import { type PasswordOptions } from './types.js';
/**
 * Estimate the entropy bits for a password generated with the given options
 *
 * Entropy is calculated as: log2(poolSize^length)
 * This assumes each character position is chosen independently from the full pool.
 *
 * Note: The actual entropy may be slightly lower when using requireEachSelectedClass
 * due to the constraint that certain character classes must be represented, but this
 * provides a reasonable approximation for security purposes.
 */
export declare const estimateEntropyBits: (options?: Partial<PasswordOptions>) => number;
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