add coordinator side rotation test

substrate/client/tests/validator_sets.rs

@@ -14,7 +14,9 @@ use serai_client::{
 mod common;
 use common::validator_sets::{set_keys, allocate_stake, deallocate_stake};
 
-const EPOCH_INTERVAL: u64 = 5;
+// TODO: get rid of this is constant and retrive the epoch numbers from sthe node directly
+// since epochs doesn't always change at the exact intervals.
+const EPOCH_INTERVAL: u64 = 300;
 
 serai_test!(
   set_keys_test: (|serai: Serai| async move {

substrate/runtime/src/lib.rs

@@ -315,7 +315,7 @@ pub type ReportLongevity = <Runtime as pallet_babe::Config>::EpochDuration;
 impl babe::Config for Runtime {
   #[cfg(feature = "fast-epoch")]
   #[allow(clippy::identity_op)]
-  type EpochDuration = ConstU64<{ DAYS / (24 * 60 * 2) }>; // 30 seconds
+  type EpochDuration = ConstU64<{ DAYS / (24 * 2) }>; // 30 minutes
 
   #[cfg(not(feature = "fast-epoch"))]
   #[allow(clippy::identity_op)]

substrate/validator-sets/pallet/src/lib.rs

@@ -652,7 +652,7 @@ pub mod pallet {
         // If not Serai, check the prior session had its keys cleared, which happens once its
         // retired
         return (network == NetworkId::Serai) ||
-          (!Keys::<T>::contains_key(ValidatorSet {
+          (Keys::<T>::contains_key(ValidatorSet {
             network,
             session: Session(current_session.0 - 1),
           }));

tests/coordinator/src/lib.rs

@@ -57,14 +57,22 @@ pub fn coordinator_instance(
   )
 }
 
-pub fn serai_composition(name: &str) -> TestBodySpecification {
+pub fn serai_composition(name: &str, fast_epoch: bool) -> TestBodySpecification {
+  if fast_epoch {
+    serai_docker_tests::build("serai-fast-epoch".to_string());
+    TestBodySpecification::with_image(
+      Image::with_repository("serai-dev-serai-fast-epoch").pull_policy(PullPolicy::Never),
+    )
+    .replace_env([("SERAI_NAME".to_string(), name.to_lowercase())].into())
+    .set_publish_all_ports(true)
+  } else {
     serai_docker_tests::build("serai".to_string());
-
     TestBodySpecification::with_image(
       Image::with_repository("serai-dev-serai").pull_policy(PullPolicy::Never),
     )
     .replace_env([("SERAI_NAME".to_string(), name.to_lowercase())].into())
     .set_publish_all_ports(true)
+  }
 }
 
 fn is_cosign_message(msg: &CoordinatorMessage) -> bool {
@@ -346,9 +354,9 @@ impl Processor {
 
   /// Receive a message from the coordinator as a processor.
   pub async fn recv_message(&mut self) -> CoordinatorMessage {
-    // Set a timeout of 20 minutes to allow effectively any protocol to occur without a fear of
+    // Set a timeout of 30 minutes to allow effectively any protocol to occur without a fear of
     // an arbitrary timeout cutting it short
-    tokio::time::timeout(Duration::from_secs(20 * 60), self.recv_message_inner()).await.unwrap()
+    tokio::time::timeout(Duration::from_secs(30 * 60), self.recv_message_inner()).await.unwrap()
   }
 
   pub async fn set_substrate_key(

tests/coordinator/src/tests/batch.rs

@@ -260,8 +260,14 @@ pub async fn batch(
 
 #[tokio::test]
 async fn batch_test() {
-  new_test(|mut processors: Vec<Processor>| async move {
-    let (processor_is, substrate_key, _) = key_gen::<Secp256k1>(&mut processors).await;
+  new_test(
+    |mut processors: Vec<Processor>| async move {
+      // pop the last participant since genesis keygen has only 4 participant.
+      processors.pop().unwrap();
+      assert_eq!(processors.len(), COORDINATORS);
+
+      let (processor_is, substrate_key, _) =
+        key_gen::<Secp256k1>(&mut processors, Session(0)).await;
       batch(
         &mut processors,
         &processor_is,
@@ -275,6 +281,8 @@ async fn batch_test() {
         },
       )
       .await;
-  })
+    },
+    false,
+  )
   .await;
 }

tests/coordinator/src/tests/key_gen.rs

@@ -23,13 +23,17 @@ use crate::tests::*;
 
 pub async fn key_gen<C: Ciphersuite>(
   processors: &mut [Processor],
+  session: Session,
 ) -> (Vec<u8>, Zeroizing<<Ristretto as Ciphersuite>::F>, Zeroizing<C::F>) {
+  let coordinators = processors.len();
   let mut participant_is = vec![];
 
-  let set = ValidatorSet { session: Session(0), network: NetworkId::Bitcoin };
+  let set = ValidatorSet { session, network: NetworkId::Bitcoin };
   let id = KeyGenId { session: set.session, attempt: 0 };
 
   for (i, processor) in processors.iter_mut().enumerate() {
+    let mut found = false;
+    while !found {
       let msg = processor.recv_message().await;
       match &msg {
         CoordinatorMessage::KeyGen(messages::key_gen::CoordinatorMessage::GenerateKey {
@@ -37,6 +41,12 @@ pub async fn key_gen<C: Ciphersuite>(
           ..
         }) => {
           participant_is.push(params.i());
+          found = true;
+        }
+        CoordinatorMessage::Substrate(
+          messages::substrate::CoordinatorMessage::ConfirmKeyPair { .. },
+        ) => {
+          continue;
         }
         _ => panic!("unexpected message: {msg:?}"),
       }
@@ -46,14 +56,15 @@ pub async fn key_gen<C: Ciphersuite>(
         CoordinatorMessage::KeyGen(messages::key_gen::CoordinatorMessage::GenerateKey {
           id,
           params: ThresholdParams::new(
-          u16::try_from(((COORDINATORS * 2) / 3) + 1).unwrap(),
-          u16::try_from(COORDINATORS).unwrap(),
+            u16::try_from(((coordinators * 2) / 3) + 1).unwrap(),
+            u16::try_from(coordinators).unwrap(),
             participant_is[i],
           )
           .unwrap(),
           shares: 1,
         })
       );
+    }
 
     processor
       .send_message(messages::key_gen::ProcessorMessage::Commitments {
@@ -65,7 +76,7 @@ pub async fn key_gen<C: Ciphersuite>(
 
   wait_for_tributary().await;
   for (i, processor) in processors.iter_mut().enumerate() {
-    let mut commitments = (0 .. u8::try_from(COORDINATORS).unwrap())
+    let mut commitments = (0 .. u8::try_from(coordinators).unwrap())
       .map(|l| {
         (
           participant_is[usize::from(l)],
@@ -83,7 +94,7 @@ pub async fn key_gen<C: Ciphersuite>(
     );
 
     // Recipient it's for -> (Sender i, Recipient i)
-    let mut shares = (0 .. u8::try_from(COORDINATORS).unwrap())
+    let mut shares = (0 .. u8::try_from(coordinators).unwrap())
       .map(|l| {
         (
           participant_is[usize::from(l)],
@@ -118,7 +129,7 @@ pub async fn key_gen<C: Ciphersuite>(
       CoordinatorMessage::KeyGen(messages::key_gen::CoordinatorMessage::Shares {
         id,
         shares: {
-          let mut shares = (0 .. u8::try_from(COORDINATORS).unwrap())
+          let mut shares = (0 .. u8::try_from(coordinators).unwrap())
             .map(|l| {
               (
                 participant_is[usize::from(l)],
@@ -182,14 +193,14 @@ pub async fn key_gen<C: Ciphersuite>(
               .unwrap()
               .as_secs()
               .abs_diff(context.serai_time) <
-              70
+              (60 * 60 * 3) // 3hrs
           );
           assert_eq!(context.network_latest_finalized_block.0, [0; 32]);
           assert_eq!(set.session, session);
           assert_eq!(key_pair.0 .0, substrate_key);
           assert_eq!(&key_pair.1, &network_key);
         }
-        _ => panic!("coordinator didn't respond with ConfirmKeyPair"),
+        _ => panic!("coordinator didn't respond with ConfirmKeyPair msg: {:?} ", msg),
       }
       message = Some(msg);
     } else {
@@ -220,8 +231,15 @@ pub async fn key_gen<C: Ciphersuite>(
 
 #[tokio::test]
 async fn key_gen_test() {
-  new_test(|mut processors: Vec<Processor>| async move {
-    key_gen::<Secp256k1>(&mut processors).await;
-  })
+  new_test(
+    |mut processors: Vec<Processor>| async move {
+      // pop the last participant since genesis keygen has only 4 participant.
+      processors.pop().unwrap();
+      assert_eq!(processors.len(), COORDINATORS);
+
+      key_gen::<Secp256k1>(&mut processors, Session(0)).await;
+    },
+    false,
+  )
   .await;
 }

tests/coordinator/src/tests/mod.rs

@@ -22,6 +22,10 @@ mod sign;
 #[allow(unused_imports)]
 pub use sign::sign;
 
+mod rotation;
+#[allow(unused_imports)]
+pub use rotation::rotate;
+
 pub(crate) const COORDINATORS: usize = 4;
 pub(crate) const THRESHOLD: usize = ((COORDINATORS * 2) / 3) + 1;
 
@@ -39,13 +43,13 @@ impl<F: Send + Future, TB: 'static + Send + Sync + Fn(Vec<Processor>) -> F> Test
   }
 }
 
-pub(crate) async fn new_test(test_body: impl TestBody) {
+pub(crate) async fn new_test(test_body: impl TestBody, fast_epoch: bool) {
   let mut unique_id_lock = UNIQUE_ID.get_or_init(|| Mutex::new(0)).lock().await;
 
   let mut coordinators = vec![];
   let mut test = DockerTest::new().with_network(dockertest::Network::Isolated);
   let mut coordinator_compositions = vec![];
-  for i in 0 .. COORDINATORS {
+  for i in 0 .. 5 {
     let name = match i {
       0 => "Alice",
       1 => "Bob",
@@ -55,7 +59,7 @@ pub(crate) async fn new_test(test_body: impl TestBody) {
       5 => "Ferdie",
       _ => panic!("needed a 7th name for a serai node"),
     };
-    let serai_composition = serai_composition(name);
+    let serai_composition = serai_composition(name, fast_epoch);
 
     let (processor_key, message_queue_keys, message_queue_composition) =
       serai_message_queue_tests::instance();

tests/coordinator/src/tests/rotation.rs

@@ -0,0 +1,191 @@
+use tokio::time::{sleep, Duration};
+
+use zeroize::Zeroizing;
+use ciphersuite::{Ciphersuite, Ristretto, Secp256k1};
+
+use serai_client::{
+  primitives::{insecure_pair_from_name, NetworkId},
+  validator_sets::{
+    self,
+    primitives::{Session, ValidatorSet},
+    ValidatorSetsEvent,
+  },
+  Amount, Pair, Transaction,
+};
+use crate::{*, tests::*};
+
+async fn publish_tx(serai: &Serai, tx: &Transaction) -> [u8; 32] {
+  let mut latest = serai
+    .block(serai.latest_finalized_block_hash().await.unwrap())
+    .await
+    .unwrap()
+    .unwrap()
+    .number();
+
+  serai.publish(tx).await.unwrap();
+
+  // Get the block it was included in
+  // TODO: Add an RPC method for this/check the guarantee on the subscription
+  let mut ticks = 0;
+  loop {
+    latest += 1;
+
+    let block = {
+      let mut block;
+      while {
+        block = serai.finalized_block_by_number(latest).await.unwrap();
+        block.is_none()
+      } {
+        sleep(Duration::from_secs(1)).await;
+        ticks += 1;
+
+        if ticks > 60 {
+          panic!("60 seconds without inclusion in a finalized block");
+        }
+      }
+      block.unwrap()
+    };
+
+    for transaction in &block.transactions {
+      if transaction == tx {
+        return block.hash();
+      }
+    }
+  }
+}
+
+#[allow(dead_code)]
+async fn allocate_stake(
+  serai: &Serai,
+  network: NetworkId,
+  amount: Amount,
+  pair: &Pair,
+  nonce: u32,
+) -> [u8; 32] {
+  // get the call
+  let tx =
+    serai.sign(&pair, validator_sets::SeraiValidatorSets::allocate(network, amount), nonce, 0);
+  publish_tx(serai, &tx).await
+}
+
+#[allow(dead_code)]
+async fn deallocate_stake(
+  serai: &Serai,
+  network: NetworkId,
+  amount: Amount,
+  pair: &Pair,
+  nonce: u32,
+) -> [u8; 32] {
+  // get the call
+  let tx =
+    serai.sign(&pair, validator_sets::SeraiValidatorSets::deallocate(network, amount), nonce, 0);
+  publish_tx(serai, &tx).await
+}
+
+async fn wait_till_next_epoch(serai: &Serai, current_epoch: u32) -> Session {
+  let mut session = Session(current_epoch);
+  while session.0 < current_epoch + 1 {
+    sleep(Duration::from_secs(6)).await;
+    session = serai
+      .as_of_latest_finalized_block()
+      .await
+      .unwrap()
+      .validator_sets()
+      .session(NetworkId::Serai)
+      .await
+      .unwrap()
+      .unwrap();
+
+    println!("current session: {} ", session.0);
+  }
+  session
+}
+
+async fn get_session(serai: &Serai, block: [u8; 32], network: NetworkId) -> Session {
+  serai.as_of(block).validator_sets().session(network).await.unwrap().unwrap()
+}
+
+async fn new_set_events(
+  serai: &Serai,
+  session: Session,
+  network: NetworkId,
+) -> Vec<ValidatorSetsEvent> {
+  let mut current_block = serai.latest_finalized_block().await.unwrap();
+  let mut current_session = get_session(serai, current_block.hash(), network).await;
+
+  while current_session == session {
+    let mut events =
+      serai.as_of(current_block.hash()).validator_sets().new_set_events().await.unwrap();
+    if !events.is_empty() {
+      return events;
+    }
+
+    current_block = serai.block(current_block.header.parent_hash.0).await.unwrap().unwrap();
+    current_session = get_session(serai, current_block.hash(), network).await;
+  }
+
+  panic!("can't find the new set events for session: {} ", session.0);
+}
+
+pub async fn rotate(
+  processors: &mut Vec<Processor>,
+  excluded: Processor,
+  _: &[u8],
+  _: &Zeroizing<<Ristretto as Ciphersuite>::F>,
+) {
+  // accounts
+  let pair1 = insecure_pair_from_name("Alice");
+  let pair5 = insecure_pair_from_name("Eve");
+
+  let network = NetworkId::Bitcoin;
+  let amount = Amount(1_000_000 * 10_u64.pow(8));
+  let serai = processors[0].serai().await;
+
+  // add the last participant into validator set for btc network
+  let block = allocate_stake(&serai, network, amount, &pair5, 0).await;
+
+  // wait until next session to see the effect on coordinator
+  let current_epoch = get_session(&serai, block, NetworkId::Serai).await;
+  let session = wait_till_next_epoch(&serai, current_epoch.0).await;
+
+  // verfiy that coordinator received new_set
+  let events = new_set_events(&serai, session, network).await;
+  assert!(events.contains(&ValidatorSetsEvent::NewSet { set: ValidatorSet { session, network } }));
+
+  // do the keygen
+  processors.push(excluded);
+  let _ = key_gen::<Secp256k1>(processors, session).await;
+
+  // pop 1 participant
+  let block = deallocate_stake(&serai, network, amount, &pair1, 0).await;
+
+  // wait for this epoch to end
+  let current_epoch = get_session(&serai, block, NetworkId::Serai).await;
+  let session = wait_till_next_epoch(&serai, current_epoch.0).await;
+
+  // verfiy that coordinator received new_set
+  let events = new_set_events(&serai, session, network).await;
+  assert!(events.contains(&ValidatorSetsEvent::NewSet { set: ValidatorSet { session, network } }));
+
+  // do the keygen
+  processors.remove(0);
+  let _ = key_gen::<Secp256k1>(processors, session).await;
+}
+
+#[tokio::test]
+async fn set_rotation_test() {
+  new_test(
+    |mut processors: Vec<Processor>| async move {
+      // exclude the last processor from keygen since we will add him later
+      let excluded = processors.pop().unwrap();
+      assert_eq!(processors.len(), COORDINATORS);
+
+      let (processor_is, substrate_key, _) =
+        key_gen::<Secp256k1>(&mut processors, Session(0)).await;
+
+      rotate(&mut processors, excluded, &processor_is, &substrate_key).await;
+    },
+    true,
+  )
+  .await;
+}

tests/coordinator/src/tests/sign.rs

@@ -168,8 +168,14 @@ pub async fn sign(
 
 #[tokio::test]
 async fn sign_test() {
-  new_test(|mut processors: Vec<Processor>| async move {
-    let (participant_is, substrate_key, _) = key_gen::<Secp256k1>(&mut processors).await;
+  new_test(
+    |mut processors: Vec<Processor>| async move {
+      // pop the last participant since genesis keygen has only 4 participant.
+      processors.pop().unwrap();
+      assert_eq!(processors.len(), COORDINATORS);
+
+      let (participant_is, substrate_key, _) =
+        key_gen::<Secp256k1>(&mut processors, Session(0)).await;
 
       // 'Send' external coins into Serai
       let serai = processors[0].serai().await;
@@ -222,7 +228,10 @@ async fn sign_test() {
 
         let serai = serai.as_of(block_included_in_hash);
         let serai = serai.coins();
-      assert_eq!(serai.coin_balance(Coin::Serai, serai_addr).await.unwrap(), Amount(1_000_000_000));
+        assert_eq!(
+          serai.coin_balance(Coin::Serai, serai_addr).await.unwrap(),
+          Amount(1_000_000_000)
+        );
 
         // Verify the mint occurred as expected
         assert_eq!(
@@ -323,6 +332,8 @@ async fn sign_test() {
       }
 
       sign(&mut processors, &participant_is, Session(0), plan_id).await;
-  })
+    },
+    false,
+  )
   .await;
 }

tests/full-stack/src/tests/mod.rs

@@ -65,7 +65,7 @@ pub(crate) async fn new_test(test_body: impl TestBody) {
       processor_instance(NetworkId::Monero, monero_port, message_queue_keys[&NetworkId::Monero]);
 
     let coordinator_composition = coordinator_instance(name, coord_key);
-    let serai_composition = serai_composition(name);
+    let serai_composition = serai_composition(name, false);
 
     // Give every item in this stack a unique ID
     // Uses a Mutex as we can't generate a 8-byte random ID without hitting hostname length limits