solhint-plugin-gsn

This Solhint plugin lets you ensure that none of your contracts use msg.sender or msg.data, specifically intended for use with contracts and codebases which integrate with Gas Station Network, which has specific implementations of these functions. Caveat: the plugin will not be able to scan for usages in imported code from outside your working tree (such as in node_modules) unless you explicitly specify this.

Setup

First install the necessary packages:

npm install --save-dev solhint solhint-plugin-gsn

Then add a .solhint.json configuration file:

{
    "plugins": ["gsn"],
    "rules": {
        "gsn/ensure-gsn-compatible": "error"
    }
}

This rule will emit the following errors:

• An error if any of your contracts use msg.sender or msg.data
• An error if any of your contracts are non-inherited and do not import Context.sol from GSN/OZ.
• An error if any of your contracts are non-inherited and do not inherit Context.sol from GSN/OZ.

Furthermore, the plugin can also attempt to fix these problems if used with --fix.