Your user operation’s signature is invalid due to a timestamp mismatch. This occurs when:

  • The current block.timestamp is later than the validUntil time
  • The current block.timestamp is earlier than the validAfter time

These time constraints are derived from the validationData (a bytes32 field) returned by the smart account’s validateUserOp function.

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Resolution Strategies

  1. For Time-Sensitive Operations:

    • Double-check your validAfter and validUntil settings
    • Ensure your operation is submitted within the specified timeframe

  2. For Standard Operations:

    • Set both validAfter and validUntil to 0

Pro Tip: For non-time-sensitive operations without aggregators, simplify your validateUserOp function:

  • Return uint(0) for valid signatures
  • Return uint(1) for invalid signatures