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README.md

Mixer Frontend

The frontend is a React 16 app written in TypeScript. It uses Parcel to handle source bundling.

Instructions

First, get at least 0.102 Kovan ETH (0.1 plus gas fees) from a faucet. Next, navigate to the UI in your web browser.

Enter the recipient's ETH address and click "Mix 0.1 ETH". This will trigger a MetaMask popup. Click submit. Do not close your browser window until you see the Countdown page.

Keep this browser window open till midnight UTC for the page to automatically mix the funds. To speed up this process for testing purposes, you can set the timestamp of the last entry in the localStorage MIXER JSON array to 0, and a yellow button will appear which you can click to trigger the mix.

This mix process downloads about 40MB worth of gzipped zk-SNARK keys and circuit data, generates a proof, and submits it to a centralised but noncustodial relayer. The relayer verifies the proof and submits a mix() transaction to the mixer contract located here.

Development

For a hot-reloading development setup, run the following command in this directory:

npm run watch

And launch http://localhost:1234 in your browser.

Production

To create a production build, run:

npm run build

Stylesheets

All stylesheets are written in LESS and stored in less/.

index.html imports index.less. In turn, index.less imports all other stylesheets named index.less in various subfolders.

We use convention to separate of style concerns.

  • constants.less: defines colour values, lengths, font sizes, and any absolute values used by the other stylesheets.

  • routes/index.less: defines styles common to all routes, and also imports all stylesheets in routes/.

  • routes/<name>.less: defines styles specific to routes/<name>.tsx

  • components/index.less: defines styles common to all components, and also imports all stylesheets in components/.

  • components/<name>.less: defines styles specific to components/<name>.tsx

The layout should be responsive. Media queries should go into each individual stylesheet. e.g. constants.less should contain a media query which sets different margins for different screen sizes, deposit.less should handle its own responsive styles, etc.