-record(data_provider, {
    create_nonce :: fun(() -> {ok, lightbulb@nonce:nonce()} | {error, binary()}),
    validate_nonce :: fun((binary()) -> {ok, nil} | {error, binary()}),
    get_registration :: fun((binary(), binary()) -> {ok,
            lightbulb@registration:registration()} |
        {error, binary()}),
    get_deployment :: fun((binary(), binary(), binary()) -> {ok,
            lightbulb@deployment:deployment()} |
        {error, binary()}),
    get_active_jwk :: fun(() -> {ok, lightbulb@jwk:jwk()} | {error, binary()})
}).