import { HashAlgorithm, SaltStrategy } from "../types.mjs";
/**
 * Builds the string that we will hash to get the next hash alphabet.
 *
 * @example
 * if we're prepending every hash, and this is the initial hash,
 * then we'll return `salt + secret`.
 *
 * @returns the string we're going to hash to get the next alphabet
 */
export declare function getPreHash({ secret, prevHash, salt, saltStrategy, }: {
    secret?: string;
    prevHash?: string;
    salt: string;
    saltStrategy: SaltStrategy;
}): string;
export declare function execRound_getNextHash({ secret, prevHash, count, salt, saltStrategy, hashAlgorithm, }: {
    secret?: string;
    prevHash?: string;
    count: number;
    salt: string;
    saltStrategy: SaltStrategy;
    hashAlgorithm: HashAlgorithm;
}): Promise<string>;
/**
 * Creates the first "alphabet" that we will index into.
 *
 * We have this separate, because the initialRecursions help us
 * chug on the secret.
 *
 * If the data's hex character is not in this alphabet, it will
 * be expanded just as any
 */
export declare function doInitialRecursions_keystretch({ secret, initialRecursions, salt, saltStrategy, hashAlgorithm, }: {
    secret: string;
    initialRecursions: number;
    salt: string;
    saltStrategy: SaltStrategy;
    hashAlgorithm: HashAlgorithm;
}): Promise<string>;
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