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Add get_pendings_shard_blocks

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Hsiao-Wei Wang 2020-06-04 20:31:54 +08:00
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specs/phase1/shard-fork-choice.md
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@ -16,6 +16,7 @@
- [`get_shard_latest_attesting_balance`](#get_shard_latest_attesting_balance)
- [`get_shard_head`](#get_shard_head)
- [`get_shard_ancestor`](#get_shard_ancestor)
- [`get_pendings_shard_blocks`](#get_pendings_shard_blocks)
- [Handlers](#handlers)
- [`on_shard_block`](#on_shard_block)
@ -108,6 +109,31 @@ def get_shard_ancestor(store: Store, shard_store: ShardStore, root: Root, slot:
return root
```
#### `get_pendings_shard_blocks`
```python
def get_pendings_shard_blocks(store: Store, shard_store: ShardStore) -> Sequence[ShardBlock]:
"""
Return the shard blocks branch that from shard head to beacon head.
"""
shard = shard_store.shard
beacon_head_root = get_head(store)
beacon_head_state = store.block_states[beacon_head_root]
latest_shard_block_root = beacon_head_state.shard_states[shard].latest_block_root
shard_head_root = get_shard_head(store, shard_store)
root = shard_head_root
shard_blocks = []
while root != latest_shard_block_root:
shard_block = shard_store.blocks[root]
shard_blocks.append(shard_block)
root = shard_block.shard_parent_root
shard_blocks.reverse()
return shard_blocks
```
### Handlers
#### `on_shard_block`