@Walrus 🦭/acc is a decentralized storage network for big files, built to make data availability verifiable instead of assumed. I’m describing it as two layers working together because Sui coordinates payments, metadata, and an onchain proof that a blob was accepted, while Walrus nodes store the encoded data off-chain. A file is erasure-coded into many fragments and distributed across operators, so reconstruction can succeed even when some nodes are offline.
Proof of Availability is the turning point where they’re committed in public, which helps apps depend on a clear custody boundary. Storage is purchased for epochs and can be extended, so long-lived data is possible without pretending time is free.
WAL is used for storage fees and staking incentives, but the user still must encrypt before uploading if confidentiality matters. The purpose is simple: reduce reliance on a single provider and let applications reference large data with stronger integrity and availability guarantees. If you build with data that must not vanish, understanding Walrus helps you spot where responsibility shifts, what it costs, and what can fail before your users feel betrayed.