(feature = "std")]
extern crate serde;

extern crate substrate_runtime_std as rstd;
extern crate substrate_primitives as primitives;
extern crate substrate_serializer;

macro_rules! try_opt {
	($e: expr) => {
		match $e {
			Some(x) => x,
			None => return None,

pub mod parachain;
pub mod validator;
pub mod block;
pub mod transaction;

pub use self::block::{Header, Body, Block, Log, Digest};
pub use self::block::Number as BlockNumber;
pub use self::transaction::{Transaction, UncheckedTransaction, Function, InherentFunction, Proposal};

/// Virtual account ID that represents the idea of a dispatch/statement being signed by everybody
/// (who matters). Essentially this means that a majority of validators have decided it is
/// "correct".
pub const EVERYBODY: AccountId = [255u8; 32];

/// Alias to Ed25519 pubkey that identifies an account on the relay chain. This will almost
/// certainly continue to be the same as the substrate's `AuthorityId`.
pub type AccountId = primitives::AuthorityId;

/// The Ed25519 pub key of an session that belongs to an authority of the relay chain. This is
/// exactly equivalent to what the substrate calls an "authority".
pub type SessionKey = primitives::AuthorityId;

/// Indentifier for a chain.
pub type ChainID = u64;

/// Index of a transaction in the relay chain.
pub type TxOrder = u64;

/// A hash of some data used by the relay chain.
pub type Hash = primitives::H256;

/// Alias to 512-bit hash when used in the context of a signature on the relay chain.
pub type Signature = primitives::hash::H512;

/// A timestamp: seconds since the unix epoch.
pub type Timestamp = u64;