commonware-glue 2026.9.0

#![allow(dead_code)]

use crate::dkg::{
    ParticipantsProvider, Registrar, ReshareBlock, SecretStore,
    network::{Addresses, Directory as DkgDirectory, Manager as DkgManager},
    orchestrator, reshare,
    types::{Payload, SchemeInfo},
};
use bytes::{Buf, BufMut};
use commonware_actor::Feedback;
use commonware_codec::{
    Codec, Decode, Encode, EncodeSize, Error as CodecError, Read, ReadExt, Write, varint::UInt,
};
use commonware_consensus::{
    Automaton, Block, CertifiableAutomaton, Heightable, Relay, Reporter,
    marshal::{
        self, Start as MarshalStart, Update,
        core::{Actor as MarshalActor, Mailbox as MarshalMailbox},
        standard::Standard,
    },
    simplex::{
        self, ForwardPolicy, Plan, SkipPolicy, elector::RoundRobin, mocks::scheme, types::Context,
    },
    types::{Epoch, FixedEpocher, Height, Round, View, ViewDelta},
};
use commonware_cryptography::{
    Digest, Digestible, Hasher, PublicKey as CryptoPublicKey, Signer,
    bls12381::{
        dkg::feldman_desmedt::DealerPrivMsg,
        primitives::{
            group::Share,
            variant::{MinPk, Variant},
        },
    },
    certificate::{ConstantProvider, Verifier as _},
    ed25519::{PrivateKey, PublicKey},
    sha256::{Digest as Sha256Digest, Sha256},
    transcript::Summary,
};
use commonware_p2p::{
    Message as P2pMessage, Provider, Receiver, TrackedPeers,
    simulated::{Control, Manager as SimManager},
    utils::mux,
};
use commonware_parallel::Sequential;
use commonware_runtime::{Supervisor as _, buffer::paged::CacheRef, deterministic};
use commonware_storage::archive::immutable;
use commonware_utils::{
    Acknowledgement, NZU16, NZU64, NZUsize,
    acknowledgement::Exact,
    channel::{fallible::OneshotExt, oneshot},
    ordered::Set,
    sequence::Unit,
    sync::Mutex,
};
use std::{
    collections::{BTreeMap, HashSet},
    marker::PhantomData,
    num::{NonZeroU32, NonZeroU64},
    sync::Arc,
    time::Duration,
};

pub(crate) type TestDigest = Sha256Digest;
pub(crate) type TestPublicKey = PublicKey;
pub(crate) type TestSigner = PrivateKey;
pub(crate) type TestContext = Context<TestDigest, TestPublicKey>;
pub(crate) type TestBlock = MockBlock<TestDigest, TestContext>;
pub(crate) type TestMarshalVariant = Standard<TestBlock>;
pub(crate) type TestBlsVariant = MinPk;
pub(crate) type TestScheme = scheme::Scheme<TestPublicKey>;
pub(crate) type TestProvider = ConstantProvider<TestScheme, Epoch>;
pub(crate) type TestElector = RoundRobin;
pub(crate) type TestStrategy = Sequential;
pub(crate) type TestBlocker = Control<TestPublicKey, deterministic::Context>;
pub(crate) type TestManager = SimManager<TestPublicKey, deterministic::Context>;
pub(crate) type TestMailbox = orchestrator::Mailbox<TestBlock>;
pub(crate) type TestMarshalMailbox = MarshalMailbox<TestScheme, TestMarshalVariant>;

#[derive(Clone, Copy, Debug, thiserror::Error)]
#[error("peer set unavailable")]
pub(crate) struct TrackFailed;

#[derive(Clone, Debug)]
pub(crate) struct FailingManager<M>(pub(crate) M);

impl<M: Provider> Provider for FailingManager<M> {
    type PublicKey = M::PublicKey;

    async fn peer_set(&mut self, id: u64) -> Option<TrackedPeers<Self::PublicKey>> {
        self.0.peer_set(id).await
    }

    async fn subscribe(&mut self) -> commonware_p2p::PeerSetSubscription<Self::PublicKey> {
        self.0.subscribe().await
    }
}

impl<M: Provider> DkgManager for FailingManager<M> {
    type Directory = Unit;
    type Error = TrackFailed;

    fn track(
        &mut self,
        _epoch: Epoch,
        _peers: TrackedPeers<Self::PublicKey>,
        _directory: &Self::Directory,
    ) -> Result<(), Self::Error> {
        Err(TrackFailed)
    }
}
type DirectoryTracks = Arc<Mutex<Vec<(Epoch, TrackedPeers<PublicKey>, Addresses<PublicKey>)>>>;

#[derive(Clone, Debug)]
pub(crate) struct DirectoryManager<M> {
    inner: M,
    tracked: DirectoryTracks,
}

impl<M> DirectoryManager<M> {
    pub(crate) fn new(inner: M) -> Self {
        Self {
            inner,
            tracked: Arc::default(),
        }
    }

    pub(crate) fn tracked(&self) -> Vec<(Epoch, TrackedPeers<PublicKey>, Addresses<PublicKey>)> {
        self.tracked.lock().clone()
    }
}

impl<M: Provider<PublicKey = PublicKey>> Provider for DirectoryManager<M> {
    type PublicKey = PublicKey;

    async fn peer_set(&mut self, id: u64) -> Option<TrackedPeers<Self::PublicKey>> {
        self.inner.peer_set(id).await
    }

    async fn subscribe(&mut self) -> commonware_p2p::PeerSetSubscription<Self::PublicKey> {
        self.inner.subscribe().await
    }
}

impl<M> DkgManager for DirectoryManager<M>
where
    M: DkgManager<PublicKey = PublicKey, Directory = Unit>,
{
    type Directory = Addresses<PublicKey>;
    type Error = M::Error;

    fn track(
        &mut self,
        epoch: Epoch,
        peers: TrackedPeers<Self::PublicKey>,
        directory: &Self::Directory,
    ) -> Result<(), Self::Error> {
        self.tracked
            .lock()
            .push((epoch, peers.clone(), directory.clone()));
        self.inner.track(epoch, peers, &Unit)
    }
}

pub(crate) type TestActor = orchestrator::Actor<
    deterministic::Context,
    TestBlocker,
    TestManager,
    TestProvider,
    TestMarshalVariant,
    TestBlsVariant,
    TestSigner,
    MockApplication,
    TestElector,
    TestStrategy,
>;

pub(crate) type TestReshareActor = reshare::Actor<
    deterministic::Context,
    TestBlock,
    TestBlsVariant,
    TestSigner,
    TestManager,
    TestBlocker,
    StaticParticipants,
    MemorySecretStore,
    Sequential,
    commonware_cryptography::ed25519::Batch,
    TestScheme,
    TestMarshalVariant,
    MockConsumer,
>;

#[derive(Clone)]
pub(crate) struct StaticParticipants(pub(crate) Set<TestPublicKey>);

impl ParticipantsProvider for StaticParticipants {
    type PublicKey = TestPublicKey;
    type Directory = Unit;

    async fn participants(&mut self, _epoch: Epoch) -> Set<Self::PublicKey> {
        self.0.clone()
    }

    async fn directory(&mut self, _: Epoch, _: Set<Self::PublicKey>) -> Self::Directory {
        Unit
    }
}

const NAMESPACE: &[u8] = b"_COMMONWARE_GLUE_DKG_ORCHESTRATOR_TEST";

#[derive(Debug)]
pub(crate) struct FilteredReceiver<R> {
    inner: R,
    filter: Filter,
}

#[derive(Debug)]
enum Filter {
    None,
    All,
    Epochs(Arc<HashSet<u64>>),
}

impl<R> FilteredReceiver<R> {
    pub(crate) const fn pass(inner: R) -> Self {
        Self {
            inner,
            filter: Filter::None,
        }
    }

    pub(crate) const fn drop_all(inner: R) -> Self {
        Self {
            inner,
            filter: Filter::All,
        }
    }

    pub(crate) const fn epochs(inner: R, epochs: Arc<HashSet<u64>>) -> Self {
        Self {
            inner,
            filter: Filter::Epochs(epochs),
        }
    }
}

impl<R: Receiver> Receiver for FilteredReceiver<R> {
    type Error = R::Error;
    type PublicKey = R::PublicKey;

    async fn recv(&mut self) -> Result<P2pMessage<Self::PublicKey>, Self::Error> {
        loop {
            let message = self.inner.recv().await?;
            match &self.filter {
                Filter::None => return Ok(message),
                Filter::All => {}
                Filter::Epochs(epochs) => {
                    let (_, bytes) = &message;
                    let (epoch, _) =
                        mux::parse(bytes.clone()).expect("failed to parse mux message");
                    if !epochs.contains(&epoch) {
                        return Ok(message);
                    }
                }
            }
        }
    }
}

#[derive(Clone, Debug, PartialEq, Eq)]
#[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
pub(crate) struct MockBlock<D: Digest, C, Dir = Unit> {
    context: C,
    parent: D,
    height: Height,
    timestamp: u64,
    payload: Option<EncodedPayload>,
    digest: D,
    _directory: PhantomData<Dir>,
}

#[derive(Clone, Debug, PartialEq, Eq)]
#[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
pub(crate) struct EncodedPayload {
    max_participants: NonZeroU32,
    bytes: Vec<u8>,
}

impl EncodedPayload {
    pub(crate) fn new<V, S, Dir>(max_participants: NonZeroU32, payload: Payload<V, S, Dir>) -> Self
    where
        V: Variant,
        S: Signer,
        Dir: DkgDirectory<S::PublicKey>,
    {
        Self {
            max_participants,
            bytes: payload.encode().to_vec(),
        }
    }

    fn decode<V, S, Dir>(&self) -> Option<Payload<V, S, Dir>>
    where
        V: Variant,
        S: Signer,
        Dir: DkgDirectory<S::PublicKey>,
    {
        Payload::decode_cfg(
            self.bytes.as_slice(),
            &(
                self.max_participants,
                crate::dkg::tests::max_supported_mode(),
            ),
        )
        .ok()
    }

    fn write(&self, writer: &mut impl BufMut) {
        UInt(self.max_participants.get()).write(writer);
        UInt(u32::try_from(self.bytes.len()).expect("payload too large")).write(writer);
        writer.put_slice(&self.bytes);
    }

    fn read(reader: &mut impl Buf) -> Result<Self, CodecError> {
        let max_participants = NonZeroU32::new(UInt::<u32>::read(reader)?.into()).ok_or(
            CodecError::Invalid("EncodedPayload", "max participants must be non-zero"),
        )?;
        let len: u32 = UInt::read(reader)?.into();
        let len = len as usize;
        if reader.remaining() < len {
            return Err(CodecError::EndOfBuffer);
        }
        let bytes = reader.copy_to_bytes(len).to_vec();
        Ok(Self {
            max_participants,
            bytes,
        })
    }

    fn encode_size(&self) -> usize {
        UInt(self.max_participants.get()).encode_size()
            + UInt(u32::try_from(self.bytes.len()).expect("payload too large")).encode_size()
            + self.bytes.len()
    }
}

impl<D: Digest, C: Codec, Dir> MockBlock<D, C, Dir> {
    pub(crate) fn new<H: Hasher<Digest = D>>(
        context: C,
        parent: D,
        height: Height,
        timestamp: u64,
    ) -> Self {
        Self::from_parts::<H>(context, parent, height, timestamp, None)
    }

    pub(crate) fn with_payload<H, V, S>(
        self,
        max_participants: NonZeroU32,
        payload: Payload<V, S, Dir>,
    ) -> Self
    where
        H: Hasher<Digest = D>,
        V: Variant,
        S: Signer,
        Dir: DkgDirectory<S::PublicKey>,
    {
        Self::from_parts::<H>(
            self.context,
            self.parent,
            self.height,
            self.timestamp,
            Some(EncodedPayload::new(max_participants, payload)),
        )
    }

    pub(crate) const fn context(&self) -> &C {
        &self.context
    }

    fn from_parts<H: Hasher<Digest = D>>(
        context: C,
        parent: D,
        height: Height,
        timestamp: u64,
        payload: Option<EncodedPayload>,
    ) -> Self {
        let height_be = height.get().to_be_bytes();
        let context_enc = context.encode();
        let timestamp_be = timestamp.to_be_bytes();
        let digest = payload.as_ref().map_or_else(
            || H::hash(&[&parent, &height_be, &context_enc, &timestamp_be, &[0]]),
            |payload| {
                H::hash(&[
                    &parent,
                    &height_be,
                    &context_enc,
                    &timestamp_be,
                    &[1],
                    &payload.max_participants.get().to_be_bytes(),
                    &u32::try_from(payload.bytes.len())
                        .expect("payload too large")
                        .to_be_bytes(),
                    &payload.bytes,
                ])
            },
        );
        Self {
            context,
            parent,
            height,
            timestamp,
            payload,
            digest,
            _directory: PhantomData,
        }
    }
}

impl<D: Digest, C: Write, Dir> Write for MockBlock<D, C, Dir> {
    fn write(&self, writer: &mut impl BufMut) {
        self.context.write(writer);
        self.parent.write(writer);
        self.height.write(writer);
        UInt(self.timestamp).write(writer);
        self.payload.is_some().write(writer);
        if let Some(log) = &self.payload {
            log.write(writer);
        }
        self.digest.write(writer);
    }
}

impl<D: Digest, C: Read<Cfg = ()>, Dir> Read for MockBlock<D, C, Dir> {
    type Cfg = ();

    fn read_cfg(reader: &mut impl Buf, _: &Self::Cfg) -> Result<Self, CodecError> {
        Ok(Self {
            context: C::read(reader)?,
            parent: D::read(reader)?,
            height: Height::read(reader)?,
            timestamp: UInt::read(reader)?.into(),
            payload: if bool::read(reader)? {
                Some(EncodedPayload::read(reader)?)
            } else {
                None
            },
            digest: D::read(reader)?,
            _directory: PhantomData,
        })
    }
}

impl<D: Digest, C: EncodeSize, Dir> EncodeSize for MockBlock<D, C, Dir> {
    fn encode_size(&self) -> usize {
        self.context.encode_size()
            + self.parent.encode_size()
            + self.height.encode_size()
            + UInt(self.timestamp).encode_size()
            + self.payload.is_some().encode_size()
            + self.payload.as_ref().map_or(0, EncodedPayload::encode_size)
            + self.digest.encode_size()
    }
}

impl<D: Digest, C: Clone + Send + Sync + 'static, Dir: Clone + Send + Sync + 'static> Digestible
    for MockBlock<D, C, Dir>
{
    type Digest = D;

    fn digest(&self) -> D {
        self.digest
    }
}

impl<D: Digest, C: Clone + Send + Sync + 'static, Dir: Clone + Send + Sync + 'static> Heightable
    for MockBlock<D, C, Dir>
{
    fn height(&self) -> Height {
        self.height
    }
}

impl<D: Digest, C: Codec<Cfg = ()> + Clone + Send + Sync + 'static, Dir> Block
    for MockBlock<D, C, Dir>
where
    Dir: Clone + Send + Sync + 'static,
{
    fn parent(&self) -> Self::Digest {
        self.parent
    }
}

impl<D, C, Dir> ReshareBlock for MockBlock<D, C, Dir>
where
    D: Digest,
    C: Codec<Cfg = ()> + Clone + Send + Sync + 'static,
    Dir: DkgDirectory<TestPublicKey>,
{
    type Variant = TestBlsVariant;
    type Signer = TestSigner;
    type Directory = Dir;

    fn payload(&self) -> Option<Payload<Self::Variant, Self::Signer, Self::Directory>> {
        self.payload.as_ref()?.decode()
    }
}

#[derive(Clone, Default)]
pub(crate) struct MockApplication {
    broadcasts: Arc<Mutex<Vec<TestDigest>>>,
    proposals: Arc<Mutex<Vec<TestContext>>>,
}

impl MockApplication {
    pub(crate) fn broadcasts(&self) -> Vec<TestDigest> {
        self.broadcasts.lock().clone()
    }

    pub(crate) fn proposals(&self) -> Vec<TestContext> {
        self.proposals.lock().clone()
    }
}

impl Automaton for MockApplication {
    type Context = TestContext;
    type Digest = TestDigest;

    async fn propose(&mut self, _context: Self::Context) -> oneshot::Receiver<Self::Digest> {
        let (sender, receiver) = oneshot::channel();
        self.proposals.lock().push(_context);
        sender.send_lossy(Sha256::hash(&[b"proposal"]));
        receiver
    }

    async fn verify(
        &mut self,
        _context: Self::Context,
        _payload: Self::Digest,
    ) -> oneshot::Receiver<bool> {
        let (sender, receiver) = oneshot::channel();
        sender.send_lossy(true);
        receiver
    }
}

impl CertifiableAutomaton for MockApplication {}

impl Relay for MockApplication {
    type Digest = TestDigest;
    type PublicKey = TestPublicKey;
    type Plan = Plan<TestPublicKey>;

    fn broadcast(&mut self, payload: Self::Digest, _plan: Self::Plan) -> Feedback {
        self.broadcasts.lock().push(payload);
        Feedback::Ok
    }
}

#[derive(Clone, Debug, PartialEq, Eq)]
pub(crate) enum ConsumerEvent {
    Enter(Epoch),
    Exit(Epoch),
}

#[derive(Clone, Default)]
pub(crate) struct MockConsumer {
    events: Arc<Mutex<Vec<ConsumerEvent>>>,
}

impl MockConsumer {
    pub(crate) fn events(&self) -> Vec<ConsumerEvent> {
        self.events.lock().clone()
    }
}

impl Registrar for MockConsumer {
    type Variant = TestBlsVariant;
    type PublicKey = TestPublicKey;

    async fn register(&self, epoch: Epoch, _info: SchemeInfo<Self::Variant, Self::PublicKey>) {
        self.events.lock().push(ConsumerEvent::Enter(epoch));
    }
}

#[derive(Clone, Default)]
pub(crate) struct MarshalApplication {
    blocks: Arc<Mutex<BTreeMap<Height, Arc<TestBlock>>>>,
}

impl MarshalApplication {
    pub(crate) fn blocks(&self) -> BTreeMap<Height, Arc<TestBlock>> {
        self.blocks.lock().clone()
    }
}

impl Reporter for MarshalApplication {
    type Activity = Update<TestBlock>;

    fn report(&mut self, activity: Self::Activity) -> Feedback {
        if let Update::Block(block, ack) = activity {
            self.blocks.lock().insert(block.height(), block);
            ack.acknowledge();
        }
        Feedback::Ok
    }
}

pub(crate) struct SchemeFixture {
    pub(crate) participants: Vec<TestPublicKey>,
    pub(crate) schemes: Vec<TestScheme>,
    pub(crate) provider: TestProvider,
}

pub(crate) fn scheme_fixture(context: &mut deterministic::Context) -> SchemeFixture {
    scheme_fixture_n(context, 1)
}

pub(crate) fn scheme_fixture_n(context: &mut deterministic::Context, n: u32) -> SchemeFixture {
    let fixture = scheme::fixture(context, NAMESPACE, n);
    let provider = ConstantProvider::new(fixture.schemes[0].clone());
    SchemeFixture {
        participants: fixture.participants,
        schemes: fixture.schemes,
        provider,
    }
}

pub(crate) fn genesis_block(leader: TestPublicKey) -> TestBlock {
    let digest = Sha256::hash(&[b""]);
    let context = TestContext {
        round: Round::new(Epoch::zero(), View::zero()),
        leader,
        parent: (View::zero(), digest),
    };
    TestBlock::new::<Sha256>(context, digest, Height::zero(), 0)
}

/// Builds a marshal mailbox whose actor is dropped before it starts.
///
/// Reads through the returned mailbox resolve as unavailable, which is useful
/// for phase tests that need a marshal handle but drive finalized blocks
/// directly.
pub(crate) async fn closed_marshal_mailbox(
    context: deterministic::Context,
    signer: &TestSigner,
    scheme: TestScheme,
    partition_prefix: &str,
    blocks_per_epoch: NonZeroU64,
) -> TestMarshalMailbox {
    let page_cache = CacheRef::from_pooler(&context, NZU16!(1024), NZUsize!(8));
    let finalizations_by_height =
        immutable::Archive::init(context.child("finalizations_by_height"), {
            let _: () = TestScheme::certificate_codec_config_unbounded();
            archive_config(partition_prefix, "finalizations", page_cache.clone(), ())
        })
        .await
        .expect("finalizations archive");
    let finalized_blocks = immutable::Archive::init(
        context.child("finalized_blocks"),
        archive_config(partition_prefix, "blocks", page_cache.clone(), ()),
    )
    .await
    .expect("blocks archive");

    let (actor, mailbox, _) = MarshalActor::<_, _, _, _, _, _, _, Exact>::init(
        context.child("marshal"),
        finalizations_by_height,
        finalized_blocks,
        marshal::Config {
            provider: TestProvider::new(scheme),
            epocher: FixedEpocher::new(blocks_per_epoch),
            start: MarshalStart::Genesis(genesis_block(signer.public_key())),
            partition_prefix: format!("{partition_prefix}-marshal"),
            mailbox_size: NZUsize!(16),
            view_retention: ViewDelta::new(8),
            prunable_items_per_section: NZU64!(10),
            page_cache,
            replay_buffer: NZUsize!(1024),
            key_write_buffer: NZUsize!(1024),
            value_write_buffer: NZUsize!(1024),
            block_codec_config: (),
            max_repair: NZUsize!(4),
            max_pending_acks: NZUsize!(4),
            strategy: Sequential,
        },
    )
    .await;
    drop(actor);
    mailbox
}

fn archive_config<C>(
    prefix: &str,
    name: &str,
    page_cache: CacheRef,
    codec_config: C,
) -> immutable::Config<C> {
    immutable::Config {
        metadata_partition: format!("{prefix}-{name}-metadata"),
        freezer_table_partition: format!("{prefix}-{name}-freezer-table"),
        freezer_table_initial_size: 64,
        freezer_table_resize_frequency: 10,
        freezer_table_resize_chunk_size: 10,
        freezer_key_partition: format!("{prefix}-{name}-freezer-key"),
        freezer_key_page_cache: page_cache,
        freezer_value_partition: format!("{prefix}-{name}-freezer-value"),
        freezer_value_target_size: 1024,
        freezer_value_compression: None,
        ordinal_partition: format!("{prefix}-{name}-ordinal"),
        items_per_section: NZU64!(10),
        codec_config,
        replay_buffer: NZUsize!(1024),
        freezer_key_write_buffer: NZUsize!(1024),
        freezer_value_write_buffer: NZUsize!(1024),
        ordinal_write_buffer: NZUsize!(1024),
    }
}

pub(crate) fn simplex_config() -> orchestrator::SimplexConfig<TestElector> {
    orchestrator::SimplexConfig {
        elector: TestElector::default(),
        mailbox_size: NZUsize!(16),
        replay_buffer: NZUsize!(1024),
        write_buffer: NZUsize!(1024),
        page_cache_page_size: NZU16!(1024),
        page_cache_pages: NZUsize!(8),
        leader_timeout: Duration::from_millis(100),
        certification_timeout: Duration::from_millis(200),
        timeout_retry: Duration::from_millis(500),
        fetch_timeout: Duration::from_millis(100),
        view_retention: ViewDelta::new(8),
        skip: SkipPolicy::Enabled {
            timeout: Duration::from_secs(1),
            budget: simplex::SkipBudget::Participants,
        },
        forward: ForwardPolicy::Disabled,
        track_historical_votes: false,
    }
}

/// In-memory [`SecretStore`] for tests.
///
/// Dealings are keyed by the encoded dealer key so the store works with any
/// [`PublicKey`](CryptoPublicKey). Pruned epochs are recorded for assertions.
#[derive(Clone, Default)]
pub(crate) struct MemorySecretStore {
    inner: Arc<Mutex<MemorySecretStoreInner>>,
}

#[derive(Default)]
struct MemorySecretStoreInner {
    shares: BTreeMap<Epoch, Share>,
    seeds: BTreeMap<Epoch, Summary>,
    dealings: BTreeMap<(Epoch, Vec<u8>), DealerPrivMsg>,
    prunes: Vec<Epoch>,
}

impl MemorySecretStore {
    /// Returns whether a share is held for `epoch`.
    pub(crate) fn has_share(&self, epoch: Epoch) -> bool {
        self.inner.lock().shares.contains_key(&epoch)
    }

    /// Returns the epochs passed to [`SecretStore::prune`], in call order.
    pub(crate) fn prunes(&self) -> Vec<Epoch> {
        self.inner.lock().prunes.clone()
    }

    /// Pre-seeds a share for `epoch`, for tests that install state before the
    /// actor starts.
    pub(crate) fn seed_share(&self, epoch: Epoch, share: Share) {
        self.inner.lock().shares.insert(epoch, share);
    }
}

impl SecretStore for MemorySecretStore {
    async fn put_share(&mut self, epoch: Epoch, share: Share) {
        self.inner.lock().shares.insert(epoch, share);
    }

    async fn get_share(&mut self, epoch: Epoch) -> Option<Share> {
        self.inner.lock().shares.get(&epoch).cloned()
    }

    async fn put_seed(&mut self, epoch: Epoch, seed: Summary) {
        self.inner.lock().seeds.insert(epoch, seed);
    }

    async fn get_seed(&mut self, epoch: Epoch) -> Option<Summary> {
        self.inner.lock().seeds.get(&epoch).cloned()
    }

    async fn put_dealing<P: CryptoPublicKey>(
        &mut self,
        epoch: Epoch,
        dealer: P,
        private: DealerPrivMsg,
    ) {
        self.inner
            .lock()
            .dealings
            .insert((epoch, dealer.encode().to_vec()), private);
    }

    async fn get_dealing<P: CryptoPublicKey>(
        &mut self,
        epoch: Epoch,
        dealer: &P,
    ) -> Option<DealerPrivMsg> {
        self.inner
            .lock()
            .dealings
            .get(&(epoch, dealer.encode().to_vec()))
            .cloned()
    }

    async fn prune(&mut self, min: Epoch) {
        let mut inner = self.inner.lock();
        inner.prunes.push(min);
        inner.shares.retain(|epoch, _| *epoch >= min);
        inner.seeds.retain(|epoch, _| *epoch >= min);
        inner.dealings.retain(|(epoch, _), _| *epoch >= min);
    }
}