Get Beneficiary from UserOp - AA90 & AA91

[kanthgithub]

Background

AA-90: rervert error when handleOps has beneficiary Address as Zero Address
AA-91: failure to Compensate the caller's beneficiary address with the collected fees of all UserOperations.

in Case-1 for AA-90 beneficiary address can be presumed as zero
but for AA-91 we need to extract beneficiary address to which collected fees is to be sent (and failed in this scenario)

Question

1. How to get beneficiary when we have UserOp?

we need to enhance decodeUserOp functiob to get the beneficiary address and populate in the UserOps Object

[kanthgithub]

Added beneficiary property to the userOp Struct
as all handleOps function call would definitely have beneficiary and 0th param in params passed to decoder is an userOp and it is expected to have beneficiary

change is pushed in to the commit:
50a828e

@tomarsachin2271

[kanthgithub]

will add these to current working PR itself (#40)

[kanthgithub]

@tomarsachin2271 added AA90 & AA91 Decoders.
for AA91 which happens when the entrypoint fails to compensate the beneficiary with collected fees
but error message doesn't include the amount or collected fees

added an issue in eth-infinitism repo, to propose if the error message can be encoded with amount or collected fees`
eth-infinitism/account-abstraction#409