keep parse result on Store.

src/main/scala/Main.scala

@@ -1,4 +1,3 @@
-import cats.data.*
 import cats.effect.*
 import cats.effect.syntax.all.*
 import cats.syntax.all.*
@@ -15,40 +14,6 @@ import snow.*
 import Utils.*
 import Components.*
 
-object Store {
-  def apply(window: Window[IO]): Resource[IO, Store] = {
-    val key = "nak-input"
-
-    for {
-      inputRef <- SignallingRef[IO].of("").toResource
-
-      _ <- Resource.eval {
-        OptionT(window.localStorage.getItem(key))
-          .foreachF(inputRef.set(_))
-      }
-
-      _ <- window.localStorage
-        .events(window)
-        .foreach {
-          case Storage.Event.Updated(`key`, _, value, _) =>
-            inputRef.set(value)
-          case _ => IO.unit
-        }
-        .compile
-        .drain
-        .background
-
-      _ <- inputRef.discrete
-        .foreach(input => IO.cede *> window.localStorage.setItem(key, input))
-        .compile
-        .drain
-        .background
-    } yield new Store(inputRef)
-  }
-}
-
-case class Store(input: SignallingRef[IO, String])
-
 object Main extends IOWebApp {
   def render: Resource[IO, HtmlDivElement[IO]] = Store(window).flatMap {
     store =>
@@ -120,10 +85,7 @@ object Main extends IOWebApp {
   def result(store: Store): Resource[IO, HtmlDivElement[IO]] =
     div(
       cls := "w-full flex my-5",
-      store.input.map { input =>
-        if input.trim() == "" then div("")
-        else
-          Parser.parseInput(input) match {
+      store.result.map {
         case Left(msg) => div(msg)
         case Right(event: Event) =>
           renderEvent(event)
@@ -136,7 +98,5 @@ object Main extends IOWebApp {
           )
         case Right(addr: AddressPointer) => renderAddressPointer(addr)
       }
-
-      }
     )
 }

src/main/scala/Parser.scala

@@ -3,13 +3,13 @@ import cats.syntax.all.*
 import scoin.*
 import snow.*
 
-import Components.*
-
-object Parser {
-  def parseInput(input: String): Either[
+type Result = Either[
   String,
   Event | PrivateKey | AddressPointer | EventPointer | ProfilePointer
-  ] =
+]
+
+object Parser {
+  def parseInput(input: String): Result =
     NIP19.decode(input) match {
       case Right(pp: ProfilePointer)   => Right(pp)
       case Right(evp: EventPointer)    => Right(evp)

src/main/scala/Store.scala

@@ -0,0 +1,45 @@
+import cats.data.*
+import cats.effect.*
+import cats.effect.syntax.all.*
+import cats.syntax.all.*
+import fs2.concurrent.*
+import fs2.dom.{Event => _, *}
+
+case class Store(
+    input: SignallingRef[IO, String],
+    result: SignallingRef[IO, Result]
+)
+
+object Store {
+  def apply(window: Window[IO]): Resource[IO, Store] = {
+    val key = "nak-input"
+
+    for {
+      input <- SignallingRef[IO].of("").toResource
+      result <- SignallingRef[IO, Result](Left("")).toResource
+
+      _ <- Resource.eval {
+        OptionT(window.localStorage.getItem(key))
+          .foreachF(input.set(_))
+      }
+
+      _ <- window.localStorage
+        .events(window)
+        .foreach {
+          case Storage.Event.Updated(`key`, _, value, _) =>
+            input.set(value)
+          case _ => IO.unit
+        }
+        .compile
+        .drain
+        .background
+
+      _ <- input.discrete
+        .evalTap(input => IO.cede *> window.localStorage.setItem(key, input))
+        .evalTap(input => result.set(Parser.parseInput(input)))
+        .compile
+        .drain
+        .background
+    } yield Store(input, result)
+  }
+}