Lucky Races Integrates Chainlink VRF to Help Generate ‘Original Racer’ NFT Traits

We’re excited to announce that Lucky Races—a play-to-earn NFT metaverse racing game—has integrated Chainlink Verifiable Random Function (VRF) on Polygon mainnet. By integrating the industry-leading decentralized oracle network, we now have access to a tamper-proof and auditable source of randomness needed to generate unique genetic traits for each of our 10,000 Original Racers. Ultimately this creates a more exciting, transparent, and fraud-proof user experience, as users can rest assured that their chances of minting a racer with rare attributes are provably fair.

Original Racer NFTs are unique 3D characters with zany, fun personalities. They are also your entry into the Lucky Races metaverse, where you will race against other players for a chance to win our in-game token, $SLIVER.

To get an Original Racer, purchase an ERC-1155 Racer Key on your blockchain of choice (Ethereum, Polygon, Avalanche, Fantom, Arbitrum, or Optimism). Choose when to redeem your key. Once per day we will mint a batch of Original Racer ERC-721 NFTs for the keys that were redeemed. To generate attributes, each batch gets randomness from Chainlink VRF on Polygon and sends the Original Racers to their owners on Ethereum.

In order to generate the traits of our Original Racers in a provably fair way, we need access to a secure random number generator (RNG) that any user can independently audit. However, RNG solutions for smart contracts require several security considerations to prevent manipulation and ensure system integrity. For instance, RNG solutions derived from blockchain data like block hashes can be exploited by miners or validators, while off-chain RNG solutions derived from off-chain APIs are opaque and don’t provide users with definitive proof about the integrity of the process. 

After reviewing various solutions, we selected Chainlink VRF because it’s based on cutting-edge academic research, supported by a time-tested oracle network, and secured through the generation and on-chain verification of cryptographic proofs that prove the integrity of each random number supplied to smart contracts.

Chainlink VRF works by combining block data that is still unknown when the request is made with the oracle node’s pre-committed private key to generate both a random number and a cryptographic proof. The Lucky Races smart contract will only accept the random number input if it has a valid cryptographic proof, and the cryptographic proof can only be generated if the VRF process is tamper-proof. This provides our users with automated and verifiable assurances directly on-chain that the distribution of genetic traits for Original Racer NFTs is provably fair and was not tampered with by the oracle, outside entities, or the Lucky Races team.

After the Original Racer NFT launch, we will open the Lucky Races Beta game to our community.  Our game loop, powered by Chainlink Keepers, processes all player choices and actions fully on-chain.  The game loop calls on Chainlink VRF every Play Phase to power item pickups and other important game mechanics.  When we expand the metaverse to bring external NFTs into the game, we’ll rely on Chainlink VRF to generate their attributes!

“Randomness and on-chain processing are essential in fair play-to-earn gaming, and Chainlink sets the standard with VRF and Keepers. We would be struggling to build Lucky Races without the tools that Chainlink provides.”

Max Meier, Co-Founder

About Chainlink

Chainlink is the industry standard for building, accessing, and selling oracle services needed to power hybrid smart contracts on any blockchain. Chainlink oracle networks provide smart contracts with a way to reliably connect to any external API and leverage secure off-chain computations for enabling feature-rich applications. Chainlink currently secures tens of billions of dollars across DeFi, insurance, gaming, and other major industries, and offers global enterprises and leading data providers a universal gateway to all blockchains.

Learn more about Chainlink by visiting or reading the developer documentation at To discuss an integration, reach out to an expert

About Lucky Races

  • Lucky Races is a Play-to-Earn NFT Metaverse Racing Game on the Blockchain.
  • Players are part of zany, strategic fun on a shared game board!
  • Multiplayer Blockchain Races
  • On-chain, live, skill-based races where your choices matter.
  • Metaverse of NFTs
  • Bridge your NFTs into the Metaverse to join in, or mint one of our Original Racers.
  • Play to Earn $SLIVER Tokens
  • Earn $SLIVER, our in-game currency ERC-20 token, by racing against others or A.I.

To learn more about Lucky Races: