import { Request, Response, NextFunction } from 'express';
export declare function csp({ extraScript, extraStyle, extraConnect, extraFont, extraImg, defaultCsp }?: {
    extraScript?: string[] | undefined;
    extraStyle?: string[] | undefined;
    extraConnect?: string[] | undefined;
    extraFont?: string[] | undefined;
    extraImg?: string[] | undefined;
    defaultCsp?: {} | undefined;
}): (req: Request, res: Response, next: NextFunction) => void;
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