fix compilation errors

ZcashLightClientKitTests/utils/DarkSideWalletService.swift

@@ -38,6 +38,14 @@ enum DarksideDataset: String {
 }
 
 class DarksideWalletService: LightWalletService {
+    func getInfo() throws -> LightWalletdInfo {
+        try service.getInfo()
+    }
+    
+    func getInfo(result: @escaping (Result<LightWalletdInfo, LightWalletServiceError>) -> Void) {
+        service.getInfo(result: result)
+    }
+    
     func closeConnection() {
         
     }

ZcashLightClientKitTests/utils/FakeService.swift

@@ -18,6 +18,14 @@ struct LightWalletServiceMockResponse: LightWalletServiceResponse {
 }
 
 class MockLightWalletService: LightWalletService {
+    func getInfo() throws -> LightWalletdInfo {
+        throw LightWalletServiceError.generalError(message: "Not Implemented")
+    }
+    
+    func getInfo(result: @escaping (Result<LightWalletdInfo, LightWalletServiceError>) -> Void) {
+        return result(.failure(LightWalletServiceError.generalError(message: "Not Implemented")))
+    }
+    
     func closeConnection() {
         
     }

ZcashLightClientKitTests/utils/MockTransactionRepository.swift

@@ -10,6 +10,10 @@ import Foundation
 @testable import ZcashLightClientKit
 
 class MockTransactionRepository: TransactionRepository {
+    func blockForHeight(_ height: BlockHeight) throws -> Block? {
+        nil
+    }
+    
     func findConfirmedTransactions(in range: BlockRange, offset: Int, limit: Int) throws -> [ConfirmedTransactionEntity]? {
         nil
     }