import type { MultipartBodyLike } from "./types";
export type MultipartFieldValue = string | number | boolean | Blob;
export type MultipartFileSource = string | Blob | ArrayBuffer | ArrayBufferView;
export interface MultipartFileOptions {
    filename: string;
    contentType?: string;
}
export interface MultipartFileValue extends MultipartFileOptions {
    data: MultipartFileSource;
}
export type MultipartValue = MultipartFieldValue | MultipartFileValue;
export type MultipartRecord = Record<string, MultipartValue | MultipartValue[]>;
export declare class MultipartForm implements MultipartBodyLike {
    private readonly formData;
    append(name: string, value: MultipartFieldValue): this;
    appendFile(name: string, value: MultipartFileSource, options: MultipartFileOptions): this;
    appendJson(name: string, value: unknown, filename?: string): this;
    toFormData(): FormData;
    static fromRecord(record: MultipartRecord): MultipartForm;
}
export declare function createMultipartForm(record?: MultipartRecord): MultipartForm;