Solhint Project

This is an open source project for linting Solidity code. This project provides both Security and Style Guide validations.

Installation

You can install Solhint using npm:

npm install -g solhint

# verify that it was installed correctly
solhint -V

Usage

For linting Solidity files you need to run Solhint with one or more Globs as arguments. For example, to lint all files inside contracts directory, you can do:

solhint "contracts/**/*.sol"

To lint a single file:

solhint contracts/MyToken.sol

Solhint command description:

Usage: solhint [options] <file> [...other_files]

Linter for Solidity programming language


Options:

  -V, --version                              output the version number
  -f, --formatter [name]                     report formatter name (stylish, table, tap, unix)
  -w, --max-warnings [maxWarningsNumber]     number of warnings to trigger nonzero
  -q --quiet                                 report errors only - default: false
  --ignore-path [file_name]                  file to use as your .solhintignore
  -h, --help                                 output usage information



Commands:

  stdin [options]         put source code to stdin of this utility
  init-config             create sample solhint config in current folder

Configuration

You can use a .solhint.json file to configure Solhint globally. This file has the following format:

  {
    "extends": "default",
    "rules": {
      "avoid-throw": false,
      "avoid-suicide": "error",
      "avoid-sha3": "warn",
      "indent": ["warn", 4]
    }
  }

To ignore files / folders that do not require validation you may use .solhintignore file. It supports rules in .gitignore format.

node_modules/
additiona-tests.sol

Configure linter with comments

You can use comments in the source code to configure solhint in a given line or file.

For example, to disable all validations in the line following a comment:

  // solhint-disable-next-line
  uint[] a;

You can disable a single rule on a given line. For example, to disable validation of fixed compiler version in the next line:

  // solhint-disable-next-line compiler-fixed, compiler-gt-0_4
  pragma solidity ^0.4.4;

Disable validation on current line:

  pragma solidity ^0.4.4; // solhint-disable-line

Disable validation of fixed compiler version validation on current line:

  pragma solidity ^0.4.4; // solhint-disable-line compiler-fixed, compiler-gt-0_4

You can disable a rule for a group of lines:

  /* solhint-disable avoid-throw */
  if (a > 1) {
    throw;
  }
  /* solhint-enable avoid-throw */

Or disable all validations for a group of lines:

  /* solhint-disable */
  if (a > 1) {
    throw;
  }
  /* solhint-enable */

Rules

Security Rules

Full list with all supported Security Rules

Style Guide Rules

Full list with all supported Style Guide Rules

Best Practices Rules

Full list with all supported Best Practices Rules

Prettier (experimental)

If you have prettier-plugin-solidity installed, you can use the prettier/prettier rule for reporting differences between your code and how prettier would format it. If you enable this rule, you should disable some of the style guides rules (mainly quotes, indent and two-lines-top-level-separator).

Documentation

Related documentation you may find there.

IDE Integrations

• Sublime Text 3
• Atom
• Vim
• JetBrains IDEA, WebStorm, CLion, etc.
• VS Code: Solidity by Juan Blanco
• VS Code: Solidity Language Support by CodeChain.io

Acknowledgements

The grammar used by solhint was created and is maintained by Federico Bond. You can find it here.

Licence

MIT

Who uses solhint?

Projects

• POA Network - Public EVM Sidechain:
  • Proof of Physical Address (PoPA)
  • Proof of Bank Account (PoBA)
• 0x
• Gnosis:
  • Gnosis Prediction Market Contracts
  • The DutchX decentralized trading protocol