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|
from typing import (
Union,
)
from eth_hash.abc import (
BackendAPI,
PreImageAPI,
)
from eth_hash.utils import (
auto_choose_backend,
)
class AutoBackend(BackendAPI):
def _initialize(self) -> None:
backend = auto_choose_backend()
# Use setattr to circumvent mypy's confusion, see:
# https://github.com/python/mypy/issues/2427
setattr(self, "keccak256", backend.keccak256) # noqa: B010
setattr(self, "preimage", backend.preimage) # noqa: B010
def keccak256(self, in_data: Union[bytearray, bytes]) -> bytes:
self._initialize()
return self.keccak256(in_data)
def preimage(self, in_data: Union[bytearray, bytes]) -> PreImageAPI:
self._initialize()
return self.preimage(in_data)
|
