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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)
|
