export type NetworkPolicyMode = "none" | "package-registry-only" | "github-only" | "allowlist" | "unrestricted";
export interface PolicyFetchOptions {
    readonly url: string;
    readonly userAgent: string;
    readonly mode: NetworkPolicyMode;
    readonly allowlist?: readonly string[];
    readonly etag?: string | null;
    readonly lastModified?: string | null;
    readonly timeoutMs?: number;
    readonly maxBytes?: number;
}
export declare class NetworkBlockedError extends Error {
    readonly url: string;
    readonly reason: string;
    constructor(url: string, reason: string);
}
export declare class ResponseTooLargeError extends Error {
    readonly url: string;
    readonly limitBytes: number;
    constructor(url: string, limitBytes: number);
}
export interface PolicyFetchResult {
    readonly status: number;
    readonly notModified: boolean;
    readonly body: string;
    readonly etag: string | null;
    readonly lastModified: string | null;
}
export declare function isHostBuiltInTrusted(url: URL): boolean;
export declare function policyFetch(options: PolicyFetchOptions): Promise<PolicyFetchResult>;
//# sourceMappingURL=policy-fetch.d.ts.map