CardStarter Will Integrate Chainlink VRF to Get Provably Fair Randomness in Real Time

4 min readApr 16, 2021

We are excited to announce that CardStarter, a launchpad platform for Cardano projects, will integrate the industry-leading decentralized oracle solution Chainlink to gain access to a tamper-resistant, provably fair source of on-chain randomness. CardStarters will use Chainlink’s Verifiable Random Function (VRF) to provide users in the CardStarter ecosystem with strong assurance that all actions involving randomness will execute fairly without bias and securely without any possible manipulation from the oracle operators, miners, users, and CardStarter developers.

This integration of Chainlink VRF will serve as a transparent and fair RNG solution that selects CARDS holders in two key ways:

1. CardStarter uses a tiered system to reward CARDS holders with commensurate IDO allocations. Deuces is the lowest participation tier, requiring only 500 CARDS staked for eligibility. Deuces will conduct a Chainlink VRF-secured lottery for every IDO, which selects a predetermined number of random Deuces Tier holders to participate in the token sale.

2. Non-fungible tokens (NFTs) may be deployed on the platform at a later time as a reward for CARDS holder loyalty. The distribution of NFTs can be randomized using Chainlink’s VRF.

The integration of Chainlink VRF will play a key role in ensuring the CardStarter ecosystem provides equal and provably unbiased opportunities to all participants in regards to earning IDO participation rights and rewards of varying valuations. We are excited to see this integration come to fruition and further improve the CardStarter user experience.

Provably Fair Randomization

Using randomness as a key input can generate truly unpredictable outputs, but only if the source of randomness is tamper-proof. On top of being tamper-proof, high integrity systems also need to provide their users with definitive proof that the source of randomness they used is indeed tamper-proof and unpredictable.

We selected Chainlink VRF because it’s a tamper-proof and verifiable source of randomness purpose built for 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. This guarantees high integrity of the random number output because the cryptographic proof can only be generated if the VRF process is tamper-proof. Thus, CardStarter users can be assured that Chainlink VRF is providing them with provably fair and unbiased randomness when determining the winners of Deuces IDO lotteries.

“By generating more transparency and stronger security assurances to our users via Chainlink VRF, the CardStarter ecosystem will offer the most robust and provably fair decentralized accelerator and swapping platform in the Cardano ecosystem. We look forward to providing Deuces holders with equal opportunities for participating in upcoming IDOs, and plan to continue exploring various other ways that Chainlink VRF can be utilized to enhance the CardStarter experience.” — Shuffle, Founder of CardStarter

About CardStarter

CardStarter is the first Incubator, Launchpad and Insurance program for projects being built on the Cardano network. The CARDS platform is a unique and dynamic launchpad, connecting projects to early investors and a network of key partners. The Cards Accelerator Program (CAP) team works with each project individually to establish the right connections and map marketing strategies, establishing the foundation for long term success.

CardStarter is also differentiated by its charge to protect its supporters. CARDS provides unbiased third-party audits of every project’s code and protects IDO participants’ investments with an in-house insurance program. CardStarter is proudly partnered with X21 Digital, BlockSync Ventures, Moonwhale Ventures, Scryptic Tech and Longtail Financial. Once fully built, CardStarter will be an all-inclusive platform with a decentralized exchange to complement the current offerings. CardStarter also aims to be a nurturing force in the Cardano ecosystem, with hackathons and project development support being a major focus of the roadmap.

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About Chainlink

Chainlink is the most widely used and secure way to power universally connected smart contracts. With Chainlink, developers can connect any blockchain with high-quality data sources from other blockchains as well as real-world data. Managed by a global, decentralized community of hundreds of thousands of people, Chainlink is introducing a fairer model for contracts. Its network currently secures billions of dollars in value for smart contracts across the decentralized finance (DeFi), insurance and gaming ecosystems, among others.

Chainlink is trusted by hundreds of organizations to deliver definitive truth via secure, reliable data feeds. To learn more, visit, subscribe to the Chainlink newsletter, and follow @chainlink on Twitter.

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