/**
 * Minimal logger interface and default implementation.
 */
export type Logger = Record<"info" | "warn" | "error" | "log", (...args: unknown[]) => void> & {
    /** Derive a child logger that prepends `prefix` to every message. */
    withPrefix(prefix: string): Logger;
};
/**
 * Create a logger that writes to the global `console`.
 *
 * @param msgPrefix - Optional prefix prepended to every log line
 *   (e.g. `"[Transport]"`).
 */
export declare function createDefaultLogger(msgPrefix?: string): Logger;
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