chore(v4): release 4.0.1

[AztecBot]

Pending Aztec Packages v4 release

4.0.1 (2026-02-26)

� BREAKING CHANGES

• Bump l2 gas per note hash (#20862)
• update vks
• update da gas (#20611)
• change max private log size to 16 fields (#20515)
• pairing points audit (#20456)
• include_by_timestamp -> expiration_timestamp (#20536)

Features

• (A-302) add reloadKeystore admin RPC endpoint (#20325) (639368d)
• (A-451) error codes for RPC calls (#20560) (639368d)
• (A-514) add API key authentication for admin RPC endpoint (#20411) (639368d)
• add aztec profile command with gate count profiling (#20695) (83ea202)
• add API key authentication for admin RPC endpoint (ff4cf99)
• add aztec profile flamegraph command (#20741) (83ea202)
• add support for signed integers on contract functions (#20784) (fdd0d0d)
• adding mempool transactions (#20679) (43caf7c)
• alpha payload (#20865) (7a09c3c)
• archiver: add l2 tips cache (#20510) (639368d)
• archiver: return L2 block data to avoid fetching full block (#20503) (639368d)
• automatically stop node from signalling (#20416) (639368d)
• avoid redundant serial zeroing in polynomial allocation (#20670) (bb844d4)
• call syncImmediate without block number during chain prune (#20717) (43caf7c)
• check calldata against emitted hashes (#20486) (43caf7c)
• ci.aztec-labs.com: CI cost and metrics tracking (#20100) (639368d)
• disabling peer scoring for block proposals topic (#20577) (6414d9b)
• dynamically adjust missing txs set (#20300) (dedf440)
• Error codes for RPC calls (43ed6a9)
• expose blockheader getters (#20790) (fdd0d0d)
• Metrics added to the transaction pool (#20477) (639368d)
• notify slack on merge train PR merge (#20614) (dbbeddc)
• p2p: add download metrics to file store tx source (#20601) (639368d)
• printing out public contract function debug logs in a tx (#20749) (83ea202)
• Re-instate the function optionally to delete all transactions in an epoch prune (#20602) (dedf440)
• reduced hashing (#20676) (bf3191c)
• run low priority eviction rule on chain_pruned (#20687) (43caf7c)
• suspend sentinel during escape hatch (#20471) (639368d)
• tcmalloc enabled in docker images (#20644) (b87c8ae)
• trim attestations to the minimum required length (#20591) (43caf7c)
• use native crypto to compute p2p message ID (#20846) (fdd0d0d)
• Validate num txs in block proposals (#20850) (f3f5438)
• worker thread wallet (#20557) (639368d)
• World state history length is now defined in checkpoints (#20566) (639368d)

Bug Fixes

• (A-575) prevent checkpoint event spam in L2BlockStream on restart (#20791) (fdd0d0d)
• DelayedPublicMutable not relying on the guarantee of increasing timestamps (#20244) (a178034)
• allow compiling mixed (contract + noir script) aztec project (#20428) (83ea202)
• archiver: enforce checkpoint boundary on rollbackTo (#20908) (f3f5438)
• async blob (#20559) (639368d)
• async dispose() lint rule (#20587) (639368d)
• async world state cleanups (#20578) (639368d)
• attribute for L1 fee analysis for full blocks (#20548) (63131de)
• avm: alu gadget fuzzer serialisation (#19115) (50e778a)
• aztec-up: install noir-profiler alongside nargo (#20896) (f3f5438)
• charge 3.6M for epoch verification (#20765) (fdd0d0d)
• ci: insufficient parallelism in merge-queue-heavy (#20613) (5bfbd67)
• ci: preserve both attempt logs when retrying flaky tests (#20439) (639368d)
• default pp handling (#20516) (f9431cd)
• do not ignore test artifacts (#20574) (402f438)
• docs examples lockfile (#20453) (4bf9ddd)
• escape hatch snapshots (#20363) (e4712cd)
• ethereum: check timeout before consuming nonce in L1TxUtils (#20501) (639368d)
• ethereum: remove viem NonceManager to fix nonce gap after failed sends (#20819) (fdd0d0d)
• evicted transactions could reappear after a node restart (#20773) (fdd0d0d)
• Fix checkpoint invalidation test (#20579) (639368d)
• Fix the epoch long proving test (#20617) (6414d9b)
• flag stripping error (#20655) (b87c8ae)
• getVotes return empty instead of stale data (#20756) (fdd0d0d)
• hodgepodge of small things (#20720) (43caf7c)
• increase waitForTx timeout in epochs_invalidate_block test (#20603) (639368d)
• limit number of threads when verifying server-side proofs (#20818) (fdd0d0d)
• min expiration timestamp instead of assert (#20554) (fa29717)
• misc minor contract fixes (#20423) (3a13674)
• node: sync ws before simulating public calls (#20499) (639368d)
• p2p: fix compress option in file store and enable for tx uploads (#20605) (639368d)
• p2p: wait for GossipSub mesh formation before sending txs in e2e tests (#20626) (fdd0d0d)
• pass log level to AVM simulator (#20762) (fdd0d0d)
• pxe native prover log level (#20724) (fdd0d0d)
• Reduce tx hash conversions inside tx pool (#20829) (fdd0d0d)
• respecting MAX_RPC_LEN limit in getAllLogsByTags (#20543) (c2475bd)
• separate rejected and aborted proving jobs (#20777) (fdd0d0d)
• Set Aztec slot duration as a multiple of the Ethereum slot duration (#20608) (dedf440)
• set PXE sync chain tip to proposed for scenario bot (#20530) (639368d)
• skip default pp in sol aggregation (#20521) (f9431cd)
• stringify all bigints in pino-logger (#20303) (639368d)
• sync world state before forking in simulatePublicCalls (#20544) (f3420e0)
• track last seen nonce in case of stale fallback L1 RPC node (#20855) (83ea202)
• txe: committing after txs (#20714) (83ea202)
• underflow in snapshot synch (#20780) (fdd0d0d)
• Use async poseidon (#20826) (fdd0d0d)
• use ci3_labels_to_env.sh for ci-external label (#20597) (3efb1d9)
• write pointers for environ_get and environ_sizes_get functions (#20902) (f3f5438)
• yolo debugging tweaks (0a9d6e0)
• yolo some fd cleanup, maybe stop hangs (43d292c)

Miscellaneous

• include_by_timestamp -> expiration_timestamp (#20536) (44a33a1)
• update vks (4d653dd)

Documentation

• document RevertCodeEnum phases and add 120-char line width rule (#20751) (83ea202)
• fix avm docs - l2 gas is not the same as mana (#20565) (50e778a)
• minor clarification (#20788) (fdd0d0d)
• simulator readme typos (#19701) (50e778a)
• some tail circuit doc comments (#20449) (fd509a3)
  This PR was generated with Release Please. See documentation.

[AztecBot]

🤖 Created releases:

• v4.0.1

🌻