async def get_interested_coin_ids(self) -> List[bytes32]:
    cursor = (await self.db_connection.execute('SELECT coin_name FROM interested_coins'))
    rows_hex = (await cursor.fetchall())
    return [bytes32(bytes.fromhex(row[0])) for row in rows_hex]
async def get_interested_coin_ids(self) -> List[bytes32]:
    cursor = (await self.db_connection.execute('SELECT coin_name FROM interested_coins'))
    rows_hex = (await cursor.fetchall())
    return [bytes32(bytes.fromhex(row[0])) for row in rows_hex]