[#1292] Optional chainTip for account creation

- Prepare of the synchronizer should be possible even if the server is down, fetching chain tip was forced and newly is optional

[#1292] Optional chainTip for account creation

- changelog updated

CHANGELOG.md

@@ -6,6 +6,9 @@ and this library adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 # Unreleased
 
+## Fixed
+- Synchronizer's' `prepare()` method passes even if server is down and not providing chan tip. 
+
 # 2.1.8 - 2024-05-30
 
 ## Added

Sources/ZcashLightClientKit/Initializer.swift

@@ -415,8 +415,8 @@ public class Initializer {
         if let seed, try await rustBackend.listAccounts().isEmpty {
             var chainTip: UInt32?
             
-            if walletMode == .restoreWallet {
-                chainTip = UInt32(try await lightWalletService.latestBlockHeight())
+            if walletMode == .restoreWallet, let latestBlockHeight = try? await lightWalletService.latestBlockHeight() {
+                chainTip = UInt32(latestBlockHeight)
             }
             
             _ = try await rustBackend.createAccount(