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Use the database to persist the pubkey cache (#2234)

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## Issue Addressed

Closes #1787

## Proposed Changes

* Abstract the `ValidatorPubkeyCache` over a "backing" which is either a file (legacy), or the database.
* Implement a migration from schema v2 to schema v3, whereby the contents of the cache file are copied to the DB, and then the file is deleted. The next release to include this change must be a minor version bump, and we will need to warn users of the inability to downgrade (this is our first DB schema change since mainnet genesis).
* Move the schema migration code from the `store` crate into the `beacon_chain` crate so that it can access the datadir and the `ValidatorPubkeyCache`, etc. It gets injected back into the `store` via a closure (similar to what we do in fork choice).
This commit is contained in:
Michael Sproul
2021-03-04 01:25:12 +00:00
parent c370100719
commit 363f15f362
17 changed files with 262 additions and 146 deletions
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10
beacon_node/beacon_chain/src/block_verification.rs
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@@ -1336,7 +1336,7 @@ fn cheap_state_advance_to_obtain_committees<'a, E: EthSpec>(
/// Obtains a read-locked `ValidatorPubkeyCache` from the `chain`.
fn get_validator_pubkey_cache<T: BeaconChainTypes>(
chain: &BeaconChain<T>,
) -> Result<RwLockReadGuard<ValidatorPubkeyCache>, BlockError<T::EthSpec>> {
) -> Result<RwLockReadGuard<ValidatorPubkeyCache<T>>, BlockError<T::EthSpec>> {
chain
.validator_pubkey_cache
.try_read_for(VALIDATOR_PUBKEY_CACHE_LOCK_TIMEOUT)
@@ -1348,11 +1348,11 @@ fn get_validator_pubkey_cache<T: BeaconChainTypes>(
///
/// The signature verifier is empty because it does not yet have any of this block's signatures
/// added to it. Use `Self::apply_to_signature_verifier` to apply the signatures.
fn get_signature_verifier<'a, E: EthSpec>(
state: &'a BeaconState<E>,
validator_pubkey_cache: &'a ValidatorPubkeyCache,
fn get_signature_verifier<'a, T: BeaconChainTypes>(
state: &'a BeaconState<T::EthSpec>,
validator_pubkey_cache: &'a ValidatorPubkeyCache<T>,
spec: &'a ChainSpec,
) -> BlockSignatureVerifier<'a, E, impl Fn(usize) -> Option<Cow<'a, PublicKey>> + Clone> {
) -> BlockSignatureVerifier<'a, T::EthSpec, impl Fn(usize) -> Option<Cow<'a, PublicKey>> + Clone> {
BlockSignatureVerifier::new(
state,
move |validator_index| {