format balance

    @ensure_authorized
    def _cb_get_balance(self, bot, update, args):
        LOGGER.info(f"{update.message.chat.username} : /getbalance {args}")
        chat_id = update.message.chat.id

        if not self.userdata[chat_id]['getbalance']:
            message = f"<pre> please set a list of currencies using /set </pre>"
            bot.send_message(chat_id, text=message, parse_mode='HTML')

        balances = self.btfx_client.balances()
        formated_balances = utils.format_balance(self.userdata[chat_id]['getbalance'], balances)
        message = f"<pre>{formated_balances}</pre>"
        bot.send_message(chat_id, text=message, parse_mode='HTML')


def format_balance(currencies, balances):
    # remove balance for currencies not in users list
    balances = [balance for balance in balances if balance['currency'] in currencies]
    # determine max width for each column
    width_eamt = max([len(bal['amount']) for bal in balances if bal['type'] == 'exchange'])
    width_eavl = max([len(bal['available']) for bal in balances if bal['type'] == 'exchange'])
    width_tamt = max([len(bal['amount']) for bal in balances if bal['type'] == 'trading'])
    width_tavl = max([len(bal['available']) for bal in balances if bal['type'] == 'trading'])
    width_damt = max([len(bal['amount']) for bal in balances if bal['type'] == 'deposit'])
    width_davl = max([len(bal['available']) for bal in balances if bal['type'] == 'deposit'])

    # initialize dictionary from which lines will be obtained
    bal_dict = {}
    for currency in currencies:
        bal_dict[currency] = {
            "exchange": {"amount": "0.0", "available": "0.0"},
            "trading": {"amount": "0.0", "available": "0.0"},
            "deposit": {"amount": "0.0", "available": "0.0"}
        }

    # update values with real values from balances
    for balance in balances:
        currency = balance['currency']
        ctype = balance['type']
        bal_dict[currency][ctype]["amount"] = balance["amount"]
        bal_dict[currency][ctype]["available"] = balance["available"]

    # build formated message
    lines = []
    width_exchange = width_eamt + width_eavl + 4
    width_trading = width_tamt + width_tavl + 5
    width_deposit = width_damt + width_davl + 4
    header_line = (
        "      "
        f"{'exchange':^{width_exchange}}"
        "||"
        f"{'margin':^{width_trading}}"
        "||"
        f"{'funding':^{width_deposit}}"
        "\n"
    )
    lines.append(header_line)
    for curr, val in bal_dict.items():
        eamt = Decimal(val['exchange']['amount'])
        eavl = Decimal(val['exchange']['available'])
        tamt = Decimal(val['trading']['amount'])
        tavl = Decimal(val['trading']['available'])
        damt = Decimal(val['deposit']['amount'])
        davl = Decimal(val['deposit']['available'])
        line = (
            f"{curr}   "
            f"{eamt:{width_eamt}} : {eavl:{width_eavl}} || "
            f"{tamt:{width_tamt}} : {tavl:{width_tavl}} || "
            f"{damt:{width_damt}} : {davl:{width_davl}}\n"
        )
        lines.append(line)

    balances_message = "".join(lines)
    return balances_message