randao-vdf

We are making the most secure randomness to date on ethereum.

Outline of the Solution without code

• Black box functionaliy: we have a smart contract $R$ which takes $i$ which is a block number as input. As output, once ready, the contract stores VDF(RANDAO(Block_i)) and emits some event.

list of the components

• Main smart contract $R$: [write from scratch + mix and match from https://github.com/paradigmxyz/zk-eth-rng/tree/main]
  • gets initial call with block number $i$ and emits RandomnessRequested event
  • Prover submits $x,\pi$, $R$
    • calls Axiom smart contract to get $RANDAO_i$
    • verifies $\pi$ is a proper proof for $x$ using $RANDAO_i$ as public witness
    • if proof verifiers stores $x$ and emits RandomnessFullfiled event
• off-chain VDF prover: [Wesolski verifier smart contract: https://github.com/kilic/evmvdf/tree/master, Wesolski prover: https://github.com/iotaledger/vdf]
  • listening to randomness requests events --> learns block number $i$
  • takes the RANDAO$_i$, evalaued $x= VDF(RANDAO_i)$ and produces proof $\pi$ that $x= VDF(RANDAO_i)$
  • posts $x,\pi$ to contract $R$
• Off-chain RANDAO-submitter: [script from scratch]
  • listens to RandomnessRequested and learns $i$
  • submits $blockhash_i$ and $blockheader_i$

Tasks

• Make Wesolski prover work (Wesolski prover: https://github.com/iotaledger/vdf)
• Make sure Wesolski verifier smart contract: https://github.com/kilic/evmvdf/tree/master accepts Wesolowski prover's proofs.
  • assume u can only accepttrue statements or something like that
• Wrap Wesolowski prover in off-chain script that calls it and submits to blockchain
• We should create a mapping from security level, etc, to VDF paraemters.
  • at least we should determine this ourself.
• Write RANDAO-submitter
  • make sure it works
• Write main contract
  • make sure that it works
• run tests on everything
• write a smart contract to gamble on die-flip