Discrepancies in PVG across bundlers causes UserOps to be rejected in the Mempool

[ch4r10t33r]

Although most bundlers adhere to the reference implementation for determining the Pre-Verification Gas (PVG) of a bundle (https://github.com/eth-infinitism/bundler/blob/main/packages/sdk/src/calcPreVerificationGas.ts), discrepancies still arise across different bundler implementations.

This variation in PVG leads to instances where UserOps deemed valid by one bundle are rejected by another.

For instance, a UserOp processed by Skandha yields a PVG of 44668, while 44848 estimates the same operation at 44848, resulting in the rejection of the UserOp from the mempool.

To mitigate this issue, it may be necessary to standardize PVG values across bundler implementations or at least reach consensus on minimum PVG thresholds for a bundle of X to prevent fragmentation of the mempool.

We need a test for this added to the p2p spec test suite as well.

[shahafn]

@ch4r10t33r we're currently working on a standardized way to calculate gas fields for the bundlers. It's a complex issue, and we'll share it over our calls for some feedback.