How to COMPLETELY repay borrowed asset on Cross Margin acc using sideEffectType=AUTO_REPAY?

API Spot/Margin API
1

Hello,

I will appreciate help regarding the problem I have with this endpoint on Margin account:
POST /sapi/v1/margin/order

The issue is that POST will not completely repay all borrowed+interest asset in spite of positive netAsset balance. Example:

STATUS before POST

"asset": "AVAX",
"free": "0.03518132",
"locked": "0",
"borrowed": "2.67772132",
"interest": "0.00004144",
"netAsset": "-2.64258144"

POST (/sapi/v1/margin/order) symbol=AVAXUSDT&side=BUY&type=MARKET&quantity=2.65&sideEffectType=AUTO_REPAY&timestamp=1715052885689 (notice AUTO REPAY!!!)

RESPONSE PAYLOAD

"symbol": "AVAXUSDT",
"orderId": XXX,
"clientOrderId": "XXX",
"transactTime": 1715052885880,
"price": "0",
"origQty": "2.65",
"executedQty": "2.65",
"cummulativeQuoteQty": "97.361",
"status": "FILLED",
"timeInForce": "GTC",
"type": "MARKET",
"side": "BUY",
"fills": [
    {
        "price": "36.74",
        "qty": "2.65",
        "commission": "0.00265",
        "commissionAsset": "AVAX",
        "tradeId": XXX
    }
],
"isIsolated": false,
"selfTradePreventionMode": "EXPIRE_MAKER"

STATUS PAYLOAD (there is(was) enough of free AVAX to repay * but it was not repaid completely !!!)

"asset": "AVAX",
"free": "0.03518132",
"locked": "0",
"borrowed": "0.03041276",
"interest": "0",
"netAsset": "0.00476856"

POST to /sapi/v1/margin/borrow-repay after that, specifying the amount to be repaid (borrowed + insterest), will repay all debts as it is supposed to.

Question is does sideEffectType=AUTO_REPAY work as intended or am I feeding it with the wrong data? I have calculated the amount I need to buy (borrowed+interest+fee and lot size filter). In the example above that is 2.65.

Fall back to simple 2 stage BUY + REPAY seems more convenient.

JFTR, I am trying all this on sub account.

Cheers!

2

(buy amount - comission) - (borrow + interest) = balance
(2.65 - 0.00265) - (2.67772132 + 0.00004144) = -0.03041276 debit balance

you have to pay (borrow + interest + comission) to settle the account, in this case

comission = (2.67772132 + 0.00004144) * 0.001 = 0.00267776276
total to pay = 2.67772132 + 0.00004144 + 0.00267776276 = 2.68044052276

if your lotsize is 0.01 you would have to round the number up having to buy 2.69usdt to settle your account

3

Thank you Saratoga, much appreciated!

In my first attempt the calculation was how much base asset I have to buy to have enough to repay the debt based on “netAsset” and “free” asset on the account. I guess “free” asset on cross margin account does not matter when it comes to AUTO REPAY.