.wewell's thread

export const OrderId = S.UUID;

export class PendingOrder extends S.Class<PendingOrder>()({
  id: OrderId,
  status: S.literal('pending'),
  createdOn: S.Date,
}) {}

export class CompletedOrder extends PendingOrder.extend<CompletedOrder>()({
  status: S.literal('completed'),
  completedAt: S.Date,
}) {}

export const Order = S.union(PendingOrder, CompletedOrder);
export type Order = S.Schema.To<typeof Order>;

export const OrderId = S.UUID;

export class PendingOrder extends S.Class<PendingOrder>("PendingOrder")({
  id: OrderId,
  status: S.literal('pending'),
  createdOn: S.Date,
}) {}

export class CompletedOrder extends PendingOrder.extend<CompletedOrder>("CompletedOrder")({
  status: S.literal('completed'),
  completedAt: S.Date,
}) {}

export const Order = S.union(PendingOrder, CompletedOrder);
export type Order = S.Schema.Encoded<typeof Order>;