Changelog
Changelog
Updates to BaseHub and notable Base network and protocol changes, newest first.
This feed is also available as raw Markdown at /changelog.md
and JSON at /changelog.json.
2026
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Native account abstraction lands in Cobalt, not Beryl
Upstream reassigned EIP-8130 from a later Beryl phase to a later Cobalt phase and repointed its spec link. The Beryl overview now says so; the September 2026 Cobalt timing is unchanged.
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audit-archiver now expires transaction events in Postgres
A background worker prunes rows by event type: 3 days for proxy and builder-decision events, 7 for ingress and forwarding, 30 for failures, drops, inclusion, and flashblock. Postgres is working storage, not the archive.
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Added Standalone Proving guide
How to run the three-container prover stack against a live network without a devnet: ZK backend choices, the four historical RPC endpoints, funding a Succinct requester key, and the basectl propose/finalize/submit flow.
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Base Mainnet operators must move to reth V2 storage by mid-August
V1 snapshots are being retired over the coming weeks. Pull a fresh V2 snapshot with base-reth-node download, or convert existing data in place with base-reth-node db migrate-v2 (archival nodes only, and much slower).
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Added B20 Precompile Reference
Selector-level reference for all five B20 interfaces: functions with four-byte selectors, events by topic0, reverts by selector, plus the shared role, policy, and variant constants.
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B20 spec now documents seizeWithMemo
The standard's seize path moved off the deprecated burnBlocked. Added a Seize section covering SEIZE_ROLE and the inverted SEIZE_HOLDER_POLICY check, and corrected the roles, policy scope, and pause tables.
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Onchain Nitro attestation validation works again after Fusaka
Fusaka's MODEXP repricing and 16.7M gas cap broke base/nitro-validator. Checked P-384 inverse hints supplied in calldata bring a full cold attestation back to five transactions, each well under the cap.
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New Block Production Review guide
Covers the halt and stall scenarios reviewers must check on base/base pull requests touching builder, execution, precompile, payload, or flashblocks paths, plus the I/O boundary size gate.
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Security Council upgrade path is a 2-of-2 multisig
Base contract upgrades need both the CB Signers (a 3-of-6 Coinbase multisig, counted as one signature) and the Security Council (8-of-11). That is 9 approvals across 12 participants, and neither side can proceed alone.
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basectl pointer added to sync troubleshooting
The stuck-sync entry now points at the basectl operator CLI, which reports richer node state and diagnostics than reading optimism_syncStatus directly.
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New Testing guide for base/base
Documents the four testing tiers — unit, action, system, and fuzz — plus the static checks and the CI stages that run each one, from pull request through merge queue and nightly.
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P2P spec: transaction forwarding moved to its own crate
The reader/forwarder pipeline now lives in tx-forwarding rather than txpool, with DestinationReader and DestinationForwarder replacing the old spawned consumer and forwarder types.
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Development workflow recipes corrected
Static checks are now namespaced as check::<name>, and check::all no longer runs the test suite. Added the just pr recipe, which scopes tests to the crates a branch affects.
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Snapshot FAQ: Full vs Minimal, and migrating a pruned v1 node
Dropped the stale 31-day retention claim for the Full snapshot and pointed to Reth's storage docs instead. Added guidance for operators moving a pruned v1-storage node onto v2.
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Vibenet faucet and explorer move to chain.base.org
Base's Vibenet preview network now serves its landing page, faucet, and block explorer under chain.base.org/vibenet. The RPC endpoint at rpc.vibes.base.org is unchanged.
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Mainnet safe head delayed on July 28
Base Mainnet's safe head lagged for about two hours on July 28. Unsafe block production was unaffected; only the batching of L2 data to Ethereum L1 was delayed. Resolved at 15:13 UTC.
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Transaction event journal gains segment rotation
The transaction-event/v1 journal config adds max_file_bytes and max_files, capping the size of the active JSONL segment and the number of segments retained on disk.
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Added Native Account Abstraction
New architecture page.
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Native Account Abstraction announced (EIP-8130)
Base, with Optimism, Coinbase, and WalletConnect, is moving account abstraction into the protocol via EIP-8130, cutting a USDC transfer from 125,000 to 46,000 gas and adding native batching, sponsorship, and session keys. Ships in the Cobalt upgrade in September 2026.
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Added Bridging and Withdrawals
New network page.
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Added June 2026 Block Production Outage
New architecture page.
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Added Throughput and Limits
New network page.
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Postmortem: June 25 block production outage
Two mainnet block-production halts on June 25 and 26 traced to a sequencer bug that left the EVM journal state dirty, mischarging gas on a following transaction. Patched in base/base PR #3806.
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Added Transaction Event Journal
New specification page.
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Base Beryl upgrade reaches mainnet June 25
Beryl, Base's second network upgrade, adds the B20 native token standard, shortens the withdrawal delay, and raises throughput with Reth V2.
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Added Jovian L2 Execution Engine
New specification page.
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Added B20 Native Token Standard
New specification page.
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Added Beryl Upgrade Overview
New specification page.
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Added Reth V2
New specification page.
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Added Glossary
New specification page.
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Added Azul Execution Engine
New specification page.
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Added Isthmus L2 Execution Engine
New specification page.
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Added Protocol Overview
New architecture page.
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Added Configuration
New specification page.
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Added Rollup node RPC
New API reference page.
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Added Azul Node Upgrade Guide
New node operations page.
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Added Azul Proof System
New specification page.
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Added Proof Contracts
New specification page.
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Added TEE Prover
New specification page.
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Added ZK Prover
New specification page.
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Added Challenger
New specification page.
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Added Network Incident History
New network page.
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Added Proof System Overview
New specification page.
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Added Proposer
New specification page.
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Added Engineering Blog Index
New architecture page.
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Added Multiproofs on Base
New architecture page.
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Multiproofs live on Base mainnet
Base shipped its multiproof system pairing TEE and ZK provers, the technical bar for Stage 2 decentralization, also speeding withdrawals by removing the optimistic challenge window.
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Added Azul Upgrade Overview
New specification page.
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Added TEE Prover Registrar
New specification page.
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Launched BaseHub
Initial public release — 177 documentation pages mirroring Base as agent-readable Markdown, with every page reachable by appending .md to its URL.