Creating a Firestore Schema with Timestamp Fields for TypeScript Validation

export class Timestamp {
  constructor(seconds: number, nanoseconds: number);
  static now(): Timestamp;
  static fromDate(date: Date): Timestamp;
  static fromMillis(milliseconds: number): Timestamp;
  readonly seconds: number;
  readonly nanoseconds: number;
  toDate(): Date;
  toMillis(): number;
  isEqual(other: Timestamp): boolean;
  valueOf(): string;
}