import 'zone.js';
import type { ContextData, TraceContext } from './types';
/**
 * Browser implementation of LogContext using Zone.js for async context
 * propagation (similar to AsyncLocalStorage in Node).
 */
export declare class LogContext {
    private static instance;
    private static fallbackCounter;
    static getInstance(): LogContext;
    /**
     * Run a function with a new context
     */
    run<T>(context: ContextData, fn: () => T): T;
    /**
     * Run a function with an extended context (merges with current)
     */
    extend<T>(additionalContext: Partial<ContextData>, fn: () => T): T;
    /**
     * Set context data for the current execution context
     */
    set(key: string, value: unknown): void;
    /**
     * Get a specific context value
     */
    get<T>(key: string): T | undefined;
    /**
     * Get all context data
     */
    getContext(): ContextData;
    /**
     * Set trace context
     */
    setTrace(trace: TraceContext): void;
    /**
     * Get current trace context
     */
    getCurrentTrace(): TraceContext | undefined;
    /**
     * Generate a unique ID for requests/operations
     */
    generateId(): string;
}