slotok

Open Campus S3 application

Americans spend 2 hours a day watching short-form videos…

Source: Doug Shapiro, Maverix Insights MIDG data, Nielsen, 2024

What if I told them, they can make money doing it?

Meet slotok

Prototype Demo

How to play

This is a multiplayer game of speculation. A round in this game takes 1 minute. In each round, the game presents players with 3 instagram reels. Your objective is to guess which reel will be the most popular one, and bet on it. When a round ends, we tally votes (1 person 1 vote). If your guess turns out to be right, you can take money from players who bet it wrong.

To create an addictive experience

We feed the vote result back into the Instagram’s recommendation algorithm, so that boring reels don't show up in the game.

Match made in heaven

We multiply dopamine hits from doomscrolling by dopamine hits from gambling to create exponential dopamine hits.

Why me?

To build this app, we need

• timelock encryption, because votes on-chain shouldn't be read by anyone until the round ends, but it must become instantly readable when the round ends.
• zkVM, because we can't naively decrypt encrypted votes in Solidity, due to expensive gas cost. We need to outsource the computation of vote tallying off-chain trustlessly.
• on-chain sybil resistance schemes such as zk passport, because if a person can create multiple accounts in the app, he can create as many as votes as he pleases, and he wins the pot every time. The game breaks.

In short, to build this app, we need talented software engineers with expertise in programmable cryptography… I happened to be one of them.

My past works are:

• zkJSON: Selective disclosure for hashed JSON
  • This one got featured at zkSummit10.
• MynaWallet: Selective disclosure of personal information stored in Japanese ID card
  • For this work, my employer received a grant from Ethereum Foundation.
• Talk at Progcrypto Camp
  • The event organizers received a grant from Ethereum Foundation, but I did not!
• halo2css: Transpiler that converts a Halo2 circuit into a CCS circuit
  • For this work, I personally received a grant from Ethereum Foundation.

Why now?

The cryptography this app requires was not there before. Practical Timelock Encryption from Threshold BLS paper came out in 2023. zk passport schemes came out in 2023. zkVM became fast enough to be actually used in 2025.

My conviction

Crypto is stagnant. Everyone is building the same thing. Perp exchanges, prediction markets, launchpads… Crypto Twitter is hungry for something new. Novel cryptography will unlock novel mode of speculation. I offer Crypto Twitter what they need.

Endgame

To be the next pump.fun. Generate massive cash flow by taking fee on bets.