ritmex-bot/docs/ccxt/wiki/examples/py/margin-loan-borrow-buy-sell-repay.md

- [Margin Loan Borrow Buy Sell Repay](./examples/py/)


 ```python
 import os
import sys

# PLEASE DO NOT EDIT THIS FILE, IT IS GENERATED AND WILL BE OVERWRITTEN:
# https://github.com/ccxt/ccxt/blob/master/CONTRIBUTING.md#how-to-contribute-code

# AUTO-TRANSPILE #
# Note, this is just an example and might not yet work on other exchanges, which are being still unified.
async def example():
    # ########## user inputs ##########
    exchange = getattr(ccxt, 'binance')({
        'apiKey': 'xxx',
        'secret': 'xxx',
    })
    symbol = 'BUSD/USDT'  # set target symbol
    margin_mode = 'isolated'  # margin mode (cross or isolated)
    collateral_coin = 'USDT'  # which asset you want to use for margin-borrow collateral
    borrow_coin = 'BUSD'  # which coin to borrow
    order_side = 'sell'  # which side to trade
    amount_to_trade = 14  # how many coins to sell
    order_type = 'limit'  # order type (can be market, limit or etc)
    limit_price = 0.99  # price to sell at (set undefined/null/None if market-order)
    margin_magnitude = 5  # target margin (aka 'leverage'). This might also be obtainable using other unified methods, but for example purposes, we set here manually
    # ########## end of user-inputs ##########
    #
    # for example purposes, let's also check available balance at first
    balance_margin = await exchange.fetch_balance({
        'defaultType': 'margin',
        'marginMode': margin_mode,
    })  # use `defaultType` because of temporary bug, otherwise, after several days, you can use `type` too.
    # if we don't have enought coins, then we have to borrow at first
    needed_amount_to_borrow = None  # will be auto-set below
    if amount_to_trade > balance_margin[symbol][borrow_coin]['free']:
        needed_amount_to_borrow = amount_to_trade - balance_margin[symbol][borrow_coin]['free']
        print('hmm, I have only ', balance_margin[symbol][borrow_coin]['free'], ' ', borrow_coin, ' in margin balance, and still need additional ', needed_amount_to_borrow, ' to make an order. Lets borrow it.')
        # To initate a borrow, at first, check if we have enough collateral (for this example, as we make a sell-short, we need '-1' to keep for collateral currency)
        needed_collateral_amount = needed_amount_to_borrow / (margin_magnitude - 1)
        # Check if we have any collateral to get permission for borrow
        if balance_margin[symbol][collateral_coin]['free'] < needed_collateral_amount:
            # If we don't have enough collateral, then let's try to transfer collateral-asset from spot-balance to margin-balance
            print('hmm, I have only ', balance_margin[symbol][collateral_coin]['free'], ' in balance, but ', needed_collateral_amount, ' collateral is needed. I should transfer ', needed_collateral_amount, ' from spot')
            # let's check if we have spot balance at all
            balance_spot = await exchange.fetch_balance({
                'type': 'spot',
            })
            if exchange.parse_number(balance_spot[collateral_coin]['free']) < needed_collateral_amount:
                print('hmm, I neither do have enough balance on spot - only ', balance_spot[collateral_coin]['free'], '. Script can not continue...')
                return
            else:
                print('Transferring  ', needed_collateral_amount, ' to margin account')
                await exchange.transfer(collateral_coin, needed_collateral_amount, 'spot', margin_mode, {
                    'symbol': symbol,
                })
        # now, as we have enough margin collateral, initiate borrow
        print('Initiating margin borrow of ', needed_amount_to_borrow, ' ', borrow_coin)
        borrow_result = await exchange.borrow_margin(borrow_coin, needed_amount_to_borrow, symbol, {
            'marginMode': margin_mode,
        })
    print('Submitting order.')
    order = await exchange.create_order(symbol, order_type, order_side, amount_to_trade, limit_price, {
        'marginMode': margin_mode,
    })
    print('Order was submitted !', order['id'])
    #
    #
    # ...
    # ...
    # some time later, if you want to repay the loan back (like 'close the position')...
    # ...
    # ...
    #
    #
    # set the "repay-back" amount (for this example snippet, this will be same amount that we borrowed above)
    if needed_amount_to_borrow is not None:
        amount_to_repay_back = needed_amount_to_borrow
        # At first, you need to get back the borrowed coin, by making an opposide trade
        print('Making purchase back of ', amount_to_repay_back, ' ', borrow_coin, ' to repay it back.')
        purchase_back_price = 1.01
        order_back = await exchange.create_order(symbol, order_type, ('sell' if order_side == 'buy' else 'buy'), amount_to_repay_back, purchase_back_price, {
            'marginMode': margin_mode,
        })
        print('Now, repaying the loan.')
        repay_result = await exchange.repay_margin(borrow_coin, amount_to_repay_back, symbol, {
            'marginMode': margin_mode,
        })
        print('finished.')

    await exchange.close()


asyncio.run(example())
 
```