add billing hack

billing-hack/.gitignore

@@ -0,0 +1,14 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx

billing-hack/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>BillingHack</name>
+	<comment>Project billing-hack created by Buildship.</comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.buildship.core.gradleprojectbuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.buildship.core.gradleprojectnature</nature>
+	</natures>
+	<filteredResources>
+		<filter>
+			<id>1701744431802</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
+</projectDescription>

billing-hack/.settings/org.eclipse.buildship.core.prefs

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+arguments=--init-script /home/kuhakupixel/.config/coc/extensions/coc-java-data/server/config_linux/org.eclipse.osgi/51/0/.cp/gradle/init/init.gradle
+auto.sync=false
+build.scans.enabled=false
+connection.gradle.distribution=GRADLE_DISTRIBUTION(WRAPPER)
+connection.project.dir=
+eclipse.preferences.version=1
+gradle.user.home=
+java.home=/usr/lib/jvm/java-17-openjdk-amd64
+jvm.arguments=
+offline.mode=false
+override.workspace.settings=true
+show.console.view=true
+show.executions.view=true

billing-hack/README.md

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+# Billing Hack
+local android purchase server for supporting billing hack
+
+updated version of [billing-hack](https://github.com/dschuermann/billing-hack) licensed under [Apache 2](https://github.com/dschuermann/billing-hack/issues/1#issuecomment-67127884)
+
+so it will work on newer version of [billing client](https://developer.android.com/reference/com/android/billingclient/api/BillingClient)
+with improvements such as 
+
+- Updated AIDL to be compatable with newer billing client's version
+
+- implement `getPurchases` to store history of purchases
+
+- set transaction code explicitly in AIDL to remain compatable with  
+  newer version of `com.android.vending` (google playstore)
+
+
+## Reference
+
+![Billing Client AIDL Reference](./billingReferenceEnglish.pdf)

billing-hack/app/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17/"/>
+	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
+	<classpathentry kind="output" path="bin/default"/>
+</classpath>

billing-hack/app/.gitignore

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+/build

billing-hack/app/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>BillingHack-app</name>
+	<comment>Project BillingHack-app created by Buildship.</comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.buildship.core.gradleprojectbuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.buildship.core.gradleprojectnature</nature>
+	</natures>
+	<filteredResources>
+		<filter>
+			<id>1701744431804</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
+</projectDescription>

billing-hack/app/.settings/org.eclipse.buildship.core.prefs

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+connection.project.dir=..
+eclipse.preferences.version=1