How we exchanged christmas gifts with ethereum

We are experimenting with different things you can do with ethereum tokens, this time a gift exchange game minigame

January 1, 2019. Category: Development

Secret Santa is a Christmas tradition in which members of a group or community are randomly assigned a person to whom they give a gift. The identity of the gift giver is a secret not to be revealed until after the gift is opened.

While secret santa is usually IRL, A cool thing about Blockchain is that you can escrow assets of users and use them programmatically, and we did just that a few weeks ago with a ver simple smart contract. This is how it worked:

  1. The last week of the year, players could send 1 Darkwinds card to the santa contract.
  2. On January 1, a command was sent to shuffle all the cards
  3. Now, all who participated can claim a random gift

The results are in, and this is what’s happened:

Players can claim their gift in the Loot section of Darkwinds.

This is a simple, but remarkable use of Ethereum because it provides the same utility of a lottery ball machine: It’s easy for us to prove that we’ll act honestly about gift allocation.

You can see the source code we used on GitHub, which should work with other ERC721 tokens too.


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