export type LogLevel = 'none' | 'fatal' | 'error' | 'warn' | 'info' | 'debug' | 'trace';
export interface LoggerOptions {
    level?: LogLevel;
    prefix?: string;
    enabled?: boolean;
}
export declare class Logger {
    private static instance;
    level: LogLevel;
    prefix: string;
    enabled: boolean;
    constructor(options?: LoggerOptions);
    /**
     * @deprecated Use `new Logger(options)` instead. The shared instance ignores
     * `options` on every call after the first, so per-client configuration
     * (e.g. `logLevel`) is silently dropped.
     */
    static getInstance(options?: LoggerOptions): Logger;
    private shouldLog;
    private formatMessage;
    trace(message: string): void;
    debug(message: string): void;
    info(message: string): void;
    warn(message: string): void;
    error(message: string): void;
    fatal(message: string): void;
    child(bindings: Record<string, any>): Logger;
    setLevel(level: LogLevel): void;
    setPrefix(prefix: string): void;
    enable(): void;
    disable(): void;
}
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