The actual gas cost of the user operation exceeded the prefund provided by the smart account or paymaster.

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Resolution Checklist

  1. Gas Limit Adjustment:
    • Try increasing the verificationGasLimit for the user operation
  2. For Bundler Provider Users:
    • If using eth_estimateUserOperationGas (e.g., from JiffyLabs) and encountering this error, contact their support
  3. Advanced Analysis:
    • Investigate discrepancies between actual gas cost and prefund using tools like Tenderly