flashbots/rbuilder

feat: improve UsedStateEVMInspector by adding other op-codes that read or write

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#58 opened on Jul 13, 2024

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 (3 comments) (0 reactions) (0 assignees)Rust (207 forks)auto 404
enhancementgood first issuehelp wanted

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Description

During simulation we use an EVM inspector to get state that is used by a transaction by looking at the storage slots that a transaction reads and writes from. We could supplement this by adding other op-codes that read or write state. A few off the top of my head that we should add:

  • balance
  • selfbalance
  • create (balance and nonce is read)
  • create2 (balance and nonce is read)
  • selfdestruct (balance and nonce is read)

Do we need to support EXTCODECOPY, EXTCODEHASH, or EXTCODESIZE too? Not sure but I think so because some transactions might condition their execution on these and others might deploy contracts.

The goal would be to improve our coverage of what state is being used and how.

https://github.com/flashbots/rbuilder/blob/develop/crates/rbuilder/src/building/evm_inspector.rs

Contributor guide

Research direction
Study the existing UsedStateEVMInspector and implement missing opcodes for reading/writing state, such as BALANCE, SELFBALANCE, CREATE, CREATE2, SELFDESTRUCT, and optionally EXTCODE* opcodes.
Tech stack
rust
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
RustEthereum EVM
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75