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Release Notes for [**release-2025-05-15\_03-20-base**](https://github.com/dfinity/ic/tree/release-2025-05-15_03-20-base) (59ad18a77fbeaf3ebbba863972ff20f7ab588d7a)
===================================================================================================================================================================

This release is based on changes since [release-2025-05-08\_03-21-base](https://dashboard.internetcomputer.org/release/2f52f298de53944209f550774505aa72a1a3ed17) (2f52f298de53944209f550774505aa72a1a3ed17).

Please note that some commits may be excluded from this release if they're not relevant, or not modifying the GuestOS image. Additionally, descriptions of some changes might have been slightly modified to fit the release notes format.

To see a full list of commits added since last release, compare the revisions on [GitHub](https://github.com/dfinity/ic/compare/release-2025-05-08_03-21-base...release-2025-05-15_03-20-base).

Features:
---------

* [`12ade0592`](https://github.com/dfinity/ic/commit/12ade0592) Interface: Allow zero pre\_signatures\_to\_create\_in\_advance in vetKD ChainKeyConfig ([#5014](https://github.com/dfinity/ic/pull/5014))
* [`a7a57d574`](https://github.com/dfinity/ic/commit/a7a57d574) Node(IDX): Add prefix to artifact bundles ([#5098](https://github.com/dfinity/ic/pull/5098))

Bugfixes:
---------

* [`b7e15a5d8`](https://github.com/dfinity/ic/commit/b7e15a5d8) Execution,Interface: make upload\_chunk idempotent ([#5049](https://github.com/dfinity/ic/pull/5049))
* [`80d9fc533`](https://github.com/dfinity/ic/commit/80d9fc533) Execution,Interface: clear canister logs before instantiating new canister during reinstall ([#5064](https://github.com/dfinity/ic/pull/5064))

Performance improvements:
-------------------------

* [`6b72db3f9`](https://github.com/dfinity/ic/commit/6b72db3f9) Consensus,Interface(idkg): Performance improvement when building a transcript of a certain ID ([#4999](https://github.com/dfinity/ic/pull/4999))

Chores:
-------

* [`53ac5a6a1`](https://github.com/dfinity/ic/commit/53ac5a6a1) Consensus,Interface: add more logs to nns delegation manager ([#5050](https://github.com/dfinity/ic/pull/5050))
* [`204e1bda4`](https://github.com/dfinity/ic/commit/204e1bda4) Consensus,Interface,Node: renaming mentions of ch1-obsdev1 into testnet ([#5085](https://github.com/dfinity/ic/pull/5085))
* [`97a0e6132`](https://github.com/dfinity/ic/commit/97a0e6132) Crypto: Modify VetKD key derivation ([#5088](https://github.com/dfinity/ic/pull/5088))
* [`7a72da08c`](https://github.com/dfinity/ic/commit/7a72da08c) Crypto: Use a fixed length domain separator for IBE message mask ([#5028](https://github.com/dfinity/ic/pull/5028))
* [`230b080ae`](https://github.com/dfinity/ic/commit/230b080ae) Execution,Interface: refine ErrorHelp::ToolchainError ([#5122](https://github.com/dfinity/ic/pull/5122))
* [`f8d49eb9c`](https://github.com/dfinity/ic/commit/f8d49eb9c) Execution,Interface: Add error doc link for canister snapshot limit error. ([#5078](https://github.com/dfinity/ic/pull/5078))
* [`e309dc2af`](https://github.com/dfinity/ic/commit/e309dc2af) Execution,Interface: Add error doc for CanisterManagerError::ReservedCyclesLimitIsTooLow ([#5074](https://github.com/dfinity/ic/pull/5074))
* [`d1dc4c2dc`](https://github.com/dfinity/ic/commit/d1dc4c2dc) Interface: Update Rust to 1.86.0 ([#5059](https://github.com/dfinity/ic/pull/5059))
* [`f68a58fab`](https://github.com/dfinity/ic/commit/f68a58fab) Interface: update Rust to 1.85.1 ([#4340](https://github.com/dfinity/ic/pull/4340))
* [`182119f38`](https://github.com/dfinity/ic/commit/182119f38) Interface,Message Routing: Don't deliver ALREADY\_EXISTS checkpoint in state sync ([#5121](https://github.com/dfinity/ic/pull/5121))
* [`7443f1e1c`](https://github.com/dfinity/ic/commit/7443f1e1c) Owners(IDX): rules\_rust: 0.56.0 -> 0.61.0 ([#4574](https://github.com/dfinity/ic/pull/4574))
* [`dabab3d1c`](https://github.com/dfinity/ic/commit/dabab3d1c) Node: Update boot args key to extra\_boot\_args\_template ([#5073](https://github.com/dfinity/ic/pull/5073))
* [`7269994c8`](https://github.com/dfinity/ic/commit/7269994c8) Node(IDX): move ic-os upload to BUILD.bazel ([#5070](https://github.com/dfinity/ic/pull/5070))
* [`f5749622f`](https://github.com/dfinity/ic/commit/f5749622f) Node(IDX): extract file size checks from icos\_build ([#5054](https://github.com/dfinity/ic/pull/5054))
* [`ebd587595`](https://github.com/dfinity/ic/commit/ebd587595) Node(IDX): rename checksum\_rule to artifact\_bundle ([#5002](https://github.com/dfinity/ic/pull/5002))
* [`f25b30020`](https://github.com/dfinity/ic/commit/f25b30020) Node: Update Base Image Refs [2025-05-08-0807] ([#5033](https://github.com/dfinity/ic/pull/5033))

Tests:
------

* [`492fdcea6`](https://github.com/dfinity/ic/commit/492fdcea6) Consensus,Interface(replay): Unit test for Player::get\_changes\_since in rs/replay. ([#5022](https://github.com/dfinity/ic/pull/5022))
* [`59ad18a77`](https://github.com/dfinity/ic/commit/59ad18a77) Interface(nervous\_system/canister): Test getting large Registry mutations from a canister. ([#5043](https://github.com/dfinity/ic/pull/5043))
* [`4b0953166`](https://github.com/dfinity/ic/commit/4b0953166) Interface: Extend some unit tests with vet keys ([#5010](https://github.com/dfinity/ic/pull/5010))

-------------------------------------------
Full list of changes (including the ones that are not relevant to GuestOS) can be found on [GitHub](https://github.com/dfinity/dre/blob/f5f9693ab064e2404083ff8991e6da4bd880379d/replica-releases/59ad18a77fbeaf3ebbba863972ff20f7ab588d7a.md).

# IC-OS Verification

To build and verify the IC-OS GuestOS disk image, after installing curl if necessary (`sudo apt install curl`), run:

```
# From https://github.com/dfinity/ic#verifying-releases
curl -fsSL https://raw.githubusercontent.com/dfinity/ic/master/ci/tools/repro-check | python3 - -c 59ad18a77fbeaf3ebbba863972ff20f7ab588d7a --guestos
```

The two SHA256 sums printed above from a) the downloaded CDN image and b) the locally built image, must be identical, and must match the SHA256 from the payload of the NNS proposal.

While not required for this NNS proposal, as we are only electing a new GuestOS version here, you have the option to verify the build reproducibility of the HostOS by passing `--hostos` to the script above instead of `--guestos`, or the SetupOS by passing `--setupos`.


Elect new IC/GuestOS revision (commit 59ad18a)