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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              ### Interaction

    <a href="https://cosmic.link/?type=changeTrust&network=test&asset=GILS:gils*cosmic.plus">
      <input type="button" value="Trust GILS on testnet">

### Description

This pen shows how to pass a trustline opening request from a simple HTML button. It uses the CosmicLink protocol.

### Concepts

- [Trustline](https://www.stellar.org/developers/guides/concepts/assets.html#trustlines): A declaration that you accept to hold a given asset.
- [CosmicLink](https://cosmic.plus/#view:js-cosmic-lib/#what-are-cosmiclinks): A protocol to encode Stellar transactions into URIs.

### Keypoints

- GILS is an asset issued by Cosmic.plus to reward people who solve Pen of the Week challenges. [Read more...](https://codepen.io/cosmic-plus/full/eYOeoWZ)
- By looking at the code, you should be able to make sense of the link in the `href` attribute.
- The part starting from the `?` is the transaction request.
- The part before the `?` is the handler address.
- Other handlers are available, such as `https://stellar-authenticator.org` or the CosmicLink debugger linked bellow.

### Challenges

- **easy/** Edit the code to create a `[Trust GILS on public]` button. `(1000 GILS)`
- **hard/** Edit the code to create a `[Close GILS trustline]` button that passes its request to the CosmicLink debugger. `(3000 GILS)`

_Give it a try by editing the code, and be the first to post a solution on GalacticTalk to claim the reward!_

### Documentation

- [CosmicLink Cheatsheet](https://cosmic.plus/#view:js-cosmic-lib/web/doc/tutorial-20-cheatsheet-query.html)
- [CosmicLink Debugger](https://cosmic.plus/js-cosmic-lib/web/demo)

### Social

- [Discuss that pen on GalacticTalk](https://galactictalk.org/d/2132-pen-of-the-week-html-only-open-trustline-button)
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