Can buy but can not sell

[woafrnraetns]

Hi,

I’m encountering an issue when using the py-clob-client API with my OKX proxy (I also tried OKX EOA, and the issue persists). I can always buy, but I’m unable to sell my full position (never success).

For example, if I buy 5 shares of “Up” in the BTC15min market, I can only sell 4.5 shares. Attempting to sell all 5 results in this error:

PolyApiException: PolyApiException[status_code=400, error_message={'error': 'not enough balance / allowance'}]

After selling 4.5 shares via the API, I try to sell the remaining 0.5 and get:

PolyApiException: PolyApiException[status_code=400, error_message={'error': 'order 0x519a99d696ba78bd71eff1ac6190ebfd52f27473adb273f17cfbe74f2dbf1a26 is invalid. Size (0.1) lower than the minimum: 5'}]

Despite these issues with the API, I’m always able to sell the full position manually using the Polymarket website in the OKX app.

I have confirmed that both my balance and allowance are sufficient:

client.get_balance_allowance(params=BalanceAllowanceParams(asset_type=AssetType.COLLATERAL))

Returns:

{'balance': '100866980', 'allowances': {'0x4bFb41d5B3570DeFd03C39a9A4D8dE6Bd8B8982E': '115792089237316195423570985008687907853269984665640564039457584007913072382353', '0xC5d563A36AE78145C45a50134d48A1215220f80a': '115792089237316195423570985008687907853269984665640564039457584007913129639935', '0xd91E80cF2E7be2e162c6513ceD06f1dD0dA35296': '115792089237316195423570985008687907853269984665640564039457584007913129639935'}}

Here’s how I place my sell order:

order_args = OrderArgs(
price=price,
size=order_size,
side=SELL,
token_id=token_id,
)
signed_order = client.create_order(order_args)
resp = client.post_order(signed_order, OrderType.GTC)

I’ve also tried using FAK and FOK order types, but neither worked.

This issue has been bothering me for a few days. I’ve asked a few friends, but none of them have experienced this. I’d really appreciate your help in figuring this out.

Many thanks

[woafrnraetns]

Here is how I retrieve my position:

trades = client.get_trades(TradeParams(market=condition_id))
position = sum(
float(t.get("size", 0)) if t.get("side") == "BUY" else -float(t.get("size", 0))
for t in trades if t.get("asset_id") == token_id
)

[suhailkakar]

hey - there is a couple issue here but the main one is you're checking collateral (usdc) balance but sell orders actually check your conditional token balance on the server side. try using AssetType.CONDITIONAL with the token_id instead and see what that shows. lmk what you get back