Add a new Module for the Liquidity Pool project(s)

Currently, there are gitkeep files for putting in the right directories
and the directory structure is a direct copy paste from the musicdao
project.

This is a simple starting point for further development.

liquidity-pool/.gitignore

@@ -0,0 +1 @@
+/build

liquidity-pool/build.gradle

@@ -0,0 +1,106 @@
+apply plugin: "com.android.library"
+apply plugin: "kotlin-android"
+apply plugin: "kotlin-android-extensions"
+apply plugin: "org.jlleitschuh.gradle.ktlint"
+apply plugin: "androidx.navigation.safeargs.kotlin"
+apply plugin: "kotlinx-serialization"
+
+android {
+    compileSdkVersion 29
+    buildToolsVersion "29.0.3"
+
+    useLibrary "android.test.base"
+    useLibrary "android.test.mock"
+
+    viewBinding {
+        enabled = true
+    }
+
+    defaultConfig {
+        minSdkVersion 22
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        consumerProguardFiles "consumer-rules.pro"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro"
+        }
+    }
+
+// To inline the bytecode built with JVM target 1.8 into
+// bytecode that is being built with JVM target 1.6. (e.g. navArgs)
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+        allWarningsAsErrors = true
+    }
+
+    testOptions {
+        unitTests.returnDefaultValues = true
+    }
+
+    packagingOptions {
+        exclude "META-INF/DEPENDENCIES"
+        exclude "META-INF/LICENSE"
+        exclude "META-INF/LICENSE.txt"
+        exclude "META-INF/license.txt"
+        exclude "META-INF/NOTICE"
+        exclude "META-INF/NOTICE.txt"
+        exclude "META-INF/notice.txt"
+        exclude "META-INF/ASL2.0"
+        exclude("META-INF/*.kotlin_module")
+    }
+}
+
+dependencies {
+    implementation project(":common")
+    implementation project(":ipv8-android")
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+
+    // Android Libraries
+    implementation "androidx.appcompat:appcompat:1.2.0"
+    implementation "androidx.preference:preference:1.1.1"
+    implementation "androidx.core:core-ktx:1.3.1"
+    implementation "androidx.legacy:legacy-support-v4:1.0.0"
+
+    // Layout libraries
+    implementation "com.google.android.material:material:1.2.0"
+    implementation "androidx.constraintlayout:constraintlayout:2.0.0"
+
+    implementation "androidx.navigation:navigation-fragment-ktx:2.3.0"
+    implementation "androidx.navigation:navigation-ui-ktx:2.3.0"
+
+    implementation "com.google.android:flexbox:2.0.1"
+
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.14.0"
+
+    // Testing
+    testImplementation "junit:junit:4.12"
+    testImplementation "io.mockk:mockk:1.9.3"
+    testImplementation "org.jetbrains.kotlinx:kotlinx-coroutines-test:1.3.3"
+
+    androidTestImplementation "androidx.test.ext:junit:1.1.1"
+    androidTestImplementation "androidx.test.espresso:espresso-core:3.2.0"
+}
+
+tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
+    kotlinOptions.freeCompilerArgs += [
+        "-Xuse-experimental=kotlin.Experimental,kotlin.ExperimentalUnsignedTypes",
+        "-Werror" // Set Kotlin compiler warnings as errors
+    ]
+}
+
+tasks.withType(Test) {
+    systemProperty "java.library.path", "./src/main/jniLibs"
+}

liquidity-pool/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

liquidity-pool/src/main/AndroidManifest.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest package="nl.tudelft.trustchain.liquidity">
+</manifest>

liquidity-pool/src/main/java/nl/tudelft/trustchain/liquidity/LiquidityPoolMainActivity.kt

@@ -0,0 +1 @@
+package nl.tudelft.trustchain.liquidity

settings.gradle

@@ -25,3 +25,4 @@ include ':trustchain-voter'
 include ':musicdao'
 include ':peerchat'
 include ':eurotoken'
+include ':liquidity-pool'