.clearTransaction() throwing "Cannot finish a purchasing transaction"

[ilyakar]

Version of react-native-iap

2.4.8

Version of react-native

0.57.1

Platforms you faced the error (IOS or Android or both?)

iOS

Expected behavior

Purchase to go through

Actual behavior

Crashes sometimes when .clearTransaction() above .buyProduct()

Tested environment (Emulator? Real Device?)

Real device

Steps to reproduce the behavior

The doc states:

await RNIap.clearTransaction(); // add this method at the start of purchase.
const purchase = await RNIap.buyProduct(...)
...

Not having the .clearTransaction causes "Already bought this product" for consumables, having the .clearTransaction throws "Cannot finish a purchasing transaction" (sometimes).

What's the solution?

[hyochan]

@ilyakar Can you try clearProducts?

[javascripter]

We observed the same error in our production app too. In our case however, this happened for .clearTransaction() above .buySubscription().
I'm not too sure whether .clearTransaction() is really required for auto-renewable subscriptions, but we have similar code for consumables too.

If this should be a separate issue, please tell me so.

Version of react-native-iap

2.4.8

Version of react-native

0.59.8

Platforms you faced the error (IOS or Android or both?)

iOS

Tested environment (Emulator? Real Device?)

Real device

Steps to reproduce the behavior

let subscription = null

async function subscribe() {
  let purchase = null

  try {
    if (subscription) {
      subscription.remove()
      subscription = null
    }
    await RNIap.clearTransaction()

    purchase = await RNIap.buySubscription(SUBSCRIPTION_SKU)
  } catch (ex) {
    purchase = await new Promise((resolve, reject) => {
      subscription = RNIap.addAdditionalSuccessPurchaseListenerIOS(
        purchase => {
          // ... (code for checking item sku)
          resolve(purchase)
          subscription.remove()
          subscription = null
        }
      )
    })
  }

  if (!purchase) {
    return
  }
  // purchased 
}

The error is thrown only sometimes. We suspect calling subscribe again while subscribe is running may be causing errors

[WJimmyCook]

@javascripter I'm having the same error occasionally and I think you are right about calling subscribe again while subscribe is running. For me, I believe it happens because the user is quickly tapping the purchase button two or more times before the purchase confirmation screen from apple pops up.

[curiousdustin]

I am getting this error, and associated crash.

I am using react-native-iap 2.4.4, and I don't necessarily want to upgrade to 3.x yet.

I am calling clearTransaction() before buySubscription().

It is only crashing occasionally.

I am only using subscription IAP.

Like @javascripter , it is unclear to me if clearTransaction() is needed for subscriptions.

Is there anything I can do to avoid this issue and crash?

[hyochan]

Might be related to #581. We are looking forward to digging it.