Chainrand.io - Chainlink VRF anywhere without limits

Chainrand Logo
Chainrand as a Chainlink VRF service
Cross-Industry Problem of Probability Manipulation
Chainrand as a VRF hybrid solution
How Chainrand works
Verifying projects using Chainrand
Hackathon deliverables completed
Hackathon prizes applied for
Chainrand future development roadmap

Inspiration

Random number generators (RNG) are widely used across multiple fields. However, they lack a verifiable process, making them vulnerable to manipulation and abuse. Multiple fields including academia, investment backtesting, and NFT generative art suffer from this same problem. This results in the loss of funds from failed promises, and in some cases a scam on investors. We were particularly challenged by NFT generative art projects that claimed to be "fair" launch but in reality skewed in favour of the original developers to get more rare NFT art pieces. A similar problem occurs in Casino-like protocols that claim to be "fairly run" but by choice of seed for a random generator, able to skew results in favour of the house.

Why it matters

With Chainrand, we have now enabled the wider community with a fair and transparent manner for creating probability related projects on the blockchain. This will help encourage people to trust projects and help users verify that indeed the random number generation has not been tampered with. This will also allow for different industries (investment backtesting, academic research of simulations) to adopt Chainlink more readily as with Chainrand it can solve these cross-industry problems of P-hacking and RNG manipulation.

What it does

Leveraging VRF, we introduce a new service standard to cryptographically generate fair probability distributions used for any probability experiment without cherry-picking. This allows any user without a background in solidity or smart contracts to verifiably generate an unlimited array of random numbers over a chosen probability distribution that can help with their own projects - without cherry-picking.

Chainrand uses Chainlink VRF to be the best of both worlds:

Efficiency and flexibility of off-chain RNG computations (Compute with common programming languages like Python & JavaScript)
Seeded with the verifiable fairness of on-chain Chainlink VRF

How we built it

We introduce the Chainrand NFT Smart Contract deployed in Polygon's Mumbai Testnet. For ease of adoption, we have provided deterministic cryptographically-secure RNG software development kits (SDKs) in C++, Python, JavaScript. Developers can now do heavy stochastic computations off-chain with the SDKs, and tie their code to Chainrand in an immutable manner, demonstrating that the random numbers are generated in a fair manner.

As a demo, we also developed a NFT generative art project that uses Chainrand as a source of verifiable randomness that is seeded by Chainlink VRF.

We also created a DAPP frontend at https://chainrand.io for easy interaction with the Chainrand smart contract, so that that anyone can verify the integrity of projects using Chainrand.