Point of Sale System

The first thing you should do if you want to create a pop-up local economy is have a phone, tablet, or laptop open to https://xdai.io. You will start with an empty wallet:

Inexpensive Amazon Fire Tablet running the Burner wallet at https://xdai.io

If you would like to create a QR code to accept funds for a specific item or group of items, hit the “Request” button. Type in the item name and the amount you want to charge. Then, this will generate a QR code to display:

Hit “Request” to create a QR code that a customer can scan with their camera to purchase with Burner.

Now you are ready to start accepting payments for “Avocado Toast” for $0.25 each. As payments come in they will be displayed in the history at the bottom.

One trick is to copy the private key or use the same seed phrase for your POS as you do on your laptop so it is easier to print these QR codes. Do this magic and more in the “Advanced” section of the Burner.

Onboarding Participants

At large events we use a Solidcoin or paper wallet that contains a QR code of a private key.

Solidcoin containing a https://buffidai.io private key preloaded with BUFF tokens and gas.

Paper wallet containing a https://burnerwallet.io private key preloaded with BURN tokens and gas.

Super easy onboarding: A participant scans a QR code with their camera and they have a wallet preloaded with tokens and gas:

Scanning a https://burnerwallet.io private key preloaded with BURN tokens and gas.

A Burner wallet loaded with $8.00 of BURN token and $0.01 xDai for gas.

The participant’s phone is loaded up with tokens and they are ready to purchase something!

Note that in the image above, the wallet is running on a token but an event can also run directly on xDai too. Deploying a custom token and white labeled wallet is great for large events with a budget but might not fit well with small meetups. In the next section we’ll see how a wallet running directly on xDai can purchase from a pop-up point of sale system:

The Purchase

A participant approaches a pop-up point of sale system and scans the QR code to purchase an item:

After scanning they are prompted with all of the information of the purchase:

The point of sale system can see their balance increase and a new item added to their transaction history. A quick glance at the tablet and the participant’s receipt can also help with visual validation.

Offramping Vendors

Anyone can use the “Exchange” button in the Burner to move xDai to DAI and DAI to ETH. But, we can also make an easy mode where they burn tokens and you send DAI to their Wyre account.

Simple Live Demo

I think the best demo of the Burner being used as a pop-up POS system is me seeding a wallet, buying a beer, and chugging it in 52 seconds. But maybe you want to do something a little more professional for your group? Good call.

The fastest way to demo the Burner is usually goes like this: You tell someone to visit xdai.io on their phone. Then, you ask them to hit “Receive” and you send them a couple bucks to play around with. I think there is a slightly better way to demo and that’s using the “Link” button to share a QR or link with funds:

For a small, informal demo, you can share a link from an existing Burner wallet. Click “Link”, type in an amount to send, and then share that QR code or link url with the participant. Many new phones can scan QR codes with the native camera and it will just bring up a wallet with funds.

Not all Android phones have a native QR code scanner for the camera. With some phones you have to just type in “xdai.io” and use the Burner wallet scanner.

When this QR code is scanned or the link is visited on another phone, the funds are claimed to a new or existing wallet: