import type { DecodeResult, WordHandleProfile, WordHandleProfileName } from './types.js';
/** Identifier of the lexicon layout profile used by this codec. */
export declare const LEXICON_PROFILE = "single-list-v1";
/**
 * Built-in word handle profiles. Word count = dataWords + checksumWords;
 * prefixBits = 11 * dataWords.
 *
 *   compact:        4+1 (44 bits). Set-scoped display ONLY; render-time
 *                   uniqueness plus lengthening is mandatory
 *                   (minUniquePrefixBits is the tool).
 *   default:        6+1 (66 bits). Minimum for any cross-set reference.
 *   high_assurance: 8+2 (88 bits). Archival and adversarial contexts.
 */
export declare const PROFILES: Readonly<Record<WordHandleProfileName, WordHandleProfile>>;
/**
 * Encode the first `prefixBits` bits of `input` as a word_digest_handle:
 * prefixBits/11 data words followed by `checksumWords` checksum words.
 *
 * `input` is raw bytes or a hex string; a leading "sha256:" prefix on
 * hex input is stripped. Throws when prefixBits is not a positive
 * multiple of 11, when the input supplies fewer than prefixBits bits,
 * or when checksumWords is not 1 or 2.
 */
export declare function encode(input: Uint8Array | string, prefixBits?: number, checksumWords?: number): string[];
/** Encode with a named profile (prefixBits and checksumWords from the table). */
export declare function encodeProfile(input: Uint8Array | string, profile: WordHandleProfileName): string[];
/**
 * Decode a word_digest_handle. Never throws on unknown words (reported
 * via `outOfLexicon`); throws when checksumWords is not 1 or 2 or when
 * the word count leaves no data words.
 *
 * `prefixHex` is the full packed prefix, 2*ceil(prefixBits/8) lowercase
 * hex characters with trailing pad bits zero; `prefixBits` is returned
 * so consumers compare BIT-scoped, never by raw string beyond
 * prefixBits. Localization (`failedWordIndex`) is best effort and only
 * attempted when the checksum fails and every word is in the lexicon.
 * See DecodeResult for the exact rules.
 */
export declare function decode(words: readonly string[], checksumWords?: number): DecodeResult;
/**
 * Decode with a named profile. Throws when the word count does not
 * match the profile shape (dataWords + checksumWords).
 */
export declare function decodeProfile(words: readonly string[], profile: WordHandleProfileName): DecodeResult;
/**
 * Smallest multiple of 11 that is >= startBits such that the leading
 * prefixes of all digests are pairwise BIT-distinct at that length.
 *
 * Hex inputs may carry "sha256:" prefixes (stripped) and are compared
 * case-insensitively. Throws on empty input or duplicate full digests
 * (no prefix length can separate identical digests).
 */
export declare function minUniquePrefixBits(digestsHex: readonly string[], startBits?: number): number;
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