Summary

This release is required for users and operators to upgrade.

We are excited to release EigenDA v0.9.0, code name "Blazar" (aka. EigenDA V2), a major protocol and architecture upgrade for the entire system.

Key Features and Enhancements

• Control Plane & Data Plane Separation

  Separates the flow of blob data from its metadata/control as they move through disperser, encoders and validators. This improves end-to-end data movement efficiency and boosts validator node performance and robustness by increasing network utilization through concurrent download connections.

• Payments Support

  EigenDA now supports on-demand payments and reservations, enabling applications to access the network permissionlessly with flexible payment options.

• Faster and Cheaper Dispersal with DA Certificate

  Reduces end-to-end dispersal latency and cost by eliminating on-chain confirmation and returning a DA certificate representing DA nodes' attestations.

• New Chunk Allocation Model

  Introduces a fixed-chunk model, making encoding a stateless operation and reducing system complexity.

• Revamped Blob State Management

  Enhances robustness by enforcing immutable records and introducing constraints into the data model.

• Improved Blob Addressing

  Introduces Blobkey, a universally unique string identifier for each blob, replacing the previous composite key (batch header hash + blob index). This simplifies interactions and improves UX when working with blobs.

Further Details

• Executive Summary
• Payments Summary
• Validator Migration Guide

What's Changed

Changes between the previous release candidate and the current release candidate.

Breaking Changes

• Type accountID as Address instead of string by @ian-shim in #1335
• Reservation period index by @hopeyen in #1350
• Fix how relay/validators compute hashes by @cody-littley in #1351
• Adds domain to hashing functions by @cody-littley in #1358
• Replay protection by @cody-littley in #1365
• Fix: ondemand scheme by @hopeyen in #1386
• [Breaking Changes] Add signature replay protection for AuthenticatePaymentStateRequest by @yujiezhu0 in #1411

Performance Improvements

• Disable seek compaction by @dmanc in #1342
• Improve perf of blob retrieval within bucket by @jianoaix in #1329
• Make feed cache update async by @jianoaix in #1363
• Feed cache: Use circular queue for zero-alloc of memory by @jianoaix in #1384

Features

• Support both backward and forward iteration at blob store by @jianoaix in #1306
• Support backward iteration for blob feed by @jianoaix in #1314
• Implement relay url provider by @litt3 in #1328
• Introduce feed cache by @jianoaix in #1355
• Implement cert verifier address provider by @litt3 in #1368
• Operator batch feed support at blobstore by @jianoaix in #1378
• Support two-way traversal in batch feed API by @jianoaix in #1366
• feat(contracts): v0.1.0 release by @ethenotethan in #1387
• Add API for per-operator batch feed by @jianoaix in #1392
• add trailing option to read g2 file by @bxue-l2 in #1401

Fixes

• Recover state at controller initialization by @ian-shim in #1312
• fix: addOnDemandPayment after validatePayment by @hopeyen in #1320
• fix: strict exclusive end timestamp by @hopeyen in #1321
• fix: addition for bigInt by @hopeyen in #1322
• Do not panic if the wrong number of chunks are returned by @cody-littley in #1325
• fix: Use Protobuf Getters in Hasher by @ian-shim in #1339
• Check chunk length before deserialization by @ian-shim in #1340
• Reset dispatcher cursor when all encoded blobs are enumerated by @ian-shim in #1352
• Make sure no operator can reply to same batch multiple times by @ian-shim in #1356
• Calculate Charge at the payment by @yujiezhu0 in #1346
• Make sure each relay GetChunks request is either by index or by range by @ian-shim in #1338
• feat: check blob key exist before payments by @hopeyen in #1370
• Check multiplication overflow in ValidateEncodingParams by @ian-shim in #1341
• fix: log the file path upon error in nodeplugin by @jianoaix in #1379
• fix: use consistent query params across pages by @jianoaix in #1375
• Fix per-operator api's missing operator_id param by @jianoaix in #1410
• Protect against accidental nil dereference in EncodeBlob() by @cody-littley in #1404
• Don't block forever in EncodeBlob() if the context is cancelled by @cody-littley in #1405
• Fix eda2-22 by @cody-littley in #1406
• Properly round up blob size to next power of 2 when checking length by @cody-littley in #1407
• Fix deadlock in the encoder by @cody-littley in #1418
• Remove failed blobs from blobset in dispatcher by @ian-shim in #1402
• enable sync writes for levelDB by @cody-littley in #1413

Misc

• CertVerifier updates by @0x0aa0 in #1207
• Query cert verifier for required quorums by @litt3 in #1301
• Update codeql-scanning.yaml by @anupsv in #1279
• Allow bytes from relay to be of 0 length by @litt3 in #1295
• Update contract addresses, and fix disabled tests by @litt3 in #1310
• docs: refactor docs/spec to use mdbook by @samlaf in #1161
• Add environment variable to hold eth RPC urls by @cody-littley in #1311
• Implement required quorums cache by @litt3 in #1317
• Use payload and blob structs by @litt3 in #1305
• Various small tweaks to the load generator by @cody-littley in #1316
• Add additional edge case correctness tests by @litt3 in #1318
• Enable pprof for traffic generator by @cody-littley in #1319
• Disable client tests against holesky by @ian-shim in #1330
• Cache verifier callers by @litt3 in #1331
• Fix flaky encoded payload test by @litt3 in #1333
• refactor: use block number for all payment vault param calls by @hopeyen in #1323
• avoid unnecessary casting by @hopeyen in #1327
• test: make reservation test less flaky (due to time) by @hopeyen in #1243
• Simplify payload disperser config and construction by @litt3 in #1343
• Simplify blazar client config and construction by @litt3 in #1345
• Update codeql-scanning.yaml by @anupsv in #1315
• Enable correctness tests on testnet by @cody-littley in #1353
• chore: move autogenerated api protobuf mdfiles to mdbook by @samlaf in #1348
• chore: address general comments by @hopeyen in #1324
• Add leveldb metrics by @dmanc in #1313
• docs(proto-v1): add explanation as to how the request_id is computed by @samlaf in #1360
• docs(mdbook): add v2 integration spec to mdbook by @samlaf in #1354
• ci(docker-publish): fix workflow by updating cache action v2->v4 by @samlaf in #1362
• Integrate feed cache with batch feed and operators signinginfo by @jianoaix in #1364
• CI: disable test-contracts binding diff by @jianoaix in #1376
• CertVerifier Deployer by @0x0aa0 in #1302
• refactor: better check for existing payments by @hopeyen in #1377
• assignment tests by @hopeyen in #1385
• docs: Add core client readme by @litt3 in #1388
• Reenable client tests on holesky by @ian-shim in #1369
• refactor: use metadata store to check for blob existence by @hopeyen in #1380
• docs(mdbook): add basic documentation for rollup stacks by @samlaf in #1383
• docs: add documentation for disperser v2 grpc api and related functions/structs by @samlaf in #1104
• Add getter for relay registry address by @litt3 in #1393
• CI: upgrade test-contracts ubuntu to 24.04 by @jianoaix in #1399
• Add metrics to feed cache by @jianoaix in #1394
• Verifiable Contract Deployment Script by @pakim249CAL in #1396
• refactor: dispersal client 1 request at a time by @hopeyen in #1389
• chore: update eigenlayer-middleware commit by @hopeyen in #1416
• ci: Add job to check if PR title is using conventional commits by @dmanc in #1419
• chore: Update dependabot.yml for dockerfiles by @anupsv in #1297
• chore: updating subgraphs deps by @anupsv in #1412
• Refactor the data APIs by @jianoaix in #1417

New Contributors

• @pakim249CAL made their first contribution in #1396

Full Changelog: v0.9.0-rc.0...v0.9.0-rc.1