> For the complete documentation index, see [llms.txt](https://expresso.masb0ymas.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://expresso.masb0ymas.com/expresso-library/expresso-provider/fcm.md).

# FCM

{% hint style="info" %}
FCM Provider from expresso-provider
{% endhint %}

{% embed url="<https://www.npmjs.com/package/firebase-admin>" %}
firebase admin to provider FCM
{% endembed %}

Using commonjs

```javascript
const { FCM } = require('expresso-provider')
```

Using ES6

```javascript
import { FCM } from 'expresso-provider'
```

***

### Initialize FCM

```javascript
// config/fcm.ts

import { FCM } from 'expresso-provider'
import * as admin from 'firebase-admin'
import path from 'path'

const serviceAccountPath = path.resolve(
  `${process.cwd()}/public/gcp/fcm_serviceAccount.json`
)

export const fcmService = new FCM({
  options: { credential: admin.credential.cert(serviceAccountPath) },
})

fcmService.initialize()
```

***

### FCM Send To Device

```javascript
import { fcmService } from 'config/fcm'

const payload = {
    'text': 'any value'
}

const dataFcm = await fcmService.sendToDevice({
    appName: 'My App',
    title: 'Your App Notif',
    deviceTokens: ['device_token_1', 'device_token_2'],
    message: 'Welcome to my App',
    type: 'Notif',
    data: JSON.stringify(payload),
})

console.log({ dataFcm })
```