Sperax — a blockchain company building algorithmic crypto-collateralized stablecoins denominated in USD on top of its BDLS public blockchain — is using Chainlink Verifiable Randomness Function (VRF) live on the Ethereum mainnet to select random block heights in a provably secure and fair manner.

These randomly selected block heights will determine the times at which upcoming airdrops to SPA holders on Ethereum will take place, happening between February and March 2021. Our use of Chainlink VRF comes in addition to our planned Chainlink oracle integration on the Sperax blockchain announced last fall.

We selected Chainlink VRF because it’s a verifiable random number generation (RNG) solution. It generates a random number and cryptographic proof using a user supplied seed and the Chainlink oracle node’s private key. The cryptographic proof verifies the integrity of the RNG process as being tamperproof, ensuring that any on-chain function relying on it is truly random and unbiased. The Sperax team, Chainlink oracle, or outside entities cannot tamper, predict, or influence the outcome, bringing verifiable fairness and transparency to our airdrops.