/** Generic local token file store: dir 0700, file 0600, exclusive lock. */
export declare class TokenStore<T = unknown> {
    private readonly tokenPath;
    constructor(tokenPath: string);
    private get lockPath();
    read(): Promise<T | null>;
    write(tokens: T): Promise<void>;
    clear(): Promise<void>;
    withLock<R>(fn: () => Promise<R>): Promise<R>;
}
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