Calling exactInputSingle returns execution reverted: STF

[syaringan357]

w3 = Web3(Web3.HTTPProvider(eth_local_http))
router_contract = w3.eth.contract(address=ROUTER_ADDRESS, abi=ROUTER_ABI)
DAI = "0x6B175474E89094C44Da98b954EedeAC495271d0F"
WETH9 = "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"
payload = (
    WETH9,    # tokenIn
    DAI,    # tokenOut
    3000,   # fee
    ACCOUNT_ADDRESS1,   # recipient
    round(time.time()) + 60 * 20,   # deadline
    int(Web3.toWei(0.01, "ether")),    # amountIn
    0,  # amountOutMinimum
    0,  # sqrtPriceLimitX96
)
tx = router_contract.functions.exactInputSingle(payload).buildTransaction()
print(tx)

It always returns

Traceback (most recent call last):
  File "/home/wpzhou/projects/moon_eth_v3/nets.py", line 607, in <module>
    tx = router_contract.functions.exactInputSingle(payload).buildTransaction()
  File "/home/wpzhou/projects/moon_eth_v3/venv/lib/python3.9/site-packages/web3/contract.py", line 1079, in buildTransaction
    return build_transaction_for_function(
  File "/home/wpzhou/projects/moon_eth_v3/venv/lib/python3.9/site-packages/web3/contract.py", line 1648, 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 "/home/wpzhou/projects/moon_eth_v3/venv/lib/python3.9/site-packages/web3/_utils/transactions.py", line 121, in fill_transaction_defaults
    default_val = default_getter(web3, transaction)
  File "/home/wpzhou/projects/moon_eth_v3/venv/lib/python3.9/site-packages/web3/_utils/transactions.py", line 67, in <lambda>
    'gas': lambda web3, tx: web3.eth.estimate_gas(tx),
  File "/home/wpzhou/projects/moon_eth_v3/venv/lib/python3.9/site-packages/web3/eth.py", line 759, in estimate_gas
    return self._estimate_gas(transaction, block_identifier)
  File "/home/wpzhou/projects/moon_eth_v3/venv/lib/python3.9/site-packages/web3/module.py", line 57, in caller
    result = w3.manager.request_blocking(method_str,
  File "/home/wpzhou/projects/moon_eth_v3/venv/lib/python3.9/site-packages/web3/manager.py", line 198, in request_blocking
    return self.formatted_response(response,
  File "/home/wpzhou/projects/moon_eth_v3/venv/lib/python3.9/site-packages/web3/manager.py", line 170, in formatted_response
    apply_error_formatters(error_formatters, response)
  File "/home/wpzhou/projects/moon_eth_v3/venv/lib/python3.9/site-packages/web3/manager.py", line 70, 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 "/home/wpzhou/projects/moon_eth_v3/venv/lib/python3.9/site-packages/web3/_utils/method_formatters.py", line 576, in raise_solidity_error_on_revert
    raise ContractLogicError(response['error']['message'])
web3.exceptions.ContractLogicError: execution reverted: STF

[Yhhhuu5potyo]

M

[Yhhhuu5potyo]

No

[Yhhhuu5potyo]

U

[Yhhhuu5potyo]

H

[AlexField26]

I had the same issue and the problem was, that i did not approve the token (maybe STF stands for SafeTransferFrom)

[gourprabh-tt]

I am facing the same problem and used the uniswap app to approve the tokens i wanted to trade. But i am still facing this error. Am i missing something?

[andreyLed]

Have the same issue. But it works for me 50/50. eg: topic author syaringan357 case works fine.

but my example with params = { tokenIn: '0x6b175474e89094c44da98b954eedeac495271d0f', tokenOut: '0xbbbbca6a901c926f240b89eacb641d8aec7aeafd', fee: 3000, amountIn: '10000000000000000000' } failed(( with Error: call revert exception

[sharozx16]

Same issue here, removed the STF error by approving my contract on the token address. Still getting the gas estimation error with call revert exception

[lorenzotinfena]

Same issue here, removed the STF error by approving my contract on the token address. Still getting the gas estimation error with call revert exception

Did you solve?

[shanzson]

Maybe that pool is not initialized.

[phgoff]

I just got this issue. So it was approved the wrong router instead of SwapRouter02.

[JackGod001]

Which is the right routing address, can you tell me your success code?

[shaochila]

STF 的意思是 safeTransferFrom,如果出现Fail with error 'STF'，需要授权代币给合约 STF means safeTransferFrom, if Fail with error 'STF' occurs, you need to approve tokens to the contract

[0xbrain]

STF 的意思是 safeTransferFrom,如果出现Fail with error 'STF'，需要授权代币给合约 STF means safeTransferFrom, if Fail with error 'STF' occurs, you need to approve tokens to the contract

正解！ Final solution!