ETH Gas Price Extension

A Chrome extension that displays the current Ethereum gas fees for slow confirmation directly on the extension icon badge.

Features

• Displays Ethereum gas price (95% confidence) on the extension icon
• Updates automatically every 5 minutes
• Click the extension icon to manually refresh the gas price
• Caches gas price data locally for efficient updates
• Error handling with visual indicators

Installation

1. Download or clone this repository
2. Open Chrome and navigate to chrome://extensions/
3. Enable "Developer mode" in the top right corner
4. Click "Load unpacked" and select the extension directory
5. The extension will be installed and ready to use

Usage

• The extension icon will show the current gas price in Gwei
• Click the icon to manually refresh the gas price
• The badge background is dark grey for normal operation, red for errors

API

This extension uses the Blocknative Gas Price API to fetch real-time Ethereum gas prices:

• Endpoint: https://api.blocknative.com/gasprices/blockprices?chainid=1
• Retrieves gas price with 95% confidence level

Permissions

The extension requires the following permissions:

• storage: To cache gas price data locally
• alarms: To schedule periodic updates
• Host permissions for https://ethgasprice.org/* (Note: Code uses Blocknative API)

Development

Files

• manifest.json: Extension manifest file
• background.js: Service worker handling gas price fetching and badge updates
• icon16.png, icon48.png, icon128.png: Extension icons

Building

No build process required - the extension runs directly from the source files.

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Test the extension
5. Submit a pull request

License

This project is open source. Please check the license file for details.