/**
 * Debug utility for controlled debug output
 * Can be enabled via:
 * 1. Config: steem.config.set({ debug: true })
 * 2. Environment variable: DEBUG=steem-js or DEBUG=steem-js:*
 * 3. Specific debug flags: DEBUG=steem-js:transaction,steem-js:signature
 */
export declare const debug: {
    /**
     * Log debug information
     * @param flag - Optional debug flag (e.g., 'transaction', 'signature')
     * @param args - Arguments to log
     */
    log(flag?: string, ...args: unknown[]): void;
    /**
     * Log transaction debug info
     */
    transaction(...args: unknown[]): void;
    /**
     * Log signature debug info
     */
    signature(...args: unknown[]): void;
    /**
     * Log warning (always shown, but can be controlled)
     */
    warn(...args: unknown[]): void;
    /**
     * Log error (always shown)
     */
    error(...args: unknown[]): void;
    /**
     * Check if debug is enabled for a specific flag
     */
    isEnabled(flag?: string): boolean;
};
export default debug;