import type { DebugLogger } from "../debug.js";
export declare const NOOP: DebugLogger;
interface ParsedPatterns {
    include: RegExp[];
    exclude: RegExp[];
}
/**
 * Parses a `DEBUG`-style pattern string into include/exclude regex lists.
 * Patterns prefixed with `-` go into `exclude`; everything else into `include`.
 *
 * Results are memoized against the last-seen `env` string, since
 * `process.env.DEBUG` is effectively constant within a process and
 * `createDebug` is called many times at startup.
 */
export declare function parsePatterns(env: string): ParsedPatterns;
/**
 * Checks whether a namespace is enabled under the given `DEBUG` pattern string.
 */
export declare function isEnabled(namespace: string, env: string): boolean;
export declare const COLORS: readonly number[];
/**
 * Picks an ANSI 256-colour code for a namespace, deterministic from its
 * characters.
 *
 * Uses a 32-bit FNV-1a hash followed by an xorshift finalizer. The finalizer
 * improves bit avalanche so the low bits used by `% COLORS.length`
 * distribute Hardhat's namespaces more evenly across the palette.
 */
export declare function selectColor(namespace: string): number;
/**
 * Reports whether ANSI colours should be used, honouring `DEBUG_COLORS` and TTY.
 */
export declare function useColors(): boolean;
export {};
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