Randomness is an important component of numerous web3 applications designed for gaming, gambling, lotteries and DeFi. However, the nature of the blockchain prevents smart contracts from being able to…

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Smart contracts on blockchain cannot achieve true randomness due to the deterministic nature of blockchains, pushing developers to use pseudo-random number generators (PRNGs). Methods relying on block properties or blockhashes are susceptible to miner tampering and predictability. External solutions like Chainlink VRF and onchain VRFs like Harmony VRF offer more secure random number generation but come with additional costs. The Signidice algorithm and the commit-reveal approach provide additional methodologies, each with their own sets of advantages and limitations. The choice of method depends on the specific requirements and incentives of the contract.

Insecure Randomness in Smart Contracts

<p>The article should mention <a href="https://internetcomputer.org/docs/current/developer-docs/smart-contracts/advanced-features/randomness" target="_blank" rel="noopener nofollow">ICP’s on-chain randomness</a> too, which can potentially be used on EVMs by leveraging on the cross-chain capabilities of the Internet Computer, also known in the space as <a href="https://internetcomputer.org/chainfusion" target="_blank" rel="noopener nofollow">Chain Fusion</a>.</p>


<p>Wow!! As far as I knew, true randomness was impossible in computer science. I mean, what computers do is pseudo-randomness numbers, always. How would I perform true randomness numbers? I’m afraid I need to look into deeper in this topic xD.</p>
