AA23 reverted (or OOG)

The signature was rejected or it took too much gas to verify

The sender signature validation was rejected or ran out of gas. "OOG" is an abbreviation for Out-Of-Gas. The verificationGasLimit may be too low.

If you encounter an "AA23 reverted OOG" error, it means the sender does not have sufficient native tokens to cover the User Operation's gas costs. If you intended to use a Paymaster for sponsorship, ensure that the paymasterAndData field of the user operation is correctly set to enable proper handling of gas fees.