eth2.0-specs/pysetup/spec_builders/bellatrix.py

from .base import BaseSpecBuilder
from ..constants import BELLATRIX

class BellatrixSpecBuilder(BaseSpecBuilder):
    fork: str = BELLATRIX

    @classmethod
    def imports(cls, preset_name: str):
        return f'''
from typing import Protocol
from eth2spec.altair import {preset_name} as altair
from eth2spec.utils.ssz.ssz_typing import Bytes8, Bytes20, ByteList, ByteVector
'''

    @classmethod
    def sundry_functions(cls) -> str:
        return """
ExecutionState = Any


def get_pow_block(hash: Bytes32) -> Optional[PowBlock]:
    return PowBlock(block_hash=hash, parent_hash=Bytes32(), total_difficulty=uint256(0))


def get_execution_state(_execution_state_root: Bytes32) -> ExecutionState:
    pass


def get_pow_chain_head() -> PowBlock:
    pass


def validator_is_connected(validator_index: ValidatorIndex) -> bool:
    # pylint: disable=unused-argument
    return True"""

    @classmethod
    def execution_engine_cls(cls) -> str:
        return """
class NoopExecutionEngine(ExecutionEngine):

    def notify_new_payload(self: ExecutionEngine, execution_payload: ExecutionPayload) -> bool:
        return True

    def notify_forkchoice_updated(self: ExecutionEngine,
                                  head_block_hash: Hash32,
                                  safe_block_hash: Hash32,
                                  finalized_block_hash: Hash32,
                                  payload_attributes: Optional[PayloadAttributes]) -> Optional[PayloadId]:
        pass

    def get_payload(self: ExecutionEngine, payload_id: PayloadId) -> GetPayloadResponse:
        # pylint: disable=unused-argument
        raise NotImplementedError("no default block production")

    def is_valid_block_hash(self: ExecutionEngine, execution_payload: ExecutionPayload) -> bool:
        return True

    def verify_and_notify_new_payload(self: ExecutionEngine,
                                      new_payload_request: NewPayloadRequest) -> bool:
        return True


EXECUTION_ENGINE = NoopExecutionEngine()"""


    @classmethod
    def hardcoded_custom_type_dep_constants(cls, spec_object) -> str:
        return {
            'MAX_BYTES_PER_TRANSACTION': spec_object.preset_vars['MAX_BYTES_PER_TRANSACTION'].value,
        }