Integrating Twilio Verification SDK for Android using your own backend

Once you integrated the Twilio Verification SDK for Android in your app using the sample backend, you can move forward and implement the token service in your own backend.

In order for you to allow devices to start verifications, you will need to provide a JWT to the devices.

The only functionality that your server needs to provide is a transformation of the user phone number into a signed JWT.

Here's a ruby/sinatra example

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require 'jwt'
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post "/verify/token" do
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  param :phone_number, String, required: true
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  payload = {
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    app_id: ENV["APP_ID"],
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    phone_number: params[:phone_number],
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    iat: Time.now.to_i
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  }
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  jwt_token = JWT.encode(payload, ENV["AUTHY_API_KEY"], "HS256")
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  respond_with status: 200, body: {jwt_token: jwt_token}
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end

For more information and a working example, please refer to the Sample Backend in github

This is the full list of parameters that can be crafted inside the JWT payload