Saving pdf

    $fit = true;
    $path = base_path().'/public';
    $file = $path .'/forms/doc-27.pdf';

    $docDeal = str_replace(' ', '-', strtolower($deal->name));
    $docInvestor = str_replace(' ', '-', strtolower($user->name));
    $date = date('m-d-Y');
    $signature = base64_decode(preg_replace('#^data:image/\w+;base64,#i', '', $request->base64_signature));


    // Set Writer
    $tempWriter = new SetaPDF_Core_Writer_TempFile();
    $tempWriter->setTempDir($path .'/forms/temp/');
    $tempWriter->setKeepFile(true);

    // Create Doc
		$document = SetaPDF_Core_Document::loadByFilename($file, $tempWriter);

		// Set Fields
		$formFiller = new SetaPDF_FormFiller($document);
		$fields = $formFiller->getFields();
		$fields['Name']->setValue($user->name); // add some randomness

		// Handle Signature		
		$image = SetaPDF_Core_Image::get(new SetaPDF_Core_Reader_String($signature))->toXObject($document);
		$sigField = $fields['Investor Signature']->getAnnotation();
		$width = $sigField ->getWidth();
		$height = $sigField ->getHeight();
		$xobject = SetaPDF_Core_XObject_Form::create($document, array(0, 0, $width, $height));
		$canvas = $xobject->getCanvas();
		if ($fit == true) {
		    if ($image->getHeight($width) >= $height) {
		        $image->draw($canvas, $width / 2 - $image->getWidth($height) / 2, 0, null, $height);
		    } else {
		        $image->draw($canvas, 0, $height / 2 - $image->getHeight($width) / 2, $width);
		    }
		} else {
		    $imageWidth = 100;
		    $image->draw($canvas, 0, $height/2 - $image->getHeight($imageWidth)/2, $imageWidth);
		}
		$sigField->setAppearance($xobject);

		// 
		$document->save()->finish();


    // Upload PDF to s3
    $disk = Storage::disk('s3');
    $filePath = $disk->put('investment-docs/'. $docDeal .'-'.$docInvestor .'-'. $date .'.pdf',$tempWriter->getPath(), 'private');