> For the complete documentation index, see [llms.txt](https://docs.galactica.com/galactica-developer-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.galactica.com/galactica-developer-documentation/galactica-components/zk-trusted-setup-ceremony/how-to-contribute.md).
# How to contribute?
#### Requirements
Before you start, please ensure you meet the following requirements:
* **Check for an Active Ceremony:** Contributions are only possible when a ceremony is open. Check the status at [**https://ceremony.galactica.com**](https://ceremony.galactica.com).
* **GitHub Account:** You will need a GitHub account to authenticate your contribution. This account will be used to post a verifiable hash of your contribution.
#### Option A: Contribute via Web Browser
This is the easiest method and is recommended for most users.
1. **Open the Ceremony Website:** Navigate to [**https://ceremony.galactica.com**](https://ceremony.galactica.com) .
2. **Log In:** Click the login button and authenticate with your GitHub account. You will be asked to authorize the application to post your contribution hash on your behalf.
3. **Select a Ceremony:** From the list of available ceremonies, choose the one you wish to contribute to.
4. **Contribute:** Once you've selected a ceremony, press the "Contribute" button to join the queue.
5. **Wait and Compute:** Keep the browser tab open and active. Your browser will first wait for your turn in the queue and then begin computing your contribution. This is a CPU-intensive process. For the initial ceremony icnluding standard zkKYC circuits, this may take around 10 minutes, but the exact time depends on the circuit's complexity and your computer's processing speed.
6. **Share (Optional):** Once your contribution is successfully submitted, you will receive a link to your public attestation. Share it on X/Twitter to show you've helped secure the Galactica Network!
#### Option B: Contribute via Command Line (Advanced)
For technical users who prefer the command line, the `phase2cli` provides a direct interface.
1. **Install the Tool:** First, install the CLI tool using `npm`.
```
npm install -g @galactica-net/phase2cli
```
2. **Authenticate:** Log in with your GitHub account. This will open a browser window for authentication.
```
phase2cli auth
```
3. **Contribute:** Run the contribute command to start the process.
```
phase2cli contribute
```
4. **Share (Optional):** After your contribution is complete, you can use the link in the console to share your public attestation on X/Twitter.
For more detailed instructions and advanced options for the `phase2cli`, please refer to the official [**P0tion Contributor Guide**](https://pse-team.notion.site/Contributor-Guide-ce8f7047468b41239dc512919644535c).
---
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