import type { Context } from "hono";
export type JsonObject = Record<string, unknown>;
export declare const badRequest: (c: Context, message: string) => Response & import("hono").TypedResponse<{
    error: string;
}, 400, "json">;
export declare const asString: (value: unknown) => string | undefined;
export declare const asNonEmptyString: (value: unknown) => string | undefined;
export declare const asOptionalString: (value: unknown) => string | undefined;
export declare function readJsonObject(c: Context): Promise<JsonObject>;
export declare function safeParse<T = unknown>(json: string): T | null;
export declare const parseLastEventId: (value: string | undefined) => number | undefined;