invoiceninja/resources/views/portal/ninja2020/quotes/includes/actions.blade.php

<form action="{{ route('client.quotes.bulk') }}" method="post" id="approve-form" />
    @csrf
    <input type="hidden" name="action" value="approve">
    <input type="hidden" name="process" value="true">
    <input type="hidden" name="quotes[]" value="{{ $quote->hashed_id }}">
    <input type="hidden" name="signature">

    <div class="bg-white shadow sm:rounded-lg">
        <div class="px-4 py-5 sm:p-6">
            <div class="sm:flex sm:items-start sm:justify-between">
                <h3 class="text-lg leading-6 font-medium text-gray-900">
                    {{ ctrans('texts.approve') }}
                </h3>

                <div class="mt-5 sm:mt-0 sm:ml-6 sm:flex-shrink-0 sm:flex sm:items-center">
                    @yield('quote-not-approved-right-side')

                    <div class="inline-flex rounded-md shadow-sm">
                        <input type="hidden" name="action" value="payment">
                        <button type="button" class="button button-primary bg-primary" id="approve-button">{{ ctrans('texts.approve') }}</button>
                    </div>
                </div>
            </div>
        </div>
    </div>
</form>