bagaimana membuat logika ini?

Saya diberi tugas membuat tombol yang diklik berubah menjadi tanda tangan digital berupa barcode dengan mengambil qr code API, tapi saya kesulitan membuat logikanya. Ada yang bisa bantu saya?

**code di index.blade**

 <table id="table" class="table">
                    <thead>
                        <tr>
                        <th>No</th>
                        <th>No. Dokumen
                            <th>Pemberi sampel
                            <th>Parameter Pengujian
                            <th>Tanggal terima sampel
                            <th>Jumlah sampel
                            <th>Tanggal uji
                            <th>Tanggal  selesai uji
                            <th>Sampel
                            <th>Parameter dan Nilai Uji
                            <th>Spesifikasi
                            <th>Keterangan
                            <th>Tanda Tangan Operator
                            <th>Tanda Tangan Staff
                            <th>Tanda Tangan Supervisor
                        <th width="280px">Action</th>
                        </tr>
                    </thead>
                    @foreach($operators as $key => $operator)
                    <tbody>
                        <tr>
                            <td>{{ $i++ }}</td>
                            <td>{{ $operator-> document_no}}</td>
                            <td>{{ $operator-> sampler}}</td>
                            <td>{{ $operator-> testing_parameter}}</td>
                            <td>{{ $operator-> recieved_date}}</td>
                            <td>{{ $operator-> sample_count}}</td>
                            <td>{{ $operator-> test_start_date}}</td>
                            <td>{{ $operator-> test_end_date}}</td>
                            <td>{{ $operator-> sample_no}}</td>
                            <td>{{ $operator-> parameter_and_values}}</td>
                            <td>{{ $operator-> specification}}</td>
                            <td>{{ $operator-> note}}</td>
                            @if (isset($operator->ttd_operator))
                            <td><img src ="https://chart.googleapis.com/chart?chd=h&chs=70x70&cht=qr&chl={{ $operator-> ttd_operator}}"></td>
                            @else
                            <td> <a href="{{route('ttdOperator')}}" class="btn btn-warning">TTD</a></td>
                            @endif

**code di controller**

 public function ttd_operator($id)
    {
        $operators = Operator::find($id);

        // // $operator->ttd_operator= 1cre;
        //Operator::where('id',$id)->update([

        // $operator->ttd_operator();

        //return view('welcome');

        return redirect()->route('operators.index')
        ->with('success', 'Berhasil ttd!');
    }

**code di route**

//ttdOp
Route::get('/ttdOperator','OperatorController@ttd_operator')->name('ttdOperator');
// Op
Route::group(['middleware' => ['auth.users', 'operator'], 'prefix' => 'operators'], function() {

    // Dashboard Op
    Route::get('/', 'OperatorController@Home')->name('home');
    // Management Op
    Route::post('/add', 'OperatorController@Store');
    Route::get('/edit/{id}', 'OperatorController@edit');
    Route::put('/edit/{id}', 'OperatorController@Update');
    Route::delete('/delete/{id}', 'OperatorController@Delete')->name('DeleteProcess');
});