Add bindings to the events from the coins module to serai-client-serai

Promotes clarity.

coordinator/cosign/Cargo.toml

@@ -22,6 +22,7 @@ blake2 = { version = "0.11.0-rc.0", default-features = false, features = ["alloc
 
 borsh = { version = "1", default-features = false, features = ["std", "derive", "de_strict_order"] }
 serai-abi = { path = "../../substrate/abi", default-features = false, features = ["std"] }
+serai-client-serai = { path = "../../substrate/client/serai", default-features = false }
 
 log = { version = "0.4", default-features = false, features = ["std"] }
 

coordinator/cosign/src/intend.rs

@@ -1,10 +1,13 @@
 use core::future::Future;
 use std::{sync::Arc, collections::HashMap};
 
+use blake2::{Digest, Blake2b256};
+
 use serai_abi::primitives::{
   balance::Amount, validator_sets::ExternalValidatorSet, address::SeraiAddress,
+  merkle::IncrementalUnbalancedMerkleTree,
 };
-use serai_client::Serai;
+use serai_client_serai::Serai;
 
 use serai_db::*;
 use serai_task::ContinuallyRan;
@@ -14,6 +17,7 @@ use crate::*;
 create_db!(
   CosignIntend {
     ScanCosignFrom: () -> u64,
+    BuildsUpon: () -> IncrementalUnbalancedMerkleTree,
   }
 );
 
@@ -40,9 +44,9 @@ async fn block_has_events_justifying_a_cosign(
     .await
     .map_err(|e| format!("{e:?}"))?
     .ok_or_else(|| "couldn't get block which should've been finalized".to_string())?;
-  let serai = serai.as_of(block.hash());
+  let serai = serai.as_of(block.header.hash()).await.map_err(|e| format!("{e:?}"))?;
 
-  if !serai.validator_sets().key_gen_events().await.map_err(|e| format!("{e:?}"))?.is_empty() {
+  if !serai.validator_sets().set_keys_events().await.map_err(|e| format!("{e:?}"))?.is_empty() {
     return Ok((block, HasEvents::Notable));
   }
 
@@ -66,7 +70,7 @@ impl<D: Db> ContinuallyRan for CosignIntendTask<D> {
     async move {
       let start_block_number = ScanCosignFrom::get(&self.db).unwrap_or(1);
       let latest_block_number =
-        self.serai.latest_finalized_block_number().await.map_err(|e| format!("{e:?}"))?.number();
+        self.serai.latest_finalized_block_number().await.map_err(|e| format!("{e:?}"))?;
 
       for block_number in start_block_number ..= latest_block_number {
         let mut txn = self.db.txn();
@@ -76,26 +80,35 @@ impl<D: Db> ContinuallyRan for CosignIntendTask<D> {
             .await
             .map_err(|e| format!("{e:?}"))?;
 
+        let mut builds_upon =
+          BuildsUpon::get(&txn).unwrap_or(IncrementalUnbalancedMerkleTree::new());
+
         // Check we are indexing a linear chain
-        if (block_number > 1) &&
-          (<[u8; 32]>::from(block.header.parent_hash) !=
-            SubstrateBlockHash::get(&txn, block_number - 1)
-              .expect("indexing a block but haven't indexed its parent"))
+        if block.header.builds_upon() !=
+          builds_upon.clone().calculate(serai_abi::BLOCK_HEADER_BRANCH_TAG)
         {
           Err(format!(
             "node's block #{block_number} doesn't build upon the block #{} prior indexed",
             block_number - 1
           ))?;
         }
-        let block_hash = block.hash();
+        let block_hash = block.header.hash();
         SubstrateBlockHash::set(&mut txn, block_number, &block_hash);
+        builds_upon.append(
+          serai_abi::BLOCK_HEADER_BRANCH_TAG,
+          Blake2b256::new_with_prefix([serai_abi::BLOCK_HEADER_LEAF_TAG])
+            .chain_update(block_hash.0)
+            .finalize()
+            .into(),
+        );
+        BuildsUpon::set(&mut txn, &builds_upon);
 
         let global_session_for_this_block = LatestGlobalSessionIntended::get(&txn);
 
         // If this is notable, it creates a new global session, which we index into the database
         // now
         if has_events == HasEvents::Notable {
-          let serai = self.serai.as_of(block_hash);
+          let serai = self.serai.as_of(block_hash).await.map_err(|e| format!("{e:?}"))?;
           let sets_and_keys = cosigning_sets(&serai).await?;
           let global_session =
             GlobalSession::id(sets_and_keys.iter().map(|(set, _key)| *set).collect());
@@ -109,7 +122,7 @@ impl<D: Db> ContinuallyRan for CosignIntendTask<D> {
             keys.insert(set.network, SeraiAddress::from(*key));
             let stake = serai
               .validator_sets()
-              .total_allocated_stake(set.network.into())
+              .current_stake(set.network.into())
               .await
               .map_err(|e| format!("{e:?}"))?
               .unwrap_or(Amount(0))

coordinator/cosign/src/lib.rs

@@ -11,6 +11,7 @@ use borsh::{BorshSerialize, BorshDeserialize};
 
 use serai_abi::{
   primitives::{
+    BlockHash,
     crypto::{Public, KeyPair},
     network_id::ExternalNetworkId,
     validator_sets::{Session, ExternalValidatorSet},
@@ -18,7 +19,7 @@ use serai_abi::{
   },
   Block,
 };
-use serai_client::{Serai, TemporalSerai};
+use serai_client_serai::{Serai, TemporalSerai};
 
 use serai_db::*;
 use serai_task::*;
@@ -86,7 +87,7 @@ create_db! {
     // The following are populated by the intend task and used throughout the library
 
     // An index of Substrate blocks
-    SubstrateBlockHash: (block_number: u64) -> [u8; 32],
+    SubstrateBlockHash: (block_number: u64) -> BlockHash,
     // A mapping from a global session's ID to its relevant information.
     GlobalSessions: (global_session: [u8; 32]) -> GlobalSession,
     // The last block to be cosigned by a global session.
@@ -124,7 +125,7 @@ async fn keys_for_network(
   network: ExternalNetworkId,
 ) -> Result<Option<(Session, KeyPair)>, String> {
   let Some(latest_session) =
-    serai.validator_sets().session(network.into()).await.map_err(|e| format!("{e:?}"))?
+    serai.validator_sets().current_session(network.into()).await.map_err(|e| format!("{e:?}"))?
   else {
     // If this network hasn't had a session declared, move on
     return Ok(None);
@@ -272,7 +273,10 @@ impl<D: Db> Cosigning<D> {
   }
 
   /// Fetch a cosigned Substrate block's hash by its block number.
-  pub fn cosigned_block(getter: &impl Get, block_number: u64) -> Result<Option<[u8; 32]>, Faulted> {
+  pub fn cosigned_block(
+    getter: &impl Get,
+    block_number: u64,
+  ) -> Result<Option<BlockHash>, Faulted> {
     if block_number > Self::latest_cosigned_block_number(getter)? {
       return Ok(None);
     }

coordinator/cosign/types/src/lib.rs

@@ -3,7 +3,7 @@
 //! Types used when cosigning Serai. For more info, please see `serai-cosign`.
 use borsh::{BorshSerialize, BorshDeserialize};
 
-use serai_primitives::{crypto::Public, network_id::ExternalNetworkId};
+use serai_primitives::{BlockHash, crypto::Public, network_id::ExternalNetworkId};
 
 /// The schnorrkel context to used when signing a cosign.
 pub const COSIGN_CONTEXT: &[u8] = b"/serai/coordinator/cosign";
@@ -16,7 +16,7 @@ pub struct CosignIntent {
   /// The number of the block to cosign.
   pub block_number: u64,
   /// The hash of the block to cosign.
-  pub block_hash: [u8; 32],
+  pub block_hash: BlockHash,
   /// If this cosign must be handled before further cosigns are.
   pub notable: bool,
 }
@@ -29,7 +29,7 @@ pub struct Cosign {
   /// The number of the block to cosign.
   pub block_number: u64,
   /// The hash of the block to cosign.
-  pub block_hash: [u8; 32],
+  pub block_hash: BlockHash,
   /// The actual cosigner.
   pub cosigner: ExternalNetworkId,
 }

substrate/abi/src/validator_sets.rs

@@ -1,3 +1,5 @@
+use alloc::vec::Vec;
+
 use borsh::{BorshSerialize, BorshDeserialize};
 
 use serai_primitives::{
@@ -96,6 +98,8 @@ pub enum Event {
   SetDecided {
     /// The set decided.
     set: ValidatorSet,
+    /// The validators decided to be included in the set.
+    validators: Vec<(SeraiAddress, KeyShares)>,
   },
   /// A validator set has set their keys.
   SetKeys {

substrate/client/serai/Cargo.toml

@@ -30,6 +30,7 @@ async-lock = "3"
 
 [dev-dependencies]
 blake2 = { version = "0.11.0-rc.3", default-features = false }
+sp-core = { git = "https://github.com/serai-dex/patch-polkadot-sdk", rev = "e01101b68c5b0f588dd4cdee48f801a2c1f75b84" }
 
 tokio = { version = "1", default-features = false, features = ["rt", "macros"] }
 dockertest = "0.5"

substrate/client/serai/src/coins.rs

@@ -0,0 +1,76 @@
+pub use serai_abi::coins::Event;
+
+use crate::{RpcError, TemporalSerai};
+
+/// A `TemporalSerai` scoped to the coins module.
+#[derive(Clone)]
+pub struct Coins<'a>(pub(super) &'a TemporalSerai<'a>);
+
+impl<'a> Coins<'a> {
+  /// The events from the coins module.
+  pub async fn events(&self) -> Result<Vec<Event>, RpcError> {
+    Ok(
+      self
+        .0
+        .events_borrowed()
+        .await?
+        .as_ref()
+        .expect("`TemporalSerai::events` returned None")
+        .iter()
+        .flat_map(IntoIterator::into_iter)
+        .filter_map(|event| match event {
+          serai_abi::Event::Coins(event) => Some(event.clone()),
+          _ => None,
+        })
+        .collect(),
+    )
+  }
+
+  /// The `Mint` events from the coins module.
+  pub async fn mint_events(&self) -> Result<Vec<Event>, RpcError> {
+    Ok(
+      self
+        .events()
+        .await?
+        .into_iter()
+        .filter(|event| matches!(event, Event::Mint { .. }))
+        .collect(),
+    )
+  }
+
+  /// The `Transfer` events from the coins module.
+  pub async fn transfer_events(&self) -> Result<Vec<Event>, RpcError> {
+    Ok(
+      self
+        .events()
+        .await?
+        .into_iter()
+        .filter(|event| matches!(event, Event::Transfer { .. }))
+        .collect(),
+    )
+  }
+
+  /// The `Burn` events from the coins module.
+  pub async fn burn_events(&self) -> Result<Vec<Event>, RpcError> {
+    Ok(
+      self
+        .events()
+        .await?
+        .into_iter()
+        .filter(|event| matches!(event, Event::Burn { .. }))
+        .collect(),
+    )
+  }
+
+  /// The `BurnWithInstruction` events from the coins module.
+  pub async fn burn_with_instruction_events(&self) -> Result<Vec<Event>, RpcError> {
+    Ok(
+      self
+        .events()
+        .await?
+        .into_iter()
+        .filter(|event| matches!(event, Event::BurnWithInstruction { .. }))
+        .collect(),
+    )
+  }
+}

substrate/client/serai/src/lib.rs

@@ -19,6 +19,10 @@ use abi::{
 
 use async_lock::RwLock;
 
+/// RPC client functionality for the coins module.
+pub mod coins;
+use coins::*;
+
 /// RPC client functionality for the validator sets module.
 pub mod validator_sets;
 use validator_sets::*;
@@ -134,25 +138,29 @@ impl Serai {
   }
 
   async fn block_internal(
-    block: impl Future<Output = Result<String, RpcError>>,
-  ) -> Result<Block, RpcError> {
+    block: impl Future<Output = Result<Option<String>, RpcError>>,
+  ) -> Result<Option<Block>, RpcError> {
     let bin = block.await?;
-    Block::deserialize(
-      &mut hex::decode(&bin)
-        .map_err(|_| RpcError::InvalidNode("node returned non-hex-encoded block".to_string()))?
-        .as_slice(),
-    )
-    .map_err(|_| RpcError::InvalidNode("node returned invalid block".to_string()))
+    bin
+      .map(|bin| {
+        Block::deserialize(
+          &mut hex::decode(&bin)
+            .map_err(|_| RpcError::InvalidNode("node returned non-hex-encoded block".to_string()))?
+            .as_slice(),
+        )
+        .map_err(|_| RpcError::InvalidNode("node returned invalid block".to_string()))
+      })
+      .transpose()
   }
 
   /// Fetch a block from the Serai blockchain.
-  pub async fn block(&self, block: BlockHash) -> Result<Block, RpcError> {
+  pub async fn block(&self, block: BlockHash) -> Result<Option<Block>, RpcError> {
     Self::block_internal(self.call("blockchain/block", &format!(r#"{{ "block": "{block}" }}"#)))
       .await
   }
 
   /// Fetch a block from the Serai blockchain by its number.
-  pub async fn block_by_number(&self, block: u64) -> Result<Block, RpcError> {
+  pub async fn block_by_number(&self, block: u64) -> Result<Option<Block>, RpcError> {
     Self::block_internal(self.call("blockchain/block", &format!(r#"{{ "block": {block} }}"#))).await
   }
 
@@ -241,6 +249,11 @@ impl<'a> TemporalSerai<'a> {
     Ok(self.events_borrowed().await?.clone().expect("`TemporalSerai::events` returned None"))
   }
 
+  /// Scope to the coins module.
+  pub fn coins(&self) -> Coins<'_> {
+    Coins(self)
+  }
+
   /// Scope to the validator sets module.
   pub fn validator_sets(&self) -> ValidatorSets<'_> {
     ValidatorSets(self)

substrate/client/serai/tests/blockchain.rs

@@ -49,8 +49,8 @@ async fn blockchain() {
       let test_finalized_block = |number| {
         let serai = &serai;
         async move {
-          let block = serai.block_by_number(number).await.unwrap();
-          assert_eq!(serai.block(block.header.hash()).await.unwrap(), block);
+          let block = serai.block_by_number(number).await.unwrap().unwrap();
+          assert_eq!(serai.block(block.header.hash()).await.unwrap().unwrap(), block);
           assert!(serai.finalized(block.header.hash()).await.unwrap());
         }
       };
@@ -70,7 +70,7 @@ async fn blockchain() {
             continue;
           };
           // Check if it's considered finalized
-          let considered_finalized = serai.finalized(block.header.hash()).await.unwrap();
+          let considered_finalized = serai.finalized(block.unwrap().header.hash()).await.unwrap();
           // Ensure the finalized block is the same, meaning this block didn't become finalized as
           // we made these RPC requests
           if latest_finalized != serai.latest_finalized_block_number().await.unwrap() {
@@ -108,7 +108,7 @@ async fn blockchain() {
         let mut observed_consensus_commitments = HashSet::new();
         let mut tagged_block_hashes = vec![];
         for i in 0 ..= last_block_number {
-          let block = serai.block_by_number(i).await.unwrap();
+          let block = serai.block_by_number(i).await.unwrap().unwrap();
 
           assert_eq!(block.header.number(), i);
 

substrate/client/serai/tests/validator_sets.rs

@@ -1,8 +1,9 @@
 use serai_abi::{
   primitives::{
+    address::SeraiAddress,
     network_id::{ExternalNetworkId, NetworkId},
     balance::Amount,
-    validator_sets::{Session, ExternalValidatorSet, ValidatorSet},
+    validator_sets::{Session, ExternalValidatorSet, ValidatorSet, KeyShares},
   },
   validator_sets::Event,
 };
@@ -43,11 +44,16 @@ async fn validator_sets() {
         panic!("finalized block remained the genesis block for over five minutes");
       };
 
-      // The genesis block should have the expected events
       {
+        use sp_core::{Pair as _, sr25519::Pair};
+        let genesis_validators = vec![(
+          SeraiAddress::from(Pair::from_string("//Alice", None).unwrap().public()),
+          KeyShares(1),
+        )];
+        // The genesis block should have the expected events
         {
           let mut events = serai
-            .as_of(serai.block_by_number(0).await.unwrap().header.hash())
+            .as_of(serai.block_by_number(0).await.unwrap().unwrap().header.hash())
             .await
             .unwrap()
             .validator_sets()
@@ -58,27 +64,32 @@ async fn validator_sets() {
           let mut expected = vec![
             Event::SetDecided {
               set: ValidatorSet { network: NetworkId::Serai, session: Session(0) },
+              validators: genesis_validators.clone(),
             },
             Event::SetDecided {
               set: ValidatorSet { network: NetworkId::Serai, session: Session(1) },
+              validators: genesis_validators.clone(),
             },
             Event::SetDecided {
               set: ValidatorSet {
                 network: NetworkId::External(ExternalNetworkId::Bitcoin),
                 session: Session(0),
               },
+              validators: genesis_validators.clone(),
             },
             Event::SetDecided {
               set: ValidatorSet {
                 network: NetworkId::External(ExternalNetworkId::Ethereum),
                 session: Session(0),
               },
+              validators: genesis_validators.clone(),
             },
             Event::SetDecided {
               set: ValidatorSet {
                 network: NetworkId::External(ExternalNetworkId::Monero),
                 session: Session(0),
               },
+              validators: genesis_validators.clone(),
             },
           ];
           expected.sort_by_key(|event| borsh::to_vec(event).unwrap());
@@ -87,7 +98,7 @@ async fn validator_sets() {
 
         assert_eq!(
           serai
-            .as_of(serai.block_by_number(0).await.unwrap().header.hash())
+            .as_of(serai.block_by_number(0).await.unwrap().unwrap().header.hash())
             .await
             .unwrap()
             .validator_sets()
@@ -104,7 +115,7 @@ async fn validator_sets() {
       {
         assert_eq!(
           serai
-            .as_of(serai.block_by_number(1).await.unwrap().header.hash())
+            .as_of(serai.block_by_number(1).await.unwrap().unwrap().header.hash())
             .await
             .unwrap()
             .validator_sets()
@@ -115,7 +126,7 @@ async fn validator_sets() {
         );
         assert_eq!(
           serai
-            .as_of(serai.block_by_number(1).await.unwrap().header.hash())
+            .as_of(serai.block_by_number(1).await.unwrap().unwrap().header.hash())
             .await
             .unwrap()
             .validator_sets()
@@ -127,8 +138,10 @@ async fn validator_sets() {
       }
 
       {
-        let serai =
-          serai.as_of(serai.block_by_number(0).await.unwrap().header.hash()).await.unwrap();
+        let serai = serai
+          .as_of(serai.block_by_number(0).await.unwrap().unwrap().header.hash())
+          .await
+          .unwrap();
         let serai = serai.validator_sets();
         for network in NetworkId::all() {
           match network {

substrate/node/src/rpc/blockchain.rs

@@ -37,10 +37,12 @@ pub(crate) fn module<
   module.register_method(
     "blockchain/is_finalized",
     |params, client, _ext| -> Result<_, Error> {
-      let block_hash = block_hash(&**client, &params)?;
+      let Some(block_hash) = block_hash(&**client, &params)? else {
+        return Ok(false);
+      };
       let finalized = client.info().finalized_number;
       let Ok(Some(number)) = client.number(block_hash) else {
-        Err(Error::Missing("failed to fetch block's number"))?
+        return Ok(false);
       };
       let Ok(status) = client.block_status(block_hash) else {
         Err(Error::Internal("failed to fetch block's status"))?
@@ -53,18 +55,22 @@ pub(crate) fn module<
   )?;
 
   module.register_method("blockchain/block", |params, client, _ext| -> Result<_, Error> {
-    let block_hash = block_hash(&**client, &params)?;
+    let Some(block_hash) = block_hash(&**client, &params)? else {
+      return Ok(None);
+    };
     let Ok(Some(block)) = client.block(block_hash) else {
-      Err(Error::Missing("couldn't find requested block"))?
+      return Ok(None);
     };
 
-    Ok(hex::encode(borsh::to_vec(&serai_abi::Block::from(block.block)).unwrap()))
+    Ok(Some(hex::encode(borsh::to_vec(&serai_abi::Block::from(block.block)).unwrap())))
   })?;
 
   module.register_method("blockchain/events", |params, client, _ext| -> Result<_, Error> {
-    let block_hash = block_hash(&**client, &params)?;
+    let Some(block_hash) = block_hash(&**client, &params)? else {
+      Err(Error::InvalidStateReference)?
+    };
     let Ok(events) = client.runtime_api().events(block_hash) else {
-      Err(Error::Missing("couldn't fetch the events for the requested block"))?
+      Err(Error::InvalidStateReference)?
     };
     Ok(
       events

substrate/node/src/rpc/utils.rs

@@ -6,7 +6,7 @@ use serai_abi::{primitives::prelude::*, SubstrateBlock as Block};
 pub(super) enum Error {
   Internal(&'static str),
   InvalidRequest(&'static str),
-  Missing(&'static str),
+  InvalidStateReference,
 }
 
 impl From<Error> for jsonrpsee::types::error::ErrorObjectOwned {
@@ -18,9 +18,11 @@ impl From<Error> for jsonrpsee::types::error::ErrorObjectOwned {
       Error::InvalidRequest(str) => {
         jsonrpsee::types::error::ErrorObjectOwned::owned(-2, str, Option::<()>::None)
       }
-      Error::Missing(str) => {
-        jsonrpsee::types::error::ErrorObjectOwned::owned(-3, str, Option::<()>::None)
-      }
+      Error::InvalidStateReference => jsonrpsee::types::error::ErrorObjectOwned::owned(
+        -4,
+        "the block used as the reference was not locally held",
+        Option::<()>::None,
+      ),
     }
   }
 }
@@ -30,7 +32,7 @@ pub(super) fn block_hash<
 >(
   client: &C,
   params: &jsonrpsee::types::params::Params,
-) -> Result<<Block as sp_runtime::traits::Block>::Hash, Error> {
+) -> Result<Option<<Block as sp_runtime::traits::Block>::Hash>, Error> {
   #[derive(sp_core::serde::Deserialize)]
   #[serde(crate = "sp_core::serde")]
   struct BlockByHash {
@@ -50,13 +52,13 @@ pub(super) fn block_hash<
     }) else {
       return Err(Error::InvalidRequest("requested block hash wasn't a valid hash"));
     };
-    block_hash
+    Some(block_hash)
   } else {
     let Ok(block_number) = params.parse::<BlockByNumber>() else {
       return Err(Error::InvalidRequest("requested block wasn't a valid hash nor number"));
     };
-    let Ok(Some(block_hash)) = client.block_hash(block_number.block) else {
-      return Err(Error::Missing("no block hash for that block number"));
+    let Ok(block_hash) = client.block_hash(block_number.block) else {
+      return Err(Error::Internal("couldn't fetch block hash for block number"));
     };
     block_hash
   })

substrate/node/src/rpc/validator_sets.rs

@@ -72,7 +72,9 @@ pub(crate) fn module<
   module.register_method(
     "validator-sets/current_session",
     |params, client, _ext| -> Result<_, Error> {
-      let block_hash = block_hash(&**client, &params)?;
+      let Some(block_hash) = block_hash(&**client, &params)? else {
+        Err(Error::InvalidStateReference)?
+      };
       let network = network(&params)?;
       let Ok(session) = client.runtime_api().current_session(block_hash, network) else {
         Err(Error::Internal("couldn't fetch the session for the requested network"))?
@@ -84,7 +86,9 @@ pub(crate) fn module<
   module.register_method(
     "validator-sets/current_stake",
     |params, client, _ext| -> Result<_, Error> {
-      let block_hash = block_hash(&**client, &params)?;
+      let Some(block_hash) = block_hash(&**client, &params)? else {
+        Err(Error::InvalidStateReference)?
+      };
       let network = network(&params)?;
       let Ok(stake) = client.runtime_api().current_stake(block_hash, network) else {
         Err(Error::Internal("couldn't fetch the total allocated stake for the requested network"))?
@@ -94,7 +98,9 @@ pub(crate) fn module<
   );
 
   module.register_method("validator-sets/keys", |params, client, _ext| -> Result<_, Error> {
-    let block_hash = block_hash(&**client, &params)?;
+    let Some(block_hash) = block_hash(&**client, &params)? else {
+      Err(Error::InvalidStateReference)?
+    };
     let set = set(&params)?;
     let Ok(set) = ExternalValidatorSet::try_from(set) else {
       Err(Error::InvalidRequest("requested keys for a non-external validator set"))?

substrate/primitives/src/address.rs

@@ -65,6 +65,17 @@ impl From<SeraiAddress> for Public {
   }
 }
 
+impl From<crate::crypto::Public> for SeraiAddress {
+  fn from(key: crate::crypto::Public) -> Self {
+    Public::from(key).into()
+  }
+}
+impl From<SeraiAddress> for crate::crypto::Public {
+  fn from(address: SeraiAddress) -> Self {
+    Public::from(address).into()
+  }
+}
+
 // We use Bech32m to encode addresses
 impl core::fmt::Display for SeraiAddress {
   fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {

substrate/primitives/src/merkle.rs

@@ -73,7 +73,7 @@ impl UnbalancedMerkleTree {
 }
 
 /// An unbalanced Merkle tree which is incrementally created.
-#[derive(Clone, PartialEq, Eq, Debug)]
+#[derive(Clone, PartialEq, Eq, Debug, BorshSerialize, BorshDeserialize)]
 #[cfg_attr(
   feature = "non_canonical_scale_derivations",
   derive(scale::Encode, scale::Decode, scale::DecodeWithMemTracking)

substrate/validator-sets/src/sessions.rs

@@ -326,14 +326,20 @@ impl<Storage: SessionsStorage> Sessions for Storage {
       latest_decided_set,
       KeySharesStruct::try_from(total_key_shares).expect("amortization failure"),
     );
-    for (key, key_shares) in selected_validators {
+    for (key, key_shares) in &selected_validators {
       Storage::SelectedValidators::insert(
-        selected_validators_key(latest_decided_set, key),
+        selected_validators_key(latest_decided_set, *key),
         key_shares,
       );
     }
 
-    Core::<Storage::Config>::emit_event(Event::SetDecided { set: latest_decided_set });
+    Core::<Storage::Config>::emit_event(Event::SetDecided {
+      set: latest_decided_set,
+      validators: selected_validators
+        .into_iter()
+        .map(|(key, key_shares)| (key.into(), key_shares))
+        .collect(),
+    });
 
     true
   }