---
url: 'https://adk.nht.io/api/@nhtio/adk/batteries/type-aliases/IsolatedFacade.md'
description: >-
  The host-side callable facade a [`IsolatedServiceSpec`](https://adk.nht.io/api/@nhtio/adk/batteries/interfaces/IsolatedServiceSpec) maps to — `.api`
  on the `IsolatedService` returned by `createIsolatedService`. Every declared
  method becomes an async function returning `Promise<R>` and accepting an
  optional trailing `AbortSignal` (accepted uniformly regardless of whether the
  method declared `{ signal: true }` — a signal handed to a method that didn't
  opt in is simply not forwarded to the guest). Every declared stream becomes a
  synchronous function returning a `ReadableStream<D>` immediately.
---

# Type Alias: IsolatedFacade\<S>

```ts
type IsolatedFacade<S> = {
  [K in keyof S["methods"]]: (
    args: [...MethodArgs<S["methods"][K]>, signal?: AbortSignal],
  ) => Promise<MethodResult<S["methods"][K]>>;
} & {
  [K in keyof S["streams"]]: (
    args: StreamArgs<S["streams"][K]>,
  ) => ReadableStream<StreamDelta<S["streams"][K]>>;
};
```

Defined in: [src/batteries/isolation/types.ts:253](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/isolation/types.ts#L253)

The host-side callable facade a [IsolatedServiceSpec](../interfaces/IsolatedServiceSpec.md) maps to — `.api` on the
`IsolatedService` returned by `createIsolatedService`. Every declared method becomes an async
function returning `Promise<R>` and accepting an optional trailing `AbortSignal` (accepted uniformly
regardless of whether the method declared `{ signal: true }` — a signal handed to a method that
didn't opt in is simply not forwarded to the guest). Every declared stream becomes a synchronous
function returning a `ReadableStream<D>` immediately.

## Type Parameters

| Type Parameter                                                              |
| --------------------------------------------------------------------------- |
| `S` *extends* [`IsolatedServiceSpec`](../interfaces/IsolatedServiceSpec.md) |