import json


def is_blacklisted(address):
    """
    Checks if a particular address is known to be Fraudulent
    :param str address:     Address to check for in blacklist
    :return:                Boolean of whether the address is in the black list
    """
    with open('blacklist.json') as blacklist_f:
        blacklist = json.load(blacklist_f)
        for entry in blacklist:
            if entry['address'] == address:
                return True
    return False