import type { NodeishFilesystem } from "../interface.js";
/**
 * Serializes the filesystem to a JSON object that can be sent over the network.
 * File data is base64 encoded.
 *
 * Use `resolveFrom` to define the directory to resolve from.
 *
 * Use `matchers` to define which files to include. Uses
 * https://github.com/axtgr/outmatch#syntax for matching.
 *
 * @example
 *   // match everything but node_modules
 *   const result = await toJson(fs, {
 * 		matchers: [
 * 			"**\/*"
 * 			"!node_modules"
 * 		],
 * 		resolveFrom: "/"
 * 		})
 *
 *   	>> { "file1.txt": "29udGVudDE=", "file2.txt": "Y29udGVudDM="" }
 *
 */
export declare function toJson(args: {
    fs: NodeishFilesystem;
    matchers: string[];
    resolveFrom: string;
}): Promise<Record<string, string>>;
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