/**
 * Log levels enum
 */
export declare enum LogLevel {
    TRACE = "trace",
    DEBUG = "debug",
    INFO = "info",
    WARN = "warn",
    ERROR = "error",
    FATAL = "fatal",
    SILENT = "silent"
}
/**
 * Log format options
 */
export declare enum LogFormat {
    TEXT = "text",
    JSON = "json"
}
/**
 * Log destination options
 */
export declare enum LogDestination {
    CONSOLE = "console",
    FILE = "file",
    BOTH = "both"
}
/**
 * Logging configuration interface
 */
export interface LoggingConfig {
    level: LogLevel;
    format: LogFormat;
    destination: LogDestination;
    pretty: boolean;
    includeTimestamp: boolean;
    includeRequestId: boolean;
    filePath?: string;
    redactedFields: string[];
}
/**
 * Load logging configuration from environment
 * @returns Logging configuration
 */
export declare function loadLoggingConfig(): LoggingConfig;
/**
 * Check if a log level is valid
 * @param level The log level to check
 * @returns Whether the log level is valid
 */
export declare function isValidLogLevel(level: string): boolean;
/**
 * Check if a log level meets the minimum level
 * @param level The log level to check
 * @param minLevel The minimum log level
 * @returns Whether the log level meets the minimum
 */
export declare function shouldLog(level: LogLevel, minLevel: LogLevel): boolean;
/**
 * Redact sensitive fields from an object
 * @param obj The object to redact
 * @param fields Fields to redact
 * @returns Redacted object
 */
export declare function redactSensitiveFields(obj: Record<string, any>, fields: string[]): Record<string, any>;