rotp VS Grape

Your authentication mechanism should include multiple factors, something the user knows and something the user has. If you are using Devise, you can use the devise-two-factor gem. If you have custom authentication, you can use the rotp gem to generate OTP codes and verify those during login.

Aside from SMS scams, SMS is the least secure type of 2FA. I recommend implementing OTP via authenticator apps like Authenticator and 1Password. You can use the rotp gem for this: https://github.com/mdp/rotp

What you're describing sounds a lot like OTP https://github.com/mdp/rotp. It's a well known and standard way of issuing one time passwords (typically 6 digits that a user confirms by entering it in).

rotp: https://github.com/mdp/rotp and

Use https://github.com/mdp/rotp/ -- it's super simple to get TOTP 2FA set up. Friends don't let friends use SMS 2FA.

ROTP (The Ruby One Time Password Library) is a Ruby library for generating and validating one time passwords (HOTP & TOTP) according to RFC 4226 and RFC 6238. It is compatible with Google Authenticator available for Android and iPhone and any other TOTP based implementations. 1,217 stars by now

Grape’s support extends to standard conventions, multiple format support, content negotiation, versioning, etc. The complete guide to Grape to develop REST-APIs, test the API and analyze the performance metrics is available on its official GitHub page.

Grape (ruby-grape.org)

I'm very ambivalent about Grape, but this very much reminds me of something I do really like about it: the param validation. https://github.com/ruby-grape/grape#parameters

I am currently working on developing and api using grape and devise jwt for user user authentication.

Your RN app will be making http requests to your server, so it doesn't really matter what backend language/framework you use. If your React work was also utilizing http requests to fetch data, then there shouldn't be much of a difference. If your backend is a simple JSON api, checkout Grape. You can tack it on to any existing Rails app.

I've benchmarked Grape with YJIT and without it (if want to see the code, visit repo)

Grape is a REST-like microframework written in Ruby programming language. Grape is also considered among the best ruby frameworks and can be used to run on top of Rack or can be used to complement the existing web application frameworks such as Sinatra or Rails. The latter can be done through the DSL-based REST-API for communication. The Grape ruby web framework facilitates efficient and meaningful APIs working in the web application domain.

Take a look at Grape - https://github.com/ruby-grape/grape

I love the Grape gem for building APIs - might be worth considering if you are building something new: https://github.com/ruby-grape/grape

Grape is a REST-like API framework for Ruby. It’s designed to run on Rack or complement existing web application frameworks such as Rails and Sinatra by providing a simple DSL to easily develop RESTful APIs. 9,200 stars by now