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Si è verificato un errore nell'elaborarazione del modello. 
The following has evaluated to null or missing:
==> themeDisplay.getThemeSetting("news-vocabulary-id")  [in template "51632#51678#43587" at line 22, column 20]

----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: vocabularyId = themeDisplay.getThemeS...  [in template "51632#51678#43587" at line 22, column 5]
----
1<#--sella social macro --> 
2<#include "${templatesPath}/SOCIAL-SHARE-MACRO" /> 
3 
4<#assign originalLocale = locale> 
5<#setting locale = 'en_US'> 
6<#assign date = .vars['reserved-article-display-date'].data/> 
7<#assign date = date?datetime("EEE, d MMM yyyy HH:mm:ss Z") /> 
8<#setting locale = originalLocale> 
9<#assign dateTimeFormat = languageUtil.get(locale, "HH:mm, dd MMM yyyy")> 
10 
11 
12<#assign 
13    articleId = .vars['reserved-article-id'].data 
14    journalService = serviceLocator.findService("com.liferay.journal.service.JournalArticleLocalService") 
15    assetEntryService = serviceLocator.findService("com.liferay.asset.kernel.service.AssetEntryLocalService") 
16    ja = journalService.fetchLatestArticle(themeDisplay.getScopeGroupId(), articleId, 0) 
17    ae = assetEntryService.fetchEntry("com.liferay.journal.model.JournalArticle", ja.getResourcePrimKey()) 
18    title = .vars['reserved-article-title'].data 
19    jaAbstract = .vars['reserved-article-description'].data 
20    absoluteURL = themeDisplay.getPortalURL() + themeDisplay.getURLCurrent() 
21    altBigDetailImage = "" 
22    vocabularyId = themeDisplay.getThemeSetting("news-vocabulary-id")?number 
23    category = sella_tool.getCategoryFromVocabularyId(ae.getCategories(), vocabularyId, locale) 
24/> 
25 
26<#if !vocabularyIdLive?? && !themeDisplay.getThemeSetting("news-vocabulary-id-live")?? > 
27    <#assign vocabularyIdLive = 52307 /> 
28<#else> 
29    <#assign vocabularyIdLive = themeDisplay.getThemeSetting("news-vocabulary-id-live")?number /> 
30</#if> 
31 
32<#if category==""> 
33    <#assign category = sella_tool.getCategoryFromVocabularyId(ae.getCategories(), vocabularyIdLive , locale)  /> 
34</#if> 
35 
36<#-- ja title --> 
37<#if titleShown?? && titleShown.getData()?has_content> 
38    <#assign title = titleShown.getData() /> 
39</#if> 
40 
41<#if HeroImage.getAttribute("fileEntryId")?? > 
42    <#assign socialImg = themeDisplay.getPortalURL() + sella_tool.getAdaptiveMediaSrc("800-x-533-px",HeroImage.getAttribute("fileEntryId")?number,HeroImage.name) /> 
43<#else> 
44    <#assign socialImg = ""> 
45</#if> 
46 
47<@shareContent title="${title}" summary="${jaAbstract}" detailURL="${absoluteURL}" imageURL="${socialImg}"/> 
48 
49 
50 
51<article class="article-detail article-detail--has-img"> 
52  <#-- Info + Social --> 
53  <div class="container"> 
54    <div class="row"> 
55      <div class="col-md-10 offset-md-1"> 
56        <div class="article-detail__intro"> 
57          <div class="row"> 
58            <div class="col-lg-8"> 
59              <#-- Categoria e data --> 
60              <div class="d-flex"> 
61                <#if category?? && category?has_content> 
62                  <div class="article-detail__category">${category}</div> 
63                </#if> 
64                <div class="article-detail__date">${date?string(dateTimeFormat)}</div> 
65              </div> 
66              <#-- Titolo --> 
67              <h1 class="article-detail__title">${title}</h1> 
68              <#-- Sottotitolo --> 
69              <#if jaAbstract?has_content> 
70                <h2 class="article-detail__subject">${jaAbstract}</h2> 
71              </#if> 
72 
73            </div> 
74          </div> 
75          <div class="row"> 
76            <div class="col-12"> 
77              <div class="article-detail__button d-flex"> 
78                <#-- Share button --> 
79                <div class="sella-share clearfix"> 
80                  <div class="sella-share__icon sella-share__icon--share"> 
81                    <svg class="ico-svg"> 
82                      <use xlink:href="${themeDisplay.getPathThemeImages()}/assets/images/icons.svg#share-alt"></use> 
83                    </svg> 
84                  </div> 
85                  <div class="sella-share__text">Condividi</div> 
86                  <ul> 
87                    <li> 
88                      <a href="http://www.facebook.com/sharer.php?u=${absoluteURL}" title="Facebook" class="sella-share__icon sella-share__icon--fb"> 
89                        <svg class="ico-svg"> 
90                          <use xlink:href="${themeDisplay.getPathThemeImages()}/assets/images/icons.svg#facebook-f"></use> 
91                        </svg> 
92                      </a> 
93                    </li> 
94                    <li> 
95                      <a href="https://twitter.com/home?status=${absoluteURL}" title="Twitter" class="sella-share__icon sella-share__icon--twitter"> 
96                        <svg class="ico-svg"> 
97                          <use xlink:href="${themeDisplay.getPathThemeImages()}/assets/images/icons.svg#twitter"></use> 
98                        </svg> 
99                      </a> 
100                    </li> 
101                    <li> 
102						<#assign escapedTitle = htmlUtil.escape(htmlParserUtil.extractText(title)) /> 
103						<#assign escapedAbstract = htmlUtil.escape(htmlParserUtil.extractText(jaAbstract)) /> 
104 
105                      	<a href="http://www.linkedin.com/shareArticle?mini=true&amp;url=${absoluteURL}&amp;title=${escapedTitle}&amp;summary=${escapedAbstract}&amp;source=" title="LinkedIn" class="sella-share__icon sella-share__icon--linkedin"> 
106                        	<svg class="ico-svg"> 
107                          		<use xlink:href="${themeDisplay.getPathThemeImages()}/assets/images/icons.svg#linkedin-in"></use> 
108                        	</svg> 
109                      	</a> 
110                    </li> 
111                     <li> 
112                      <a href="https://api.whatsapp.com/send?text=${urlCodec.encodeURL(absoluteURL)}" title="WahtsApp" class="sella-share__icon sella-share__icon--whatsapp"> 
113                        <svg class="ico-svg"> 
114                          <use xlink:href="${themeDisplay.getPathThemeImages()}/assets/images/icons.svg#whatsapp"></use> 
115                        </svg> 
116                      </a> 
117                    </li> 
118                  </ul> 
119                </div> 
120              </div> 
121            </div> 
122          </div> 
123        </div> 
124      </div> 
125    </div> 
126  </div> 
127 
128 
129<#if HeroImage?? && HeroImage.getData() != ""> 
130    <#assign altBigDetailImage = HeroImage.getAttribute("alt") /> 
131    <#assign urlBigDetailImage = HeroImage.getData() /> 
132</#if> 
133<#if urlBigDetailImage?? && urlBigDetailImage?has_content> 
134    <div class="sella-container sella-container--only-img"> 
135        <div class="container-fluid"> 
136 
137        <#-- VIDEO --> 
138            <div class="row"> 
139                <div class="col-lg-10 offset-lg-1"> 
140                    <#if Video?? && Video?has_content > 
141                        <#if Video.getData()?? && Video.getData() != ""> 
142                            <#if Video.getData()?contains("vimeo")> 
143                                <#if HeroImage.getAttribute("fileEntryId")?? > 
144                                    <#assign HeroImage800x533 = sella_tool.getAdaptiveMediaSrc("800-x-533-px",HeroImage.getAttribute("fileEntryId")?number,HeroImage.name) /> 
145                                <#else> 
146                                    <#assign HeroImage800x533 = ""> 
147                                </#if> 
148                                <video width="100%" controls="" poster="${HeroImage800x533}"> 
149                                    <source src ="${Video.getData()}" type="video/mp4"> 
150                                </video> 
151                            <#else> 
152                                <iframe width="100%" height="350px" src="${Video.getData()}?controls=0" ></iframe> 
153                            </#if> 
154                        <#else> 
155                            <#if HeroImage?? && HeroImage?has_content > 
156                                <#if HeroImage.getData()?? && HeroImage.getData() != ""> 
157                                    <#if HeroImage.getAttribute("fileEntryId")?? > 
158                                        <#assign HeroImage800x533 = sella_tool.getAdaptiveMediaSrc("800-x-533-px",HeroImage.getAttribute("fileEntryId")?number,HeroImage.name) /> 
159                                        <figure class="article-detail__fig"> 
160                                        <img class="article-detail__img w-100" src="${HeroImage800x533}" alt="${HeroImage.getAttribute("alt")}"> 
161                                            <#if ImageOwner.getData()?? && ImageOwner.getData()!="" && HeroImage.getAttribute("alt") != "" > 
162                                                <figcaption class="article-detail__figcaption">${HeroImage.getAttribute("alt")} - <strong>${ImageOwner.getData()}</strong></figcaption> 
163                                            <#else> 
164                                                <figcaption class="article-detail__figcaption">${HeroImage.getAttribute("alt")} - <strong>${ImageOwner.getData()}</strong></figcaption> 
165                                            </#if> 
166                                        </figure> 
167                                    </#if> 
168                                </#if> 
169                            </#if> 
170                        </#if> 
171                    </#if> 
172                </div> 
173            </div> 
174        </div> 
175    </div> 
176</#if> 
177 
178<#-- testo --> 
179<#if Body?? && Body.getData()?has_content> 
180    <div class="container"> 
181        <div class="row"> 
182            <div class="col-md-8 offset-md-2 col-xl-6 offset-xl-3"> 
183                <div class="article-detail__text"> 
184                    ${Body.getData()} 
185                </div> 
186            </div> 
187        </div> 
188    </div> 
189</#if> 
190 
191<div class="article-detail__slider"> 
192    <div class="container"> 
193        <div class="row"> 
194            <div class="col-12"> 
195                <div class="slider slider-detail"> 
196                    <#if GalleryImage?has_content && GalleryImage??> 
197                        <#if GalleryImage.getData()?? && GalleryImage.getData() != ""  > 
198                            <#list GalleryImage.getSiblings() as curImage> 
199                                <#if curImage.getAttribute("fileEntryId")?? > 
200                                    <#assign curGalleryImage800x533 = sella_tool.getAdaptiveMediaSrc("800-x-533-px",curImage.getAttribute("fileEntryId")?number,curImage.name) /> 
201                                    <div> 
202                                            <div class="article-detail__gallery"> 
203                                            <a href="${curGalleryImage800x533}" title="${curImage.getAttribute("alt")}"> 
204                                                <img src="${curGalleryImage800x533}" alt="${curImage.getAttribute("alt")}" class="w-100"> 
205                                            </a> 
206                                            <#if curImage.GalleryImageOwner.getData()?? && curImage.GalleryImageOwner.getData()!="" && curImage.getAttribute("alt") != ""  > 
207                                                <div class="article-detail__gallery-caption">${curImage.getAttribute("alt")} - <strong>${curImage.GalleryImageOwner.getData()}</strong></div> 
208                                            </#if> 
209                                        </div> 
210                                    </div> 
211                                </#if> 
212                            </#list> 
213                        </#if> 
214                    </#if> 
215                </div> 
216            </div> 
217        </div> 
218    </div> 
219</div> 
Si è verificato un errore nell'elaborarazione del modello. 
No compatible overloaded variation was found; wrong number of arguments.
The FTL type of the argument values were: extended_hash+string (com.liferay.portal.model.impl.LayoutSetImpl wrapped into f.e.b.StringModel), extended_hash+string (com.liferay.portal.kernel.theme.ThemeDisplay wrapped into f.e.b.StringModel).
The matching overload was searched among these members:
    com.liferay.portal.util.PortalImpl.getGroupFriendlyURL(com.liferay.portal.kernel.model.LayoutSet, com.liferay.portal.kernel.theme.ThemeDisplay, boolean, boolean),
    com.liferay.portal.util.PortalImpl.getGroupFriendlyURL(com.liferay.portal.kernel.model.LayoutSet, com.liferay.portal.kernel.theme.ThemeDisplay, Locale)

----
FTL stack trace ("~" means nesting-related):
	- Failed at: #assign groupPrependURL = portalUtil...  [in template "51632#51678#66308" at line 12, column 1]
----
1<#assign articleId = .vars['reserved-article-id'].data /> 
2<#assign articleGroupId = .vars['articleGroupId'] /> 
3 
4<#assign journalService = serviceLocator.findService("com.liferay.journal.service.JournalArticleLocalService") /> 
5<#assign groupService = serviceLocator.findService("com.liferay.portal.kernel.service.GroupLocalService") /> 
6<#assign layoutSetService = serviceLocator.findService("com.liferay.portal.kernel.service.LayoutSetLocalService") /> 
7 
8<#assign journalArticle = journalService.getLatestArticle(articleGroupId?number,articleId?string,0) /> 
9<#assign urlTitle = journalArticle.getUrlTitle() /> 
10<#assign group = groupService.getGroup(groupId?number) /> 
11<#assign groupFriendlyURL = group.getFriendlyURL() /> 
12<#assign groupPrependURL =  portalUtil.getGroupFriendlyURL(layoutSetService.getLayoutSet(groupId?number, false), themeDisplay) /> 
13 
14<#assign maxSize = 4 /> 
15<#assign radiocorIndex = radiocor_news_tool.getNewsIndex(-1) /> 
16<#assign dateTimeFormat = languageUtil.get(locale, "dd/MM/yyyy HH:mm:ss")> 
17 
18<section class="radiocor-ultime-wrapper"> 
19    <#-- 
20    <h2 class="sella-underlined-title ml-0 mr-0"> 
21        <span>Ultim'ora</span> 
22    </h2> 
23     --> 
24    <div class="radiocor-ultime-content"> 
25		<#--As of avoiding index-out-of-bounds error, in FreeMarker 2.3.21 you can issue listVar[0..*4], 
26		which will slice out 4 items, or less if there's less available.    --> 
27 
28        <#list radiocorIndex[0..*maxSize] as r> 
29				<div class="lx-latest-news-item"> 
30					<div class="lx-latest-news-item-text"> 
31						<h3><a href="${groupPrependURL}/radiocor/notizia/?nid=${r.id}">${r.headLine}</a></h3> 
32						<span>${r.date?string(dateTimeFormat)!""}</span> 
33					</div> 
34					<div class="lx-clear-fix"></div> 
35				</div> 
36        </#list> 
37    </div> 
38 
39    <p> 
40        <a href="${groupPrependURL}/radiocor/" class="radiocor-read-more font-weight-bold">${languageUtil.get(locale,"radiocor-read-more")}</a> 
41    </p> 
42 
43</section> 
Si è verificato un errore nell'elaborarazione del modello. 
The following has evaluated to null or missing:
==> httpUtil.getParameter  [in template "51632#51678#52245" at line 6, column 38]

----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: #assign debug = validator.isNotNull(h...  [in template "51632#51678#52245" at line 6, column 1]
----
1<#--Inclusione delle MACRO  --> 
2<#include "${templatesPath}/SELLA-MACRO" /> 
3<#include "${templatesPath}/ADAPTIVE-IMAGE-MACRO" /> 
4 
5<#-- ##################################### DEBUG ################################### --> 
6<#assign debug = validator.isNotNull(httpUtil.getParameter(current_url,"sellaDebug",false)) /> 
7<#if debug > 
8    <div class="debug-content right"> 
9        TPL: REVIEW ADT 
10    </div> 
11</#if> 
12 
13<section class="review-adt-wrapper"> 
14    <div class="container"> 
15        <div class="review-adt-container"> 
16 
17            <#if entries?has_content> 
18 
19                <div class="review-adt-container-content"> 
20 
21                    <#list entries as curEntry> 
22 
23                        <#assign assetRenderer = curEntry.getAssetRenderer() /> 
24                        <#assign classPK = curEntry.getClassPK() /> 
25                        <#assign review = adt_tool.getFreemarkerMap(classPK, locale) /> 
26                        <#assign journalArticle = curEntry.getAssetRenderer().getAssetObject() /> 
27 
28                        <#assign customTitle = ""/> 
29                        <#if review.CustomTitle??> 
30                                <#assign customTitle = review.CustomTitle.value /> 
31                            </#if> 
32 
33                        <@getEditIcon /> 
34 
35                        <#if review.Cover??> 
36                            <#assign cover = review.Cover.value /> 
37                        </#if> 
38                        <#assign reviewTitle = curEntry.getTitle(locale) /> 
39                        <#assign abstract = curEntry.getSummary(locale) /> 
40 
41                        <div class="row"> 
42                          <div class="review-adt-img col-sm-5 pr-md-0"> 
43                            <a data-senna-off="true" href="${getDisplayPageURL(classPK, groupId)}"> 
44                                <div class="mb-2"> 
45                                    <img class="w-100" src="${cover.url}" > 
46                                </div> 
47                            </a> 
48                          </div> 
49                          <div class="review-adt-text col-sm-7"> 
50                            <h3> 
51                              <a data-senna-off="true" href="${getDisplayPageURL(classPK,groupId)}"> 
52                                <#if customTitle?? && customTitle?has_content> 
53                                        ${customTitle} 
54                                    <#else> 
55                                        ${reviewTitle} 
56                                    </#if> 
57                              </a> 
58                            </h3> 
59                            <div class="review-adt-abstract">${abstract}</div> 
60                          </div> 
61                        </div> 
62 
63                    </#list> 
64 
65                </div> 
66            </#if> 
67 
68        </div> 
69    </div> 
70</section> 
71 
72 
73<#macro getEditIcon> 
74    <#if assetRenderer.hasEditPermission(themeDisplay.getPermissionChecker())> 
75        <#assign redirectURL = renderResponse.createRenderURL() /> 
76 
77        ${redirectURL.setParameter("mvcPath", "/add_asset_redirect.jsp")} 
78        ${redirectURL.setWindowState("pop_up")} 
79 
80        <#assign editPortletURL = assetRenderer.getURLEdit(renderRequest, renderResponse, windowStateFactory.getWindowState("pop_up"), redirectURL)!"" /> 
81 
82        <#if validator.isNotNull(editPortletURL)> 
83            <#assign title = languageUtil.format(locale, "edit-x", entryTitle, false) /> 
84 
85            <@liferay_ui["icon"] 
86                cssClass="icon-monospaced visible-interaction" 
87                icon="pencil" 
88                markupView="lexicon" 
89                message=title 
90                url="javascript:Liferay.Util.openWindow({id:'" + renderResponse.getNamespace() + "editAsset', title: '" + title + "', uri:'" + htmlUtil.escapeURL(editPortletURL.toString()) + "'});" 
91            /> 
92        </#if> 
93    </#if> 
94</#macro> 

Indietro Next, Voci dal futuro | La blockchain: un registro aperto e sempre accessibile

Scenari
Finanza & Investimenti

Next, Voices from the Future | The blockchain: an open and always accessible ledger

After the summer break, the format "Next – Voices from the Future" resumes, taking us on a journey into the world of innovation. In this new post by Mico Curatolo from Banca Sella's Innovation Area, we will explore how to search for information and transactions on the blockchain together.
Next, Voci dal futuro | La blockchain: un registro aperto e sempre accessibile
Getty Images
04 Sep 24
#blockchain

As we have previously discussed, the blockchain was created as a technology designed to ensure privacy and security while maintaining maximum transparency for anyone who wants to interact with it. In fact, every transaction recorded on a public blockchain is visible to anyone, at any time. Today, we will focus on the concept of traceability and ease of search, learning just how easy and immediate it is to search for a transaction and all the elements that comprise it within a blockchain.
There are several reasons why someone might want to search for transactions on the blockchain:

1.    Transparency and Trust: Transparency is one of the main attractions of the blockchain. Anyone can verify a transaction without the need for intermediaries, which increases trust between the involved parties.
2.    Audit and Traceability: Companies and institutions can use the blockchain to audit their activities. Every transaction is immutable and traceable, making the verification process much simpler and more secure.
3.    Security: Transactions are recorded in a decentralized and immutable way, making it very difficult for malicious actors to alter the information. Searching for and verifying transactions can also help identify and prevent fraudulent activities.
4.    Financial Analysis: Having access to all transactions facilitates financial analysis and the monitoring of money flows, helping to understand economic trends and market behaviors. The blockchain provides a wealth of valuable data for this type of analysis, supporting both corporate finance and market analysis.


Using a blockchain explorer – a tool for conducting on-chain searches – you can obtain various information related to a specific transaction, such as:

•    Addresses: All addresses connected to the transaction, from the wallet that initiated the operation to the recipient, and even the Smart Contract.
•    Assets: The amount of assets and values contained in the transaction.
•    Gas Fee: The amount of fees paid. The gas fee is like a "tip" given to validators to process the transaction on the blockchain.
•    Timestamp: The numeric value indicating the date and time when a transaction was added to the blockchain. It is used to ensure that transactions are added to the blockchain in chronological order.
•    Transaction Hash: The unique value that identifies each transaction.
•    Token: A special coin or digital object that is transferred in the transaction.
•    Signatures: The signatures used to guarantee the authenticity of the transaction.
•    Block: The block in the chain where a certain transaction has been confirmed.


Getting practical, let's see what is needed to search for a transaction, a wallet, a block, or any other element on the blockchain. First of all, we must decide which blockchain to search on. For Ethereum, we will use Etherscan, while for Bitcoin, we will look inside the mempool.
For example, using the Ethereum block explorer, we can enter a wallet, a transaction, a block, a token, or a .ens domain (we will discuss this in a dedicated article) into the search bar to search on the blockchain.

 
In this case, we will search for the wallet 0x4675C7e5BaAFBFFbca748158bEcBA61ef3b0a263 (randomly selected from the latest transactions reported by the explorer at the time of writing this article), and the screen that will appear is as follows:

 

 
As mentioned earlier, you can see the various information recorded here, such as:
•    ETH Balance: The amount of Ethereum's native digital currency, Ether, held by the wallet.
•    ETH Value: The equivalent value in dollars.
•    Token Holdings: The tokens held by the wallet, other than ETH.
•    Last TXN Sent and First TXN Sent: The last and first transactions sent. These two data points (particularly the second) are interesting for calculating how long the wallet has been active in the market, thus understanding its longevity.
•    Number of Transactions Performed: As reported in the list below.

When we say that the blockchain is transparent, we mean that today, anyone can consult it in every aspect, understanding how transactions, wallets, and accounts are interconnected. However, there are cases where it is not possible to see these interactions. For example, transactions conducted on private blockchains are impossible to search for and find unless one has access to the specific ledger.

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