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Add comments to beacon chain fork choice

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This commit is contained in:
Paul Hauner 2019-02-01 18:18:39 +11:00
parent 865919e398
commit 5ca53190b5
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GPG Key ID: D362883A9218FCC6
2 changed files with 6 additions and 5 deletions
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1
beacon_node/beacon_chain/src/lib.rs
View File

@ -56,6 +56,7 @@ where
T: ClientDB, T: ClientDB,
U: SlotClock, U: SlotClock,
{ {
/// Instantiate a new Beacon Chain, from genesis.
pub fn genesis( pub fn genesis(
state_store: Arc<BeaconStateStore<T>>, state_store: Arc<BeaconStateStore<T>>,
block_store: Arc<BeaconBlockStore<T>>, block_store: Arc<BeaconBlockStore<T>>,

10
beacon_node/beacon_chain/src/lmd_ghost.rs
View File

@ -12,11 +12,6 @@ use types::{
Hash256, Hash256,
}; };
#[derive(Debug, PartialEq)]
pub enum Outcome {
Something,
}
#[derive(Debug, PartialEq)] #[derive(Debug, PartialEq)]
pub enum Error { pub enum Error {
DBError(String), DBError(String),
@ -32,6 +27,7 @@ where
U: SlotClock, U: SlotClock,
Error: From<<U as SlotClock>::Error>, Error: From<<U as SlotClock>::Error>,
{ {
/// Run the fork-choice rule on the current chain, updating the canonical head, if required.
pub fn fork_choice(&self) -> Result<(), Error> { pub fn fork_choice(&self) -> Result<(), Error> {
let present_head = &self.finalized_head().beacon_block_root; let present_head = &self.finalized_head().beacon_block_root;
@ -56,6 +52,7 @@ where
Ok(()) Ok(())
} }
/// A very inefficient implementation of LMD ghost.
pub fn slow_lmd_ghost(&self, start_hash: &Hash256) -> Result<Hash256, Error> { pub fn slow_lmd_ghost(&self, start_hash: &Hash256) -> Result<Hash256, Error> {
let start = self let start = self
.block_store .block_store
@ -114,6 +111,9 @@ where
} }
} }
/// Get the total number of votes for some given block root.
///
/// The vote count is incrememented each time an attestation target votes for a block root.
fn get_vote_count<T: ClientDB>( fn get_vote_count<T: ClientDB>(
block_store: &Arc<BeaconBlockStore<T>>, block_store: &Arc<BeaconBlockStore<T>>,
attestation_targets: &[Hash256], attestation_targets: &[Hash256],