Understanding gas calculations: How is paymasterVerificationGasLimit estimated?

[matthiasgeihs]

Hey, I'm trying to understand how gas estimations work. In particular, looking at paymasterVerificationGasLimit.

What I do understand: EntryPointSimulations.sol is used to simulate operations and thereby measure gas.

What I don't understand: The return type struct ExecutionResult of simulateHandleOP does not include paymasterVerificationGasLimit, however, the EntryPointV07SimulationsAbi does have this field in the return value of this function (see here).

How is that possible? And how is that value calculated on the contract side?

[mouseless0x]

Hey, I believe those contracts were out of date at the time, the contracts dir has since been deleted from Alto and moved to a seperate repo (entrypoint-estimations). The ExecutionResult struct does contain paymasterVerificationGasLimit, and this field is populated during simulation by calling the EntryPoint's _validatePrepayment method.

Let me know if you have any further questions:)