crytic/slither

Identify Functions that use delegatecall and msg.data for Echidna Printer

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#1,202 opened on May 9, 2022

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echidnaenhancementgood first issue

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Description

Describe the desired feature

Echidna should be able to access implementation contracts via a proxy contract that utilizes delegatecall with msg.data. This will allow easier fuzzing on proxy contracts. Currently, the user needs to create a wrapper for each of the functions that are in the implementation contract.

Ideally, the Slither printer would extract functions that use msg.data and associate the functions of the called contract into the calling contract.

Contributor guide

Research direction
Explore how Slither's current printers work, especially the Echidna printer. Study Solidity proxy patterns that use delegatecall with msg.data (e.g., OpenZeppelin's Proxy pattern). Identify how to detect delegatecall and msg.data usage in Slither's IR. Implement a new printer or modify existing to extract those functions.
Tech stack
python
Domain
blockchainsecurity
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
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.
Mostly clear
Prerequisites
PythonSolidityEVM
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40