function downloadFile(url, filename) {
	axios.get(url, { responseType: 'arraybuffer' }).then(res => {
		let data = btoa(new Uint8Array(res.data).reduce((data, byte) => data + String.fromCharCode(byte), ''))
		cep.fs.writeFile(filename, data, this.cep.encoding.Base64)
	})
}