rc-purchase-flow
Use this skill when implementing a RevenueCat purchase on Android. Covers awaitPurchase, PurchasesTransactionException, reading CustomerInfo entitlements to grant access, restoring purchases, and the six SDK managed steps that happen inside a single call.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/revenuecat/ai-toolkit --skill rc-purchase-flow- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads rc-purchase-flow automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Purchase Flow
A RevenueCat purchase on Android is two lines of code. The SDK handles the billing params, the Play sheet, the purchase token round trip, server side verification, and acknowledgment. You decide which package to pass in and what to do with the returned entitlements.
Phase 1: Understand what awaitPurchase() does
One call to Purchases.sharedInstance.awaitPurchase(params) runs six steps under the hood. You do not write any of this.
| Step | What happens |
|---|---|
| 1 | Builds BillingFlowParams with the correct ProductDetailsParams from your Package |
| 2 | Calls BillingClient.launchBillingFlow() against the activity you passed |
| 3 | Suspends until the PurchasesUpdatedListener result arrives |
| 4 | If OK, posts the Play purchase token to the RevenueCat backend |
| 5 | Backend verifies via purchases.subscriptionsv2.get or purchases.products.get |
| 6 | SDK acknowledges (subs or non-consumables) or consumes (consumables) within the 3 day Google window |
The call returns PurchaseResult(storeTransaction, customerInfo). Retriable failures are retried automatically.
See the Purchase Flow chapter on revenuecat.com for the six-step diagram and the full picture.
Phase 2: Prepare the package
You need a Package from offerings before you can purchase. Fetch offerings, let your UI pick one, and hold the activity.
val offerings = Purchases.sharedInstance.awaitOfferings()
val pkg = offerings.current?.monthly ?: return
If you need a specific offer instead of the default, resolve a SubscriptionOption and pass that to PurchaseParams.Builder instead of the package.
val option = pkg.product.subscriptionOptions
?.firstOrNull { it.tags.contains("promo_50_off") }
?: pkg.product.defaultOption
?: return
For EU personalized pricing, chain .isPersonalizedPrice(true) on the builder so Play shows the customized price notice.
Phase 3: Execute the purchase
Build the params, await the purchase, read customerInfo to gate access, and handle the two expected error branches.
try {
val result = Purchases.sharedInstance.awaitPurchase(
PurchaseParams.Builder(activity, pkg).build()
)
val customerInfo = result.customerInfo
if (customerInfo.entitlements["pro"]?.isActive == true) {
navigateToApp()
}
} catch (e: PurchasesTransactionException) {
when {
e.userCancelled -> { /* backed out, do nothing */ }
e.error.code == PurchasesErrorCode.ProductAlreadyPurchasedError ->
showMessage("You already have this subscription")
else -> showError(e.error.message)
}
}
Rules for this block:
PurchaseResultis@Poko. Access fields asresult.customerInfoandresult.storeTransaction. Do not destructure withval (transaction, customerInfo) = result.customerInfo.entitlements["<id>"]?.isActive == trueis the gate. Do not checkstoreTransactionto decide access.PurchasesTransactionExceptionis the only exception type thrown byawaitPurchase. Catch it, branch onuserCancelledfirst, then one.error.code.- User cancellation is not an error to surface. Swallow it.
If you prefer callbacks over coroutines, purchaseWith(params, onError, onSuccess) is the equivalent entry point.
Phase 4: Inspect StoreTransaction only if you need it
result.storeTransaction is available but usually unused. customerInfo is the source of truth for entitlements. If you need transaction level data for logging or your own backend:
| Field | Type | Notes |
|---|---|---|
orderId | String? | Null for restored purchases |
purchaseToken | String | Raw Play purchase token |
productIds | List<String> | Product IDs in the transaction |
purchaseTime | Long | Epoch millis |
type | ProductType | SUBS or INAPP |
Phase 5: Restore on reinstall or device switch
Restore runs queryPurchasesAsync(), posts everything found to RevenueCat, and returns the fresh CustomerInfo. Gate access the same way you do after a purchase.
try {
val customerInfo = Purchases.sharedInstance.awaitRestore()
if (customerInfo.entitlements["pro"]?.isActive == true) {
navigateToApp()
} else {
showMessage("No active purchases found")
}
} catch (e: PurchasesException) {
showError(e.error.message)
}
Note the exception type. awaitRestore() throws PurchasesException, not PurchasesTransactionException. There is no userCancelled flag to check because no billing sheet is shown.
Exception types at a glance
| Call | Thrown exception | Has userCancelled? |
|---|---|---|
awaitPurchase(params) | PurchasesTransactionException | Yes |
awaitRestore() | PurchasesException | No |
References
FAQ
What does the rc-purchase-flow skill do?
Use this skill when implementing a RevenueCat purchase on Android. Covers awaitPurchase, PurchasesTransactionException, reading CustomerInfo entitlements to grant access, restoring purchases, and the six SDK managed steps that happen inside a single call.
How do I install rc-purchase-flow?
Run npx skills add https://github.com/revenuecat/ai-toolkit --skill rc-purchase-flow in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/rc-purchase-flow/ (personal) or .claude/skills/rc-purchase-flow/ (project).
Which AI agents can use rc-purchase-flow?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is rc-purchase-flow safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains rc-purchase-flow?
It is published by revenuecat in revenuecat/ai-toolkit. It has 637 recorded installs.
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