Slither, the Solidity source analyzer

Slither is a Solidity static analysis framework written in Python 3. It provides an API to easily manipulate Solidity code, and integrates vulnerabilities detectors.

Features

With Slither you can:

• Detect vulnerabilities
• Speed up your understanding of code
• Build custom analyses to answer specific questions
• Quickly prototype a new static analysis techniques

Slither can analyze contracts written with Solidity > 0.4.

Some of Slither detectors are open-source, contact us to get access to additional detectors.

How to install

Slither uses Python 3.6.

Using Pip

$ pip install slither-analyzer

Using Gihtub

$ git clone https://github.com/trailofbits/slither.git & cd slither
$ python setup.py install 

Slither requires solc, the Solidity compiler.

How to use

$ slither file.sol

For example:

$ slither tests/uninitialized.sol
[..]
INFO:Detectors:Uninitialized state variables in tests/uninitialized.sol, Contract: Uninitialized, Vars: destination, Used in ['transfer']
[..]

If Slither is applied on a directory, it will run on every .sol file of the directory.

Checks available

By default, all the checks are run.

Check	Purpose	Impact	Confidence
--detect-uninitialized-state	Detect uninitialized state variables	High	High
--detect-uninitialized-storage	Detect uninitialized storage variables	High	High
--detect-pragma	Detect if different pragma directives are used	Informational	High
--detect-reentrancy	Detect if different pragma directives are used	High	Medium
--detect-solc-version	Detect if an old version of Solidity is used (<0.4.23)	Informational	High

Exclude analyses

• --exclude-informational: Exclude informational impact analyses
• --exclude-low: Exclude low impact analyses
• --exclude-medium: Exclude medium impact analyses
• --exclude-high: Exclude high impact analyses
• --exclude-name will exclude the detector name

Configuration

• --solc SOLC: Path to solc (default 'solc')
• --solc-args SOLC_ARGS: Add custom solc arguments. SOLC_ARGS can contain multiple arguments.
• --disable-solc-warnings: Do not print solc warnings
• --solc-ast: Use the solc AST file as input (solc file.sol --ast-json > file.ast.json)
• --json FILE: Export results as JSON

Printers

• --printer-summary: Print a summary of the contracts
• --printer-quick-summary: Print a quick summary of the contracts
• --printer-inheritance: Print the inheritance graph
• --printer-vars-and-auth: Print the variables written and the check on msg.sender of each function.

For more information about printers, see the Printers documentation

How to create analyses

See the API documentation, and the detector documentation.

License

Slither is licensed and distributed under the AGPLv3 license. Contact us if you're looking for an exception to the terms.