Data stores

The app uses the following data stores:

1. Blob storage (Azure storage account)
2. Table storage (Azure storage account)
3. Application Insights

All these resources are created in your Azure subscription. None are hosted directly by Microsoft.

Azure storage account

Blob

The blob storage contains:

• Images for the custom stickers. Both active stickers (that is, those returned by the messaging extension) and inactive/soft deleted stickers are in the blob storage. The images are named using generated GUIDs.
• JSON configuration file (stickers.json) that defines which images are returned by the messaging extension.

The images and configuration file are located in a single container. The name of the container is controlled by the StickersBlobContainerName app setting, which is set to "stickers" by default.

The images must be accessible to the Teams URL previewer, so the permissions on this container are set to enable anonymous access to the individual blobs (PublicAccess = BlobContainerPublicAccessType.Blob).

Table

The table storage tracks the stickers stored in the blob, and their status.

Column	Description
PartitionKey	Fixed to "default"
RowKey	GUID
ImageUrl	URL to the image in blob storage
Name	Sticker name
Keywords	Comma-separated list of search keywords
Index	Position within the list of stickers
State	Active = returned by messaging extension SoftDeleted = not returned by messaging extension (but still in blob storage)

Application Insights

See Telemetry