simplest marketmaking demo

from time import sleep
from sys import exit
import time
import datetime
import math
import swivel-py

def truncate(number, digits) -> float:
    stepper = 10.0 ** digits
    return math.trunc(stepper * number) / stepper

def fetchPrice(underlying, maturity) -> float:
    url = "https://api-dev.swivel.exchange/v2/fills?underlying=" + underlying + "&maturity=" + maturity + "&depth=" + "1"
    response = requests.get(url= url)
    r = response.json()
    price = r[0]['price'] 
    return price

def limitOrder(underlying, maturity, exit, vault, price, amount, expiry):

    signedOrder = swivel.vendor....
    url = "x"
    params = "y"
    r = requests.post(url = url, params = y data = signedOrder)

def simplestMarketMake(underlying, maturity, range, amount, expiryLength):

    price = fetchPrice(underlying, maturity)
    upperBound = price + (price*(range/100))
    lowerBound = price - (price*(range/100))

    safeAmount = amount * .95
    
    lowerAmount = truncate((safeAmount / 2), 4)
    upperAmount = truncate((safeAmount / 2), 4)

    expiry = datetime.datetime.now() + expiryLength 
    #what unit is this in again

    limitOrder(underlying, maturity, true, false, lowerBound, lowerAmount, expiry)
    limitOrder(underlying, maturity, true, true, upperBound, upperAmount, expiry)


underlying = input('what is the underlying token: ')
maturity = input('what is the market\'s maturity: ')
amount = input('how many zcTokens and nTokens do you want to use')
orderRange = input('how far from market price do you want to quote (in %): ')
expiryLength = input('how often should orders refresh: ')
PRIVATE_KEY = input('what is your private key') #or env
PROVIDER_KEY = input('what is your Infura or other provider key: ')



swivel = swivel-py(PRIVATE_KEY, PROVIDER_KEY)
loop = true
while loop = true:

    simplestMarketMake(underlying, maturity, orderRange, amount, expiryLength)
    time.sleep(expiryLength)