import { type ArkmeExtensionArtifact, type ArkmeExtensionManifest } from './types.js';
export declare class ArkmeExtensionArtifactError extends Error {
    readonly code: string;
    constructor(code: string, message: string);
}
export declare function sha256Hex(value: Uint8Array | string): string;
export declare function assertExtensionArtifactSize(bytes: number, label?: string): void;
export declare function canonicalExtensionJson(value: unknown): string;
export declare function packArkmeExtension(input: {
    name: string;
    description: string;
    version: string;
    dshRange?: string;
    arkmeProviderContract: number;
    permissions?: readonly string[];
    hostCode?: string;
    clientCode?: string;
    assets?: Readonly<Record<string, Uint8Array>>;
}): ArkmeExtensionArtifact;
export declare function unpackArkmeExtension(bytes: Uint8Array): {
    manifest: ArkmeExtensionManifest;
    manifestSha256: string;
    hostCode?: string;
    clientCode?: string;
    files: ReadonlyMap<string, Buffer>;
};
export declare function canonicalExtensionSignatureMessage(input: {
    format_version: number;
    extension_id: string;
    version: string;
    artifact_sha256: string;
    manifest_sha256: string;
    published_at: number;
    signing_key_id: string;
}): Buffer;
//# sourceMappingURL=artifact.d.ts.map