From 09fd49ce89f07728a267bebc9bc3a63cc9428e94 Mon Sep 17 00:00:00 2001 From: Danny Ryan Date: Wed, 6 Nov 2019 17:20:21 -0700 Subject: [PATCH] use helper for slots since epoch start --- specs/core/0_fork-choice.md | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/specs/core/0_fork-choice.md b/specs/core/0_fork-choice.md index 9e38fd548..ac1de0b3d 100644 --- a/specs/core/0_fork-choice.md +++ b/specs/core/0_fork-choice.md @@ -96,11 +96,20 @@ def get_genesis_store(genesis_state: BeaconState) -> Store: ) ``` +#### `get_current_slot` + ```python def get_current_slot(store: Store) -> Slot: return Slot((store.time - store.genesis_time) // SECONDS_PER_SLOT) ``` +#### `compute_slots_since_epoch_start` + +```python +def compute_slots_since_epoch_start(slot: Slot) -> int: + return slot - compute_start_slot_at_epoch(compute_epoch_at_slot(slot)) +``` + #### `get_ancestor` ```python @@ -149,7 +158,7 @@ def get_head(store: Store) -> Hash: ```python def should_update_justified_checkpoint(store: Store, new_justified_checkpoint: Checkpoint) -> bool: - if get_current_slot(store) % SLOTS_PER_EPOCH < SAFE_SLOTS_TO_UPDATE_JUSTIFIED: + if compute_slots_since_epoch_start(get_current_slot(store)) < SAFE_SLOTS_TO_UPDATE_JUSTIFIED: return True new_justified_block = store.blocks[new_justified_checkpoint.root]