Integrate EigenDA: Decentralized Data Availability for Rollups

Rollup projects face a dilemma: storing all data on Ethereum is expensive, while off-chain DA solutions require trust. EigenDA solves this with mathematical proofs of availability and economic guarantees from EigenLayer. Compared to Ethereum blobs, EigenDA delivers 10x higher throughput (10+ MB/s) at a fraction of the cost. Fee savings can reach 90%—on one of our projects, the savings exceeded tens of thousands of dollars per month at 5 MB/s throughput.

Our team has completed 10+ successful DA layer integrations for rollups on Ethereum, Arbitrum, and OP Stack. EigenDA uses EigenLayer restaking for security.

How EigenDA Solves Data Availability

EigenDA uses erasure coding and Data Availability Sampling (DAS). Data of size D is encoded into M chunks (M > D) using a Reed-Solomon code. Any D out of M chunks are sufficient to reconstruct the original. Even if 50% of operators are unavailable, the data is still recoverable.

Data Availability Sampling (DAS) allows a light client to verify data availability by downloading only a small random subset of chunks. If 30 random chunks are downloaded and all are available, there is a >99.9% probability that all data is available (assuming 50% erasure coding).

Blob (rollup data) ↓
Reed-Solomon encoding
Chunks [c0, c1, c2, ..., cn] ↓
KZG polynomial commitments
Commitment (short proof of data) ↓
Dispersal to operators
Operators store chunks + answer sampling requests

EigenDA Architecture

EigenDA consists of three components:

• Operators — node owners who have restaked ETH via EigenLayer and provide storage and bandwidth. Over 100 operators are already in the network.
• Disperser — a service (currently centralized by EigenLabs, with a roadmap to decentralize) that accepts data from the rollup, splits it into chunks via erasure coding, distributes to operators, and collects signatures.
• On-chain Verifier — a smart contract on Ethereum that verifies that a quorum of operators signed an attestation of data receipt.

Comparison with Alternatives

How to Perform EigenDA Integration

1. Architecture analysis — Determine the integration type: ready-made proxy (OP Stack) or custom.
2. Infrastructure deployment — Set up EigenDA Disperser, contracts, and connect to EigenLayer. Test on Holesky.
3. Dispersal integration — Implement sending data via EigenDA API with fallback to Ethereum calldata. Implement on-chain verification.
4. Load testing — Verify throughput, latency, and fault tolerance. Use Tenderly for simulation.
5. Audit and deploy — Audit contracts (Slither, Mythril) and migrate configuration to mainnet. Set up monitoring.

Example Dispersal and Verification Code

The rollup sequencer sends data via the EigenDA Disperser API:

func disperseBlob(data []byte) (*disperser.BlobInfo, error) {
	conn, err := grpc.Dial("disperser-holesky.eigenda.xyz:443", grpc.WithTransportCredentials(...))
	if err != nil {
		return nil, err
	}
	defer conn.Close()
	client := disperser.NewDisperserClient(conn)
	reply, err := client.DisperseBlob(context.Background(), &disperser.DisperseBlobRequest{
		Data: data,
		CustomQuorumNumbers: []uint32{},
		AccountId: accountId,
	})
	if err != nil {
		return nil, err
	}
	for {
		statusReply, _ := client.GetBlobStatus(context.Background(), &disperser.BlobStatusRequest{
			RequestId: reply.RequestId,
		})
		if statusReply.Status == disperser.BlobStatus_CONFIRMED {
			return statusReply.Info, nil
		}
		time.Sleep(2 * time.Second)
	}
}

func postBatchWithFallback(batchData []byte) error {
	blobInfo, err := disperseToEigenDA(batchData)
	if err == nil {
		return postToEthereumWithEigenDARef(blobInfo)
	}
	log.Warn("EigenDA dispersal failed, falling back to calldata", "err", err)
	return postToEthereumCalldata(batchData)
}

After confirmation, the serialized BlobInfo is posted to Ethereum in calldata.

On-chain Verification

interface IEigenDAServiceManager {
    function confirmBatch(
        BatchHeader calldata batchHeader,
        OperatorStakesAndSignature calldata operatorStakesAndSignature
    ) external;

    function verifyBlob(
        BlobHeader calldata blobHeader,
        BlobVerificationProof calldata blobVerificationProof
    ) external view;
}

contract RollupWithEigenDA {
    IEigenDAServiceManager public eigenDA;

    function submitBatch(
        bytes calldata batchData,
        BlobHeader calldata eigenDABlobHeader,
        BlobVerificationProof calldata eigenDAProof
    ) external {
        eigenDA.verifyBlob(eigenDABlobHeader, eigenDAProof);
        bytes32 batchRoot = keccak256(batchData);
        _submitBatchRoot(batchRoot);
    }
}

Integration with OP Stack via EigenDA Proxy

For rollups based on OP Stack, there is a ready-made EigenDA Proxy—a sidecar service implementing the OP Stack alt-DA interface:

eigenda-proxy:
  image: ghcr.io/layr-labs/eigenda-proxy:latest
  environment:
    - EIGENDA_PROXY_ADDR=0.0.0.0
    - EIGENDA_PROXY_PORT=4242
    - EIGENDA_PROXY_EIGENDA_DISPERSER_RPC=disperser-holesky.eigenda.xyz:443
    - EIGENDA_PROXY_G1_PATH=/data/g1.point
    - EIGENDA_PROXY_G2_POWER_OF_TAU_PATH=/data/g2.point.powerOf2
  volumes:
    - ./data:/data

The OP Stack batch poster is configured with --altda.da-service=true and points to the proxy. Everything else is transparent.

What's Included in the Integration

Timelines and Cost

• Proxy integration (OP Stack): 2 to 3 weeks for setup, testing, and testnet launch.
• Custom integration: 4 to 8 weeks, including auditing.
• Custom DA layer development on EigenDA: 3 to 4 months.

Cost is calculated individually. Get an engineer consultation—we’ll evaluate your project for free. Contact our specialists for a detailed discussion.

Our team has completed 10+ DA layer integrations, uses industrial tools (Foundry, Slither, Tenderly), and guarantees correct configuration with ongoing support. Request a consultation on EigenDA integration.