code: def extcodehash(computation: BaseComputation) -> None:
      
      account = force_bytes_to_address(computation.stack_pop(type_hint=constants.BYTES))
      state = computation.state
  
      if state.account_is_empty(account):
          computation.stack_push(constants.NULL_BYTE)
      else:
          computation.stack_push(state.get_code_hash(account))
docs: Return the code hash for a given address.
      EIP: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1052.md