import { type Result } from '@forgeax/engine-types';
export type PackageFetcher = (url: string, init?: RequestInit) => Promise<Response>;
export interface PackageReadFailure {
    /** Last observation, e.g. `HTTP 404` or `TypeError: network error`. */
    readonly observed: string;
    readonly attempts: number;
    /** The transfer completed but `body` rejected its content (e.g. invalid JSON). */
    readonly malformed: boolean;
}
/** Read one package resource in full through `body`, so a body reset is retried too. */
export declare function readPackage<T>(fetcher: PackageFetcher, url: string, body: (response: Response) => Promise<T>, init?: RequestInit): Promise<Result<T, PackageReadFailure>>;
export declare const bytesOf: (response: Response) => Promise<Uint8Array>;
export declare const jsonOf: (response: Response) => Promise<unknown>;
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