KeepKey hardware wallet integration — Phase 1 (account setup + Orchard PCZT signing)

app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-feature android:name="android.hardware.usb.host" android:required="false" />
+
     <application
         android:name="co.electriccoin.zcash.app.ZcashApplication"
         android:allowBackup="true"

app/src/main/res/xml/keepkey_device_filter.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- KeepKey hardware wallet: VID 0x2B24, PID 0x0001 -->
+    <usb-device vendor-id="11044" product-id="1" />
+</resources>

gradle.properties

@@ -211,6 +211,8 @@ ZIP_321_VERSION = 1.0.2
 KTOR_VERSION =3.4.0
 # WARNING: Ensure a non-snapshot version is used before releasing to production
 ZCASH_BIP39_VERSION=1.0.9
+PROTOBUF_GRADLE_PLUGIN_VERSION=0.9.4
+PROTOBUF_VERSION=4.28.2
 # WARNING: Ensure a non-snapshot version is used before releasing to production
 ZCASH_SDK_VERSION=2.5.0-SNAPSHOT
 

settings.gradle.kts

@@ -66,6 +66,7 @@ pluginManagement {
         kotlin("jvm") version (kotlinVersion) apply false
         kotlin("multiplatform") version (kotlinVersion) apply false
         kotlin("plugin.serialization") version (kotlinVersion) apply false
+        id("com.google.protobuf") version (extra["PROTOBUF_GRADLE_PLUGIN_VERSION"].toString()) apply false
     }
 }
 
@@ -206,6 +207,7 @@ dependencyResolutionManagement {
             val keystoneVersion = extra["KEYSTONE_VERSION"].toString()
             val shimmerVersion = extra["SHIMMER_VERSION"].toString()
             val ktorVersion = extra["KTOR_VERSION"].toString()
+            val protobufVersion = extra["PROTOBUF_VERSION"].toString()
 
             // Standalone versions
             version("flank", flankVersion)
@@ -281,6 +283,8 @@ dependencyResolutionManagement {
             library("ktor-negotiation", "io.ktor" ,"ktor-client-content-negotiation").withoutVersion()
             library("ktor-json", "io.ktor" ,"ktor-serialization-kotlinx-json").withoutVersion()
             library("ktor-logging", "io.ktor" ,"ktor-client-logging").withoutVersion()
+            library("protobuf-kotlin-lite", "com.google.protobuf:protobuf-kotlin-lite:$protobufVersion")
+            library("protobuf-protoc", "com.google.protobuf:protoc:$protobufVersion")
 
             // Test libraries
             library("androidx-compose-test-junit", "androidx.compose.ui:ui-test-junit4:$androidxComposeVersion")

ui-design-lib/src/main/res/ui/common/drawable-night/ic_item_keepkey.xml

@@ -0,0 +1,14 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="40dp"
+    android:height="40dp"
+    android:viewportWidth="40"
+    android:viewportHeight="40">
+  <!-- Slightly lighter background for night mode -->
+  <path
+      android:pathData="M0,20C0,8.954 8.954,0 20,0C31.046,0 40,8.954 40,20C40,31.046 31.046,40 20,40C8.954,40 0,31.046 0,20Z"
+      android:fillColor="#252545"/>
+  <!-- Stylised "K" shape representing KeepKey -->
+  <path
+      android:pathData="M12,10L16,10L16,19L23,10L28,10L20,20L28,30L23,30L16,21L16,30L12,30Z"
+      android:fillColor="#F7931A"/>
+</vector>

ui-design-lib/src/main/res/ui/common/drawable/ic_item_keepkey.xml

@@ -0,0 +1,14 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="40dp"
+    android:height="40dp"
+    android:viewportWidth="40"
+    android:viewportHeight="40">
+  <!-- Dark background circle -->
+  <path
+      android:pathData="M0,20C0,8.954 8.954,0 20,0C31.046,0 40,8.954 40,20C40,31.046 31.046,40 20,40C8.954,40 0,31.046 0,20Z"
+      android:fillColor="#1A1A2E"/>
+  <!-- Stylised "K" shape representing KeepKey -->
+  <path
+      android:pathData="M12,10L16,10L16,19L23,10L28,10L20,20L28,30L23,30L16,21L16,30L12,30Z"
+      android:fillColor="#F7931A"/>
+</vector>

ui-lib/build.gradle.kts

@@ -11,6 +11,7 @@ plugins {
     id("wtf.emulator.gradle")
     id("secant.emulator-wtf-conventions")
     id("secant.jacoco-conventions")
+    id("com.google.protobuf")
 }
 
 android {
@@ -90,6 +91,7 @@ android {
                     "src/main/res/ui/whats_new",
                     "src/main/res/ui/exchange_rate",
                     "src/main/res/ui/tor",
+                    "src/main/res/ui/keepkey",
                 )
             )
         }
@@ -165,6 +167,24 @@ androidComponents {
     }
 }
 
+protobuf {
+    protoc {
+        artifact = libs.protobuf.protoc.get().toString()
+    }
+    generateProtoTasks {
+        all().forEach { task ->
+            task.builtins {
+                create("java") {
+                    option("lite")
+                }
+                create("kotlin") {
+                    option("lite")
+                }
+            }
+        }
+    }
+}
+
 dependencies {
     implementation(libs.accompanist.permissions)
     implementation(libs.androidx.activity)
@@ -213,6 +233,7 @@ dependencies {
     api(libs.bundles.androidx.biometric)
 
     api(libs.keystone)
+    implementation(libs.protobuf.kotlin.lite)
 
     testImplementation(libs.kotlin.test)
     testImplementation("io.ktor:ktor-client-mock")