export class SpotHistoryReq { private _symbol!:string; private _after!:string; private _before!:string; private _limit!:string; get symbol(): string { return this._symbol; } set symbol(value: string) { this._symbol = value; } get after(): string { return this._after; } set after(value: string) { this._after = value; } get before(): string { return this._before; } set before(value: string) { this._before = value; } get limit(): string { return this._limit; } set limit(value: string) { this._limit = value; } }