fix: handle invalid client tag

packages/app/src/Components/Event/Application.tsx

@@ -0,0 +1,39 @@
+import { mapEventToProfile, TaggedNostrEvent } from "@snort/system";
+import { FormattedMessage } from "react-intl";
+
+import KindName from "../kind-name";
+import Avatar from "../User/Avatar";
+import DisplayName from "../User/DisplayName";
+import ProfileImage from "../User/ProfileImage";
+
+export function ApplicationHandler({ ev }: { ev: TaggedNostrEvent }) {
+  const profile = mapEventToProfile(ev);
+  const kinds = ev.tags
+    .filter(a => a[0] === "k")
+    .map(a => Number(a[1]))
+    .sort((a, b) => a - b);
+  return (
+    <div className="p flex gap-2 flex-col">
+      <div className="flex items-center gap-2 text-xl">
+        <Avatar user={profile} pubkey={""} size={120} />
+        <div className="flex flex-col gap-2">
+          <DisplayName user={profile} pubkey={""} />
+          <div className="text-sm  flex items-center gap-2">
+            <div className="text-gray-light">
+              <FormattedMessage defaultMessage="Published by" />
+            </div>
+            <ProfileImage className="inline" pubkey={ev.pubkey} size={30} link="" />
+          </div>
+        </div>
+      </div>
+      <FormattedMessage defaultMessage="Supported Kinds:" />
+      <div className="flex flex-wrap">
+        {kinds.map(a => (
+          <div key={a} className="pill">
+            <KindName kind={a} />
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}

packages/app/src/Components/Event/EventComponent.tsx

@@ -6,15 +6,15 @@ import { memo, ReactNode } from "react";
 import PubkeyList from "@/Components/Embed/PubkeyList";
 import ZapstrEmbed from "@/Components/Embed/ZapstrEmbed";
 import ErrorBoundary from "@/Components/ErrorBoundary";
+import { ApplicationHandler } from "@/Components/Event/Application";
+import { LongFormText } from "@/Components/Event/LongFormText";
 import { NostrFileElement } from "@/Components/Event/NostrFileHeader";
+import { Note } from "@/Components/Event/Note/Note";
 import NoteReaction from "@/Components/Event/NoteReaction";
 import { ZapGoal } from "@/Components/Event/ZapGoal";
 import { LiveEvent } from "@/Components/LiveStream/LiveEvent";
 import ProfilePreview from "@/Components/User/ProfilePreview";
 
-import { LongFormText } from "./LongFormText";
-import { Note } from "./Note/Note";
-
 export interface NotePropsOptions {
   isRoot?: boolean;
   showHeader?: boolean;
@@ -75,6 +75,10 @@ export default memo(function EventComponent(props: NoteProps) {
     case 9041: // Assuming 9041 is a valid EventKind
       content = <ZapGoal ev={ev} />;
       break;
+    case EventKind.ApplicationHandler: {
+      content = <ApplicationHandler ev={ev} />;
+      break;
+    }
     case EventKind.Photo:
     case EventKind.Video:
     case EventKind.ShortVideo: {

packages/app/src/Components/Event/Note/ClientTag.tsx

@@ -5,7 +5,7 @@ import { Link } from "react-router-dom";
 export function ClientTag({ ev }: { ev: TaggedNostrEvent }) {
   const tag = ev.tags.find(a => a[0] === "client");
   if (!tag) return;
-  const link = tag[2] && tag[2].includes(":") ? NostrLink.fromTag(["a", tag[2]]) : undefined;
+  const link = tag[2] && tag[2].includes(":") ? NostrLink.tryFromTag(["a", tag[2]]) : undefined;
   return (
     <span className="text-xs text-gray-light">
       {" "}

packages/app/src/Components/kind-name.tsx

@@ -1,3 +1,4 @@
+/* eslint-disable max-lines */
 import { FormattedMessage } from "react-intl";
 
 export default function KindName({ kind }: { kind: number }) {
@@ -222,5 +223,9 @@ export default function KindName({ kind }: { kind: number }) {
       return <FormattedMessage defaultMessage="Video View Event" />;
     case 34550:
       return <FormattedMessage defaultMessage="Community Definition" />;
+    case 31337:
+      return <FormattedMessage defaultMessage="Zapstr Track" />;
+    default:
+      return kind;
   }
 }

packages/app/src/Pages/Layout/Header.tsx

@@ -64,7 +64,11 @@ export function Header() {
       </>
     );
   } else if (nostrLink) {
-    if (nostrLink.type === NostrPrefix.Event || nostrLink.type === NostrPrefix.Note) {
+    if (
+      nostrLink.type === NostrPrefix.Event ||
+      nostrLink.type === NostrPrefix.Note ||
+      nostrLink.type === NostrPrefix.Address
+    ) {
       title = <NoteTitle link={nostrLink} />;
     } else if (nostrLink.type === NostrPrefix.PublicKey || nostrLink.type === NostrPrefix.Profile) {
       try {

packages/app/src/lang.json

@@ -270,6 +270,9 @@
   "4emo2p": {
     "defaultMessage": "Missing Relays"
   },
+  "4oPRxH": {
+    "defaultMessage": "Supported Kinds:"
+  },
   "4rYCjn": {
     "defaultMessage": "Note to Self"
   },
@@ -1148,6 +1151,9 @@
   "QWhotP": {
     "defaultMessage": "Zap Pool only works if you use one of the supported wallet connections (WebLN, LNC, LNDHub or Nostr Wallet Connect)"
   },
+  "QaGyuN": {
+    "defaultMessage": "Zapstr Track"
+  },
   "QpaLA3": {
     "defaultMessage": "Channel Message"
   },
@@ -1302,6 +1308,9 @@
   "ULXFfP": {
     "defaultMessage": "Receive"
   },
+  "ULsJTk": {
+    "defaultMessage": "Published by"
+  },
   "UNjfWJ": {
     "defaultMessage": "Check all event signatures received from relays"
   },

packages/app/src/translations/en.json

@@ -89,6 +89,7 @@
   "4Vmpt4": "Nostr Plebs is one of the first NIP-05 providers in the space and offers a good collection of domains at reasonable prices",
   "4Z3t5i": "Use imgproxy to compress images",
   "4emo2p": "Missing Relays",
+  "4oPRxH": "Supported Kinds:",
   "4rYCjn": "Note to Self",
   "4wgYpI": "Recommended Application Handlers",
   "5BVs2e": "zap",
@@ -380,6 +381,7 @@
   "QDFTjG": "{n} Relays",
   "QJfhKt": "The private key is like a password, but it cannot be reset. Guard it carefully and never show it to anyone. Once someone has your private key, they will have access to your account forever.",
   "QWhotP": "Zap Pool only works if you use one of the supported wallet connections (WebLN, LNC, LNDHub or Nostr Wallet Connect)",
+  "QaGyuN": "Zapstr Track",
   "QpaLA3": "Channel Message",
   "Qxv0B2": "You currently have {number} sats in your zap pool.",
   "Qy6/Ft": "Private Direct Messages",
@@ -431,6 +433,7 @@
   "U30H69": "Community Definition",
   "UJTWqI": "Remove from my relays",
   "ULXFfP": "Receive",
+  "ULsJTk": "Published by",
   "UNjfWJ": "Check all event signatures received from relays",
   "UT7Nkj": "New Chat",
   "UUPFlt": "Users must accept the content warning to show the content of your note.",

packages/system/src/event-kind.ts

@@ -55,6 +55,7 @@ const enum EventKind {
   LiveEvent = 30311, // NIP-102
   UserStatus = 30315, // NIP-38
   ZapstrTrack = 31337,
+  ApplicationHandler = 31_990,
   SimpleChatMetadata = 39_000, // NIP-29
   ZapRequest = 9734, // NIP 57
   ZapReceipt = 9735, // NIP 57

packages/system/src/nostr-link.ts

@@ -235,16 +235,30 @@ export class NostrLink implements ToNostrEventTag {
       }
       case "A": {
         const [kind, author, dTag] = tag[1].split(":");
+        if (!isHex(author)) {
+          throw new Error(`Invalid author in A tag: ${tag[1]}`);
+        }
         return new NostrLink(NostrPrefix.Address, dTag, Number(kind), author, relays, "root");
       }
       case "a": {
         const [kind, author, dTag] = tag[1].split(":");
+        if (!isHex(author)) {
+          throw new Error(`Invalid author in a tag: ${tag[1]}`);
+        }
         return new NostrLink(NostrPrefix.Address, dTag, Number(kind), author, relays, tag[3]);
       }
     }
     throw new Error("Unknown tag!");
   }
 
+  static tryFromTag(tag: Array<string>, author?: string, kind?: number) {
+    try {
+      return NostrLink.fromTag(tag, author, kind);
+    } catch (e) {
+      // ignored
+    }
+  }
+
   static fromTags(tags: ReadonlyArray<Array<string>>) {
     return removeUndefined(
       tags.map(a => {