[#1429] Deduplicate messages on transaction

- Closes #1429
- Changelog update

CHANGELOG.md

@@ -12,6 +12,7 @@ directly impact users rather than highlighting other key architectural updates.*
 ### Added
 - Delete Zashi feature has been added. It's accessible from the Advanced settings screen. It removes the wallet 
   secrets from Zashi and resets its state.
+- Transaction messages are now checked and removed in case of duplicity  
 
 ### Changed
 - We've improved the visibility logic of the little loader that is part of the Balances widget

ui-lib/src/main/java/co/electriccoin/zcash/ui/screen/account/view/HistoryView.kt

@@ -545,8 +545,13 @@ private fun HistoryItemExpandedPart(
 ) {
     Column(modifier = modifier) {
         if (transaction.messages.containsValidMemo()) {
+            // Filter out identical messages on a multi-messages transaction that could be created, e.g., using
+            // YWallet, which tends to balance orchard and sapling pools, including by splitting a payment equally
+            // across both pools.
+            val uniqueMessages = transaction.messages!!.deduplicateMemos()
+
             HistoryItemMessagePart(
-                messages = transaction.messages!!.toPersistentList(),
+                messages = uniqueMessages.toPersistentList(),
                 state = transaction.overview.getExtendedState(),
                 onAction = onAction
             )
@@ -592,6 +597,10 @@ private fun List<String>?.containsValidMemo(): Boolean {
     return !isNullOrEmpty() && find { it.isNotEmpty() } != null
 }
 
+private fun List<String>.deduplicateMemos(): List<String> {
+    return distinct()
+}
+
 const val EXPANDED_TRANSACTION_ID_WIDTH_RATIO = 0.75f
 const val COLLAPSED_TRANSACTION_ID_WIDTH_RATIO = 0.5f