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fetchRates.py
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/
fetchRates.py
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import requests
import json
import sqlite3
import os
from config import *
import requests
import json
import sqlite3
import os
from config import *
# 1. fetch old price data if its there, else create an empty db
if not os.path.isfile(f"system.db"):
# create an empty db
conn = sqlite3.connect('system.db')
c = conn.cursor()
c.execute('''CREATE TABLE ratepairs
(id integer primary key, ratepair text, price real)''')
c.execute("INSERT INTO ratepairs(ratepair, price) VALUES ('BTCBTC', 1)")
c.execute("INSERT INTO ratepairs(ratepair, price) VALUES ('BTCUSD', -1)")
c.execute("INSERT INTO ratepairs(ratepair, price) VALUES ('BTCINR', -1)")
c.execute("INSERT INTO ratepairs(ratepair, price) VALUES ('USDINR', -1)")
c.execute("INSERT INTO ratepairs(ratepair, price) VALUES ('FLOUSD', -1)")
conn.commit()
conn.close()
# load old price data
# load older price data
conn = sqlite3.connect('system.db')
c = conn.cursor()
ratepairs = c.execute('select ratepair, price from ratepairs')
ratepairs = ratepairs.fetchall()
prices = {}
for ratepair in ratepairs:
ratepair = list(ratepair)
prices[ratepair[0]] = ratepair[1]
# 2. fetch new price data
# apilayer
response = requests.get(
f"http://apilayer.net/api/live?access_key={apilayerAccesskey}")
try:
price = response.json()
prices['USDINR'] = price['quotes']['USDINR']
except ValueError:
print('Json parse error')
# bitpay
response = requests.get('https://bitpay.com/api/rates')
try:
bitcoinRates = response.json()
for currency in bitcoinRates:
if currency['code'] == 'USD':
prices['BTCUSD'] = currency['rate']
elif currency['code'] == 'INR':
prices['BTCINR'] = currency['rate']
except ValueError:
# coindesk
response = requests.get('https://api.coindesk.com/v1/bpi/currentprice.json')
try:
price = response.json()
prices['BTCUSD'] = price['bpi']['USD']['rate']
except ValueError:
print('Json parse error')
# cryptocompare
response = requests.get('https://min-api.cryptocompare.com/data/histoday?fsym=FLO&tsym=USD&limit=1&aggregate=3&e=CCCAGG')
try:
price = response.json()
prices['FLOUSD'] = price['Data'][-1]['close']
except ValueError:
print('Json parse error')
# 3. update latest price data
print('\n\n')
print(prices)
conn = sqlite3.connect('system.db')
c = conn.cursor()
for pair in list(prices.items()):
pair = list(pair)
c.execute(f"UPDATE ratepairs SET price={pair[1]} WHERE ratepair='{pair[0]}'")
conn.commit()