pluto/handler/money.py

# Twisted/Klein imports
from twisted.logger import Logger

# Other library imports
from pycoingecko import CoinGeckoAPI
from forex_python.converter import CurrencyRates

# Project imports
from settings import settings


class Money(object):
    """
    Generic class for handling money-related matters that aren't Revolut or Agora.
    """

    def __init__(self):
        """
        Initialise the Money object.
        Set the logger.
        Initialise the CoinGecko API.
        """
        self.log = Logger("money")
        self.cr = CurrencyRates()
        self.cg = CoinGeckoAPI()

    def lookup_rates(self, ads, rates=None):
        """
        Lookup the rates for a list of public ads.
        """
        if not rates:
            rates = self.cg.get_price(ids=["monero", "bitcoin"], vs_currencies=self.markets.get_all_currencies())
            # Set the price based on the asset
        for ad in ads:
            if ad[4] == "XMR":
                coin = "monero"
            elif ad[4] == "BTC":
                coin = "bitcoin"  # No s here
            currency = ad[5]
            base_currency_price = rates[coin][currency.lower()]
            price = float(ad[2])
            rate = round(price / base_currency_price, 2)
            ad.append(rate)
        return sorted(ads, key=lambda x: x[2])

    def get_rates_all(self):
        """
        Get all rates that pair with USD.
        :return: dictionary of USD/XXX rates
        :rtype: dict
        """
        rates = self.cr.get_rates("USD")
        return rates

    def get_acceptable_margins(self, currency, amount):
        """
        Get the minimum and maximum amounts we would accept a trade for.
        :param currency: currency code
        :param amount: amount
        :return: (min, max)
        :rtype: tuple
        """
        rates = self.get_rates_all()
        if currency == "USD":
            min_amount = amount - float(settings.Agora.AcceptableUSDMargin)
            max_amount = amount + float(settings.Agora.AcceptableUSDMargin)
            return (min_amount, max_amount)
        amount_usd = amount / rates[currency]
        min_usd = amount_usd - float(settings.Agora.AcceptableUSDMargin)
        max_usd = amount_usd + float(settings.Agora.AcceptableUSDMargin)
        min_local = min_usd * rates[currency]
        max_local = max_usd * rates[currency]
        return (min_local, max_local)

    def to_usd(self, amount, currency):
        if currency == "USD":
            return float(amount)
        else:
            rates = self.get_rates_all()
            return float(amount) / rates[currency]