# Walrus Blobs



What are Walrus Blobs? [#what-are-walrus-blobs]

Walrus is Sui's decentralised storage solution that Alkimi uses to store every impression, click, and conversion on-chain. Multiple advertising transactions are bundled up and encrypted via Seal (the data encryption and on-chain access control from Sui) to create a Walrus blob containing immutable proof of delivery.

Why Walrus Storage Matters [#why-walrus-storage-matters]

Walrus storage provides on chain:

* Cryptographic proof of ad delivery
* Elimination of payment disputes between advertisers and publishers
* Full transparency and auditability

Data Stored in Walrus Blobs [#data-stored-in-walrus-blobs]

Each blob contains:

* Impression metadata (timestamp, creative details, placement)
* Click verification data
* Conversion tracking information
* Campaign performance metrics