What Is Client-Side Validation (CSV)?
Client-Side Validation (CSV) is a security model where a client (a user's light wallet or application) performs crucial verification steps locally to ensure the integrity and validity of data before trusting it. This model is essential for preserving privacy and reducing the computational load on the full network nodes.
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🕒 2:17 PM
📅 Nov 05, 2025
✍️ By Nathanael707
Defining Client-Side ValidationCSV shifts the burden of verification from the centralized server (or full node) to the user's device. This is often accomplished using cryptographic proofs that are small enough for a personal device to verify quickly.
Local Verification: The user verifies the correctness of data using cryptographic tools like Merkle Proofs (already approved) or ZK-proofs.
Decentralized Trust: Reduces the need for the user to trust a third-party full node implicitly.
Privacy: Enables users to verify data relevant to them without revealing all of their activity to a third-party node.
Application in Wallet Security
CSV is a necessary component for many modern light wallets.
SPV (Simple Payment Verification): A prime example where the client uses a Merkle Proof to verify that their transaction was included in a block without checking all transactions.
Data Integrity: The client verifies that the data received from a node has not been tampered with since being published to the main chain.