Check if the public_key of owner is in the condition details
    as an Ed25519Fulfillment.public_key

    Args:
        condition_details (dict): dict with condition details
        owner (str): base58 public key of owner

    Returns:
        bool: True if the public key is found in the condition details, False otherwise

def condition_details_has_owner(condition_details, owner):
    """Check if the public_key of owner is in the condition details
    as an Ed25519Fulfillment.public_key

    Args:
        condition_details (dict): dict with condition details
        owner (str): base58 public key of owner

    Returns:
        bool: True if the public key is found in the condition details, False otherwise

    """
    if 'subconditions' in condition_details:
        result = condition_details_has_owner(condition_details['subconditions'], owner)
        if result:
            return True

    elif isinstance(condition_details, list):
        for subcondition in condition_details:
            result = condition_details_has_owner(subcondition, owner)
            if result:
                return True
    else:
        if 'public_key' in condition_details \
                and owner == condition_details['public_key']:
            return True
    return False