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# useMorphoBlueSingleton

Reads the Morpho Blue singleton a MorphoBlueVehicleFactory accepts, as a TanStack Query result.

`spawn` reverts `InvalidMorpho` unless its `morpho` argument matches this.

## Import

```ts
import { useMorphoBlueSingleton } from '@railnetorg/railnet-sdk/react'
```

## Usage

```tsx
import { useMorphoBlueSingleton } from '@railnetorg/railnet-sdk/react'

const { data: morpho } = useMorphoBlueSingleton({ factory: morphoBlueVehicleFactory })
```

## Returns

A TanStack Query result over `Address`, with its `queryKey` attached. See
[`getMorphoBlueSingleton`](/actions/buildSpawnMorphoBlueVehicleCall#getmorphobluesingleton).

## Parameters

Everything [`getMorphoBlueSingleton`](/actions/buildSpawnMorphoBlueVehicleCall#getmorphobluesingleton) takes, plus:

### chainId (optional)

* **Type:** `number`
* **Default:** the connected chain

### enabled (optional)

* **Type:** `boolean`
* **Default:** `true`

## Query options

[`morphoBlueSingletonQueryOptions`](/react/queryOptions) is this read as TanStack Query options, with
`morphoBlueSingletonQueryKey` and `morphoBlueSingletonQueryPrefix` for invalidation.