Circle Internet Financial has introduced a new payment flow within its Circle Payment Network (CPN) using an authorization framework built on Uniswap's Permit2 standard. This upgrade, known as Onchain Transaction V2, aims to simplify and accelerate onchain payment settlements by abstracting blockchain processing fees and streamlining transaction signatures. By leveraging Permit2, CPN enables signature-based approvals for USDC and EURC, facilitating a more efficient and seamless payment experience for developers. The system incorporates a new smart contract, the CPN PaymentSettlement Contract, which verifies and executes transactions while managing blockchain fees through a Relayer Service. This development represents a shift from the previous ERC-3009 model, offering a more flexible and stablecoin-agnostic design that enhances interoperability across the ERC-20 ecosystem. These advancements reduce the need for manual transaction management and eliminate the necessity of directly handling native tokens, making onchain payments more straightforward for developers.