[Bug] expo-iap 3.1+ incompatible with Expo SDK 53 due to Kotlin version conflict

[KimWash]

Is there an existing issue for this?

• I have searched the existing issues and found no similar bug report.

Latest Version Check

• I confirmed this issue reproduces on the latest version of expo-iap.

Current Behavior

Build fails with Kotlin metadata version mismatch error:

e: file:///.../kotlin-stdlib-2.2.10.jar!/META-INF/kotlin-stdlib.kotlin_module 
Module was compiled with an incompatible version of Kotlin. 
The binary version of its metadata is 2.2.0, expected version is 2.0.0.
Execution failed for task ':expo:compileReleaseKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.compilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
   > Internal compiler error. See log for more details

Expected Behavior

Build should complete successfully.

How to Reproduce

Create a new Expo SDK 53 project
Install expo-iap
`npx expo install expo-iap`
Add to plugins in app.config.js

plugins: ["expo-iap"]

Run prebuild and build
`npx expo prebuild --clean --platform android`
`eas build --local --platform android`

Screenshots

Platforms

Bare React Native

expo-iap version

^3.4.0

Expo SDK Version

~53.0.20

React Native Version

0.79.7

Xcode version

No response

iOS target

No response

Android version

No response

Logs

[RUN_GRADLEW] > Task :expo:compileReleaseKotlin FAILED
[RUN_GRADLEW] e: org.jetbrains.kotlin.util.FileAnalysisException: While analysing /private/var/folders/n0/h_d7ry_94dz_vptg40y_23pw0000gn/T/eas-build-local-nodejs/4e68bced-8046-4f5a-a395-e76a6719ecf7/build/node_modules/expo/android/src/main/java/expo/modules/ApplicationLifecycleDispatcher.kt:18:3: java.lang.IllegalArgumentException: source must not be null
[RUN_GRADLEW]   at org.jetbrains.kotlin.util.AnalysisExceptionsKt.wrapIntoFileAnalysisExceptionIfNeeded(AnalysisExceptions.kt:57)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.FirCliExceptionHandler.handleExceptionOnFileAnalysis(Utils.kt:249)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.pipeline.AnalyseKt.runCheckers(analyse.kt:46)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.pipeline.FirUtilsKt.resolveAndCheckFir(firUtils.kt:77)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.pipeline.FirUtilsKt.buildResolveAndCheckFirViaLightTree(firUtils.kt:88)
[RUN_GRADLEW]   at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.JvmCompilerPipelineKt.compileModuleToAnalyzedFir(jvmCompilerPipeline.kt:319)
[RUN_GRADLEW]   at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.JvmCompilerPipelineKt.compileModulesUsingFrontendIrAndLightTree(jvmCompilerPipeline.kt:118)
[RUN_GRADLEW]   at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:148)
[RUN_GRADLEW]   at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:43)
[RUN_GRADLEW]   at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:103)
[RUN_GRADLEW]   at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:49)
[RUN_GRADLEW]   at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
[RUN_GRADLEW]   at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:464)
[RUN_GRADLEW]   at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:73)
[RUN_GRADLEW]   at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.doCompile(IncrementalCompilerRunner.kt:506)
[RUN_GRADLEW]   at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:423)
[RUN_GRADLEW]   at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileNonIncrementally(IncrementalCompilerRunner.kt:301)
[RUN_GRADLEW]   at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:129)
[RUN_GRADLEW]   at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:675)
[RUN_GRADLEW]   at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:92)
[RUN_GRADLEW]   at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1660)
[RUN_GRADLEW]   at jdk.internal.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
[RUN_GRADLEW]   at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[RUN_GRADLEW]   at java.base/java.lang.reflect.Method.invoke(Method.java:568)
[RUN_GRADLEW]   at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:360)
[RUN_GRADLEW]   at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
[RUN_GRADLEW]   at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
[RUN_GRADLEW]   at java.base/java.security.AccessController.doPrivileged(AccessController.java:712)
[RUN_GRADLEW]   at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
[RUN_GRADLEW]   at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:587)
[RUN_GRADLEW]   at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828)
[RUN_GRADLEW]   at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:705)
[RUN_GRADLEW]   at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
[RUN_GRADLEW]   at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:704)
[RUN_GRADLEW]   at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
[RUN_GRADLEW]   at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
[RUN_GRADLEW]   at java.base/java.lang.Thread.run(Thread.java:833)
[RUN_GRADLEW] Caused by: java.lang.IllegalArgumentException: source must not be null
[RUN_GRADLEW]   at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.requireNotNull(KtDiagnosticReportHelpers.kt:68)
[RUN_GRADLEW]   at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.reportOn(KtDiagnosticReportHelpers.kt:39)
[RUN_GRADLEW]   at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.reportOn$default(KtDiagnosticReportHelpers.kt:31)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.checkers.expression.FirIncompatibleClassExpressionChecker.checkSourceElement(FirIncompatibleClassExpressionChecker.kt:50)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.checkers.expression.FirIncompatibleClassExpressionChecker.checkType$checkers(FirIncompatibleClassExpressionChecker.kt:42)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.checkers.type.FirIncompatibleClassTypeChecker.check(FirIncompatibleClassTypeChecker.kt:17)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.check(TypeCheckersDiagnosticComponent.kt:81)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.visitResolvedTypeRef(TypeCheckersDiagnosticComponent.kt:53)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.visitResolvedTypeRef(TypeCheckersDiagnosticComponent.kt:19)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.types.FirResolvedTypeRef.accept(FirResolvedTypeRef.kt:28)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.CheckerRunningDiagnosticCollectorVisitor.checkElement(CheckerRunningDiagnosticCollectorVisitor.kt:24)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitResolvedTypeRef(AbstractDiagnosticCollectorVisitor.kt:248)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitResolvedTypeRef(AbstractDiagnosticCollectorVisitor.kt:30)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.types.FirResolvedTypeRef.accept(FirResolvedTypeRef.kt:28)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.declarations.impl.FirSimpleFunctionImpl.acceptChildren(FirSimpleFunctionImpl.kt:63)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitWithDeclarationAndReceiver(AbstractDiagnosticCollectorVisitor.kt:311)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitSimpleFunction(AbstractDiagnosticCollectorVisitor.kt:118)
[RUN_GRADLEW] at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitSimpleFunction(AbstractDiagnosticCollectorVisitor.kt:30)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.declarations.FirSimpleFunction.accept(FirSimpleFunction.kt:51)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.declarations.impl.FirRegularClassImpl.acceptChildren(FirRegularClassImpl.kt:63)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitWithDeclarationAndReceiver(AbstractDiagnosticCollectorVisitor.kt:311)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitClassAndChildren(AbstractDiagnosticCollectorVisitor.kt:87)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitRegularClass(AbstractDiagnosticCollectorVisitor.kt:92)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitRegularClass(AbstractDiagnosticCollectorVisitor.kt:30)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.declarations.FirRegularClass.accept(FirRegularClass.kt:48)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.declarations.impl.FirFileImpl.acceptChildren(FirFileImpl.kt:57)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitFile(AbstractDiagnosticCollectorVisitor.kt:1151)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitFile(AbstractDiagnosticCollectorVisitor.kt:30)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.declarations.FirFile.accept(FirFile.kt:42)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollector.collectDiagnostics(AbstractDiagnosticCollector.kt:36)
[RUN_GRADLEW]   at org.jetbrains.kotlin.fir.pipeline.AnalyseKt.runCheckers(analyse.kt:34)
[RUN_GRADLEW]   ... 34 more
[RUN_GRADLEW] e: file:///Users/kimwash/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/2.2.10/30de6faa127a4a012db8e71bf1b9c0a99b1402b2/kotlin-stdlib-2.2.10.jar!/META-INF/kotlin-stdlib-jdk7.kotlin_module Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.2.0, expected version is 2.0.0.
[RUN_GRADLEW] e: file:///Users/kimwash/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/2.2.10/30de6faa127a4a012db8e71bf1b9c0a99b1402b2/kotlin-stdlib-2.2.10.jar!/META-INF/kotlin-stdlib-jdk8.kotlin_module Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.2.0, expected version is 2.0.0.
[RUN_GRADLEW] e: file:///Users/kimwash/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/2.2.10/30de6faa127a4a012db8e71bf1b9c0a99b1402b2/kotlin-stdlib-2.2.10.jar!/META-INF/kotlin-stdlib.kotlin_module Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.2.0, expected version is 2.0.0.
[RUN_GRADLEW] > Task :react-native-gesture-handler:configureCMakeRelWithDebInfo[arm64-v8a]
[RUN_GRADLEW] [Incubating] Problems report is available at: file:///private/var/folders/n0/h_d7ry_94dz_vptg40y_23pw0000gn/T/eas-build-local-nodejs/4e68bced-8046-4f5a-a395-e76a6719ecf7/build/apps/expo/android/build/reports/problems/problems-report.html
[RUN_GRADLEW] Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.
[RUN_GRADLEW] You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.
[RUN_GRADLEW] For more on this, please refer to https://docs.gradle.org/8.13/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.
[RUN_GRADLEW] 816 actionable tasks: 815 executed, 1 up-to-date
[RUN_GRADLEW] FAILURE: Build failed with an exception.
[RUN_GRADLEW] * What went wrong:
[RUN_GRADLEW] Execution failed for task ':expo:compileReleaseKotlin'.
[RUN_GRADLEW] > A failure occurred while executing org.jetbrains.kotlin.compilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
[RUN_GRADLEW]    > Internal compiler error. See log for more details
[RUN_GRADLEW] * Try:
[RUN_GRADLEW] > Run with --stacktrace option to get the stack trace.
[RUN_GRADLEW] > Run with --info or --debug option to get more log output.
[RUN_GRADLEW] > Run with --scan to get full insights.
[RUN_GRADLEW] > Get more help at https://help.gradle.org.
[RUN_GRADLEW] BUILD FAILED in 3m 1s
[RUN_GRADLEW] Error: Gradle build failed with unknown error. See logs for the "Run gradlew" phase for more information.

Additional Context

Dependency Chain

expo-iap 3.4.0
└── openiap-google 1.3.21
└── billing-ktx 8.1.0+
└── kotlin-stdlib 2.2.10 (requires Kotlin 2.2.0 compiler)

The Problem

• Expo SDK 53 uses Kotlin 2.0.21
• Google Play Billing Library 8.1.0 (released Nov 2025) requires Kotlin 2.2.0
• The release notes state "supports Kotlin 2.2.0", but it's actually mandatory, not optional

expo-iap	openiap-google	billing-ktx	Kotlin Required
3.0.x	1.1.12	8.0.x	2.0.21 ✅
3.1.x+	1.3.x	8.1.0+	2.2.0 ❌

Verified via Maven Central.

Temporary fix

I downgraded version to 3.0.0. I looked up elease notes but theres too many 'v8 support' phrases.
Check homepage for actual versioning guide. 😭

[KimWash]

Expo 53 users must use expo-iap 3.0.0!

[hyochan]

@KimWash Did you checkout here? https://hyochan.github.io/expo-iap/getting-started/installation#important-for-expo-managed-workflow

{
  "plugins": [
    "expo-iap",
    [
      "expo-build-properties",
      {
        "android": {
          "kotlinVersion": "2.2.0"
        }
      }
    ]
  ]
}

[KimWash]

I attempted to set the Kotlin version to 2.2.0. I'm not sure how Expo defines the Kotlin version on the native side, but for some reason, I got this error: Failed to apply plugin 'expo-root-project' > Key 2.2.0 is missing in the map.

kotlinVersion to 2.1.20 works fine.

I even tried explicitly downgrading the billing library to 8.0.0 which is using kotlin 2.1.20 using this guide, but that didn't work either. Eventually, I had to dig through the artifacts of dependencies to find a compatible version.
https://hyochan.github.io/expo-iap/getting-started/installation#option-1-downgrade-billing-library-recommended-for-sdk-52

[hyochan]

@KimWash Thanks for the detailed report! I've investigated and confirmed the issue.

Root Cause

billing-ktx 8.1.0 has a direct dependency on kotlin-stdlib 2.2.10, which requires Kotlin 2.2.0 compiler. This is not just "supports" but actually required - Google's release notes are misleading when they say "supports Kotlin 2.2.0".

Expo SDK 53's expo-build-properties doesn't support Kotlin 2.2.0 override (you get Key 2.2.0 is missing in the map error), so even manual configuration doesn't work.

Solution: Try v3.4.1-rc.1

I've added a new config plugin option android.openiapVersion that lets you downgrade to an older OpenIAP version compatible with Kotlin 2.0.x.

Install the release candidate:

npm install expo-iap@next

Configure in app.json:

{
  "expo": {
    "plugins": [
      [
        "expo-iap",
        {
          "android": {
            "openiapVersion": "1.3.11"
          }
        }
      ]
    ]
  }
}

Then run:

npx expo prebuild --clean

Version Compatibility

openiap-google	Billing Library	Kotlin Required	Status
1.3.21 (latest)	8.1.0+	2.2.0	❌ Not compatible with SDK 53
1.3.11	8.0.x	2.0.x	⚠️ Works with SDK 53 (limited features)

⚠️ Note: This is a workaround. Using openiap-google 1.3.11 means you won't have access to features introduced in Billing Library 8.1.0+. We recommend upgrading to Expo SDK 54+ when available, which should include native Kotlin 2.2.0 support.

Please test and let me know if this resolves your build issue!

[KimWash]

Thank you for your contribution to open source.

I noticed that expo-iap/android/build.gradle dynamically implements the openiap dependency based on openiap-versions.json. Even if I explicitly define a specific version in my project's build.gradle, Gradle's resolution strategy seems to prioritize the higher version specified by the library.

node_modules/expo-iap/android/build.gradle

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7"

    // Determine which OpenIAP dependency to use based on horizonEnabled flag
    def horizonEnabled = project.findProperty('horizonEnabled')?.toBoolean() ?: false

    // Use OpenIAP Google module only; avoid direct BillingClient dependency
    if (findProject(":openiap-google") != null) {
      implementation project(":openiap-google")
    } else if (horizonEnabled) {
      // Use openiap-google-horizon for Meta Quest when horizonEnabled is true
      implementation "io.github.hyochan.openiap:openiap-google-horizon:${googleVersionString}"
    } else {
      // Fallback to published artifact when local project isn't linked
      implementation "io.github.hyochan.openiap:openiap-google:${googleVersionString}"
    }
}

{project}/android/build.gradle

Furthermore, forcing a downgrade to an older version (e.g., openiap:1.3.11) causes compatibility issues. The current expo-iap implementation uses addDeveloperProvidedBillingListener (and other Billing Client 8.3.0+ features), which creates a breaking change with older openiap versions.

node_module/sexpo-iap/android/src/main/java/expo/modules/iap/ExpoIapHelper.kt

        // Developer Provided Billing listener for External Payments (8.3.0+)
        openIap.addDeveloperProvidedBillingListener { details ->
            safeEmitEvent(
                module,
                scope,
                connectionReady,
                pendingEvents,
                eventDeveloperProvidedBilling,
                details.toJson(),
                eventPurchaseError,
                "developer-billing-error",
                "Failed to process developer provided billing",
                "DEVELOPER_PROVIDED_BILLING",
            )
        }
    }

here's a log. this time, i tested without eas, using ./gradle assembleRelease.

> Task :expo-iap:compileReleaseKotlin FAILED
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapHelper.kt:254:17 Unresolved reference 'addDeveloperProvidedBillingListener'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapHelper.kt:254:55 Cannot infer type for this parameter. Please specify it explicitly.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapHelper.kt:261:25 Unresolved reference 'toJson'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:22:24 Unresolved reference 'VerifyPurchaseGoogleOptions'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:38:24 Unresolved reference 'BillingProgramAndroid'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:39:24 Unresolved reference 'ExternalLinkLaunchModeAndroid'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:40:24 Unresolved reference 'ExternalLinkTypeAndroid'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:41:24 Unresolved reference 'LaunchExternalLinkParamsAndroid'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:455:71 Cannot infer type for this parameter. Please specify it explicitly.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:455:75 Cannot infer type for this parameter. Please specify it explicitly.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:456:33 Unresolved reference 'VerifyPurchaseGoogleOptions'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:475:33 No parameter with name 'google' found.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:475:33 No value passed for parameter 'sku'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:552:51 Unresolved reference 'isBillingProgramAvailable'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:572:51 Unresolved reference 'createBillingProgramReportingDetails'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:616:29 Unresolved reference 'OpenIapLaunchExternalLinkParams'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:623:51 Unresolved reference 'launchExternalLink'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:643:53 Unresolved reference 'OpenIapBillingProgram'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:645:33 Unresolved reference 'OpenIapBillingProgram'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:646:40 Unresolved reference 'OpenIapBillingProgram'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:647:36 Unresolved reference 'OpenIapBillingProgram'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:648:38 Unresolved reference 'OpenIapBillingProgram'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:649:21 Unresolved reference 'OpenIapBillingProgram'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:652:58 Unresolved reference 'OpenIapExternalLinkLaunchMode'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:654:52 Unresolved reference 'OpenIapExternalLinkLaunchMode'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:655:42 Unresolved reference 'OpenIapExternalLinkLaunchMode'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:656:21 Unresolved reference 'OpenIapExternalLinkLaunchMode'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:659:52 Unresolved reference 'OpenIapExternalLinkType'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:661:48 Unresolved reference 'OpenIapExternalLinkType'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:662:39 Unresolved reference 'OpenIapExternalLinkType'.
e: file:///Users/{username}/Projects/{project-name}/node_modules/expo-iap/android/src/main/java/expo/modules/iap/ExpoIapModule.kt:663:21 Unresolved reference 'OpenIapExternalLinkType'.

[Incubating] Problems report is available at: file:///Users/{username}/Projects/{project-name}/apps/expo-app/android/build/reports/problems/problems-report.html

FAILURE: Build failed with an exception.

So I've decided to stick with expo-iap 3.0.0 for now.
Given the current dependency conflicts, I will wait until NativeWind provides stable support for Expo SDK 54 before attempting to upgrade again.

[felipewizeline]

Expo IAP + Kotlin Compatibility Fix

Problem

When integrating expo-iap with Expo SDK 53+, you may encounter Kotlin metadata incompatibility errors:

e: file:///.../kotlin-stdlib-2.2.10.jar!/META-INF/kotlin-stdlib-jdk8.kotlin_module Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.2.0, expected version is 2.0.0.

This happens because:

• expo-iap uses Google Play Billing Library v8+ (compiled with Kotlin 2.2.0)
• Expo SDK 53 uses Kotlin 2.0.21 by default
• Version mismatch causes metadata incompatibility

Solution

Use compatible versions and a custom plugin to force the correct billing library version.

1. Compatible Versions

{
  "expo": "^53.0.20",
  "expo-iap": "~3.0.0"
}

2. Expo Configuration

// app.config.ts
export default {
  expo: {
    // ... other configurations
    android: {
      kotlinVersion: '2.0.21',  // Compatible with Expo SDK 53
      compileSdkVersion: 35,
      targetSdkVersion: 35,
      minSdkVersion: 24,
    },
    plugins: [
      // ... other plugins
      './plugins/android/withBillingLibraryDowngrade',
      'expo-iap',
    ]
  }
}

3. Custom Plugin

Create plugins/android/withBillingLibraryDowngrade.ts:

import { ConfigPlugin, withGradleProperties } from '@expo/config-plugins'

const withBillingLibraryDowngrade: ConfigPlugin = (config) => {
  return withGradleProperties(config, (config) => {
    // Force billing library version compatible with Kotlin 2.0.x
    config.modResults.push({
      type: 'property',
      key: 'billingClientVersion',
      value: '5.2.1',  // Compatible with Kotlin 2.0.21
    })
    return config
  })
}

export default withBillingLibraryDowngrade

4. Implementation Steps

1. Create the plugin at plugins/android/withBillingLibraryDowngrade.ts

2. Update package.json with compatible versions:

   npm install expo@^53.0.20 expo-iap@~3.0.0

3. Update app.config.ts with kotlinVersion and plugin

4. Clean and rebuild:

   rm -rf android ios node_modules
   npm install
   npx expo prebuild --clean
   npx expo run:android

Compatibility Matrix

Component	Version	Kotlin Support	Status
Expo SDK	53.0.20	2.0.21	✅ Stable
expo-iap	3.0.0	2.0.x	✅ Compatible
Billing Library	5.2.1	2.0.x	✅ Compatible
Kotlin	2.0.21	Auto	✅ Working

Benefits

• ✅ No Kotlin metadata errors
• ✅ Successful Android builds
• ✅ Full expo-iap functionality
• ✅ Expo SDK 53 compatibility
• ✅ Stable billing library version

Alternative Solutions

Option 1: Force Kotlin 2.2.0 (Higher Risk)

// app.config.ts
android: {
  kotlinVersion: '2.2.0', // May cause other compatibility issues
}

Option 2: Downgrade Expo SDK (Not Recommended)

{
  "expo": "^52.0.0"  // Older SDK, less features
}

Testing

After implementation, verify expo-iap works:

import { useIAP } from 'expo-iap'

function TestComponent() {
  const { connected } = useIAP()
  console.log('IAP Status:', connected) // Should be true
  return null
}

References

• expo-iap GitHub Issue #300
• expo-iap Documentation
• Expo SDK Compatibility

[hyochan]

Thanks @KimWash for the detailed dependency analysis — it pinpointed the exact chain (billing-ktx → kotlin-stdlib 2.2 metadata). Development has moved to https://github.com/hyodotdev/openiap (source: libraries/expo-iap, docs: https://openiap.dev/docs/setup/expo), so this repo is being archived.

Two changes since resolve this: openiap-google no longer depends on billing-ktx (the artifact that forced the Kotlin 2.2 metadata mismatch) and uses the callback Billing API only, and the supported baseline is now Expo SDK 54+, where Kotlin 2.2 works with the default toolchain or via expo-build-properties. Expo SDK 53 stays limited to expo-iap 3.0.x, as you found.

Please retry with the latest expo-iap on SDK 54+, and if anything persists, open an issue at https://github.com/hyodotdev/openiap/issues.