import { type ChatRole, type MutationHint } from "./types.js";
import { type DrizzleExecutor } from "../drizzle.js";
/**
 * Changes one active chatMembers role under that channel's independent management rules and atomically transfers private ownership.
 * Assigning owner demotes every prior owner row so a future rejoin cannot recreate a second owner; parent roles never propagate into children.
 */
export declare function channelMemberSetRole(executor: DrizzleExecutor, input: {
    actorUserId: string;
    chatId: string;
    userId: string;
    role: ChatRole;
}): Promise<{
    hint: MutationHint;
}>;
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