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@ -1125,8 +1125,7 @@ A valid block with slot `INITIAL_SLOT_NUMBER` (a "genesis block") has the follow
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`STARTUP_STATE_ROOT` (in the above "genesis block") is generated from the `get_initial_beacon_state` function below. When enough full deposits have been made to the deposit contract and the `ChainStart` log has been emitted, `get_initial_beacon_state` will execute to compute the `hash_tree_root` of `BeaconState`.
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```python
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def get_initial_beacon_state(initial_validator_registry: List[ValidatorRecord],
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initial_validator_deposits: List[Deposit],
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def get_initial_beacon_state(initial_validator_deposits: List[Deposit],
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genesis_time: int,
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processed_pow_receipt_root: Hash32) -> BeaconState:
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state = BeaconState(
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@ -1184,7 +1183,7 @@ def get_initial_beacon_state(initial_validator_registry: List[ValidatorRecord],
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update_validator_status(state, validator_index, ACTIVE)
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# set initial committee shuffling
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initial_shuffling = get_new_shuffling(ZERO_HASH, initial_validator_registry, 0)
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initial_shuffling = get_new_shuffling(ZERO_HASH, state.validator_registry, 0)
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state.shard_committees_at_slots = initial_shuffling + initial_shuffling
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# set initial persistent shuffling
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@ -1196,7 +1195,7 @@ def get_initial_beacon_state(initial_validator_registry: List[ValidatorRecord],
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### Routine for processing deposits
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First, a helper function:
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First, two helper functions:
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```python
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def min_empty_validator_index(validators: List[ValidatorRecord], current_slot: int) -> int:
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@ -1206,6 +1205,31 @@ def min_empty_validator_index(validators: List[ValidatorRecord], current_slot: i
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return None
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```
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```python
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def validate_proof_of_possession(state: BeaconState,
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pubkey: int,
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proof_of_possession: bytes,
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withdrawal_credentials: Hash32,
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randao_commitment: Hash32) -> bool:
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proof_of_possession_data = DepositInput(
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pubkey=pubkey,
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withdrawal_credentials=withdrawal_credentials,
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randao_commitment=randao_commitment,
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proof_of_possession=EMPTY_SIGNATURE,
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)
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return bls_verify(
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pubkey=pubkey,
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message=hash_tree_root(proof_of_possession_data),
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signature=proof_of_possession,
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domain=get_domain(
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state.fork_data,
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state.slot,
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DOMAIN_DEPOSIT,
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)
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)
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```
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Now, to add a [validator](#dfn-validator) or top up an existing [validator](#dfn-validator)'s balance by some `deposit` amount:
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```python
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@ -1219,23 +1243,15 @@ def process_deposit(state: BeaconState,
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Process a deposit from Ethereum 1.0.
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Note that this function mutates ``state``.
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"""
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deposit_input = DepositInput(
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pubkey=pubkey,
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withdrawal_credentials=withdrawal_credentials,
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randao_commitment=randao_commitment,
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proof_of_possession=EMPTY_SIGNATURE,
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# Validate the given `proof_of_possession`
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assert validate_proof_of_possession(
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state,
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pubkey,
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proof_of_possession,
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withdrawal_credentials,
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randao_commitment,
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)
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assert bls_verify(
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pubkey=pubkey,
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message=hash_tree_root(deposit_input),
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signature=proof_of_possession,
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domain=get_domain(
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state.fork_data,
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state.slot,
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DOMAIN_DEPOSIT
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)
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)
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validator_pubkeys = [v.pubkey for v in state.validator_registry]
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if pubkey not in validator_pubkeys:
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