import { Document, HydratedDocument, Types } from "mongoose";
export type NudgeHistoryDocument = HydratedDocument<NudgeHistory>;
export declare class NudgeHistory extends Document {
    business_id: Types.ObjectId;
    nudge_type: string;
    sent_at: number;
}
export declare const NudgeHistorySchema: import("mongoose").Schema<NudgeHistory, import("mongoose").Model<NudgeHistory, any, any, any, Document<unknown, any, NudgeHistory, any> & NudgeHistory & Required<{
    _id: unknown;
}> & {
    __v: number;
}, any>, {}, {}, {}, {}, import("mongoose").DefaultSchemaOptions, NudgeHistory, Document<unknown, {}, import("mongoose").FlatRecord<NudgeHistory>, {}> & import("mongoose").FlatRecord<NudgeHistory> & Required<{
    _id: unknown;
}> & {
    __v: number;
}>;