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feat(Duolingo): Add Unlock Duolingo Super
patch (#2862)
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parent
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package app.revanced.patches.duolingo.unlocksuper.fingerprints
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import app.revanced.patcher.extensions.or
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import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
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import com.android.tools.smali.dexlib2.AccessFlags
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import com.android.tools.smali.dexlib2.Opcode
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object IsUserSuperMethodFingerprint : MethodFingerprint(
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returnType = "Ljava/lang/Object",
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parameters = listOf("Ljava/lang/Object"),
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accessFlags = AccessFlags.PUBLIC or AccessFlags.FINAL,
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strings = listOf("user"),
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opcodes = listOf(Opcode.IGET_BOOLEAN),
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)
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package app.revanced.patches.duolingo.unlocksuper.fingerprints
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import app.revanced.patcher.extensions.or
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import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
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import com.android.tools.smali.dexlib2.AccessFlags
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import com.android.tools.smali.dexlib2.Opcode
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object UserSerializationMethodFingerprint : MethodFingerprint(
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returnType = "V",
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accessFlags = AccessFlags.PUBLIC or AccessFlags.CONSTRUCTOR,
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strings = listOf(
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"betaStatus",
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"coachOutfit",
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"globalAmbassadorStatus",
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),
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opcodes = listOf(
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Opcode.MOVE_FROM16,
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Opcode.IPUT_BOOLEAN,
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),
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)
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package app.revanced.patches.duolingo.unlocksuper.patch
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import app.revanced.extensions.toErrorResult
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import app.revanced.patcher.annotation.Compatibility
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import app.revanced.patcher.annotation.Description
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import app.revanced.patcher.annotation.Name
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import app.revanced.patcher.annotation.Package
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import app.revanced.patcher.data.BytecodeContext
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import app.revanced.patcher.extensions.InstructionExtensions.getInstructions
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import app.revanced.patcher.extensions.InstructionExtensions.replaceInstructions
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import app.revanced.patcher.patch.BytecodePatch
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import app.revanced.patcher.patch.PatchException
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import app.revanced.patcher.patch.annotations.Patch
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import app.revanced.patcher.util.proxy.mutableTypes.MutableMethod
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import app.revanced.patches.duolingo.unlocksuper.fingerprints.IsUserSuperMethodFingerprint
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import app.revanced.patches.duolingo.unlocksuper.fingerprints.UserSerializationMethodFingerprint
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import com.android.tools.smali.dexlib2.Opcode
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import com.android.tools.smali.dexlib2.builder.instruction.BuilderInstruction22c
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import com.android.tools.smali.dexlib2.iface.reference.Reference
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@Patch
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@Name("Unlock Duolingo Super")
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@Description("Unlocks Duolingo Super features.")
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@Compatibility([Package("com.duolingo")])
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class UnlockDuolingoSuperPatch : BytecodePatch(
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listOf(UserSerializationMethodFingerprint, IsUserSuperMethodFingerprint)
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) {
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/* First find the reference to the isUserSuper field, then patch the instruction that assigns it to false.
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* This strategy is used because the method that sets the isUserSuper field is difficult to fingerprint reliably.
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*/
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override fun execute(context: BytecodeContext) {
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// Find the reference to the isUserSuper field.
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val isUserSuperReference = IsUserSuperMethodFingerprint
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.result
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?.mutableMethod
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?.getInstructions()
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?.filterIsInstance<BuilderInstruction22c>()
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?.firstOrNull { it.opcode == Opcode.IGET_BOOLEAN }
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?.reference
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?: throw IsUserSuperMethodFingerprint.toErrorResult()
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// Patch the instruction that assigns isUserSuper to true.
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UserSerializationMethodFingerprint
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.result
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?.mutableMethod
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?.apply {
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replaceInstructions(
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indexOfReference(isUserSuperReference) - 1,
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"const/4 v2, 0x1"
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)
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}
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?: throw UserSerializationMethodFingerprint.toErrorResult()
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}
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private companion object {
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private fun MutableMethod.indexOfReference(reference: Reference) = getInstructions()
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.filterIsInstance<BuilderInstruction22c>()
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.filter { it.opcode == Opcode.IPUT_BOOLEAN }.indexOfFirst { it.reference == reference }.let {
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if (it == -1) throw PatchException("Could not find index of instruction with supplied reference.")
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else it
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}
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}
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}
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