export interface OidcMetadata {
    readonly issuer: string;
    readonly authorizationEndpoint: string;
    readonly tokenEndpoint: string;
    readonly jwksUri: string;
}
export interface FetchOidcMetadataOptions {
    readonly issuer: string;
    readonly trustedEndpointOrigins?: readonly string[];
    readonly allowInsecureLoopback?: boolean;
    readonly timeoutMs?: number;
}
export interface OidcMetadataCacheOptions {
    readonly ttlSeconds?: number;
    readonly maxEntries?: number;
    readonly now?: () => number;
}
export interface OidcMetadataCache {
    get(options: FetchOidcMetadataOptions, cacheTtlSeconds?: number): Promise<OidcMetadata>;
}
type JsonObject = {
    readonly [key: string]: unknown;
};
export declare function fetchOidcMetadata(options: FetchOidcMetadataOptions): Promise<OidcMetadata>;
export declare function createOidcMetadataCache(options?: OidcMetadataCacheOptions): OidcMetadataCache;
export interface FetchJsonObjectOptions {
    readonly url: URL;
    readonly maxBytes: number;
    readonly timeoutMs: number;
    readonly allowExactHttpLoopbackEgress?: boolean;
    readonly authorizeUrl: (url: URL) => void;
    readonly kind: string;
}
export declare function fetchJsonObject(options: FetchJsonObjectOptions): Promise<JsonObject>;
export declare function parseStrictJsonObject(text: string, kind: string): JsonObject;
export declare function isPlainObject(value: unknown): value is JsonObject;
export {};
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