Validium Chain

Definition ∞ A Validium Chain is a type of Layer 2 scaling solution for blockchains that uses zero-knowledge proofs to verify off-chain transaction computations, similar to ZK-Rollups. However, unlike ZK-Rollups, Validium chains store transaction data off-chain, which allows for significantly higher transaction throughput. Users retain control over their funds via cryptographic proofs on the main chain.
Context ∞ Validium chains are a topic of interest in news concerning blockchain scalability and privacy solutions, particularly for applications requiring very high transaction volumes. Their design offers a trade-off between data availability and throughput, making them suitable for specific use cases like gaming or high-frequency trading. The security and data availability guarantees of Validium solutions remain a key area of discussion.