币界网报道：This article introduces how Predicate, as a programmable compliance policy enforcement layer for DeFi, implements the execution of asset-specific rules through the hooks of Uniswap v4, supporting compliance and composability. The article mentioned that on June 12, 2023, a large-scale outage of Google Cloud affected multiple services including OpenAI, and TRM Labs blockchain compliance service was down for nearly 12 hours due to a Salesforce failure. Predicate uses a modular architecture to allow users to switch to another when one compliance provider goes down, ensuring the continuous operation of the policy layer. Taking Paxos' USDL stablecoin as an example, Predicate helps it achieve geo-fencing and compliance requirements while maintaining compatibility with Uniswap. Predicate emphasizes the composability and flexibility of the policy layer, adapts to the compliance needs of different jurisdictions, and promotes the development of institutional-level DeFi.