grandpa: report equivocations on all runtimes (#1000)

* grandpa: report equivocations on all runtimes

* runtime: fix test-runtime compilation

* runtime: enable historical session manager on all runtimes

* runtime: fix indentation

* runtime: use strong key types in KeyOwnerProofSystem definitions

* update substrate

* bump spec_version of runtimes

polkadot/primitives/src/lib.rs

@@ -92,3 +92,32 @@ impl From<ValidityError> for u8 {
 		err as u8
 	}
 }
+
+/// App-specific crypto used for reporting equivocation/misbehavior in BABE,
+/// GRANDPA and Parachains, described in the white paper as the fisherman role.
+/// Any rewards for misbehavior reporting will be paid out to this account.
+pub mod fisherman {
+	use super::{Signature, Verify};
+	use primitives::crypto::KeyTypeId;
+
+	/// Key type for the reporting module. Used for reporting BABE, GRANDPA
+	/// and Parachain equivocations.
+	pub const KEY_TYPE: KeyTypeId = KeyTypeId(*b"fish");
+
+	mod app {
+		use application_crypto::{app_crypto, sr25519};
+		app_crypto!(sr25519, super::KEY_TYPE);
+	}
+
+	/// Identity of the equivocation/misbehavior reporter.
+	pub type FishermanId = app::Public;
+
+	/// An `AppCrypto` type to allow submitting signed transactions using the fisherman
+	/// application key as signer.
+	pub struct FishermanAppCrypto;
+	impl system::offchain::AppCrypto<<Signature as Verify>::Signer, Signature> for FishermanAppCrypto {
+		type RuntimeAppPublic = FishermanId;
+		type GenericSignature = primitives::sr25519::Signature;
+		type GenericPublic = primitives::sr25519::Public;
+	}
+}