/*!
 * Copyright (c) 2026 Interop Alliance. All rights reserved.
 */
/**
 * The last-write-wins tiebreak for a mutable head document. Pure -- no React, no
 * storage imports -- so both replicas run this identical rule against the same
 * two payloads and converge on the same winner with no coordination.
 *
 * `updatedAt` (an ISO-8601 string) decides, compared CHRONOLOGICALLY (parsed to
 * epoch ms, never lexically -- `updatedAt` is app-owned, so mixed precision like
 * `...05Z` vs `...05.400Z`, or a `+00:00` offset, must still order by instant);
 * `writerId` breaks an exact-instant tie deterministically. Both fields live in
 * the payload (never the envelope-level checkpoint `updatedAt`).
 */
/**
 * The two fields the last-write-wins rule reads off a payload: the app-owned
 * ISO-8601 edit stamp and the writing client's id (the exact-instant
 * tiebreaker). Read off a doc with {@link lwwFields}; compared with
 * {@link remotePayloadWins}.
 */
export interface LwwFields {
    updatedAt: string;
    writerId: string;
}
/**
 * Whether the remote payload wins over the local one under last-write-wins.
 * The chronologically later `updatedAt` wins; on an exact-instant tie the
 * lexically greater `writerId` wins (an arbitrary but deterministic,
 * replica-independent choice).
 *
 * Unparseable `updatedAt` values are rejected as losers: a side whose stamp
 * does not parse loses to one whose stamp does (a replica-independent rule, so
 * every device converges on the same winner). When neither side parses, the
 * lexical compare of the raw strings is the deterministic fallback.
 *
 * @param remote {LwwFields}
 * @param local {LwwFields}
 * @returns {boolean}   true if the remote payload should replace the local one
 */
export declare function remotePayloadWins(remote: LwwFields, local: LwwFields): boolean;
/**
 * Reads the LWW fields off a doc when it carries them. Storage payloads are
 * generic over `{ id: string }`, so docs without `updatedAt`/`writerId` are
 * legal; callers fall back to their own rule for those.
 *
 * @param doc {unknown}
 * @returns {LwwFields | null}
 */
export declare function lwwFields(doc: unknown): LwwFields | null;
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