Implement set_keys

This is needed for Ledgeracio.

src/frame/session.rs

@@ -22,6 +22,10 @@ use crate::frame::system::{
 };
 use codec::Encode;
 use frame_support::Parameter;
+use sp_runtime::traits::{
+    Member,
+    OpaqueKeys,
+};
 use std::{
     fmt::Debug,
     marker::PhantomData,
@@ -36,6 +40,9 @@ pub trait Session: System {
 
     /// The validator account identifier type for the runtime.
     type SessionIndex: Parameter + Debug + Ord + Default + Send + Sync + 'static;
+
+    /// The keys.
+    type Keys: OpaqueKeys + Member + Parameter + Default;
 }
 
 /// The current set of validators.
@@ -62,3 +69,12 @@ pub struct QueuedChangedStore<T: Session> {
     /// Marker for the runtime
     pub _runtime: PhantomData<T>,
 }
+
+/// The current set of validators.
+#[derive(Encode, Call)]
+pub struct SetKeysCall<T: Session> {
+    /// The keys
+    pub keys: T::Keys,
+    /// The proof. This is not currently used and can be set to an empty vector.
+    pub proof: Vec<u8>,
+}

src/lib.rs

@@ -21,7 +21,6 @@
     bad_style,
     const_err,
     improper_ctypes,
-    missing_docs,
     non_shorthand_field_patterns,
     no_mangle_generic_items,
     overflowing_literals,

src/runtimes.rs

@@ -13,9 +13,12 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with substrate-subxt.  If not, see <http://www.gnu.org/licenses/>.
+#![allow(missing_docs)]
 
+use pallet_im_online::sr25519::AuthorityId as ImOnlineId;
 use sp_runtime::{
     generic::Header,
+    impl_opaque_keys,
     traits::{
         BlakeTwo256,
         IdentifyAccount,
@@ -24,6 +27,47 @@ use sp_runtime::{
     MultiSignature,
     OpaqueExtrinsic,
 };
+use sp_std::prelude::*;
+
+/// BABE marker struct
+pub struct Babe;
+impl sp_runtime::BoundToRuntimeAppPublic for Babe {
+    type Public = sp_consensus_babe::AuthorityId;
+}
+
+/// ImOnline marker struct
+pub struct ImOnline;
+impl sp_runtime::BoundToRuntimeAppPublic for ImOnline {
+    type Public = ImOnlineId;
+}
+
+/// GRANDPA marker struct
+pub struct Grandpa;
+impl sp_runtime::BoundToRuntimeAppPublic for Grandpa {
+    type Public = sp_finality_grandpa::AuthorityId;
+}
+
+use sp_authority_discovery::AuthorityId as AuthorityDiscoveryId;
+
+/// Authority discovery marker struct
+pub struct AuthorityDiscovery;
+impl sp_runtime::BoundToRuntimeAppPublic for AuthorityDiscovery {
+    type Public = AuthorityDiscoveryId;
+}
+
+impl_opaque_keys! {
+    /// Runtime keys
+    pub struct SessionKeys {
+        //// GRANDPA session key
+        pub grandpa: Grandpa,
+        //// BABE session key
+        pub babe: Babe,
+        //// ImOnline session key
+        pub im_online: ImOnline,
+        //// AuthorityDiscovery session key
+        pub authority_discovery: AuthorityDiscovery,
+    }
+}
 
 use crate::frame::{
     balances::{
@@ -73,6 +117,7 @@ impl Balances for DefaultNodeRuntime {
 impl Session for DefaultNodeRuntime {
     type SessionIndex = u32;
     type ValidatorId = <Self as System>::AccountId;
+    type Keys = SessionKeys;
 }
 
 impl Contracts for DefaultNodeRuntime {}
@@ -101,6 +146,7 @@ impl System for KusamaRuntime {
 impl Session for KusamaRuntime {
     type SessionIndex = u32;
     type ValidatorId = <Self as System>::AccountId;
+    type Keys = SessionKeys;
 }
 
 impl Staking for KusamaRuntime {