def METHOD_NAME(self):
    obj_attrs = []
    obj = MISPObject('coin-address')
    first_seen = self.get_first_seen()
    last_seen = self.get_last_seen()
    if first_seen:
        obj.first_seen = first_seen
    if last_seen:
        obj.last_seen = last_seen
    if not first_seen or not last_seen:
        self.logger.warning(
            f'Export error, None seen {self.type}:{self.subtype}:{self.id}, first={first_seen}, last={last_seen}')
    obj_attrs.append(obj.add_attribute('address', value=self.id))
    crypto_symbol = self.get_currency_symbol()
    if crypto_symbol:
        obj_attrs.append(obj.add_attribute('symbol', value=crypto_symbol))
    for obj_attr in obj_attrs:
        for tag in self.get_tags():
            obj_attr.add_tag(tag)
    return obj