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. In addition to exposing a Solidity contracts AST, Slither provides many APIs to quickly check local and state variable usage.

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

How to install

Slither uses Python 3.6.

$ python setup.py install

You may also want solc, the Solidity compiler, which can be installed using homebrew:

$ brew update
$ brew upgrade
$ brew tap ethereum/ethereum
$ brew install solidity
$ brew linkapps solidity

or with aptitude:

$ sudo add-apt-repository ppa:ethereum/ethereum
$ sudo apt-get update
$ sudo apt-get install solc

How to use

$ slither file.sol

$ slither examples/uninitialized.sol
[..]
INFO:Detectors:Uninitialized state variables in examples/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.

Options

Configuration

• --solc SOLC: Path to solc (default 'solc')
• --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
• --solc-args SOLC_ARGS: Add custom solc arguments. SOLC_ARGS can contain multiple arguments.

Analyses

• --high: Run only medium/high severity checks with high confidence
• --medium: Run only medium/high severity checks with medium confidence
• --low: Run only low severity checks

Printers

• --print-summary: Print a summary of the contracts
• --print-quick-summary: Print a quick summary of the contracts
• --print-inheritance: Print the inheritance graph

For more information about printers, see the Printers documentation

Checks available

Check	Purpose	Severity	Confidence
--uninitialized	Detect uninitialized variables	High	High

License

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