import type { EvoPackManifest } from "../pack/pack.ts";
import { type EvoPackRegistryEntry, type EvoPackRegistryEntryTrust, type EvoRawFileSource, type EvoTrustedRegistrySigner } from "./registry.ts";
export declare const EVO_PACK_REGISTRY_MAX_BYTES: number;
export declare const EVO_DISCOVERY_PACK_MANIFEST_MAX_BYTES: number;
export interface EvoPackDiscoveryClientOptions {
    readRegistryIndex: (source: EvoRawFileSource) => Promise<string>;
    fetchPackManifest: (source: EvoRawFileSource) => Promise<string>;
    trustedSigners?: readonly EvoTrustedRegistrySigner[];
}
export interface EvoDiscoveredPack {
    registrySource: EvoRawFileSource;
    entry: EvoPackRegistryEntry;
    trust: EvoPackRegistryEntryTrust;
}
/**
 * Read-only discovery over caller-provided transports. The client has no
 * ambient network or filesystem access: registry reads and manifest fetches
 * are explicit injected functions.
 */
export declare class EvoPackDiscoveryClient {
    private readonly readRegistryIndex;
    private readonly fetchManifestText;
    private readonly trustedSigners;
    constructor(options: EvoPackDiscoveryClientOptions);
    /** Read, validate, and merge registry indexes without downloading packs. */
    discover(registrySources: readonly EvoRawFileSource[]): Promise<EvoDiscoveredPack[]>;
    /** Fetch and cross-check a discovered pack's declared manifest metadata. */
    fetchPackManifest(pack: EvoDiscoveredPack): Promise<EvoPackManifest>;
}
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