import { Request, Response, NextFunction } from 'express';
declare global {
    namespace Express {
        interface Locals {
            /**
             * An AbortSignal instantiated with the X-Unito-Operation-Deadline header. This header contains the timestamp
             * after which Unito will consider the operation to be timed out. You can use this signal to abort any
             * operation that would exceed this time frame.
             */
            signal?: AbortSignal;
        }
    }
}
declare function extractOperationDeadline(req: Request, res: Response, next: NextFunction): void;
export default extractOperationDeadline;