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Store states efficiently in the hot database (#746)

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* Sparse hot DB and block root tree

* Fix store_tests

* Ensure loads of hot states on boundaries are fast

* Milder error for unaligned finalized blocks
This commit is contained in:
Michael Sproul
2020-01-08 13:58:01 +11:00
committed by GitHub
parent 26dde26c48
commit f36a5a15d6
18 changed files with 953 additions and 226 deletions
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15
eth2/types/src/beacon_state.rs
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@@ -464,6 +464,21 @@ impl<T: EthSpec> BeaconState<T> {
Ok(hash(&preimage))
}
/// Get the canonical root of the `latest_block_header`, filling in its state root if necessary.
///
/// It needs filling in on all slots where there isn't a skip.
///
/// Spec v0.9.1
pub fn get_latest_block_root(&self, current_state_root: Hash256) -> Hash256 {
if self.latest_block_header.state_root.is_zero() {
let mut latest_block_header = self.latest_block_header.clone();
latest_block_header.state_root = current_state_root;
latest_block_header.canonical_root()
} else {
self.latest_block_header.canonical_root()
}
}
/// Safely obtains the index for latest block roots, given some `slot`.
///
/// Spec v0.9.1