import { fstatSync } from "node:fs";
export interface GrabAttachmentRecord {
    id: string;
    origin: "drop" | "paste" | "path";
    name: string;
    mime: string;
    bytes: number;
    sha256: string;
    width: number | null;
    height: number | null;
    path: string;
    sourcePath: string | null;
}
export declare var MAX_ATTACHMENT_BYTES: number;
export declare var MAX_ATTACHMENT_BODY_BYTES: number;
export declare var INBOX_MAX_AGE_MS: number;
export declare class AttachmentError extends Error {
    status: number;
    constructor(status: number, message: string);
}
export declare function grabInboxRoot(): string;
export declare function sessionInboxDir(sessionKey: string): string;
export declare var MAX_SESSION_ATTACHMENTS: number;
export declare function pruneGrabInbox(now?: number, maxAgeMs?: number): {
    removed: string[];
};
export declare function parseMultipartFile(contentType: string, body: Buffer): {
    name: string;
    mime: string;
    bytes: Buffer;
    origin: "drop" | "paste";
};
export declare function storeAttachmentBytes(sessionKey: string, input: {
    name: string;
    declaredMime: string;
    bytes: Buffer;
    origin: "drop" | "paste";
}): GrabAttachmentRecord;
export declare function storeAttachmentPath(sessionKey: string, input: {
    path: string;
    projectDir: string;
}): GrabAttachmentRecord;
export declare function openAttachmentFile(path: string): {
    fd: number;
    stat: ReturnType<typeof fstatSync>;
};
export declare function attachmentOpenError(error: unknown, resolved: string): AttachmentError;
export declare function handleAttachmentRequest(sessionKey: string, projectDir: string, contentType: string, body: Buffer): {
    status: number;
    body: unknown;
};