Monitor PEV prices in different pools

pev.py

import requests

PEV_CONTRACT_ADDRESS = 'TUJrRXdbkHbKEVT8sRs9xdfsaEWe1XHEMC'
PEARL_CONTRACT_ADDRESS = 'TJydMBnDJUYccpBPbLqn6oBxaiaCAhxcFd'
TAI_CONTRACT_ADDRESS = 'TSdDVvLdt3Vu9TqyEH5m273pJxbpJoqAwR'
SAN_CONTRACT_ADDRESS = 'TUU9vEMbEndY4VBm6C6T35EHByvkaMQypc'

TOKEN_SYMBOLS = ['USDT', 'PEARL', 'TAI', 'SAN']


def fetch_token_balances(symbols, address):
    API_URL = 'https://apilist.tronscan.io/api/account?address=%s' % address
    res = requests.get(API_URL)
    tokens = res.json()['trc20token_balances']
    return {t['symbol'].upper(): float(t['balance']) / (10 ** t['decimals'])
            for t in tokens if t['symbol'].upper() in symbols}


def get_token_price(symbol, address):
    data = fetch_token_balances(['USDT', symbol], address)
    return data['USDT'] / data[symbol]


if __name__ == '__main__':
    try:
        pev_data = fetch_token_balances(TOKEN_SYMBOLS, PEV_CONTRACT_ADDRESS)
        prices = {}

        sep = '=' * 10
        print('%s PEV price in different pools %s' % (sep, sep))

        price_in_usdt_pool = pev_data['USDT'] / 7500
        prices['USDT'] = price_in_usdt_pool
        print('USDT pool: 1 PEV = %.2f usdt' % price_in_usdt_pool)

        config = [
            ('PEARL', PEARL_CONTRACT_ADDRESS, 1500),
            ('TAI', TAI_CONTRACT_ADDRESS, 500),
            ('SAN', SAN_CONTRACT_ADDRESS, 500),
        ]
        for symbol, contract_address, share in config:
            price = get_token_price(symbol, contract_address)
            pev_price_in_pool = pev_data[symbol] * price / share
            prices[symbol] = pev_price_in_pool
            print('%s pool: 1 PEV = %.2f usdt. (%s Price: %.2f usdt)' % (
                symbol, pev_price_in_pool, symbol, price))

        print('=' * 50)
        sorted_prices = sorted(prices.items(), key=lambda x: x[1])
        print('The best choice is to buy from %s pool!' % sorted_prices[0][0])
        print('=' * 50)
    except KeyboardInterrupt:
        print('You killed it.')