GetBlockHeight demo app (#9)

2019-10-31 19:43:09 -03:00 · 2019-10-31 19:43:09 -03:00 · b1887cc1b6
parent 670ec12494
commit b1887cc1b6
10 changed files with 301 additions and 37 deletions
--- a/Example/ZcashLightClientSample/Podfile.lock
+++ b/Example/ZcashLightClientSample/Podfile.lock
@ -0,0 +1,59 @@
+PODS:
+  - BoringSSL-GRPC (0.0.3):
+    - BoringSSL-GRPC/Implementation (= 0.0.3)
+    - BoringSSL-GRPC/Interface (= 0.0.3)
+  - BoringSSL-GRPC/Implementation (0.0.3):
+    - BoringSSL-GRPC/Interface (= 0.0.3)
+  - BoringSSL-GRPC/Interface (0.0.3)
+  - gRPC-Core (1.23.1):
+    - gRPC-Core/Implementation (= 1.23.1)
+    - gRPC-Core/Interface (= 1.23.1)
+  - gRPC-Core/Implementation (1.23.1):
+    - BoringSSL-GRPC (= 0.0.3)
+    - gRPC-Core/Interface (= 1.23.1)
+    - nanopb (~> 0.3)
+  - gRPC-Core/Interface (1.23.1)
+  - nanopb (0.3.9011):
+    - nanopb/decode (= 0.3.9011)
+    - nanopb/encode (= 0.3.9011)
+  - nanopb/decode (0.3.9011)
+  - nanopb/encode (0.3.9011)
+  - SQLite.swift (0.12.2):
+    - SQLite.swift/standard (= 0.12.2)
+  - SQLite.swift/standard (0.12.2)
+  - SwiftGRPC (0.10.0):
+    - gRPC-Core (~> 1.23.0)
+    - SwiftProtobuf (~> 1.7.0)
+  - SwiftProtobuf (1.7.0)
+  - ZcashLightClientKit (0.0.1):
+    - SQLite.swift
+    - SwiftGRPC
+
+DEPENDENCIES:
+  - ZcashLightClientKit (from `../../`)
+
+SPEC REPOS:
+  trunk:
+    - BoringSSL-GRPC
+    - gRPC-Core
+    - nanopb
+    - SQLite.swift
+    - SwiftGRPC
+    - SwiftProtobuf
+
+EXTERNAL SOURCES:
+  ZcashLightClientKit:
+    :path: "../../"
+
+SPEC CHECKSUMS:
+  BoringSSL-GRPC: db8764df3204ccea016e1c8dd15d9a9ad63ff318
+  gRPC-Core: 4b1148eb8596225178e5a154e40e35141a3cdf0f
+  nanopb: 18003b5e52dab79db540fe93fe9579f399bd1ccd
+  SQLite.swift: d2b4642190917051ce6bd1d49aab565fe794eea3
+  SwiftGRPC: f8fcfecb547c96cc6913de619f95fa3cd09838ee
+  SwiftProtobuf: 4fd9645e69b72cbae6ec8da5be0cdd20ca6565dd
+  ZcashLightClientKit: 2adc70f65050b7940b527ce507f903c5ab7f1194
+
+PODFILE CHECKSUM: 7c9d39272319433442b14024a916deb276e81da4
+
+COCOAPODS: 1.8.4
--- a/Example/ZcashLightClientSample/ZcashLightClientSample.xcodeproj/project.pbxproj
+++ b/Example/ZcashLightClientSample/ZcashLightClientSample.xcodeproj/project.pbxproj
@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 50;
+	objectVersion = 51;
 	objects = {

 /* Begin PBXBuildFile section */
@ -14,6 +14,8 @@
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+		0DDFB33C236B743000AED892 /* LatestHeightViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0DDFB33B236B743000AED892 /* LatestHeightViewController.swift */; };
+		0DDFB33E236B844900AED892 /* DemoAppConfig.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0DDFB33D236B844900AED892 /* DemoAppConfig.swift */; };
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@ -50,6 +52,8 @@
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 		0D907F372322CC5B00D641FE /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		0DDFB33B236B743000AED892 /* LatestHeightViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LatestHeightViewController.swift; sourceTree = "<group>"; };
+		0DDFB33D236B844900AED892 /* DemoAppConfig.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DemoAppConfig.swift; sourceTree = "<group>"; };
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@ -114,12 +118,14 @@
 		0D907F142322CC5900D641FE /* ZcashLightClientSample */ = {
 			isa = PBXGroup;
 			children = (
+				0DDFB33A236B733700AED892 /* Latest Block Height */,
 				0D907F152322CC5900D641FE /* AppDelegate.swift */,
 				0D907F172322CC5900D641FE /* ViewController.swift */,
 				0D907F192322CC5900D641FE /* Main.storyboard */,
 				0D907F1C2322CC5B00D641FE /* Assets.xcassets */,
 				0D907F1E2322CC5B00D641FE /* LaunchScreen.storyboard */,
 				0D907F212322CC5B00D641FE /* Info.plist */,
+				0DDFB33D236B844900AED892 /* DemoAppConfig.swift */,
 			);
 			path = ZcashLightClientSample;
 			sourceTree = "<group>";
@ -142,6 +148,14 @@
 			path = ZcashLightClientSampleUITests;
 			sourceTree = "<group>";
 		};
+		0DDFB33A236B733700AED892 /* Latest Block Height */ = {
+			isa = PBXGroup;
+			children = (
+				0DDFB33B236B743000AED892 /* LatestHeightViewController.swift */,
+			);
+			path = "Latest Block Height";
+			sourceTree = "<group>";
+		};
 		66EF5A44FD6A5AC92244F054 /* Pods */ = {
 			isa = PBXGroup;
 			children = (
@ -152,7 +166,6 @@
 				59BA5F37462FF34F64350712 /* Pods-ZcashLightClientSampleUITests.debug.xcconfig */,
 				89F6F4B8F441C9EC43B7412A /* Pods-ZcashLightClientSampleUITests.release.xcconfig */,
 			);
-			name = Pods;
 			path = Pods;
 			sourceTree = "<group>";
 		};
@ -388,6 +401,8 @@
 			buildActionMask = 2147483647;
 			files = (
 				0D907F182322CC5900D641FE /* ViewController.swift in Sources */,
+				0DDFB33C236B743000AED892 /* LatestHeightViewController.swift in Sources */,
+				0DDFB33E236B844900AED892 /* DemoAppConfig.swift in Sources */,
 				0D907F162322CC5900D641FE /* AppDelegate.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
--- a/Example/ZcashLightClientSample/ZcashLightClientSample.xcodeproj/xcshareddata/xcschemes/ZcashLightClientSample.xcscheme
+++ b/Example/ZcashLightClientSample/ZcashLightClientSample.xcodeproj/xcshareddata/xcschemes/ZcashLightClientSample.xcscheme
@ -27,6 +27,15 @@
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
      shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "0D907F112322CC5900D641FE"
+            BuildableName = "ZcashLightClientSample.app"
+            BlueprintName = "ZcashLightClientSample"
+            ReferencedContainer = "container:ZcashLightClientSample.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
      <Testables>
         <TestableReference
            skipped = "NO">
@ -49,17 +58,6 @@
            </BuildableReference>
         </TestableReference>
      </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "0D907F112322CC5900D641FE"
-            BuildableName = "ZcashLightClientSample.app"
-            BlueprintName = "ZcashLightClientSample"
-            ReferencedContainer = "container:ZcashLightClientSample.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
   </TestAction>
   <LaunchAction
      buildConfiguration = "Debug"
@ -81,8 +79,13 @@
            ReferencedContainer = "container:ZcashLightClientSample.xcodeproj">
         </BuildableReference>
      </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "OS_ACTIVITY_MODE"
+            value = "disable"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
   </LaunchAction>
   <ProfileAction
      buildConfiguration = "Release"
--- a/Example/ZcashLightClientSample/ZcashLightClientSample/Base.lproj/Main.storyboard
+++ b/Example/ZcashLightClientSample/ZcashLightClientSample/Base.lproj/Main.storyboard
@ -1,24 +1,116 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="15400" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="Ewq-Xy-xHb">
+    <device id="retina6_1" orientation="portrait" appearance="light"/>
    <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="15404"/>
        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
-        <!--View Controller-->
-        <scene sceneID="tne-QT-ifu">
+        <!--Zcash Light Client Demo-->
+        <scene sceneID="uN9-tq-g5F">
            <objects>
-                <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="target" sceneMemberID="viewController">
-                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
-                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                <tableViewController storyboardIdentifier="MainTableViewController" id="SI9-Nk-8cq" customClass="MainTableViewController" customModule="ZcashLightClientSample" customModuleProvider="target" sceneMemberID="viewController">
+                    <tableView key="view" clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" dataMode="static" style="plain" separatorStyle="default" rowHeight="-1" estimatedRowHeight="-1" sectionHeaderHeight="28" sectionFooterHeight="28" id="EVy-1I-VtG">
+                        <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
-                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
-                    </view>
-                </viewController>
-                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+                        <color key="backgroundColor" systemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
+                        <sections>
+                            <tableViewSection id="HAA-1f-le3">
+                                <cells>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" preservesSuperviewLayoutMargins="YES" selectionStyle="default" indentationWidth="10" textLabel="AMo-WC-MIN" style="IBUITableViewCellStyleDefault" id="rCB-Ax-4Nk">
+                                        <rect key="frame" x="0.0" y="28" width="414" height="43.5"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" preservesSuperviewLayoutMargins="YES" insetsLayoutMarginsFromSafeArea="NO" tableViewCell="rCB-Ax-4Nk" id="ac2-bZ-mAy">
+                                            <rect key="frame" x="0.0" y="0.0" width="414" height="43.5"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" insetsLayoutMarginsFromSafeArea="NO" text="Latest Block Height" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="AMo-WC-MIN">
+                                                    <rect key="frame" x="20" y="0.0" width="374" height="43.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <nil key="textColor"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                        <connections>
+                                            <segue destination="tq2-zN-roj" kind="showDetail" id="9PR-VZ-Av4"/>
+                                        </connections>
+                                    </tableViewCell>
+                                </cells>
+                            </tableViewSection>
+                        </sections>
+                        <connections>
+                            <outlet property="dataSource" destination="SI9-Nk-8cq" id="xCt-5D-VOK"/>
+                            <outlet property="delegate" destination="SI9-Nk-8cq" id="den-Kz-QKF"/>
+                        </connections>
+                    </tableView>
+                    <navigationItem key="navigationItem" title="Zcash Light Client Demo" id="rvd-yg-s1L"/>
+                </tableViewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="u9B-ne-NE7" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
            </objects>
+            <point key="canvasLocation" x="828" y="40"/>
+        </scene>
+        <!--Latest Height View Controller-->
+        <scene sceneID="4pw-mR-qER">
+            <objects>
+                <viewController id="tq2-zN-roj" customClass="LatestHeightViewController" customModule="ZcashLightClientSample" customModuleProvider="target" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="tie-BL-1Ip">
+                        <rect key="frame" x="0.0" y="0.0" width="414" height="842"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="0Hj-Jx-J3i">
+                                <rect key="frame" x="0.0" y="421" width="414" height="0.0"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="23"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Latest Block Height" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="WKf-j9-SjN">
+                                <rect key="frame" x="20" y="258" width="374" height="49"/>
+                                <constraints>
+                                    <constraint firstAttribute="height" constant="49" id="AXS-cf-OMk"/>
+                                </constraints>
+                                <fontDescription key="fontDescription" type="system" pointSize="26"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                        </subviews>
+                        <color key="backgroundColor" systemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
+                        <constraints>
+                            <constraint firstItem="0Hj-Jx-J3i" firstAttribute="centerY" secondItem="tie-BL-1Ip" secondAttribute="centerY" id="6HS-U8-JHx"/>
+                            <constraint firstItem="WKf-j9-SjN" firstAttribute="centerX" secondItem="0Hj-Jx-J3i" secondAttribute="centerX" id="UOE-Jf-r6N"/>
+                            <constraint firstItem="WKf-j9-SjN" firstAttribute="leading" secondItem="tie-BL-1Ip" secondAttribute="leadingMargin" id="V4z-zJ-vIT"/>
+                            <constraint firstItem="WKf-j9-SjN" firstAttribute="top" secondItem="fg7-R9-l4X" secondAttribute="top" constant="258" id="VBh-xj-OhB"/>
+                            <constraint firstItem="0Hj-Jx-J3i" firstAttribute="leading" secondItem="fg7-R9-l4X" secondAttribute="leading" id="kAe-yR-Nr8"/>
+                            <constraint firstItem="0Hj-Jx-J3i" firstAttribute="centerX" secondItem="tie-BL-1Ip" secondAttribute="centerX" id="ruf-Mw-pLN"/>
+                        </constraints>
+                        <viewLayoutGuide key="safeArea" id="fg7-R9-l4X"/>
+                    </view>
+                    <connections>
+                        <outlet property="blockHeightLabel" destination="0Hj-Jx-J3i" id="P2U-am-RMw"/>
+                    </connections>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="mVQ-br-4uP" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="1528.985507246377" y="3.3482142857142856"/>
+        </scene>
+        <!--Navigation Controller-->
+        <scene sceneID="0ru-sC-FRK">
+            <objects>
+                <navigationController id="Ewq-Xy-xHb" sceneMemberID="viewController">
+                    <navigationBar key="navigationBar" contentMode="scaleToFill" insetsLayoutMarginsFromSafeArea="NO" id="AlK-mv-yla">
+                        <rect key="frame" x="0.0" y="44" width="414" height="44"/>
+                        <autoresizingMask key="autoresizingMask"/>
+                    </navigationBar>
+                    <connections>
+                        <segue destination="SI9-Nk-8cq" kind="relationship" relationship="rootViewController" id="ru0-HO-yTe"/>
+                    </connections>
+                </navigationController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="tfJ-Ir-11I" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="-92" y="40"/>
        </scene>
    </scenes>
 </document>
--- a/Example/ZcashLightClientSample/ZcashLightClientSample/DemoAppConfig.swift
+++ b/Example/ZcashLightClientSample/ZcashLightClientSample/DemoAppConfig.swift
@ -0,0 +1,26 @@
+//
+//  DemoAppConfig.swift
+//  ZcashLightClientSample
+//
+//  Created by Francisco Gindre on 10/31/19.
+//  Copyright © 2019 Electric Coin Company. All rights reserved.
+//
+
+import Foundation
+import ZcashLightClientKit
+
+struct DemoAppConfig {
+    static var host = "34.68.177.238"
+    static var port = "9067"
+    static var birthdayHeight: BlockHeight = 620_000
+    static var network = ZcashNetwork.testNet
+    static var seed = Array("testreferencealice".utf8)    
+    static var address: String {
+        "\(host):\(port)"
+    }
+}
+
+enum ZcashNetwork {
+    case mainNet
+    case testNet
+}
--- a/Example/ZcashLightClientSample/ZcashLightClientSample/Info.plist
+++ b/Example/ZcashLightClientSample/ZcashLightClientSample/Info.plist
@ -41,5 +41,10 @@
 		<string>UIInterfaceOrientationLandscapeLeft</string>
 		<string>UIInterfaceOrientationLandscapeRight</string>
 	</array>
+	<key>NSAppTransportSecurity</key>
+	<dict>
+		<key>NSAllowsArbitraryLoads</key>
+		<true/>
+	</dict>
 </dict>
 </plist>
--- a/Example/ZcashLightClientSample/ZcashLightClientSample/Latest
+++ b/Example/ZcashLightClientSample/ZcashLightClientSample/Latest
@ -0,0 +1,60 @@
+//
+//  LatestHeightViewController.swift
+//  ZcashLightClientSample
+//
+//  Created by Francisco Gindre on 10/31/19.
+//  Copyright © 2019 Electric Coin Company. All rights reserved.
+//
+
+import UIKit
+import ZcashLightClientKit
+
+class LatestHeightViewController: UIViewController {
+    
+    @IBOutlet weak var blockHeightLabel: UILabel!
+    
+    var service: LightWalletService = LightWalletGRPCService(host: DemoAppConfig.address, secure: false)
+    var model: BlockHeight? {
+        didSet {
+            if viewIfLoaded != nil {
+                setup()
+            }
+        }
+    }
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        setup()
+    }
+    
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        service.latestBlockHeight { (result) in
+            switch result {
+            case .success(let height):
+                DispatchQueue.main.async { [weak self] in
+                    self?.model = height
+                }
+            case .failure(let error):
+                DispatchQueue.main.async { [weak self] in
+                    self?.fail(error)
+                }
+            }
+        }
+    }
+    
+    func setup() {
+        guard let model = self.model else {
+            return
+        }
+        blockHeightLabel.text = String(model)
+    }
+    
+    func fail(_ error: LightWalletServiceError) {
+        self.blockHeightLabel.text = "Error"
+        
+        let alert = UIAlertController(title: "Error", message: error.localizedDescription, preferredStyle: .alert)
+        alert.addAction(UIAlertAction(title: "Ok", style: .cancel, handler: nil))
+        self.present(alert, animated: true, completion: nil)
+    }
+}
--- a/Example/ZcashLightClientSample/ZcashLightClientSample/ViewController.swift
+++ b/Example/ZcashLightClientSample/ZcashLightClientSample/ViewController.swift
@ -8,7 +8,7 @@

 import UIKit

-class ViewController: UIViewController {
+class MainTableViewController: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
--- a/ZcashLightClientKit/Service/LightWalletGRPCService.swift
+++ b/ZcashLightClientKit/Service/LightWalletGRPCService.swift
@ -9,18 +9,23 @@
 import Foundation
 import SwiftGRPC

-class LightWalletGRPCService {
+public class LightWalletGRPCService {
    
    var queue = DispatchQueue.init(label: "LightWalletGRPCService")
    let channel: Channel
    
    let compactTxStreamer: CompactTxStreamerServiceClient
    
-    init(channel: Channel) {
+    public init(channel: Channel) {
        self.channel = channel
        compactTxStreamer = CompactTxStreamerServiceClient(channel: self.channel)
    }
    
+    public convenience init(host: String, secure: Bool = true) {
+        let channel = Channel(address: host, secure: secure, arguments: [])
+        self.init(channel: channel)
+    }
+    
    func blockRange(startHeight: BlockHeight, endHeight: BlockHeight? = nil, result: @escaping (CallResult) -> Void) throws -> CompactTxStreamerGetBlockRangeCall {
        try compactTxStreamer.getBlockRange(BlockRange(startHeight: startHeight, endHeight: endHeight)) { result($0) }
    }
@ -43,7 +48,7 @@ class LightWalletGRPCService {

 extension LightWalletGRPCService: LightWalletService {
    
-    func blockRange(_ range: CompactBlockRange) throws -> [ZcashCompactBlock] {
+    public func blockRange(_ range: CompactBlockRange) throws -> [ZcashCompactBlock] {
        var blocks = [ZcashCompactBlock]()
        
        let call = try compactTxStreamer.getBlockRange(range.blockRange(), completion: { statusCode in
@ -62,7 +67,7 @@ extension LightWalletGRPCService: LightWalletService {
        return blocks
    }
    
-    func latestBlockHeight(result: @escaping (Result<BlockHeight, LightWalletServiceError>) -> Void) {
+    public func latestBlockHeight(result: @escaping (Result<BlockHeight, LightWalletServiceError>) -> Void) {
        do {
            try compactTxStreamer.getLatestBlock(ChainSpec()) { (blockID, _) in
                guard let rawHeight = blockID?.height, let blockHeight = Int(exactly: rawHeight) else {
@ -79,7 +84,7 @@ extension LightWalletGRPCService: LightWalletService {
    }
    
    // TODO: Make cancellable
-    func blockRange(_ range: CompactBlockRange, result: @escaping (Result<[ZcashCompactBlock], LightWalletServiceError>) -> Void) {
+    public func blockRange(_ range: CompactBlockRange, result: @escaping (Result<[ZcashCompactBlock], LightWalletServiceError>) -> Void) {
        
        queue.async {
            var blocks = [CompactBlock]()
@ -124,7 +129,7 @@ extension LightWalletGRPCService: LightWalletService {
        
    }
    
-    func latestBlockHeight() throws -> BlockHeight {
+    public func latestBlockHeight() throws -> BlockHeight {
        
        guard let height = try? latestBlock().compactBlockHeight() else {
            throw LightWalletServiceError.invalidBlock
--- a/ZcashLightClientKit/Wallet.swift
+++ b/ZcashLightClientKit/Wallet.swift
@ -19,7 +19,7 @@ public enum WalletError: Error {

 public class Wallet {
    
-    private var rustBackend: ZcashRustBackendWelding.Type
+    private var rustBackend: ZcashRustBackendWelding.Type = ZcashRustBackend.self
    private var dataDbURL: URL
    private var cacheDbURL: URL
    private var paramDestination: URL
@ -28,9 +28,8 @@ public class Wallet {
    private var walletBirthday: WalletBirthday
    private var compactBlockStorage: CompactBlockStoring?
    
-    init(rustWelding: ZcashRustBackendWelding.Type, cacheDbURL: URL, dataDbURL: URL, paramDestination: URL, seedProvider: SeedProvider, walletBirthday: WalletBirthday, accountIDs: [Int] = [0]) {
+    init(cacheDbURL: URL, dataDbURL: URL, paramDestination: URL, seedProvider: SeedProvider, walletBirthday: WalletBirthday, accountIDs: [Int] = [0]) {
        
-        self.rustBackend = rustWelding.self
        self.dataDbURL = dataDbURL
        self.paramDestination = paramDestination
        self.accountIDs = accountIDs