<form class="form" id="cancelchallenge" method="POST" action="{{action('ChallengeController@cancelChallenge')}}">
<input type="hidden" name="cancel_challengeid" value="462f2e80-8012-11e9-8b02-65a0a3459d7a">
<button type="button" class="btn-submit-cancelchallenge">cancel challenge</button>
</form>

<form class="form" id="cancelchallenge" method="POST" action="{{action('ChallengeController@cancelChallenge')}}">
<input type="hidden" name="cancel_challengeid" value="9b9ef9d0-8012-11e9-aa0f-95ff09733e52">
<button type="button" class="btn-submit-cancelchallenge">cancel challenge</button>
</form>

$.ajaxSetup({
    headers: {
        'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
    }
});

$(".btn-submit-cancelchallenge").click(function(e){e.preventDefault();

    var $form = $('#cancelchallenge');
    var cancel_challengeid = $("input[name=cancel_challengeid]").val();

    $.ajax({
        type:'POST',
    url: $form.attr('action'),
    data:{cancel_challengeid:cancel_challengeid},

    success:function(data){
        if(data.successful) {
            toastr.success(data.successful);
        }
    }
    });

});

Route::post('cancelChallenge', 'ChallengeController@cancelChallenge');

public function cancelChallenge(Request $request)
    {
        //Some validation
        $challenge = Challenge::where(['id' => $request->cancel_challengeid,
        'player1' => Auth::user()->id])->first();
        //DB::beginTransaction();
        //Update a row in the challenges table
        //Insert a row into the transactions table
        //Update a row in the users table
        //Commit transaction
    }