import type { ArkmeSourceSendResult, ArkmeTimelineItem } from '../types.js';
import type { ArkmeUnifiedTimelineWindow } from '../unified-chat-timeline.js';
import { ConfirmedSendRetentionOwner } from './confirmed-send-retention.js';
interface SendFailure {
    state: 'failed' | 'uncertain';
    message: string;
}
export declare function conversationMessageRenderKey(item: ArkmeTimelineItem): string;
export declare function conversationMessageSendFailure(item: ArkmeTimelineItem): SendFailure | undefined;
export declare function conversationMessageDefaultUnread(item: ArkmeTimelineItem): boolean;
export declare function mergeConversationMessages(current: ArkmeTimelineItem[], incoming: ArkmeTimelineItem[]): ArkmeTimelineItem[];
export declare function applyConversationSendResult(current: ArkmeTimelineItem[], optimisticItemUid: string, result: ArkmeSourceSendResult, fallback?: ArkmeTimelineItem): ArkmeTimelineItem[];
/** One account-scoped merge owner for local sends, receipts, live deltas and read snapshots. */
export declare class ArkmeConversationMessageMergeOwner extends ConfirmedSendRetentionOwner<ArkmeTimelineItem> {
    private readonly capacity;
    private readonly submissions;
    constructor(capacity?: number);
    assertCanBegin(now?: number): void;
    begin(sourceKey: string, item: ArkmeTimelineItem, relationUid?: string): ArkmeTimelineItem;
    /** ACK can arrive after a read or live delta. Always upsert and keep newer record content. */
    confirm(sourceKey: string, originalUid: string, result: ArkmeSourceSendResult, fallback: ArkmeTimelineItem, current: ArkmeTimelineItem[]): ArkmeTimelineItem[];
    /** Transfer to the durable file owner, or cancel a failed/cancelled request. */
    releasePending(sourceKey: string, originalUid: string): void;
    fail(sourceKey: string, originalUid: string, message: string, uncertain: boolean, current: ArkmeTimelineItem[]): ArkmeTimelineItem[];
    forget(sourceKey: string, ids: readonly string[]): void;
    removeOccurrences(sourceKey: string, keys: ReadonlySet<string>): void;
    clear(): void;
    merge(sourceKey: string, incoming: ArkmeTimelineItem[], now?: number, previous?: readonly ArkmeTimelineItem[], window?: ArkmeUnifiedTimelineWindow): ArkmeTimelineItem[];
    private prune;
}
export {};
//# sourceMappingURL=conversation-message-merge.d.ts.map