//! The Substrate Node Template runtime. This can be compiled with `#[no_std]`, ready for Wasm.

#![cfg_attr(not(feature = "std"), no_std)]
// `construct_runtime!` does a lot of recursion and requires us to increase the limit to 256.
#![recursion_limit="256"]

// Make the WASM binary available.
#[cfg(feature = "std")]
include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));

use rstd::prelude::*;
use primitives::{ed25519, sr25519, OpaqueMetadata};
use sr_primitives::{ApplyResult, transaction_validity::TransactionValidity, generic, create_runtime_str};
use sr_primitives::traits::{NumberFor, BlakeTwo256, Block as BlockT, StaticLookup, Verify, ConvertInto};
use sr_primitives::weights::Weight;
use client::{
	block_builder::api::{CheckInherentsResult, InherentData, self as block_builder_api},
	runtime_api, impl_runtime_apis
};
use version::RuntimeVersion;
#[cfg(feature = "std")]
use version::NativeVersion;

// A few exports that help ease life for downstream crates.
#[cfg(any(feature = "std", test))]
pub use sr_primitives::BuildStorage;
pub use timestamp::Call as TimestampCall;
pub use balances::Call as BalancesCall;
pub use sr_primitives::{Permill, Perbill};
pub use support::{StorageValue, construct_runtime, parameter_types};

/// Alias to the signature scheme used for Aura authority signatures.
pub type AuraSignature = ed25519::Signature;

/// The Ed25519 pub key of an session that belongs to an Aura authority of the chain.
pub type AuraId = ed25519::Public;

/// Alias to pubkey that identifies an account on the chain.
pub type AccountId = <AccountSignature as Verify>::Signer;

/// The type used by authorities to prove their ID.
pub type AccountSignature = sr25519::Signature;

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

/// Index of a block number in the chain.
pub type BlockNumber = u64;

/// Index of an account's extrinsic in the chain.
pub type Nonce = u64;

/// Balance type for the node.
pub type Balance = u128;

/// Used for the module template in `./template.rs`
mod template;

/// Opaque types. These are used by the CLI to instantiate machinery that don't need to know
/// the specifics of the runtime. They can then be made to be agnostic over specific formats
/// of data like extrinsics, allowing for them to continue syncing the network through upgrades
/// to even the core datastructures.
pub mod opaque {
	use super::*;

	pub use sr_primitives::OpaqueExtrinsic as UncheckedExtrinsic;

	/// Opaque block header type.
	pub type Header = generic::Header<BlockNumber, BlakeTwo256>;
	/// Opaque block type.
	pub type Block = generic::Block<Header, UncheckedExtrinsic>;
	/// Opaque block identifier type.
	pub type BlockId = generic::BlockId<Block>;
	/// Opaque session key type.
	pub type SessionKey = AuraId;
}

/// This runtime version.
pub const VERSION: RuntimeVersion = RuntimeVersion {
	spec_name: create_runtime_str!("node-template"),
	impl_name: create_runtime_str!("node-template"),
	authoring_version: 3,
	spec_version: 4,
	impl_version: 4,
	apis: RUNTIME_API_VERSIONS,
};

/// The version infromation used to identify this runtime when compiled natively.
#[cfg(feature = "std")]
pub fn native_version() -> NativeVersion {
	NativeVersion {
		runtime_version: VERSION,
		can_author_with: Default::default(),
	}
}

parameter_types! {
	pub const BlockHashCount: BlockNumber = 250;
	pub const MaximumBlockWeight: Weight = 1_000_000;
	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
	pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
}

impl system::Trait for Runtime {
	/// The identifier used to distinguish between accounts.
	type AccountId = AccountId;
	/// The lookup mechanism to get account ID from whatever is passed in dispatchers.
	type Lookup = Indices;
	/// The index type for storing how many extrinsics an account has signed.
	type Index = Nonce;
	/// The index type for blocks.
	type BlockNumber = BlockNumber;
	/// The type for hashing blocks and tries.
	type Hash = Hash;
	/// The hashing algorithm used.
	type Hashing = BlakeTwo256;
	/// The header type.
	type Header = generic::Header<BlockNumber, BlakeTwo256>;
	/// The ubiquitous event type.
	type Event = Event;
	/// Update weight (to fee) multiplier per-block.
	type WeightMultiplierUpdate = ();
	/// The ubiquitous origin type.
	type Origin = Origin;
	/// Maximum number of block number to block hash mappings to keep (oldest pruned first).
	type BlockHashCount = BlockHashCount;
	/// Maximum weight of each block. With a default weight system of 1byte == 1weight, 4mb is ok.
	type MaximumBlockWeight = MaximumBlockWeight;
	/// Maximum size of all encoded transactions (in bytes) that are allowed in one block.
	type MaximumBlockLength = MaximumBlockLength;
	/// Portion of the block weight that is available to all normal transactions.
	type AvailableBlockRatio = AvailableBlockRatio;
}

impl aura::Trait for Runtime {
	type HandleReport = ();
	type AuthorityId = AuraId;
}

impl indices::Trait for Runtime {
	/// The type for recording indexing into the account enumeration. If this ever overflows, there
	/// will be problems!
	type AccountIndex = u32;
	/// Use the standard means of resolving an index hint from an id.
	type ResolveHint = indices::SimpleResolveHint<Self::AccountId, Self::AccountIndex>;
	/// Determine whether an account is dead.
	type IsDeadAccount = Balances;
	/// The ubiquitous event type.
	type Event = Event;
}

parameter_types! {
	pub const MinimumPeriod: u64 = 5000;
}
impl timestamp::Trait for Runtime {
	/// A timestamp: milliseconds since the unix epoch.
	type Moment = u64;
	type OnTimestampSet = Aura;
	type MinimumPeriod = MinimumPeriod;
}

parameter_types! {
	pub const ExistentialDeposit: u128 = 500;
	pub const TransferFee: u128 = 0;
	pub const CreationFee: u128 = 0;
	pub const TransactionBaseFee: u128 = 0;
	pub const TransactionByteFee: u128 = 1;
}

impl balances::Trait for Runtime {
	/// The type for recording an account's balance.
	type Balance = Balance;
	/// What to do if an account's free balance gets zeroed.
	type OnFreeBalanceZero = ();
	/// What to do if a new account is created.
	type OnNewAccount = Indices;
	/// The ubiquitous event type.
	type Event = Event;

	type TransactionPayment = ();
	type DustRemoval = ();
	type TransferPayment = ();
	type ExistentialDeposit = ExistentialDeposit;
	type TransferFee = TransferFee;
	type CreationFee = CreationFee;
	type TransactionBaseFee = TransactionBaseFee;
	type TransactionByteFee = TransactionByteFee;
	type WeightToFee = ConvertInto;
}

impl sudo::Trait for Runtime {
	/// The ubiquitous event type.
	type Event = Event;
	type Proposal = Call;
}

/// Used for the module template in `./template.rs`
impl template::Trait for Runtime {
	type Event = Event;
}

construct_runtime!(
	pub enum Runtime where
		Block = Block,
		NodeBlock = opaque::Block,
		UncheckedExtrinsic = UncheckedExtrinsic
	{
		System: system::{Module, Call, Storage, Config, Event},
		Timestamp: timestamp::{Module, Call, Storage, Inherent},
		Aura: aura::{Module, Config<T>, Inherent(Timestamp)},
		Indices: indices::{default, Config<T>},
		Balances: balances,
		Sudo: sudo,
		// Used for the module template in `./template.rs`
		TemplateModule: template::{Module, Call, Storage, Event<T>},
	}
);

/// The type used as a helper for interpreting the sender of transactions.
type Context = system::ChainContext<Runtime>;
/// The address format for describing accounts.
type Address = <Indices as StaticLookup>::Source;
/// Block header type as expected by this runtime.
pub type Header = generic::Header<BlockNumber, BlakeTwo256>;
/// Block type as expected by this runtime.
pub type Block = generic::Block<Header, UncheckedExtrinsic>;
/// BlockId type as expected by this runtime.
pub type BlockId = generic::BlockId<Block>;
/// The SignedExtension to the basic transaction logic.
pub type SignedExtra = (system::CheckNonce<Runtime>, system::CheckWeight<Runtime>, balances::TakeFees<Runtime>);
/// Unchecked extrinsic type as expected by this runtime.
pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Call, AccountSignature, SignedExtra>;
/// Extrinsic type that has already been checked.
pub type CheckedExtrinsic = generic::CheckedExtrinsic<AccountId, Call, SignedExtra>;
/// Executive: handles dispatch to the various modules.
pub type Executive = executive::Executive<Runtime, Block, Context, Runtime, AllModules>;

// Implement our runtime API endpoints. This is just a bunch of proxying.
impl_runtime_apis! {
	impl runtime_api::Core<Block> for Runtime {
		fn version() -> RuntimeVersion {
			VERSION
		}

		fn execute_block(block: Block) {
			Executive::execute_block(block)
		}

		fn initialize_block(header: &<Block as BlockT>::Header) {
			Executive::initialize_block(header)
		}
	}

	impl runtime_api::Metadata<Block> for Runtime {
		fn metadata() -> OpaqueMetadata {
			Runtime::metadata().into()
		}
	}

	impl block_builder_api::BlockBuilder<Block> for Runtime {
		fn apply_extrinsic(extrinsic: <Block as BlockT>::Extrinsic) -> ApplyResult {
			Executive::apply_extrinsic(extrinsic)
		}

		fn finalize_block() -> <Block as BlockT>::Header {
			Executive::finalize_block()
		}

		fn inherent_extrinsics(data: InherentData) -> Vec<<Block as BlockT>::Extrinsic> {
			data.create_extrinsics()
		}

		fn check_inherents(block: Block, data: InherentData) -> CheckInherentsResult {
			data.check_extrinsics(&block)
		}

		fn random_seed() -> <Block as BlockT>::Hash {
			System::random_seed()
		}
	}

	impl runtime_api::TaggedTransactionQueue<Block> for Runtime {
		fn validate_transaction(tx: <Block as BlockT>::Extrinsic) -> TransactionValidity {
			Executive::validate_transaction(tx)
		}
	}

	impl consensus_aura::AuraApi<Block, AuraId> for Runtime {
		fn slot_duration() -> u64 {
			Aura::slot_duration()
		}
		fn authorities() -> Vec<AuraId> {
			Aura::authorities()
		}
	}

	impl offchain_primitives::OffchainWorkerApi<Block> for Runtime {
		fn offchain_worker(n: NumberFor<Block>) {
			Executive::offchain_worker(n)
		}
	}
}
