eth-permissions 0.4.1

Library and command line tool for auditing smart contract permissions

Eth permissions audit library

This project defines a simple library for obtaining smart contract permissions and building a graph.

It's aimed at contracts using Openzeppelin's AccessControl module.

Installation

You'll need to have graphviz installed: apt-get install graphviz.

Then simply install with pip or your preferred package manager:

pip install eth-permissions

Usage as a library

We use eth-prototype's wrappers for accessing the blockchain information. The simplest way to use it is to export the following environment variables:

export DEFAULT_PROVIDER=w3

# You can use any json-rpc node supported by web3py.
export WEB3_PROVIDER_URI=https://polygon-mainnet.g.alchemy.com/v2/<YOUR KEY>

Use the chaindata module to get the full permissions detail:

from eth_permissions.chaindata import EventStream

stream = EventStream("IAccessControl", "0x47E2aFB074487682Db5Db6c7e41B43f913026544")

stream.snapshot

# [
#  {'role': Role('DEFAULT_ADMIN_ROLE'),
#   'members': ['0xCfcd29CD20B6c64A4C0EB56e29E5ce3CD69336D2']},
#  {'role': Role('UNKNOWN ROLE: 0x2582...a559'),
#   'members': ['0x9dA2192C820C5cC37d26A3F97d7BcF1Bc04232A3']},
#  ...
#  {'role': Role('UNKNOWN ROLE: 0xf17c...fd8a'),
#   'members': ['0x76B349e14a5B5FAF8090313Aa393e1b37aC5E126']},
# ]

You can register your roles to get the actual names in the result. See main.py for an example of how to do that.

Usage as a command line tool

First set up some env vars:

# Env vars for eth-prototype
export DEFAULT_PROVIDER=w3
export WEB3_PROVIDER_URI=https://polygon-mainnet.g.alchemy.com/v2/<YOUR KEY>

# Values for ensuro v2 on mainnet as of dec 2023, change accordingly for other contracts
export KNOWN_ROLES=GUARDIAN_ROLE,LEVEL1_ROLE,LEVEL2_ROLE,LEVEL3_ROLE,RESOLVER_ROLE,POLICY_CREATOR_ROLE,PRICER_ROLE,...
export KNOWN_COMPONENTS=0xa65c9dE776d1f30c095EFF9C775E001a1d366df8,0x37fE456EFF897CB5dDF040A5e95f399EaBc162ca
export KNOWN_COMPONENT_NAMES="KoalaV2,Koala Partner B"

Then run eth-permissions:

python -m eth_permissions --view --output test.png 0x47E2aFB074487682Db5Db6c7e41B43f913026544

This will create the file test.png and open it with the default viewer. It will look like this:

Run python -m eth_permissions --help to see all available flags and options.

App

Check app/Readme for a simple app that exposes this API over http for use on a frontend app.

TODO

• Add support for Ownable contracts
• Address book
• Add multisig intelligence (detect when a role member is a multisig and obtain its members)
• Timelock detection