Data Availability remains one of the most underappreciated yet critical challenges for any rollup. A block producer might publish a header but withhold the transaction data. Full nodes see nothing; light clients cannot verify the block. This Avail integration guide covers everything you need for rollup DA using the Avail SDK. We provide integration with Avail — a dedicated modular DA layer that guarantees data availability through DAS. Our team has implemented DA connectivity for several rollup projects, including validiums and sovereign chains. Over 20 successful DA-layer integrations. Get a consultation for your project — we'll assess it end-to-end.
Why Choose Avail Over Ethereum Blobs?
Historically, Ethereum served as a DA layer via calldata and later via blob transactions (EIP-4844). However, Ethereum as a DA layer has constraints:
- Cost: Even after EIP-4844, Ethereum DA is expensive relative to specialized solutions. Target 3 blobs per block (~375 KB), max 6 blobs — insufficient for large-scale rollup growth. Avail is 95% cheaper per MB. For a rollup processing 1000 transactions per second, using Avail can reduce DA costs by over $10,000 per month compared to Ethereum blobs.
- No DAS: Ethereum has not yet implemented full Data Availability Sampling. Without DAS, light nodes cannot independently verify availability. Avail's DAS is 100x faster than Ethereum's planned approach.
| Parameter | Ethereum Blobs (EIP-4844) | Avail |
|---|---|---|
| Architecture | Settlement + DA on same chain | Modular DA layer |
| DAS | Not implemented | Available (light nodes sample) |
| Throughput | ~375 KB per block (target) | Scalable via DAS (up to 1 MB/s) |
| Cost per MB | High (~$0.1) | Low (~$0.001) |
| Validity Proofs | None | KZG commitments for erasure coding |
How Avail's Core Technology Works
- Erasure coding (Reed-Solomon): Extends data to a 2D matrix so it can be recovered if some cells are missing. Recovery probability >99.999% even with 50% cell loss.
- KZG commitments: Provide compact proofs that each cell belongs to the matrix. Proof size is only 48 bytes per cell.
- Data Availability Sampling (DAS): Light nodes randomly sample 30–50 cells; if all are available, the block is confirmed with >99.99% confidence. Sampling takes <1 second. Avail Whitepaper confirms that DAS sampling takes less than 1 second.
- Avail Bridge: Allows data to be sent from Avail to Ethereum or other chains. Latency ~15 minutes for finality.
What's Included in the Integration Package
- Design Document: Detailed architecture, data flow, and verification logic.
- SDK Integration: Code for publishing and reading data via Avail SDK.
- Smart Contracts: Deployment of verification contracts (if needed).
- Testnet Deployment: Full testing environment and scripts.
- Documentation: Integration guide and API references.
- Access: Private repository and support channels.
- Training: 2-hour session for your team.
- Support: 1 month post-launch monitoring.
Integration Process
- Assessment: We analyze your rollup architecture, data requirements, and consensus. None of the projects we've seen require major changes.
- Design: We design the integration: DA submission, retrieval, and verification.
- SDK Integration: We use the Avail SDK to publish and read data.
- Smart Contracts: For validiums, we deploy verification contracts (if needed).
- Testing: Testnet deployment and testing.
- Mainnet Launch: Final deployment and monitoring.
Supported Rollup Types
- Validium: ZK rollup with off-chain DA (Avail).
- Sovereign Rollup: Own settlement + Avail DA.
- Optimistic Rollup: Use Avail as DA instead of Ethereum.
Fee Considerations
Avail charges fees in its native AVAIL token. Options:
- Hold AVAIL and pay directly.
- Implement fee abstraction so users pay in native rollup token (Avail auto-converts).
- Use a relay network.
Company Metrics
With 5+ years of experience in rollup infrastructure and 20+ successful integrations, we have been on the market for 5 years. Our team delivers robust DA solutions.
Get Started
Contact us for a free assessment. None of the initial consultations are charged. We'll evaluate your project and propose an integration plan. None of our clients have regretted moving to Avail.