import { Readable } from 'node:stream';
import { File } from 'formdata-node';
import { type MediaInput } from '../media-source/index.js';
export declare const MEDIA_PARAM_KEYS: ReadonlySet<string>;
export declare function needsMultipart(params: Record<string, unknown>): boolean;
export declare function generateAttachId(): string;
export declare function resolveMediaInput(input: MediaInput, useLocal?: boolean): Promise<string | File>;
export interface MultipartResult {
    body: Readable;
    headers: Record<string, string>;
}
export declare function buildSimpleMultipart(params: Record<string, unknown>, useLocal?: boolean, files?: ReadonlyMap<string, unknown>): Promise<{
    body: Readable;
    headers: Record<string, string>;
}>;
export declare function buildMediaGroupMultipart(params: Record<string, unknown>, useLocal?: boolean, files?: ReadonlyMap<string, unknown>): Promise<{
    body: Readable;
    headers: Record<string, string>;
}>;
export declare function rewriteRichMessage(params: Record<string, unknown>, useLocal?: boolean): Promise<{
    params: Record<string, unknown>;
    files: Map<string, unknown>;
}>;
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