Iap devtest payment

Vega Open Beta Bug Reports
1

1. Summary

We are unable to complete purchases in Amazon IAP DevTest mode. The purchase flow is initiated successfully, but the response returns an invalid result with receipt: null and responseCode: 4.

This issue is blocking current development, as we cannot test IAP flows in DevTest mode.

This problem was previously encountered and resolved after upgrading to SDK version 22, but it has now started occurring again.

App Name: frndly tv

Bug Severity

  • Blocks current development

2. Steps to Reproduce

  1. Launch the app on Vega / Fire TV device
  2. Ensure IAP is configured in DevTest mode
  3. Initiate purchase for SKU: ftv-classic-monthly
  4. Observe logs and purchase response

3. Observed Behavior

  • Purchase flow starts successfully

  • SDK returns invalid response

  • Receipt and user data are null

  • Response code is 4

  • App logs indicate production mode instead of DevTest

Logs:

[INFO] Response received from IAP Service
requestId: 861147c5-b27b-4a60-a29d-ce8407215bd1

[ERROR] Invalid response received from IAP Service

[INFO] IAP config file not found:
Path: /scratch/amazon.config.json
→ App is running in PRODUCTION mode

[INFO] Purchase timing:
total time → NaN ms

Response:
{
  receipt: null,
  requestId: "861147c5-b27b-4a60-a29d-ce8407215bd1",
  responseCode: 4,
  userData: null
}

4. Environment

Please fill out the fields related to your bug below:

  • **SDK Version:**Active SDK Version: 0.22.6150
    Vega CLI Version: 1.2.18

  • App State: [Foreground/Background]

  • OS Information: NAME=“OS”
    OE_VERSION=“4.0.0”
    OS_MAJOR_VERSION=“1”
    OS_MINOR_VERSION=“1”
    RELEASE_ID=“14”
    OS_VERSION=“1.1”
    BRANCH_CODE=“TV Ship day60”
    BUILD_DESC=“OS 1.1 (TV Ship day60/101)”
    BUILD_FINGERPRINT=“4.0.249302.0(3072cab629675a74)/101N:user/release-keys”
    BUILD_VARIANT=“user”
    BUILD_TAGS=“release-keys”
    BUILD_DATE=“Sat Mar 14 22:24:12 UTC 2026”
    BUILD_TIMESTAMP=“1773527052”
    VERSION_NUMBER=“1401010010120”

3

Hi @YuppTV,

Thank you for the detailed bug report on IAP devtest payment.

From your logs, the key indicator is:

[INFO] IAP config file not found:
Path: /scratch/amazon.config.json
→ App is running in PRODUCTION mode

This means the DevTest configuration is not being picked up, causing the app to fall back to production mode, which explains the responseCode: 4 and null receipt/userData.

Could you please confirm:

  • Is the amazon.config.json file included in your app package and placed in the correct location?
  • Has anything changed in your build/packaging process since the issue was last resolved with SDK 0.22?
  • Can you share full device logs (journalctl) captured during the purchase attempt so we can investigate further?

Our team is investigating this issue and will provide an update as soon as we have more information.

Thanks for helping us improve the Vega platform.

Warm regards,
Aishwarya

5

Hi @amen ,
1.Yes, amazon.config.json is present in our project root with the content {"debug.amazon.sandboxmode": "debug"}. However, from the device logs, we can see it’s not being found at /scratch/amazon.config.json on the device. This suggests the file is not being packaged into the .vpkg during the build process. Could you please clarify the correct way to ensure amazon.config.json gets placed at /scratch/ on the device for Vega/Kepler builds? Is there a specific manifest.toml configuration or build step required?

2.No changes have been made to our build/packaging process since the issue was last resolved with SDK 0.22.

  1. Regarding device logs: On Vega devices, journalctl is not available in the developer shell — we use loggingctl log -f instead. We have attached the device logs captured during the purchase attempt.

IAP devtest failure.tsx (19.8 KB)

6

Hi @YuppTV,

Thank you for the logs and follow-up.

The amazon.config.json file is not being packaged into the .vpkg during the build. Could you try pushing it directly to the device using the vda commands below and confirm if it resolves the issue?

vda push ./amazon.config.json /tmp/
vda shell cp /tmp/amazon.config.json /tmp/scratch/<your-app-package-name>/

Let us know if this resolves the issue.

Thanks,
Aishwarya

7

Hi @YuppTV,

Just following up on my last message - were you able to try pushing the amazon.config.json directly to the device using the vda commands shared?

Let us know if that resolved the issue.

Thanks,
Aishwarya

8

HI @amen ,
we have tried following commands ,but still same issue reproducing , unable to do payments
1.vega exec vda push ./amazon.config.json /tmp/
./amazon.config.json: 1 file pushed, …kipped. 0.5 MB/s (41 bytes in 0.000s)

2.vega exec vda shell ################################################## ##### Welcome to Developer mode Shell ##### ################################################## sh(com.amazon.dev.shell):/$cp /tmp/amazon.config.json /tmp/scratch/com.tvap p.frndlytv/
cp: /tmp/scratch/com.tvapp.frndlytv/: Is a directory
sh(com.amazon.dev.shell):/$ ls scratch
amazon.config.json

9

Hi @YuppTV,

Thank you for testing this out and sharing the detailed output. I’ll pass the details along to our team and follow up once we have more information.

Thanks,
Aishwarya