CryptoBot/api/kraken.py

from pykrakenapi import KrakenAPI
import pandas, krakenex, time, numpy

class Kraken:
    def __init__(self):
        self.kraken_api = krakenex.API()
        self.kraken_api.load_key("kraken.key")
        self.kraken_wrapper = KrakenAPI(self.kraken_api)
        self.get_balances()

        
    # Updates the current wallet prices from the internet
    def get_balances(self):
        self.balances = self.kraken_wrapper.get_account_balance()

    
    # Gets a table of the price history of the pair since time at intervals of interval minutes
    def get_ohlc_prices(self, pair, time=round(time.time())-(30*24*3600), interval=60):
        self.prices = self.kraken_wrapper.get_ohlc_data(pair, interval=interval, since=time)[0].close.iloc[::-1]

    
    # Gets the current trading price of the currency pair
    def get_current_price(self, pair):
        current_price = numpy.float64(self.kraken_wrapper.get_ticker_information(pair)["c"][0][0])
        new_row = pandas.DataFrame([[current_price]], index=[pandas.to_datetime(time.time(), unit = "s")])

        self.prices = pandas.concat([self.prices, pandas.DataFrame(new_row)], ignore_index=False)

    def get_fee(self, pair):
        self.fee = self.kraken_wrapper.get_tradable_asset_pairs(pair=pair)["fees"][0][0][1]
    
    # Calculates the exponential moving average by grabbing data from Kraken on the conversion rate every interval minutes.
    def calculate_ema(self, short_time=5, long_time=30):
        self.long_ema = self.prices.ewm(span=long_time).mean()
        self.short_ema = self.prices.ewm(span=short_time).mean()

    
    # Buys crypto
    def buy_order(self, pair, currency_buy, currency_sell, amount, order_type="market"):
        self.kraken_wrapper.add_standard_order(pair, "buy", order_type, volume=amount, validate=True)
        #self.balances["vol"][currency_buy] += amount 
        #self.balances["vol"][currency_sell] -= amount * self.prices.tail(1)[0]
        time.sleep(1)
        self.get_balances()

    # Sells crypto
    def sell_order(self, pair, currency_buy, currency_sell, amount, order_type="market"):
        self.kraken_wrapper.add_standard_order(pair, "sell", order_type, volume=amount, validate=True)
        #self.balances["vol"][currency_buy] -= amount 
        #self.balances["vol"][currency_sell] += amount * self.prices.tail(1)[0]
        time.sleep(1)
        self.get_balances()