A Randomizer Oracle

Related tags

General Utilities tezos-randomizer
Overview

Tezos Randomizer

Tezod Randomizer "Oracle".

It's a smart contract that you can call to get a random number between X and Y (for now).

It uses entropy from timestamp at calltime AND the Harbinger Oracle.

Contracts

Import

Randomizer = sp.io.import_script_from_url("https://ipfs.infura.io/ipfs/QmeQ8QUmbQ1oV9FQb65UxgbM5323yuKNFgk3WgTzgzeY3E")

Setup environment

./scipts/init-env.sh
source bin/activate
spy test tests.py output --html

Compile & Deploy

spy compile compile.py compiled
spy originate-contract --code compiled/randomizer/step_000_cont_0_contract.tz --storage compiled/randomizer/step_000_cont_0_storage.json --rpc https://granadanet.smartpy.io

TODO

  • Get fresh entropy on Request
  • Hangzhou views 🎉
  • Add more entropy (other sources too)
  • Look into rejection sampling
  • Expose more entrypoints

enjoy.

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Comments
  • feat: use rejection sampling

    feat: use rejection sampling

    Since I had some code handy for rejection sampling (from the skele drop), I thought I'd contribute it here. I didn't fix the tests yet because I don't have the time, and I have trouble with your dev setup. Let me know if you can use this. ✌️

    On a side note: I find the whole interface troubling since using the random numbers synchronously in the contract for a decision should definitely not be recommended. A toy use-case like rock-paper-scissors is fun but could quite easily be gamed by simulation considering the minimal injection time and front-running your entropy provider bots (if they happen to add new entropy in the same block). At the very least, a multi-stage process is needed to decouple the randomizer call from the entropy assignment. Even then, you need to trust the entropy providers, which is why we used ubinetic for the skele drop.

    opened by tsmcalister 2
Owner
Asbjorn Enge
Swinging madly across the sun.
Asbjorn Enge
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