October 28, 2021 12 min read

We look at how to create a login process using MetaMask to sign data with a private key for an Ethereum address, and use that to authenticate with Firebase using a Custom Auth Token.

October 05, 2021 7 min read

In this tutorial, we cover how to use the shareReplay operator from RxJS to cut down on the number of documents we need to read from Firestore

August 20, 2021 11 min read

In this tutorial, we walk through how to write unit tests for Firestore security rules locally and test them using the emulator

October 20, 2020 4 min read

In this tutorial, we discuss how the HTML file input element works on iOS and Android

October 20, 2020 2 min read

In this tutorial, we will investigate how to access a server running locally on a computer from a native application running on iOS or Android.

October 13, 2020 7 min read

In this tutorial, we will walk through how to upload files from an Ionic application to a backend Node/Express server using multer

October 13, 2020 2 min read

In this tutorial, we will build a backend with NestJS that can handle uploading files that are sent to it.