def from_genesis(
cls,
base_db: AtomicDatabaseAPI,
genesis_state: BeaconState,
genesis_block: BaseBeaconBlock,
genesis_config: Eth2GenesisConfig,
) -> "BaseBeaconChain":
"""
Initialize the ``BeaconChain`` from a genesis state and block.
"""
sm_class = cls.get_state_machine_class_for_block_slot(
genesis_block.slot)
if type(genesis_block) != sm_class.block_class:
raise BlockClassError(
"Given genesis block class: {}, StateMachine.block_class: {}".
format(type(genesis_block), sm_class.block_class))
chaindb = cls.get_chaindb_class()(db=base_db,
genesis_config=genesis_config)
chaindb.persist_state(genesis_state)
genesis_scoring_class = sm_class.get_fork_choice_scoring_class()
genesis_score_class = genesis_scoring_class.get_score_class()
genesis_score = genesis_score_class.from_genesis(
genesis_state, genesis_block)
genesis_scoring = ConstantScoring(genesis_score)
chaindb.persist_block(genesis_block, genesis_block.__class__,
genesis_scoring)
return cls(base_db, genesis_config)
def from_genesis(cls, base_db: BaseAtomicDB, genesis_state: BeaconState,
genesis_block: BaseBeaconBlock) -> 'BaseBeaconChain':
"""
Initialize the ``BeaconChain`` from a genesis state.
"""
sm_class = cls.get_state_machine_class_for_block_slot(
genesis_block.slot)
if type(genesis_block) != sm_class.block_class:
raise BlockClassError(
"Given genesis block class: {}, StateMachine.block_class: {}".
format(type(genesis_block), sm_class.block_class))
chaindb = cls.get_chaindb_class()(db=base_db)
chaindb.persist_state(genesis_state)
return cls._from_genesis_block(base_db, genesis_block)
def from_genesis(
cls,
base_db: AtomicDatabaseAPI,
genesis_state: BeaconState,
genesis_block: BaseBeaconBlock,
genesis_config: Eth2GenesisConfig,
) -> "BaseBeaconChain":
"""
Initialize the ``BeaconChain`` from a genesis state.
"""
sm_class = cls.get_state_machine_class_for_block_slot(
genesis_block.slot)
if type(genesis_block) != sm_class.block_class:
raise BlockClassError(
"Given genesis block class: {}, StateMachine.block_class: {}".
format(type(genesis_block), sm_class.block_class))
chaindb = cls.get_chaindb_class()(db=base_db,
genesis_config=genesis_config)
chaindb.persist_state(genesis_state)
attestation_pool = AttestationPool()
return cls._from_genesis_block(base_db, attestation_pool,
genesis_block, genesis_config)