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AA23 reverted (or OOG)

AA23 reverted (or OOG) is an ERC-4337 EntryPoint error that means the smart account's validateUserOp function reverted or ran out of gas while validating the user operation.

The validateUserOp function of the smart account either reverted or ran out of gas.

Possible solutions

  • Verify that the verificationGasLimit is high enough to cover the validateUserOp function's gas costs.
  • Verify that the validateUserOp function is implemented with the correct logic, and that the user operation is supposed to be valid.
  • Make sure the signature verification logic of the smart account is implemented correctly. Namely, correct implementations should not revert when the signature is invalid. If you are not looking to use neither time-based signatures nor a signature aggregator, you should simply return uint(1) for invalid signatures in the validateUserOp function.
  • If all else fails, investigate why the validateUserOp function reverted using tools like Tenderly.
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