import type { AuthenticationState } from '../Types/index.js';
/**
 * Creates a file-based authentication state for the Rust bridge.
 *
 * All crypto keys, sessions, and identity are managed by the Rust engine
 * and persisted as `.bin` files via the bridge store. No `creds.json` needed.
 *
 * Returns a `saveCreds` no-op for upstream-Baileys API parity. Upstream
 * bots wire `ev.on('creds.update', saveCreds)` as the persistence hook;
 * in baileyrs the bridge auto-persists everything through the store, so
 * the function is a stable shim that lets the same call sites keep
 * working without changes.
 *
 * @param folder Directory to store bridge state files
 */
export declare const useMultiFileAuthState: (folder: string) => Promise<{
    state: AuthenticationState;
    saveCreds: () => Promise<void>;
}>;
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