mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2025-01-11 12:10:05 +00:00
84916672c6
* replace eth2 types * replace protos * regen proto * replace * gaz * deps * amend * regen proto * mod * gaz * gaz * ensure build * ssz * add dep * no more eth2 types * no more eth2 * remg * all builds * buidl * tidy * clean * fmt * val serv * gaz Co-authored-by: Preston Van Loon <preston@prysmaticlabs.com>
73 lines
2.3 KiB
Go
73 lines
2.3 KiB
Go
package blockchain
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import (
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"bytes"
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"context"
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"github.com/pkg/errors"
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types "github.com/prysmaticlabs/prysm/consensus-types/primitives"
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"github.com/prysmaticlabs/prysm/time/slots"
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)
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// NewSlot mimics the implementation of `on_tick` in fork choice consensus spec.
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// It resets the proposer boost root in fork choice, and it updates store's justified checkpoint
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// if a better checkpoint on the store's finalized checkpoint chain.
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// This should only be called at the start of every slot interval.
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//
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// Spec pseudocode definition:
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// # Reset store.proposer_boost_root if this is a new slot
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// if current_slot > previous_slot:
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// store.proposer_boost_root = Root()
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//
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// # Not a new epoch, return
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// if not (current_slot > previous_slot and compute_slots_since_epoch_start(current_slot) == 0):
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// return
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//
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// # Update store.justified_checkpoint if a better checkpoint on the store.finalized_checkpoint chain
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// if store.best_justified_checkpoint.epoch > store.justified_checkpoint.epoch:
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// finalized_slot = compute_start_slot_at_epoch(store.finalized_checkpoint.epoch)
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// ancestor_at_finalized_slot = get_ancestor(store, store.best_justified_checkpoint.root, finalized_slot)
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// if ancestor_at_finalized_slot == store.finalized_checkpoint.root:
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// store.justified_checkpoint = store.best_justified_checkpoint
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func (s *Service) NewSlot(ctx context.Context, slot types.Slot) error {
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// Reset proposer boost root in fork choice.
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if err := s.cfg.ForkChoiceStore.ResetBoostedProposerRoot(ctx); err != nil {
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return errors.Wrap(err, "could not reset boosted proposer root in fork choice")
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}
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// Return if it's not a new epoch.
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if !slots.IsEpochStart(slot) {
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return nil
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}
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// Update store.justified_checkpoint if a better checkpoint on the store.finalized_checkpoint chain
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bj := s.store.BestJustifiedCheckpt()
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if bj == nil {
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return errNilBestJustifiedInStore
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}
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j := s.store.JustifiedCheckpt()
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if j == nil {
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return errNilJustifiedInStore
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}
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f := s.store.FinalizedCheckpt()
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if f == nil {
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return errNilFinalizedInStore
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}
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if bj.Epoch > j.Epoch {
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finalizedSlot, err := slots.EpochStart(f.Epoch)
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if err != nil {
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return err
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}
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r, err := s.ancestor(ctx, bj.Root, finalizedSlot)
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if err != nil {
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return err
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}
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if bytes.Equal(r, f.Root) {
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s.store.SetJustifiedCheckpt(bj)
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}
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}
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return nil
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}
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