[#1232] Implement createAccount

Example/ZcashLightClientSample/ZcashLightClientSample/DemoAppConfig.swift

@@ -28,7 +28,7 @@ enum DemoAppConfig {
 
     static let defaultBirthdayHeight: BlockHeight = ZcashSDK.isMainnet ? 1935000 : 2170000
     static let defaultSeed = try! Mnemonic.deterministicSeedBytes(from: """
-    kitchen renew wide common vague fold vacuum tilt amazing pear square gossip jewel month tree shock scan alpha just spot fluid toilet view dinner
+    wish puppy smile loan doll curve hole maze file ginger hair nose key relax knife witness cannon grab despair throw review deal slush frame
     """)
 
     static let otherSynchronizers: [SynchronizerInitData] = [

Example/ZcashLightClientSample/ZcashLightClientSample/Send/SendViewController.swift

@@ -79,8 +79,7 @@ class SendViewController: UIViewController {
 
     func setUp() {
         Task { @MainActor in
-            balanceLabel.text = format(balance: (try? await synchronizer.getShieldedBalance(accountIndex: 0)) ?? .zero)
-            verifiedBalanceLabel.text = format(balance: (try? await synchronizer.getShieldedVerifiedBalance(accountIndex: 0)) ?? .zero)
+            await updateBalance()
             await toggleSendButton()
         }
         memoField.text = ""
@@ -93,12 +92,20 @@ class SendViewController: UIViewController {
             .throttle(for: .seconds(0.2), scheduler: DispatchQueue.main, latest: true)
             .sink(
                 receiveValue: { [weak self] state in
+                    Task { @MainActor in
+                        await self?.updateBalance()
+                    }
                     self?.synchronizerStatusLabel.text = SDKSynchronizer.textFor(state: state.syncStatus)
                 }
             )
             .store(in: &cancellables)
     }
 
+    func updateBalance() async {
+        balanceLabel.text = format(balance: (try? await synchronizer.getShieldedBalance(accountIndex: 0)) ?? .zero)
+        verifiedBalanceLabel.text = format(balance: (try? await synchronizer.getShieldedVerifiedBalance(accountIndex: 0)) ?? .zero)
+    }
+
     func format(balance: Zatoshi = Zatoshi()) -> String {
         "Zec \(balance.formattedString ?? "0.0")"
     }

Sources/ZcashLightClientKit/Initializer.swift

@@ -420,7 +420,15 @@ public class Initializer {
 
         self.walletBirthday = checkpoint.height
 
-        // TODO: Initialize accounts if desired.
+        // If there are no accounts it must be created, the default amount of accounts is 1
+        if let seed, try accountRepository.getAll().isEmpty {
+            // TODO: [#1236] set the recoverUntil properly, https://github.com/zcash/ZcashLightClientKit/issues/1236
+            _ = try await rustBackend.createAccount(
+                seed: seed,
+                treeState: try checkpoint.treeState().serializedData(partial: false).bytes,
+                recoverUntil: nil
+            )
+        }
 
         return .success
     }

Sources/ZcashLightClientKit/Rust/ZcashRustBackend.swift

@@ -48,14 +48,20 @@ actor ZcashRustBackend: ZcashRustBackendWelding {
     }
 
     func createAccount(seed: [UInt8], treeState: [UInt8], recoverUntil: UInt32?) async throws -> UnifiedSpendingKey {
+        var rUntil: Int64 = -1
+
+        if let recoverUntil {
+            rUntil = Int64(recoverUntil)
+        }
+
         let ffiBinaryKeyPtr = zcashlc_create_account(
             dbData.0,
             dbData.1,
             seed,
             UInt(seed.count),
             treeState,
             UInt(treeState.count),
-            recoverUntil != nil ? Int64(recoverUntil!) : -1,
+            rUntil,
             networkType.networkId
         )
 
@@ -521,7 +527,7 @@ actor ZcashRustBackend: ZcashRustBackendWelding {
         if result.denominator == 0 {
             switch result.numerator {
             case 0:
-                return nil;
+                return nil
             default:
                 throw ZcashError.rustGetScanProgress(lastErrorMessage(fallback: "`getScanProgress` failed with unknown error"))
             }