Why does the buy operation not change the account balance despite quote currency being available (after sell opertaion commenced first)? - trading

Question

if condition2 < condition1:
# Call the function to get the account balances
balances = get_balances()
quote_balance = balances['quote']
base1_balance = balances['base1']
base2_balance = balances['base2']
now = int(time.time() * 1000)
url_sell = 'https://api.kucoin.com/api/v1/orders'
# Generate a unique clientOid
client0id = str(uuid.uuid4())
# Calculate the size based on the baseIncrement and baseMinSize
baseMinSize = 0.1
baseIncrement = 0.0001
a = base1_balance
decimal_val = decimal.Decimal(str(a)).quantize(
decimal.Decimal('.000001'),
rounding=decimal.ROUND_DOWN
)
size_base1 = float(decimal_val)
data_sell = {
"clientOid": client0id,
"side": "sell",
"symbol": "BASE1-QUOTE",
"size": size_base1,
"type": "market",
"price": ""
}
str_to_sign_sell = str(now) + 'POST' + '/api/v1/orders' + json.dumps(data_sell)
signature_sell = base64.b64encode(
hmac.new(api_secret.encode('utf-8'), str_to_sign_sell.encode('utf-8'), hashlib.sha256).digest())
passphrase_sell = base64.b64encode(
hmac.new(api_secret.encode('utf-8'), api_passphrase.encode('utf-8'), hashlib.sha256).digest())
headers_sell = {
"Content-Type": "application/json",
"KC-API-SIGN": signature_sell,
"KC-API-TIMESTAMP": str(now),
"KC-API-KEY": api_key,
"KC-API-PASSPHRASE": passphrase_sell,
"KC-API-KEY-VERSION": "2"
}
response_sell = requests.request('post', url_sell, headers=headers_sell, data=json.dumps(data_sell))
print(response_sell.status_code)
# wait 10 seconds before looping again
while True:
time.sleep(10)
break
# Call the function to get the account balances
balances = get_balances()
now = int(time.time() * 1000)
url_buy = 'https://api.kucoin.com/api/v1/orders'
# Generate a unique clientOid
client0id = str(uuid.uuid4())
# Calculate the funds based on the quoteIncrement and quoteMinSize
quoteMinSize = 0.1
quoteIncrement = 1
a = quote_balance
decimal_val = decimal.Decimal(str(a)).quantize(
decimal.Decimal('.1'),
rounding=decimal.ROUND_DOWN
)
funds_quote = float(decimal_val)
data_buy = {
"clientOid": client0id,
"side": "buy",
"symbol": "BASE2-QUOTE",
"funds": funds_quote,
"type": "market",
"price": ""
}
str_to_sign_buy = str(now) + 'POST' + '/api/v1/orders' + json.dumps(data_buy)
signature_buy = base64.b64encode(
hmac.new(api_secret.encode('utf-8'), str_to_sign_buy.encode('utf-8'), hashlib.sha256).digest())
passphrase_buy = base64.b64encode(
hmac.new(api_secret.encode('utf-8'), api_passphrase.encode('utf-8'), hashlib.sha256).digest())
headers_buy = {
"Content-Type": "application/json",
"KC-API-SIGN": signature_buy,
"KC-API-TIMESTAMP": str(now),
"KC-API-KEY": api_key,
"KC-API-PASSPHRASE": passphrase_buy,
"KC-API-KEY-VERSION": "2"
}
response_buy = requests.request('post', url_buy, headers=headers_buy, data=json.dumps(data_buy))
print(response_buy.status_code)
I'm having a strange problem with the fragment of code that i pasted here. It's a trading bot that's supposed to sell and buy given assets if certain conditions are met. All the rest of my code works as intended. The problem most likely lies somewhere within this fragment.
there are two base currencies and one quote currency
PROBLEM:
1st scenario:
base1 currency available --> sell proceed returns 200 --> balance reflects change in assets size --> quote currency available --> buy proceed returns 200 --> no change in balance of base2 currency
2nd scenario:
base1 currency unavailable --> sell proceed returns 200 --> obviously no change in asset size --> quote currency available --> buy proceed returns 200 --> filled with balances of base2 currency appropriately changed
what I want:
base1 currency unavailable/available --> sell proceed returns 200 --> filled with balances appropriatlely changed --> quote currency available --> buy proceed returns 200 --> filled with balances of base2 currency appropriately changed
The best way to describe the issue would be to give an example:
1st scenario:
1500 units of base1 currency
0 units of base2 currency
0 units of quote currency
*selling returns code 200 --> balance checked again --> balance changed *
now I have (let's say):
0 units of base1 currency
0 units of base2 currency
3500 units of quote currency
buying returns code 200 --> balance checked again --> balance not changed
finally I have (here's the problem) still:
0 units of base1 currency
0 units of base2 currency
3500 units of quote currency
2nd scenario:
0 units of base1 currency
0 units of base2 currency
3500 units of quote currency
selling returns code 200 --> balance checked again --> balance (obviously) not changed
now I have (let's say):
0 units of base1 currency
0 units of base2 currency
3500 units of quote currency
buying returns code 200 --> balance checked again --> balance changed
finally I have:
0 units of base1 currency
1500 units of base2 currency
0 units of quote currency
In other words:
if there is not enough base currency to make a sell operation then sell proceeds and then the buy operation proceeds with the account balance changing appropriately
while
if there is enough base currency to make a sell operation then sell proceeds and then the buy operation also proceeds but the account balance doesn't change
What could be the underlying cause of this issue?
I tried:
making pause between sell and buy operation longer - no result
trying to check if sell order was filled but it doesn't matter as the balance check after sell operation (if base currency available) shows that the sell operation did fill and quote currency is available for buying
indenting buying part of code more - no result
trying to change quote increment - no result