URC turns Uniswap’s de facto standards track into an EIP-lite process before wallets, routers, and LP tooling hard-code assumptions around Permit2 and Universal Router. v4 makes that more urgent: hooks push custom execution into pools, and Uniswap said 150+ hooks existed at launch across Ethereum, Base, Arbitrum, Polygon and 6 other chains on Jan. 31, 2025. The process only matters if auditors and external integrators show up before code freezes; v4 shipped after 9 audits, 500+ contest participants, and a $15.5M bug bounty.

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