import { type CallSummary, type MutationHint } from "../chat/types.js";
import { type DrizzleExecutor } from "../drizzle.js";
/**
 * Applies a participant join, leave, decline, or state change to callParticipants and records the matching callEvents entry.
 * Updating calls lifecycle and synchronization in the same transaction preserves a coherent roster and event timeline for every listener.
 */
export declare function callParticipationUpdate(executor: DrizzleExecutor, input: {
    actorUserId: string;
    callId: string;
    action: "join" | "decline" | "leave";
}): Promise<{
    call: CallSummary;
    hint: MutationHint;
}>;
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