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Dala is a native mobile framework for Elixir powered by the BEAM VM. Build iOS and Android apps with OTP, lightweight processes, fault tolerance, AI/ML.

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dala lib dala hardware biometric.ex
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lib/dala/hardware/biometric.ex 

defmodule Dala.Hardware.Biometric do

  @compile {:nowarn_undefined, [:Nx]}

  @moduledoc """

  Biometric authentication (Face ID / Touch ID / fingerprint).



  No permission dialog is shown — uses the device's existing biometric enrollment.



      Dala.Biometric.authenticate(socket, reason: "Confirm payment")



  Result arrives as:



      handle_info({:biometric, :success},       socket)

      handle_info({:biometric, :failure},        socket)

      handle_info({:biometric, :not_available},  socket)



  `:not_available` is returned if the device has no biometric hardware or the

  user has not enrolled any biometrics.



  iOS: `LAContext.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, ...)`

  Android: `BiometricPrompt`

  """



  @spec authenticate(Dala.Socket.t(), keyword()) :: Dala.Socket.t()

  def authenticate(socket, opts \\ []) do

    reason = Keyword.get(opts, :reason, "Authenticate")

    Dala.Platform.Native.biometric_authenticate(reason)

    socket

  end

end