import { type MidTurnState } from './midturn-settlement.js';
export interface CoordinatorDeps {
    /** 出网；返回 GatewayClient.send 的布尔值。frame 已含 client_msg_id；coordinator 只决定是否加 midTurn:true。 */
    send(frame: Record<string, unknown>): boolean;
    isArmed(): boolean;
    currentEpoch(): number;
    busy(conversationId: string): boolean;
    allowMidTurn(): boolean;
    read(conversationId: string, msgId: string): MidTurnState | undefined;
    write(conversationId: string, msgId: string, state: MidTurnState): void;
    listTracked(conversationId?: string): Array<{
        conversationId: string;
        msgId: string;
    }>;
}
export declare class MidTurnCoordinator {
    private deps;
    private held;
    private willRetryTurnIds;
    private convOf;
    constructor(deps: CoordinatorDeps);
    private enqueueHeld;
    heldCount(conversationId: string): number;
    /** 见下「submit 定序」。返回「是否已出网或已入 held」（held 也算 true：消息已被接管，hook 不 throw）；不建机器时 = deps.send 的返回值。⛔ 只回布尔、不回状态（A15 静态闸：本文件不得出现 settlement 冒号字面量，⛔ 连注释里也别写）。 */
    submit(conversationId: string, msgId: string, frame: Record<string, unknown>): boolean;
    private applyEach;
    private apply;
    /** forcePlain（只有 E12 路径传真，gw#2824）：held 项一律按普通帧放出并级联，不看会话忙不忙——message_dropped 可以早于宿主 finish 到达，那时按忙判会把 held 项当插话发出去。 */
    private drain;
    private rememberWillRetryTurn;
    /** raw 入站帧 → E1/E2/E3/E4/E6/E12（按 spec §4.1 过滤；session_ready 只产 E6）。⛔ 在 processing 集合更新之后调。 */
    onServerEvent(event: unknown): void;
    private static readonly E9_CAUSES;
    /** outbox 回调 → E9/E11（pending / arm_timeout / disarm / conn_terminal 不产事件）。 */
    onDeliveryState(msgId: string, state: 'pending' | 'delivered' | 'failed', cause?: string): void;
    onConnectionTerminal(epochBelow?: number): void;
    onConversationGone(c: string): void;
    onEscapeHatch(c: string): void;
}
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