Error in code

[LudovicoPiccolo]

If i try to sell a crypto i see:

996341397394100562
0.996341397394100562
Enter the Contract Address of token you want to sell: 0x4d496efc21754481fe7a9f3f0f758785ade8e1d3

Balance: 9435079356.573655643061248581 SANINU

Enter amount of SANINU you want to sell: 700000

Approved: 0x59a9466c83ab9412cd96614de95937bf8572c3dc6b086c8043eda0e6ab597be9

Swapping 700000 SANINU for BNB

Traceback (most recent call last):
File "sell2.py", line 78, in
pancakeswap2_txn = contract.functions.swapExactTokensForETH(
File "/usr/local/lib/python3.8/dist-packages/web3/contract.py", line 1081, in buildTransaction
return build_transaction_for_function(
File "/usr/local/lib/python3.8/dist-packages/web3/contract.py", line 1650, in build_transaction_for_function
prepared_transaction = fill_transaction_defaults(web3, prepared_transaction)
File "cytoolz/functoolz.pyx", line 250, in cytoolz.functoolz.curry.call
File "/usr/local/lib/python3.8/dist-packages/web3/_utils/transactions.py", line 102, in fill_transaction_defaults
default_val = default_getter(web3, transaction)
File "/usr/local/lib/python3.8/dist-packages/web3/_utils/transactions.py", line 66, in
'gas': lambda web3, tx: web3.eth.estimate_gas(tx),
File "/usr/local/lib/python3.8/dist-packages/web3/eth.py", line 735, in estimate_gas
return self._estimate_gas(transaction, block_identifier)
File "/usr/local/lib/python3.8/dist-packages/web3/module.py", line 57, in caller
result = w3.manager.request_blocking(method_str,
File "/usr/local/lib/python3.8/dist-packages/web3/manager.py", line 187, in request_blocking
return self.formatted_response(response,
File "/usr/local/lib/python3.8/dist-packages/web3/manager.py", line 167, in formatted_response
apply_error_formatters(error_formatters, response)
File "/usr/local/lib/python3.8/dist-packages/web3/manager.py", line 67, in apply_error_formatters
formatted_resp = pipe(response, error_formatters)
File "cytoolz/functoolz.pyx", line 667, in cytoolz.functoolz.pipe
File "cytoolz/functoolz.pyx", line 642, in cytoolz.functoolz.c_pipe
File "/usr/local/lib/python3.8/dist-packages/web3/_utils/method_formatters.py", line 569, in raise_solidity_error_on_revert
raise ContractLogicError(response['error']['message'])
web3.exceptions.ContractLogicError: execution reverted: Pancake: K

Can you help me or fix the code?

Thanks

[LudovicoPiccolo]

I have created a loop that decreases the amount until the transaction is successful:

def estimateGas( txn):
try:
gas = web3.eth.estimateGas({
"from": txn['from'],
"to": txn['to'],
"value": txn['value'],
"data": txn['data']})
gas = gas + (gas / 10) # Adding 1/10 from gas to gas!
except:
gas = False
return gas

while True:
pancakeswap2_txn = contract.functions.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmountok,
0,
# Set to 0 or specify min number of tokens - setting to 0 just buys X amount of token at its current price for whatever BNB specified
[tokenToBuy, spend],
my_wallet,
(int(time.time()) + transactionRevertTime)
).buildTransaction({
'from': my_wallet,
'gas': 400000,
'gasPrice': web3.toWei('5','gwei'),
'nonce': nonce,
})

if estimateGas(pancakeswap2_txn) == False:
    tokenAmountok=int((tokenAmountok*0.99));
else:
    pancakeswap2_txn.update({ 'gas' : int(estimateGas(pancakeswap2_txn))})
    break