/// <reference types="node" />
import { IntegrityMap } from 'ssri';
import { URL } from 'url';
import { UserscriptPluginInstance } from '../types';
import { Feature } from './feature';
export type RawSSRILock = Record<string, string>;
export type SSRILock = Record<string, IntegrityMap>;
export type SSRIAlgorithm = 'sha256' | 'sha384' | 'sha512';
export type SSRITag = 'require' | 'resource';
export type URLFilter = (tag: SSRITag, value: URL) => boolean;
export interface SSRIFeatureOptions {
    include?: URLFilter;
    exclude?: URLFilter;
    algorithms?: SSRIAlgorithm[];
    strict?: boolean;
    lock?: boolean | string;
    concurrency?: number;
}
export interface SSRIOptions {
    root?: string;
    ssri?: SSRIFeatureOptions;
}
export declare class ProcessSSRI extends Feature<SSRIOptions> {
    readonly name = "ProcessSSRI";
    readonly allowedProtocols: Set<string>;
    private ssriLockDirty;
    private ssriLock;
    private readonly limit;
    apply({ hooks }: UserscriptPluginInstance): void;
    private getSSRILockFile;
    private getTargetURLs;
    private normalizeURL;
    private filterURL;
    private computeSSRI;
    private parseSSRILike;
    private parseSSRILock;
    private toRawSSRILock;
    private parseURL;
    private stringifyURL;
    private updateURL;
    private patchHeaders;
}