Code review:

- invalidate zaps flow when removeAllChildNotes clears onchainZaps
- simplify on-chain zap gallery after review

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/OnchainZapGallery.kt

@@ -20,7 +20,6 @@
  */
 package com.vitorpamplona.amethyst.ui.note
 
-import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -29,20 +28,13 @@ import androidx.compose.foundation.layout.FlowRow
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.shape.CircleShape
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.alpha
-import androidx.compose.ui.draw.clip
-import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
-import androidx.compose.ui.unit.sp
 import com.vitorpamplona.amethyst.commons.model.OnchainZapEntry
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.service.relayClient.reqCommand.event.observeNoteZaps
@@ -51,11 +43,8 @@ import com.vitorpamplona.amethyst.ui.navigation.routes.routeFor
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.theme.Size25dp
 import com.vitorpamplona.amethyst.ui.theme.Size35Modifier
-import com.vitorpamplona.amethyst.ui.theme.Size35dp
 import com.vitorpamplona.amethyst.ui.theme.StdStartPadding
 import com.vitorpamplona.amethyst.ui.theme.WidthAuthorPictureModifier
-import com.vitorpamplona.amethyst.ui.theme.bitcoinColor
-import com.vitorpamplona.amethyst.ui.theme.overPictureBackground
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
 import kotlinx.collections.immutable.toImmutableList
@@ -76,14 +65,17 @@ internal fun WatchOnchainZapsAndRenderGallery(
 ) {
     // Reuse the same flow the lightning gallery subscribes to. Note.addOnchainZap
     // invalidates flowSet.zaps, so this composable refreshes when on-chain zaps
-    // arrive or upgrade pending → confirmed.
+    // arrive or upgrade pending → confirmed. The flow also fires for lightning
+    // zap arrivals on the same note, so memoize the list snapshot.
     val zapsState by observeNoteZaps(baseNote, accountViewModel)
     val entries =
+        remember(zapsState) {
             zapsState
                 ?.note
                 ?.onchainZaps
                 ?.values
                 ?.toImmutableList() ?: persistentListOf()
+        }
 
     if (entries.isNotEmpty()) {
         RenderOnchainZapGallery(entries, nav, accountViewModel)
@@ -136,13 +128,8 @@ private fun OnchainZapEntryRow(
         }
     val avatarAlpha = if (entry.confirmed) 1f else 0.6f
 
-    Row(
-        modifier =
-            Modifier.clickable { onOnchainZapEntryClick(entry, nav) },
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
     Box(
-            modifier = Size35Modifier,
+        modifier = Size35Modifier.clickable { onOnchainZapEntryClick(entry, nav) },
         contentAlignment = Alignment.BottomCenter,
     ) {
         // Only the avatar dims for pending entries. The amount overlay and clock
@@ -154,39 +141,15 @@ private fun OnchainZapEntryRow(
             )
         }
 
-            // Amount overlay — same look as the lightning row's CrossfadeToDisplayAmount.
-            Box(
-                modifier =
-                    Modifier
-                        .size(Size35dp)
-                        .clip(CircleShape),
-                contentAlignment = Alignment.BottomCenter,
-            ) {
-                val overlayBg = MaterialTheme.colorScheme.overPictureBackground
-                Box(
-                    modifier = remember(overlayBg) { Modifier.width(Size35dp).background(overlayBg) },
-                    contentAlignment = Alignment.BottomCenter,
-                ) {
-                    Text(
-                        text = amountText,
-                        fontWeight = FontWeight.Bold,
-                        color = MaterialTheme.colorScheme.bitcoinColor,
-                        fontSize = 12.sp,
-                        modifier = bottomPadding1dp,
-                    )
-                }
-            }
+        CrossfadeToDisplayAmount(amountText)
 
         if (!entry.confirmed) {
             // TopStart so the badge doesn't collide with the FollowingIcon
             // that WatchUserMetadataAndFollowsAndRenderUserProfilePicture
             // paints at TopEnd for followed users.
-                Box(
-                    modifier = Modifier.align(Alignment.TopStart),
-                ) {
+            Box(modifier = Modifier.align(Alignment.TopStart)) {
                 PendingClockBadge(modifier = Modifier.size(14.dp))
             }
         }
     }
 }
-}

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/Note.kt

@@ -310,7 +310,7 @@ open class Note(
     fun removeAllChildNotes(): List<Note> {
         val repliesChanged = replies.isNotEmpty()
         val reactionsChanged = reactions.isNotEmpty()
-        val zapsChanged = zaps.isNotEmpty() || zapPayments.isNotEmpty()
+        val zapsChanged = zaps.isNotEmpty() || zapPayments.isNotEmpty() || onchainZaps.isNotEmpty()
         val boostsChanged = boosts.isNotEmpty()
         val reportsChanged = reports.isNotEmpty()
 
@@ -435,15 +435,14 @@ open class Note(
         entry: OnchainZapEntry,
     ): Boolean {
         val existing = onchainZaps[txid]
-        if (existing == null) {
-            onchainZaps = onchainZaps + Pair(txid, entry)
-            return true
-        }
+        if (existing != null) {
             // Same-state duplicate: keep the first source and amount we got.
             if (existing.confirmed == entry.confirmed) return false
-        // Downgrade confirmed → pending: never accept.
-        if (existing.confirmed && !entry.confirmed) return false
-        // Upgrade pending → confirmed: replace, so the upgrading event's source wins.
+            // Downgrade confirmed → pending: never accept. States differ here,
+            // so existing.confirmed alone is sufficient to identify the downgrade.
+            if (existing.confirmed) return false
+            // Else: existing pending + incoming confirmed — fall through to upgrade.
+        }
         onchainZaps = onchainZaps + Pair(txid, entry)
         return true
     }

commons/src/commonTest/kotlin/com/vitorpamplona/amethyst/commons/model/NoteOnchainZapTest.kt

@@ -94,9 +94,13 @@ class NoteOnchainZapTest {
         val secondSrc = sourceNote("2".repeat(64))
 
         target.addOnchainZap(firstSrc, "tx1", 100L, confirmed = true)
-        target.addOnchainZap(secondSrc, "tx1", 100L, confirmed = true)
+        // Mismatched verifiedSats so we can detect a regression that silently
+        // overwrites the first entry with the second.
+        target.addOnchainZap(secondSrc, "tx1", 999L, confirmed = true)
 
-        assertSame(firstSrc, target.onchainZaps["tx1"]?.source)
+        val entry = target.onchainZaps["tx1"]
+        assertSame(firstSrc, entry?.source)
+        assertEquals(100L, entry?.verifiedSats)
         assertEquals(BigDecimal.valueOf(100L), target.zapsAmount)
     }