@usethrottle/cart
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    Interface CheckoutHandoffInput

    interface CheckoutHandoffInput {
        allowedMethods?: string[];
        cancelUrl: string;
        customerEmail?: string;
        keepOpen?: boolean;
        returnUrl: string;
    }
    Index
    allowedMethods?: string[]
    cancelUrl: string
    customerEmail?: string
    keepOpen?: boolean

    Leave the cart session open after handing off, so a buyer who backs out of checkout returns to a live cart. Throttle's own hosted cart page sets this.

    returnUrl: string