I want to have the parameters of a method that is part of an interface adhere to another interface.

Consider this IOrderBuilder interface which I use to build Order object from a class that is implementing it.

interface IOrderBuilder {
  setCustomer({ customerId }: { customerId: string; }): Order;
  // ...other methods
  
  setShippingAddress(address: IAddress): Order;

  // ...other methods
}

IAddress is also an interface –

interface IAddress {
  name: string;
  addressLine1: string;
  addressLine2: string;
  landmark: string;
  city: string;
  state: string;
  pincode: number;
}

Now what I want is to have an interface let’s say IShippingAddressParams, properties of whose are used as types for parameters of setShippingAddress method.

When I do it like this –

interface IShippingAddressParams {
  address: IAddress;
}

interface IOrderBuilder {
  setCustomer({ customerId }: { customerId: string; }): Order;
  // ...other methods
  
  setShippingAddress(params: IShippingAddressParams): Order;

  // ...other methods
}

In this case, I would need to pass an object while defining my setShippingAddress method like this – setShippingAddress(shippingParams: {address: IAddress}) {...}.

Instead, what I want is to be able to pass address directly like this – setShippingAddress(address: IAddress) {...}.