We have upgraded the product to App Kit and recommend using it for all production deployments. USDCKit will remain available as a private beta product. Thank you.
@circle-fin/usdckit - v0.25.4
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    LOW: (
        __namedParameters: EstimateFeesPerGasParams,
    ) => Promise<Merge<FeeValuesEIP1559, { gas: bigint }>> = ...

    Pre-configured fee level estimation function. Uses the LOW fee level settings for transfer fee estimation.

    Type Declaration