Lesson 7: Error = Tx dropped without known replacement (test_can_pick_winner)

[brownandrew1390]

When running a test on test_can_pick_winner from my integration test script, I receive the following error:

=============================================== FAILURES ================================================ 
_________________________________________ test_can_pick_winner __________________________________________ 

    def test_can_pick_winner():
        if network.show_active() in LOCAL_BLOCKCHAIN_ENVIRONMENTS:
            pytest.skip()
        lottery = deploy_lottery()
        account = get_account()
        lottery.startLottery({"from": account})
        lottery.enter({"from": account, "value": lottery.getEntranceFee()})
>       lottery.enter({"from": account, "value": lottery.getEntranceFee()})

tests\test_lottery_integration.py:14:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
..\..\..\..\.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\network\contract.py:1622: in __call__ 
    return self.transact(*args)
..\..\..\..\.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\network\contract.py:1495: in transact 
    return tx["from"].transfer(
..\..\..\..\.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\network\account.py:642: in transfer   
    receipt, exc = self._make_transaction(
..\..\..\..\.local\pipx\venvs\eth-brownie\lib\site-packages\brownie\network\account.py:758: in _make_transaction
    receipt = self._await_confirmation(receipt, required_confs, gas_strategy, gas_iter)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <LocalAccount '0x8458858CcF1F41D0442164fcedCf27aD3D6ab011'>
receipt = <Transaction '0x83fea55d345d1152b5005e7603d1e2419a9c1071520ea4757a51e3ec4aecba2d'>
required_confs = 1, gas_strategy = None, gas_iter = None

    def _await_confirmation(
        self,
        receipt: TransactionReceipt,
        required_confs: int,
        gas_strategy: Optional[GasABC],
        gas_iter: Optional[Iterator],
    ) -> TransactionReceipt:
        # add to TxHistory before waiting for confirmation, this way the tx
        # object is available if the user exits blocking via keyboard interrupt
        history._add_tx(receipt)

        if gas_strategy is not None:
            gas_strategy.run(receipt, gas_iter)  # type: ignore

        if required_confs == 0:
            # set 0-conf tx's as silent to hide the confirmation output
            receipt._silent = True
            return receipt

        try:
            receipt._confirmed.wait()
        except KeyboardInterrupt as exc:
            # set related transactions as silent
            receipt._silent = True
            for receipt in history.filter(
                sender=self, nonce=receipt.nonce, key=lambda k: k.status != -2
            ):
                receipt._silent = True
            raise exc.with_traceback(None)

        if receipt.status != -2:
            return receipt

        # if transaction was dropped (status -2), find and return the tx that confirmed
        replacements = history.filter(
            sender=self, nonce=receipt.nonce, key=lambda k: k.status != -2
        )
        while True:
            if not replacements:
>               raise TransactionError(f"Tx dropped without known replacement: {receipt.txid}")
E               brownie.exceptions.TransactionError: Tx dropped without known replacement: 0x83fea55d345d1152b5005e7603d1e2419a9c1071520ea4757a51e3ec4aecba2d

Here is my test_lottery_integration.py script:

import pytest
from scripts.deploy_lottery import deploy_lottery
from scripts.helpful_scripts import LOCAL_BLOCKCHAIN_ENVIRONMENTS, fund_with_link, get_account
import time
from brownie import network

def test_can_pick_winner():
    if network.show_active() in LOCAL_BLOCKCHAIN_ENVIRONMENTS:
        pytest.skip()
    lottery = deploy_lottery()
    account = get_account()
    lottery.startLottery({"from": account})
    lottery.enter({"from": account, "value": lottery.getEntranceFee()})
    lottery.enter({"from": account, "value": lottery.getEntranceFee()})
    fund_with_link(lottery)
    lottery.endLottery({"from": account})
    time.sleep(180)
    assert lottery.recentWinner() == account
    assert lottery.balance() == 0

[cromewar]

Hello @brownandrew1390 I tried to reproduce the error but I couldn't. which network are you using for the integration test?, also it seems to be a problem with your getEntranceFee() function, it should be something like this:

 function getEntranceFee() public view returns (uint256) {
        (, int256 price, , , ) = ethUsdPriceFeed.latestRoundData();
        // set entrance fee to $50
        // Eth/Usd conversion has 8 decimals so in order to make it 18 (wei standard) it's necessary to multiply the price.
        uint256 adjustedPrice = uint256(price) * (10**10); //18 decimals
        uint256 costToEnter = (usdEntryFee * 10**18) / adjustedPrice;
        return costToEnter;
    }

[brownandrew1390]

Actually I was able to run it again and no issues.... not really sure what happened but I did end up getting it to work.

[cromewar]

I also face this kind of problems time to time, and I should delete the build folder and compile again or just run the script again... I don't know yet why those things happen. Anyways I'm glad you solved your problem so I'm going to mark it as solved.

Best regards, Cromewar.

[koniq]

Same here, deleting build folder worked, thanks for the tip