Fixed crash Swift runtime failure: arithmetic overflow

litewallet/ViewModels/Transaction.swift

@@ -40,14 +40,23 @@ class Transaction {
 		self.fee = fee + opsAmount
 
 		let amountReceived = wallet.amountReceivedFromTx(tx)
-		let amountSent = wallet.amountSentByTx(tx) - opsAmount
+
+		// This ensures that amountSent is always non-negative and within the valid range for UInt64.
+		let amountSent = wallet.amountSentByTx(tx) > opsAmount
+			? wallet.amountSentByTx(tx) - opsAmount
+			: 0
 
 		if amountSent > 0, (amountReceived + fee) == amountSent {
 			direction = .moved
 			satoshis = amountSent
 		} else if amountSent > 0 {
 			direction = .sent
-			satoshis = amountSent - amountReceived - fee
+            // This ensures that satoshis is always non-negative and within the valid range for UInt64.
+            if amountSent >= (amountReceived + fee) {
+                satoshis = amountSent - amountReceived - fee
+            } else {
+                satoshis = 0
+            }
 		} else {
 			direction = .received
 			satoshis = amountReceived