export type SecurityHeaders = {
    crossOriginResourcePolicy?: CrossOriginResourcePolicyValue | false;
    crossOriginOpenerPolicy?: CrossOriginOpenerPolicyValue | false;
    crossOriginEmbedderPolicy?: CrossOriginEmbedderPolicyValue | false;
    contentSecurityPolicy?: ContentSecurityPolicyValue | string | false;
    originAgentCluster?: '?1' | false;
    referrerPolicy?: ReferrerPolicyValue | false;
    strictTransportSecurity?: StrictTransportSecurityValue | string | false;
    xContentTypeOptions?: XContentTypeOptionsValue | false;
    xDNSPrefetchControl?: XDnsPrefetchControlValue | false;
    xDownloadOptions?: XDownloadOptionsValue | false;
    xFrameOptions?: XFrameOptionsValue | false;
    xPermittedCrossDomainPolicies?: XPermittedCrossDomainPoliciesValue | false;
    xXSSProtection?: string | false;
    permissionsPolicy?: PermissionsPolicyValue | string | false;
    xPoweredBy?: string | false;
};
export type StrictTransportSecurityValue = {
    maxAge: number;
    includeSubdomains?: boolean;
    preload?: boolean;
};
export type CrossOriginResourcePolicyValue = 'same-site' | 'same-origin' | 'cross-origin';
export type CrossOriginOpenerPolicyValue = 'unsafe-none' | 'same-origin-allow-popups' | 'same-origin';
export type CrossOriginEmbedderPolicyValue = 'unsafe-none' | 'require-corp';
export type ReferrerPolicyValue = 'no-referrer' | 'no-referrer-when-downgrade' | 'origin' | 'origin-when-cross-origin' | 'same-origin' | 'strict-origin' | 'strict-origin-when-cross-origin' | 'unsafe-url';
export type XContentTypeOptionsValue = 'nosniff';
export type XDnsPrefetchControlValue = 'on' | 'off';
export type XDownloadOptionsValue = 'noopen';
export type XFrameOptionsValue = 'DENY' | 'SAMEORIGIN';
export type XPermittedCrossDomainPoliciesValue = 'none' | 'master-only' | 'by-content-type' | 'by-ftp-filename' | 'all';
export type PermissionsPolicyValue = {
    camera?: string[];
    'display-capture'?: string[];
    fullscreen?: string[];
    geolocation?: string[];
    microphone?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    accelerometer?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'ambient-light-sensor'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    autoplay?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    battery?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'document-domain'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'encrypted-media'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'execution-while-not-rendered'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'execution-while-out-of-viewport'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    gamepad?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    gyroscope?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    hid?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'idle-detection'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'local-fonts'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    magnetometer?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    midi?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    payment?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'picture-in-picture'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'publickey-credentials-get'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'screen-wake-lock'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    serial?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'speaker-selection'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    usb?: string[];
    'web-share'?: string[];
    /**
     * 🧪 Experimental. Expect browser behavior to change in the future.
     */
    'xr-spatial-tracking'?: string[];
};
type SecurityHeaderNames = Record<string, string>;
export declare const SECURITY_HEADER_NAMES: SecurityHeaderNames;
export type CSPSourceValue = "'self'" | "'unsafe-eval'" | "'wasm-unsafe-eval'" | "'unsafe-hashes'" | "'unsafe-inline'" | "'none'" | "'strict-dynamic'" | "'report-sample'" | "'nonce=<base64-value>'" | string;
export type CSPSandboxValue = 'allow-downloads' | 'allow-downloads-without-user-activation' | 'allow-forms' | 'allow-modals' | 'allow-orientation-lock' | 'allow-pointer-lock' | 'allow-popups' | 'allow-popups-to-escape-sandbox' | 'allow-presentation' | 'allow-same-origin' | 'allow-scripts' | 'allow-storage-access-by-user-activation' | 'allow-top-navigation' | 'allow-top-navigation-by-user-activation' | 'allow-top-navigation-to-custom-protocols';
export type ContentSecurityPolicyValue = {
    'child-src'?: CSPSourceValue[];
    'connect-src'?: CSPSourceValue[];
    'default-src'?: CSPSourceValue[];
    'font-src'?: CSPSourceValue[];
    'frame-src'?: CSPSourceValue[];
    'img-src'?: CSPSourceValue[];
    'manifest-src'?: CSPSourceValue[];
    'media-src'?: CSPSourceValue[];
    'object-src'?: CSPSourceValue[];
    'prefetch-src'?: CSPSourceValue[];
    'script-src'?: CSPSourceValue[];
    'script-src-elem'?: CSPSourceValue[];
    'script-src-attr'?: CSPSourceValue[];
    'style-src'?: CSPSourceValue[];
    'style-src-elem'?: CSPSourceValue[];
    'style-src-attr'?: CSPSourceValue[];
    'worker-src'?: CSPSourceValue[];
    'base-uri'?: CSPSourceValue[];
    sandbox?: CSPSandboxValue[];
    'form-action'?: CSPSourceValue[];
    'frame-ancestors'?: ("'self'" | "'none'" | string)[];
    'navigate-to'?: ("'self'" | "'none'" | "'unsafe-allow-redirects'" | string)[];
    'report-uri'?: string[];
    'report-to'?: string[];
    'upgrade-insecure-requests'?: boolean;
};
export type SecurityHeader = {
    key: string;
    value: string;
};
export {};