import type { AssetLoadError, AssetPublicationTuple, PackV2, Result } from '@forgeax/engine-types';
export interface PackReaderOptions {
    readonly fetcher?: typeof globalThis.fetch;
}
export type VerifiedPack = PackV2<unknown>;
/** Freeze an owned value; never pass a mutable retained Pack to this helper. */
export declare function freezePackValue<T>(value: T): T;
export declare class PackReader {
    private readonly fetcher;
    private readonly lifetime;
    private readonly verified;
    private readonly pending;
    constructor(options?: PackReaderOptions);
    read(packageUrl: string, expected: AssetPublicationTuple, signal: AbortSignal, fetcher?: typeof globalThis.fetch): Promise<Result<VerifiedPack, AssetLoadError>>;
    dispose(): void;
    private fetchAndVerify;
    private key;
    verify(value: unknown, expected: AssetPublicationTuple): Result<VerifiedPack, AssetLoadError>;
}
/** Complete Pack validation without freezing or retaining the caller's mutable input. */
export declare function validatePackEnvelope(value: unknown, expected: AssetPublicationTuple): Result<void, AssetLoadError>;
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