im-online: use generic crypto (#3500)

* im-online: support using ed25519 and sr25519 crypto

* app-crypto: add trait bounds to RuntimePublic::Signature

* im-online: add missing type annotations

* authority-discovery: depend on im-online module and use its crypto

* node: set i'm online crypto to sr25519

* node: bump spec_version

* rpc: don't generate i'm online pubkey in insert_key method

* im-online: fix docs

* im-online: move app crypto packages

* aura: move app crypto packages

substrate/Cargo.lock

@@ -3826,6 +3826,7 @@ dependencies = [
  "serde 1.0.97 (registry+https://github.com/rust-lang/crates.io-index)",
  "sr-io 2.0.0",
  "sr-primitives 2.0.0",
+ "sr-staking-primitives 2.0.0",
  "sr-std 2.0.0",
  "srml-im-online 0.1.0",
  "srml-session 2.0.0",

substrate/core/application-crypto/src/traits.rs

@@ -17,6 +17,7 @@
 use primitives::crypto::{KeyTypeId, CryptoType, IsWrappedBy, Public};
 #[cfg(feature = "std")]
 use primitives::crypto::Pair;
+use codec::Codec;
 
 /// An application-specific key.
 pub trait AppKey: 'static + Send + Sync + Sized + CryptoType + Clone {
@@ -72,7 +73,7 @@ pub trait AppSignature: AppKey + Eq + PartialEq + MaybeDebugHash {
 /// A runtime interface for a public key.
 pub trait RuntimePublic: Sized {
 	/// The signature that will be generated when signing with the corresponding private key.
-	type Signature;
+	type Signature: Codec + MaybeDebugHash + Eq + PartialEq + Clone;
 
 	/// Returns all public keys for the given key type in the keystore.
 	fn all(key_type: KeyTypeId) -> crate::Vec<Self>;
@@ -97,7 +98,7 @@ pub trait RuntimePublic: Sized {
 /// A runtime interface for an application's public key.
 pub trait RuntimeAppPublic: Sized {
 	/// The signature that will be generated when signing with the corresponding private key.
-	type Signature;
+	type Signature: Codec + MaybeDebugHash + Eq + PartialEq + Clone;
 
 	/// Returns all public keys for this application in the keystore.
 	fn all() -> crate::Vec<Self>;

substrate/core/consensus/aura/primitives/src/lib.rs

@@ -23,38 +23,38 @@ use substrate_client::decl_runtime_apis;
 use rstd::vec::Vec;
 use sr_primitives::ConsensusEngineId;
 
-mod app_sr25519 {
-	use app_crypto::{app_crypto, key_types::AURA, sr25519};
-	app_crypto!(sr25519, AURA);
-}
-
 pub mod sr25519 {
+	mod app_sr25519 {
+		use app_crypto::{app_crypto, key_types::AURA, sr25519};
+		app_crypto!(sr25519, AURA);
+	}
+
 	/// An Aura authority keypair using S/R 25519 as its crypto.
 	#[cfg(feature = "std")]
-	pub type AuthorityPair = super::app_sr25519::Pair;
+	pub type AuthorityPair = app_sr25519::Pair;
 
 	/// An Aura authority signature using S/R 25519 as its crypto.
-	pub type AuthoritySignature = super::app_sr25519::Signature;
+	pub type AuthoritySignature = app_sr25519::Signature;
 
 	/// An Aura authority identifier using S/R 25519 as its crypto.
-	pub type AuthorityId = super::app_sr25519::Public;
+	pub type AuthorityId = app_sr25519::Public;
-}
-
-mod app_ed25519 {
-	use app_crypto::{app_crypto, key_types::AURA, ed25519};
-	app_crypto!(ed25519, AURA);
 }
 
 pub mod ed25519 {
+	mod app_ed25519 {
+		use app_crypto::{app_crypto, key_types::AURA, ed25519};
+		app_crypto!(ed25519, AURA);
+	}
+
 	/// An Aura authority keypair using Ed25519 as its crypto.
 	#[cfg(feature = "std")]
-	pub type AuthorityPair = super::app_ed25519::Pair;
+	pub type AuthorityPair = app_ed25519::Pair;
 
 	/// An Aura authority signature using Ed25519 as its crypto.
-	pub type AuthoritySignature = super::app_ed25519::Signature;
+	pub type AuthoritySignature = app_ed25519::Signature;
 
 	/// An Aura authority identifier using Ed25519 as its crypto.
-	pub type AuthorityId = super::app_ed25519::Public;
+	pub type AuthorityId = app_ed25519::Public;
 }
 
 /// The `ConsensusEngineId` of AuRa.

substrate/core/rpc/src/author/mod.rs

@@ -162,7 +162,7 @@ impl<B, E, P, RA> AuthorApi<ExHash<P>, BlockHash<P>> for Author<B, E, P, RA> whe
 			Some(public) => public.0,
 			None => {
 				let maybe_public = match key_type {
-					key_types::BABE | key_types::IM_ONLINE | key_types::SR25519 =>
+					key_types::BABE | key_types::SR25519 =>
 						sr25519::Pair::from_string(&suri, maybe_password)
 							.map(|pair| pair.public().to_raw_vec()),
 					key_types::GRANDPA | key_types::ED25519 =>

substrate/node/cli/src/chain_spec.rs

@@ -30,7 +30,7 @@ use hex_literal::hex;
 use substrate_telemetry::TelemetryEndpoints;
 use grandpa_primitives::{AuthorityId as GrandpaId};
 use babe_primitives::{AuthorityId as BabeId};
-use im_online::AuthorityId as ImOnlineId;
+use im_online::sr25519::{AuthorityId as ImOnlineId};
 use sr_primitives::Perbill;
 
 const STAGING_TELEMETRY_URL: &str = "wss://telemetry.polkadot.io/submit/";

substrate/node/runtime/src/lib.rs

@@ -47,7 +47,7 @@ use elections::VoteIndex;
 use version::NativeVersion;
 use primitives::OpaqueMetadata;
 use grandpa::{AuthorityId as GrandpaId, AuthorityWeight as GrandpaWeight};
-use im_online::{AuthorityId as ImOnlineId};
+use im_online::sr25519::{AuthorityId as ImOnlineId};
 
 #[cfg(any(feature = "std", test))]
 pub use sr_primitives::BuildStorage;
@@ -79,7 +79,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// and set impl_version to equal spec_version. If only runtime
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
-	spec_version: 153,
+	spec_version: 154,
 	impl_version: 154,
 	apis: RUNTIME_API_VERSIONS,
 };
@@ -393,6 +393,7 @@ impl sudo::Trait for Runtime {
 }
 
 impl im_online::Trait for Runtime {
+	type AuthorityId = ImOnlineId;
 	type Call = Call;
 	type Event = Event;
 	type UncheckedExtrinsic = UncheckedExtrinsic;
@@ -447,8 +448,8 @@ construct_runtime!(
 		Treasury: treasury::{Module, Call, Storage, Event<T>},
 		Contracts: contracts,
 		Sudo: sudo,
-		ImOnline: im_online::{Module, Call, Storage, Event, ValidateUnsigned, Config},
+		ImOnline: im_online::{Module, Call, Storage, Event<T>, ValidateUnsigned, Config<T>},
-		AuthorityDiscovery: authority_discovery::{Module, Call, Config},
+		AuthorityDiscovery: authority_discovery::{Module, Call, Config<T>},
 		Offences: offences::{Module, Call, Storage, Event},
 	}
 );
@@ -578,19 +579,19 @@ impl_runtime_apis! {
 		}
 	}
 
-	impl authority_discovery_primitives::AuthorityDiscoveryApi<Block, im_online::AuthorityId> for Runtime {
+	impl authority_discovery_primitives::AuthorityDiscoveryApi<Block, ImOnlineId> for Runtime {
-		fn authority_id() -> Option<im_online::AuthorityId> {
+		fn authority_id() -> Option<ImOnlineId> {
 			AuthorityDiscovery::authority_id()
 		}
-		fn authorities() -> Vec<im_online::AuthorityId> {
+		fn authorities() -> Vec<ImOnlineId> {
 			AuthorityDiscovery::authorities()
 		}
 
-		fn sign(payload: Vec<u8>, authority_id: im_online::AuthorityId) -> Option<Vec<u8>> {
+		fn sign(payload: Vec<u8>, authority_id: ImOnlineId) -> Option<Vec<u8>> {
 			AuthorityDiscovery::sign(payload, authority_id)
 		}
 
-		fn verify(payload: Vec<u8>, signature: Vec<u8>, public_key: im_online::AuthorityId) -> bool {
+		fn verify(payload: Vec<u8>, signature: Vec<u8>, public_key: ImOnlineId) -> bool {
 			AuthorityDiscovery::verify(payload, signature, public_key)
 		}
 	}

substrate/srml/authority-discovery/Cargo.toml

@@ -17,6 +17,9 @@ srml-support = { path = "../support", default-features = false }
 sr-io = { package = "sr-io", path = "../../core/sr-io", default-features = false }
 system = { package = "srml-system", path = "../system", default-features = false }
 
+[dev-dependencies]
+sr-staking-primitives = { path = "../../core/sr-staking-primitives", default-features = false }
+
 [features]
 default = ["std"]
 std = [

substrate/srml/authority-discovery/src/lib.rs

@@ -33,18 +33,20 @@ use codec::{Decode, Encode};
 use rstd::prelude::*;
 use srml_support::{decl_module, decl_storage, StorageValue};
 
-pub trait Trait: system::Trait + session::Trait {}
+pub trait Trait: system::Trait + session::Trait + im_online::Trait {}
+
+type AuthorityIdFor<T> = <T as im_online::Trait>::AuthorityId;
 
 decl_storage! {
 	trait Store for Module<T: Trait> as AuthorityDiscovery {
 		/// The current set of keys that may issue a heartbeat.
-		Keys get(keys): Vec<im_online::AuthorityId>;
+		Keys get(keys): Vec<AuthorityIdFor<T>>;
 	}
 	add_extra_genesis {
-		config(keys): Vec<im_online::AuthorityId>;
+		config(keys): Vec<AuthorityIdFor<T>>;
 		build(|
 			  storage: &mut (sr_primitives::StorageOverlay, sr_primitives::ChildrenStorageOverlay),
-			  config: &GenesisConfig
+			  config: &GenesisConfig<T>,
 			  | {
 				  sr_io::with_storage(
 					  storage,
@@ -64,10 +66,10 @@ impl<T: Trait> Module<T> {
 	/// set, otherwise this function returns None. The restriction might be
 	/// softened in the future in case a consumer needs to learn own authority
 	/// identifier.
-	pub fn authority_id() -> Option<im_online::AuthorityId> {
+	pub fn authority_id() -> Option<AuthorityIdFor<T>> {
-		let authorities = Keys::get();
+		let authorities = Keys::<T>::get();
 
-		let local_keys = im_online::AuthorityId::all();
+		let local_keys = <AuthorityIdFor<T>>::all();
 
 		authorities.into_iter().find_map(|authority| {
 			if local_keys.contains(&authority) {
@@ -79,12 +81,12 @@ impl<T: Trait> Module<T> {
 	}
 
 	/// Retrieve authority identifiers of the current authority set.
-	pub fn authorities() -> Vec<im_online::AuthorityId> {
+	pub fn authorities() -> Vec<AuthorityIdFor<T>> {
-		Keys::get()
+		Keys::<T>::get()
 	}
 
 	/// Sign the given payload with the private key corresponding to the given authority id.
-	pub fn sign(payload: Vec<u8>, authority_id: im_online::AuthorityId) -> Option<Vec<u8>> {
+	pub fn sign(payload: Vec<u8>, authority_id: AuthorityIdFor<T>) -> Option<Vec<u8>> {
 		authority_id.sign(&payload).map(|s| s.encode())
 	}
 
@@ -93,27 +95,27 @@ impl<T: Trait> Module<T> {
 	pub fn verify(
 		payload: Vec<u8>,
 		signature: Vec<u8>,
-		authority_id: im_online::AuthorityId,
+		authority_id: AuthorityIdFor<T>,
 	) -> bool {
-		im_online::AuthoritySignature::decode(&mut &signature[..])
+		<AuthorityIdFor<T> as RuntimeAppPublic>::Signature::decode(&mut &signature[..])
 			.map(|s| authority_id.verify(&payload, &s))
 			.unwrap_or(false)
 	}
 
-	fn initialize_keys(keys: &[im_online::AuthorityId]) {
+	fn initialize_keys(keys: &[AuthorityIdFor<T>]) {
 		if !keys.is_empty() {
-			assert!(Keys::get().is_empty(), "Keys are already initialized!");
+			assert!(Keys::<T>::get().is_empty(), "Keys are already initialized!");
-			Keys::put_ref(keys);
+			Keys::<T>::put_ref(keys);
 		}
 	}
 }
 
 impl<T: Trait> session::OneSessionHandler<T::AccountId> for Module<T> {
-	type Key = im_online::AuthorityId;
+	type Key = AuthorityIdFor<T>;
 
 	fn on_genesis_session<'a, I: 'a>(validators: I)
 	where
-		I: Iterator<Item = (&'a T::AccountId, im_online::AuthorityId)>,
+		I: Iterator<Item = (&'a T::AccountId, Self::Key)>,
 	{
 		let keys = validators.map(|x| x.1).collect::<Vec<_>>();
 		Self::initialize_keys(&keys);
@@ -121,10 +123,10 @@ impl<T: Trait> session::OneSessionHandler<T::AccountId> for Module<T> {
 
 	fn on_new_session<'a, I: 'a>(_changed: bool, _validators: I, next_validators: I)
 	where
-		I: Iterator<Item = (&'a T::AccountId, im_online::AuthorityId)>,
+		I: Iterator<Item = (&'a T::AccountId, Self::Key)>,
 	{
 		// Remember who the authorities are for the new session.
-		Keys::put(next_validators.map(|x| x.1).collect::<Vec<_>>());
+		Keys::<T>::put(next_validators.map(|x| x.1).collect::<Vec<_>>());
 	}
 
 	fn on_disabled(_i: usize) {
@@ -139,9 +141,11 @@ mod tests {
 	use primitives::testing::KeyStore;
 	use primitives::{crypto::key_types, sr25519, traits::BareCryptoStore, H256};
 	use sr_io::{with_externalities, TestExternalities};
+	use sr_primitives::generic::UncheckedExtrinsic;
 	use sr_primitives::testing::{Header, UintAuthorityId};
 	use sr_primitives::traits::{ConvertInto, IdentityLookup, OpaqueKeys};
 	use sr_primitives::Perbill;
+	use sr_staking_primitives::CurrentElectedSet;
 	use srml_support::{impl_outer_origin, parameter_types};
 
 	type AuthorityDiscovery = Module<Test>;
@@ -151,12 +155,21 @@ mod tests {
 	pub struct Test;
 	impl Trait for Test {}
 
+	type AuthorityId = im_online::sr25519::AuthorityId;
+
+	pub struct DummyCurrentElectedSet<T>(std::marker::PhantomData<T>);
+	impl<T> CurrentElectedSet<T> for DummyCurrentElectedSet<T> {
+		fn current_elected_set() -> Vec<T> {
+			vec![]
+		}
+	}
+
 	pub struct TestOnSessionEnding;
-	impl session::OnSessionEnding<im_online::AuthorityId> for TestOnSessionEnding {
+	impl session::OnSessionEnding<AuthorityId> for TestOnSessionEnding {
 		fn on_session_ending(
 			_: SessionIndex,
 			_: SessionIndex,
-		) -> Option<Vec<im_online::AuthorityId>> {
+		) -> Option<Vec<AuthorityId>> {
 			None
 		}
 	}
@@ -167,11 +180,25 @@ mod tests {
 		type ShouldEndSession = session::PeriodicSessions<Period, Offset>;
 		type SessionHandler = TestSessionHandler;
 		type Event = ();
-		type ValidatorId = im_online::AuthorityId;
+		type ValidatorId = AuthorityId;
 		type ValidatorIdOf = ConvertInto;
 		type SelectInitialValidators = ();
 	}
 
+	impl session::historical::Trait for Test {
+		type FullIdentification = ();
+		type FullIdentificationOf = ();
+	}
+
+	impl im_online::Trait for Test {
+		type AuthorityId = AuthorityId;
+		type Call = im_online::Call<Test>;
+		type Event = ();
+		type UncheckedExtrinsic = UncheckedExtrinsic<(), im_online::Call<Test>, (), ()>;
+		type ReportUnresponsiveness = ();
+		type CurrentElectedSet = DummyCurrentElectedSet<AuthorityId>;
+	}
+
 	pub type BlockNumber = u64;
 
 	parameter_types! {
@@ -191,7 +218,7 @@ mod tests {
 		type Call = ();
 		type Hash = H256;
 		type Hashing = ::sr_primitives::traits::BlakeTwo256;
-		type AccountId = im_online::AuthorityId;
+		type AccountId = AuthorityId;
 		type Lookup = IdentityLookup<Self::AccountId>;
 		type Header = Header;
 		type WeightMultiplierUpdate = ();
@@ -208,17 +235,17 @@ mod tests {
 	}
 
 	pub struct TestSessionHandler;
-	impl session::SessionHandler<im_online::AuthorityId> for TestSessionHandler {
+	impl session::SessionHandler<AuthorityId> for TestSessionHandler {
 		fn on_new_session<Ks: OpaqueKeys>(
 			_changed: bool,
-			_validators: &[(im_online::AuthorityId, Ks)],
+			_validators: &[(AuthorityId, Ks)],
-			_queued_validators: &[(im_online::AuthorityId, Ks)],
+			_queued_validators: &[(AuthorityId, Ks)],
 		) {
 		}
 
 		fn on_disabled(_validator_index: usize) {}
 
-		fn on_genesis_session<Ks: OpaqueKeys>(_validators: &[(im_online::AuthorityId, Ks)]) {}
+		fn on_genesis_session<Ks: OpaqueKeys>(_validators: &[(AuthorityId, Ks)]) {}
 	}
 
 	#[test]
@@ -236,17 +263,17 @@ mod tests {
 			.sr25519_public_keys(key_types::IM_ONLINE)
 			.pop()
 			.unwrap();
-		let authority_id = im_online::AuthorityId::from(public_key);
+		let authority_id = AuthorityId::from(public_key);
 
 		// Build genesis.
 		let mut t = system::GenesisConfig::default()
 			.build_storage::<Test>()
 			.unwrap();
 
-		GenesisConfig {
+		GenesisConfig::<Test> {
 			keys: vec![authority_id.clone()],
 		}
-		.assimilate_storage::<Test>(&mut t)
+		.assimilate_storage(&mut t)
 		.unwrap();
 
 		// Create externalities.
@@ -279,11 +306,11 @@ mod tests {
 		let keys = vec![(); 5]
 			.iter()
 			.map(|_x| sr25519::Pair::generate_with_phrase(None).0.public())
-			.map(im_online::AuthorityId::from)
+			.map(AuthorityId::from)
 			.collect();
 
-		GenesisConfig { keys: keys }
+		GenesisConfig::<Test> { keys: keys }
-			.assimilate_storage::<Test>(&mut t)
+			.assimilate_storage(&mut t)
 			.unwrap();
 
 		// Create externalities.
@@ -310,17 +337,17 @@ mod tests {
 			.sr25519_public_keys(key_types::IM_ONLINE)
 			.pop()
 			.unwrap();
-		let authority_id = im_online::AuthorityId::from(public_key);
+		let authority_id = AuthorityId::from(public_key);
 
 		// Build genesis.
 		let mut t = system::GenesisConfig::default()
 			.build_storage::<Test>()
 			.unwrap();
 
-		GenesisConfig {
+		GenesisConfig::<Test> {
 			keys: vec![authority_id.clone()],
 		}
-		.assimilate_storage::<Test>(&mut t)
+		.assimilate_storage(&mut t)
 		.unwrap();
 
 		// Create externalities.

substrate/srml/im-online/src/lib.rs

@@ -67,7 +67,7 @@
 // Ensure we're `no_std` when compiling for Wasm.
 #![cfg_attr(not(feature = "std"), no_std)]
 
-use app_crypto::RuntimeAppPublic;
+use app_crypto::{AppPublic, RuntimeAppPublic};
 use codec::{Encode, Decode};
 use primitives::offchain::{OpaqueNetworkState, StorageKind};
 use rstd::prelude::*;
@@ -75,7 +75,7 @@ use session::historical::IdentificationTuple;
 use sr_io::Printable;
 use sr_primitives::{
 	Perbill, ApplyError,
-	traits::{Extrinsic as ExtrinsicT, Convert},
+	traits::{Convert, Extrinsic as ExtrinsicT, Member},
 	transaction_validity::{TransactionValidity, TransactionLongevity, ValidTransaction},
 };
 use sr_staking_primitives::{
@@ -83,28 +83,44 @@ use sr_staking_primitives::{
 	offence::{ReportOffence, Offence, Kind},
 };
 use srml_support::{
-	StorageValue, decl_module, decl_event, decl_storage, StorageDoubleMap, print, ensure
+	decl_module, decl_event, decl_storage, print, ensure,
+	Parameter, StorageValue, StorageDoubleMap,
 };
 use system::ensure_none;
 
-mod app {
+pub mod sr25519 {
-	pub use app_crypto::sr25519 as crypto;
+	mod app_sr25519 {
-	use app_crypto::{app_crypto, key_types::IM_ONLINE, sr25519};
+		use app_crypto::{app_crypto, key_types::IM_ONLINE, sr25519};
+		app_crypto!(sr25519, IM_ONLINE);
+	}
 
-	app_crypto!(sr25519, IM_ONLINE);
+	/// An i'm online keypair using sr25519 as its crypto.
+	#[cfg(feature = "std")]
+	pub type AuthorityPair = app_sr25519::Pair;
+
+	/// An i'm online signature using sr25519 as its crypto.
+	pub type AuthoritySignature = app_sr25519::Signature;
+
+	/// An i'm online identifier using sr25519 as its crypto.
+	pub type AuthorityId = app_sr25519::Public;
 }
 
-/// A Babe authority keypair. Necessarily equivalent to the schnorrkel public key used in
+pub mod ed25519 {
-/// the main Babe module. If that ever changes, then this must, too.
+	mod app_ed25519 {
-#[cfg(feature = "std")]
+		use app_crypto::{app_crypto, key_types::IM_ONLINE, ed25519};
-pub type AuthorityPair = app::Pair;
+		app_crypto!(ed25519, IM_ONLINE);
+	}
 
-/// A Babe authority signature.
+	/// An i'm online keypair using ed25519 as its crypto.
-pub type AuthoritySignature = app::Signature;
+	#[cfg(feature = "std")]
+	pub type AuthorityPair = app_ed25519::Pair;
 
-/// A Babe authority identifier. Necessarily equivalent to the schnorrkel public key used in
+	/// An i'm online signature using ed25519 as its crypto.
-/// the main Babe module. If that ever changes, then this must, too.
+	pub type AuthoritySignature = app_ed25519::Signature;
-pub type AuthorityId = app::Public;
+
+	/// An i'm online identifier using ed25519 as its crypto.
+	pub type AuthorityId = app_ed25519::Public;
+}
 
 // The local storage database key under which the worker progress status
 // is tracked.
@@ -158,10 +174,13 @@ pub struct Heartbeat<BlockNumber>
 }
 
 pub trait Trait: system::Trait + session::historical::Trait {
-	/// The overarching event type.
+	/// The identifier type for an authority.
-	type Event: From<Event> + Into<<Self as system::Trait>::Event>;
+	type AuthorityId: Member + Parameter + AppPublic + RuntimeAppPublic + Default;
 
-	/// The function call.
+	/// The overarching event type.
+	type Event: From<Event<Self>> + Into<<Self as system::Trait>::Event>;
+
+	/// A dispatchable call type.
 	type Call: From<Call<Self>>;
 
 	/// A extrinsic right from the external world. This is unchecked and so
@@ -181,7 +200,9 @@ pub trait Trait: system::Trait + session::historical::Trait {
 }
 
 decl_event!(
-	pub enum Event {
+	pub enum Event<T> where
+		<T as Trait>::AuthorityId,
+	{
 		/// A new heartbeat was received from `AuthorityId`
 		HeartbeatReceived(AuthorityId),
 	}
@@ -193,7 +214,7 @@ decl_storage! {
 		GossipAt get(gossip_at): T::BlockNumber;
 
 		/// The current set of keys that may issue a heartbeat.
-		Keys get(keys): Vec<AuthorityId>;
+		Keys get(keys): Vec<T::AuthorityId>;
 
 		/// For each session index we keep a mapping of `AuthorityId`
 		/// to `offchain::OpaqueNetworkState`.
@@ -201,10 +222,10 @@ decl_storage! {
 			blake2_256(AuthIndex) => Vec<u8>;
 	}
 	add_extra_genesis {
-		config(keys): Vec<AuthorityId>;
+		config(keys): Vec<T::AuthorityId>;
 		build(|
 			storage: &mut (sr_primitives::StorageOverlay, sr_primitives::ChildrenStorageOverlay),
-			config: &GenesisConfig
+			config: &GenesisConfig<T>
 		| {
 			sr_io::with_storage(
 				storage,
@@ -217,12 +238,12 @@ decl_storage! {
 
 decl_module! {
 	pub struct Module<T: Trait> for enum Call where origin: T::Origin {
-		fn deposit_event() = default;
+		fn deposit_event<T>() = default;
 
 		fn heartbeat(
 			origin,
 			heartbeat: Heartbeat<T::BlockNumber>,
-			signature: AuthoritySignature
+			signature: <T::AuthorityId as RuntimeAppPublic>::Signature
 		) {
 			ensure_none(origin)?;
 
@@ -232,7 +253,7 @@ decl_module! {
 				&current_session,
 				&heartbeat.authority_index
 			);
-			let keys = Keys::get();
+			let keys = Keys::<T>::get();
 			let public = keys.get(heartbeat.authority_index as usize);
 			if let (true, Some(public)) = (!exists, public) {
 				let signature_valid = heartbeat.using_encoded(|encoded_heartbeat| {
@@ -240,7 +261,7 @@ decl_module! {
 				});
 				ensure!(signature_valid, "Invalid heartbeat signature.");
 
-				Self::deposit_event(Event::HeartbeatReceived(public.clone()));
+				Self::deposit_event(Event::<T>::HeartbeatReceived(public.clone()));
 
 				let network_state = heartbeat.network_state.encode();
 				<ReceivedHeartbeats>::insert(
@@ -297,8 +318,8 @@ impl<T: Trait> Module<T> {
 
 	fn do_gossip_at(block_number: T::BlockNumber) -> Result<(), OffchainErr> {
 		// we run only when a local authority key is configured
-		let authorities = Keys::get();
+		let authorities = Keys::<T>::get();
-		let mut local_keys = app::Public::all();
+		let mut local_keys = T::AuthorityId::all();
 		local_keys.sort();
 
 		for (authority_index, key) in authorities.into_iter()
@@ -389,27 +410,27 @@ impl<T: Trait> Module<T> {
 		}
 	}
 
-	fn initialize_keys(keys: &[AuthorityId]) {
+	fn initialize_keys(keys: &[T::AuthorityId]) {
 		if !keys.is_empty() {
-			assert!(Keys::get().is_empty(), "Keys are already initialized!");
+			assert!(Keys::<T>::get().is_empty(), "Keys are already initialized!");
-			Keys::put_ref(keys);
+			Keys::<T>::put_ref(keys);
 		}
 	}
 }
 
 impl<T: Trait> session::OneSessionHandler<T::AccountId> for Module<T> {
 
-	type Key = AuthorityId;
+	type Key = T::AuthorityId;
 
 	fn on_genesis_session<'a, I: 'a>(validators: I)
-		where I: Iterator<Item=(&'a T::AccountId, AuthorityId)>
+		where I: Iterator<Item=(&'a T::AccountId, T::AuthorityId)>
 	{
 		let keys = validators.map(|x| x.1).collect::<Vec<_>>();
 		Self::initialize_keys(&keys);
 	}
 
 	fn on_new_session<'a, I: 'a>(_changed: bool, validators: I, _queued_validators: I)
-		where I: Iterator<Item=(&'a T::AccountId, AuthorityId)>
+		where I: Iterator<Item=(&'a T::AccountId, T::AuthorityId)>
 	{
 		// Reset heartbeats
 		<ReceivedHeartbeats>::remove_prefix(&<session::Module<T>>::current_index());
@@ -418,7 +439,7 @@ impl<T: Trait> session::OneSessionHandler<T::AccountId> for Module<T> {
 		<GossipAt<T>>::put(<system::Module<T>>::block_number());
 
 		// Remember who the authorities are for the new session.
-		Keys::put(validators.map(|x| x.1).collect::<Vec<_>>());
+		Keys::<T>::put(validators.map(|x| x.1).collect::<Vec<_>>());
 	}
 
 	fn on_before_session_ending() {
@@ -426,7 +447,7 @@ impl<T: Trait> session::OneSessionHandler<T::AccountId> for Module<T> {
 
 		let current_session = <session::Module<T>>::current_index();
 
-		let keys = Keys::get();
+		let keys = Keys::<T>::get();
 		let current_elected = T::CurrentElectedSet::current_elected_set();
 
 		// The invariant is that these two are of the same length.
@@ -481,7 +502,7 @@ impl<T: Trait> srml_support::unsigned::ValidateUnsigned for Module<T> {
 			}
 
 			// verify that the incoming (unverified) pubkey is actually an authority id
-			let keys = Keys::get();
+			let keys = Keys::<T>::get();
 			let authority_id = match keys.get(heartbeat.authority_index as usize) {
 				Some(id) => id,
 				None => return TransactionValidity::Invalid(ApplyError::BadSignature as i8),