Walrus's smart contract has done something interesting—it not only stores data but also records every operation as on-chain events, creating a monitorable trail.

When a user uploads a data block (blob), an on-chain BlobRegistered event is immediately generated, recording key information such as the blob ID and size. After the storage node completes signing and shard confirmation, a BlobCertified event appears, serving as proof that the data has been truly stored and is available. If the data is deleted or its lifecycle expires, a BlobDeleted event marks this status change again. Each event carries the blob ID and timestamp, serving as irrefutable on-chain evidence of the data's status.

The frequency of these events directly reflects the network's storage activity. According to mainnet data, Walrus has triggered over 31.5 million blob events, including a vast number of registration and certification records—indicating that many users and projects are actively performing real storage writes and validations on the network. Each blob event corresponds to a transaction on the Sui chain, directly enhancing on-chain activity depth.

Compared to other decentralized storage protocols, Walrus's on-chain event mechanism has two key advantages: first, it allows developers to monitor storage status in real-time, which many protocols cannot do because they do not write metadata back to the chain; second, smart contracts can automatically trigger subsequent logic based on these events—such as initiating NFT mappings or calling indexing services when a BlobCertified event occurs.

This not only verifies the integrity of storage but also creates a "life sign" for data on the chain. For developers, data events can directly link to application logic, greatly expanding possibilities. If the number of these events continues to grow, it will serve as the most intuitive proof of the real usage growth of the Walrus network.