export interface PreparedBrowserUpload {
    readonly uploadId: string;
    readonly fileId: string;
    readonly size: number;
    readonly putUrl: string;
    readonly commitUrl: string;
    readonly deleteUrl: string;
}
export interface StreamedBrowserUpload {
    readonly received: number;
    readonly sourceSha256: string;
}
export interface ReadyBrowserAttachment {
    readonly fileRef: string;
    readonly fileId: string;
    readonly displayName: string;
    readonly detectedType: string;
    readonly size: number;
    readonly sourceSha256: string;
    readonly draft: boolean;
}
export interface ResolvedBrowserAttachment {
    readonly fileRef: string;
    readonly displayName: string;
    readonly detectedType: string;
    readonly size: number;
    readonly sourceSha256: string;
}
export interface AttachmentUploadApi {
    prepare(sessionId: string, file: File, signal?: AbortSignal): Promise<PreparedBrowserUpload>;
    upload(url: string, file: File, onProgress: (loaded: number, total: number) => void, signal: AbortSignal): Promise<StreamedBrowserUpload>;
    commit(url: string, sessionId: string, prepared: PreparedBrowserUpload, streamed: StreamedBrowserUpload, signal?: AbortSignal): Promise<ReadyBrowserAttachment>;
    cancel(url: string): Promise<void>;
    adopt(sessionId: string, fileId: string): Promise<void>;
}
export declare function attachmentContentUrl(sessionId: string, fileRef: string, baseUrl?: string): string;
export declare class BrowserAttachmentUploadApi implements AttachmentUploadApi {
    private readonly baseUrl;
    constructor(baseUrl?: string);
    prepare(sessionId: string, file: File, signal?: AbortSignal): Promise<PreparedBrowserUpload>;
    upload(url: string, file: File, onProgress: (loaded: number, total: number) => void, signal: AbortSignal): Promise<StreamedBrowserUpload>;
    commit(url: string, sessionId: string, _prepared: PreparedBrowserUpload, streamed: StreamedBrowserUpload, signal?: AbortSignal): Promise<ReadyBrowserAttachment>;
    cancel(url: string): Promise<void>;
    adopt(sessionId: string, fileId: string): Promise<void>;
    resolve(sessionId: string, fileRef: string): Promise<ResolvedBrowserAttachment>;
}