import { CloakError } from './errors.js';
export type GlobalFlags = {
    pretty: boolean;
    quiet: boolean;
    out?: string;
};
export type Envelope = {
    ok: boolean;
    data?: unknown;
    error?: ReturnType<CloakError['toJSON']>;
    session_id?: string;
    page_id?: string;
};
export declare function emit(envelope: Envelope, flags: GlobalFlags): void;
export declare function ok(data: unknown, flags: GlobalFlags, ids?: {
    session_id?: string;
    page_id?: string;
}): void;
export declare function fail(err: unknown, flags: GlobalFlags): never;
export declare function writeBinaryOut(buf: Buffer, path: string): {
    path: string;
    size: number;
    sha256: string;
};
export declare function maybeFileOrBase64(buf: Buffer, out: string | undefined): {
    path?: string;
    size: number;
    sha256: string;
    base64?: string;
};
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