wp-calypso/client/dashboard/data/site-media-storage.ts

import wpcom from 'calypso/lib/wp';

export interface SiteMediaStorage {
	max_storage_bytes_from_add_ons: number;
	max_storage_bytes: number;
	storage_used_bytes: number;
}

export async function fetchSiteMediaStorage( siteId: number ): Promise< SiteMediaStorage > {
	const mediaStorage = await wpcom.req.get( `/sites/${ siteId }/media-storage` );
	return {
		max_storage_bytes_from_add_ons: Number( mediaStorage.max_storage_bytes_from_add_ons ),
		max_storage_bytes: Number( mediaStorage.max_storage_bytes ),
		storage_used_bytes: Number( mediaStorage.storage_used_bytes ),
	};
}