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Hsiao-Wei Wang 2019-01-19 16:06:00 +08:00
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specs/core/0_beacon-chain.md
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@ -254,7 +254,7 @@ Unless otherwise indicated, code appearing in `this style` is to be interpreted
## Data structures ## Data structures
The following data structures are [SimpleSerialize (SSZ)](https://github.com/ethereum/eth2.0-specs/blob/master/specs/simple-serialize.md) objects. The following data structures are defined as [SimpleSerialize (SSZ)](https://github.com/ethereum/eth2.0-specs/blob/master/specs/simple-serialize.md) objects.
### Beacon chain operations ### Beacon chain operations
@ -801,7 +801,7 @@ Note: We aim to migrate to a S[T/N]ARK-friendly hash function in a future Ethere
#### `hash_tree_root` #### `hash_tree_root`
`hash_tree_root` is a function for hashing objects into a single root utilizing a hash tree structure. `hash_tree_root` is defined in the [SimpleSerialize spec](https://github.com/ethereum/eth2.0-specs/blob/master/specs/simple-serialize.md#tree-hash). `def hash_tree_root(object: SSZSerializable) -> Bytes32` is a function for hashing objects into a single root utilizing a hash tree structure. `hash_tree_root` is defined in the [SimpleSerialize spec](https://github.com/ethereum/eth2.0-specs/blob/master/specs/simple-serialize.md#tree-hash).
#### `is_active_validator` #### `is_active_validator`
```python ```python
@ -815,7 +815,7 @@ def is_active_validator(validator: Validator, slot: SlotNumber) -> bool:
#### `get_active_validator_indices` #### `get_active_validator_indices`
```python ```python
def get_active_validator_indices(validators: [Validator], slot: SlotNumber) -> List[ValidatorIndex]: def get_active_validator_indices(validators: List[Validator], slot: SlotNumber) -> List[ValidatorIndex]:
""" """
Gets indices of active validators from ``validators``. Gets indices of active validators from ``validators``.
""" """
@ -1568,7 +1568,7 @@ For each `deposit` in `block.body.deposits`:
* Verify that `verify_merkle_branch(hash(serialized_deposit_data), deposit.branch, DEPOSIT_CONTRACT_TREE_DEPTH, deposit.index, state.latest_eth1_data.deposit_root)` is `True`. * Verify that `verify_merkle_branch(hash(serialized_deposit_data), deposit.branch, DEPOSIT_CONTRACT_TREE_DEPTH, deposit.index, state.latest_eth1_data.deposit_root)` is `True`.
```python ```python
def verify_merkle_branch(leaf: Bytes32, branch: [Bytes32], depth: int, index: int, root: Bytes32) -> bool: def verify_merkle_branch(leaf: Bytes32, branch: List[Bytes32], depth: int, index: int, root: Bytes32) -> bool:
value = leaf value = leaf
for i in range(depth): for i in range(depth):
if index // (2**i) % 2: if index // (2**i) % 2: