Chainlink Keeper未执行performUpkeep但checkUpkeep返回true问题求助

I get that it's frustrating when your Chainlink Keeper's performUpkeep function won't fire even though all the conditions from checkUpkeep are clearly met. You've already tried a few solid fixes, so let's walk through other potential causes and solutions to get this working:

Potential Issues & Troubleshooting Steps #

1. Double-Check Gas Limit Configuration #

Even though you spun up a new Upkeep with a higher gas limit, make sure the actual gas needed to run performUpkeep falls within that limit.

• Simulate a performUpkeep call in Remix to get the exact gas consumption, then set your Upkeep's gas limit to a value higher than that (add a buffer—chain gas prices can fluctuate unexpectedly).

2. Validate Keeper Node & Upkeep Basics #

Chainlink Keeper nodes have a few non-negotiable requirements to trigger upkeeps:

• Check Upkeep LINK Balance: If your Upkeep doesn't have enough LINK to cover gas fees and node rewards, the node will stop triggering it. Head to your Upkeep dashboard to confirm the balance is sufficient.
• Allow Time for Node Check Cycles: On Kovan testnet, Keeper nodes typically check upkeeps every few minutes to 10+ minutes. If your shouldHarvest condition just became true, give it some time before assuming it's broken.

3. Verify shouldHarvest Logic Against Real On-Chain State #

While Remix says checkUpkeep returns true, make sure the live on-chain state matches your simulation:

• Directly call the MasterChef contract's pendingBall method with your contract address and pool ID to confirm the pending amount is actually above harvestThreshold.
• Double-check your contract's paused() status on-chain—sometimes admin functions might toggle this setting without you noticing.

4. Re-Register Upkeep with Clean Parameters #

Even though your code doesn't use checkData, a malformed value during Upkeep registration could throw off the node's logic. Try re-registering the Upkeep with an empty checkData field to eliminate this possibility.

5. Add Event Logging to Debug Execution #

Add an event to your performUpkeep function to confirm if it's being called (and potentially failing silently):

event HarvestInitiated();

function performUpkeep(bytes calldata performData) external override {
    emit HarvestInitiated();
    harvest();
    // Silence unused variable warning
    performData;
}

You can then monitor Etherscan for this event—if it shows up, the problem is likely inside your harvest() function (e.g., internal logic causing a revert), not the Keeper trigger itself.

内容的提问来源于stack exchange，提问作者Moonster