Helper function for validating a value against the expected abi_type
    Note: abi_type 'bytes' must either be python3 'bytes' object or ''

def validate_abi_value(abi_type, value):
    """
    Helper function for validating a value against the expected abi_type
    Note: abi_type 'bytes' must either be python3 'bytes' object or ''
    """
    if is_array_type(abi_type) and is_list_like(value):
        # validate length
        specified_length = length_of_array_type(abi_type)
        if specified_length is not None:
            if specified_length < 1:
                raise TypeError(
                    "Invalid abi-type: {abi_type}. Length of fixed sized arrays"
                    "must be greater than 0."
                    .format(abi_type=abi_type)
                )
            if specified_length != len(value):
                raise TypeError(
                    "The following array length does not the length specified"
                    "by the abi-type, {abi_type}: {value}"
                    .format(abi_type=abi_type, value=value)
                )

        # validate sub_types
        sub_type = sub_type_of_array_type(abi_type)
        for v in value:
            validate_abi_value(sub_type, v)
        return
    elif is_bool_type(abi_type) and is_boolean(value):
        return
    elif is_uint_type(abi_type) and is_integer(value) and value >= 0:
        return
    elif is_int_type(abi_type) and is_integer(value):
        return
    elif is_address_type(abi_type):
        validate_address(value)
        return
    elif is_bytes_type(abi_type):
        if is_bytes(value):
            return
        elif is_string(value):
            if is_0x_prefixed(value):
                return
            else:
                raise TypeError(
                    "ABI values of abi-type 'bytes' must be either"
                    "a python3 'bytes' object or an '0x' prefixed string."
                )
    elif is_string_type(abi_type) and is_string(value):
        return

    raise TypeError(
        "The following abi value is not a '{abi_type}': {value}"
        .format(abi_type=abi_type, value=value)
    )