Release Notes for [**release-2025-04-03\_03-15-base**](https://github.com/dfinity/ic/tree/release-2025-04-03_03-15-base) (68fc31a141b25f842f078c600168d8211339f422)
===================================================================================================================================================================

This release is based on changes since [release-2025-03-27\_03-14-base](https://dashboard.internetcomputer.org/release/3ae3649a2366aaca83404b692fc58e4c6e604a25) (3ae3649a2366aaca83404b692fc58e4c6e604a25).

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-2025-03-27_03-14-base...release-2025-04-03_03-15-base).

Features:
---------

* [`7f009d854`](https://github.com/dfinity/ic/commit/7f009d854) Execution,Interface: Read canister snapshot metadata ([#4514](https://github.com/dfinity/ic/pull/4514))
* [`77dfd0cc3`](https://github.com/dfinity/ic/commit/77dfd0cc3) Execution,Interface: Add canister snapshot metadata fields to types ([#4431](https://github.com/dfinity/ic/pull/4431))
* [`2c64388af`](https://github.com/dfinity/ic/commit/2c64388af) Execution,Interface: Introduce low bound for canister's freezing threshold ([#4401](https://github.com/dfinity/ic/pull/4401))
* [`810dddeb8`](https://github.com/dfinity/ic/commit/810dddeb8) Node: Build with hermetic cc toolchains ([#3508](https://github.com/dfinity/ic/pull/3508))

Bugfixes:
---------

* [`8936943a6`](https://github.com/dfinity/ic/commit/8936943a6) Consensus,Interface: increment divergence\_responses stat for each divergent response ([#4559](https://github.com/dfinity/ic/pull/4559))
* [`1bb75e45a`](https://github.com/dfinity/ic/commit/1bb75e45a) Execution,Interface: Use default value for SnapshotSource instead of failing. ([#4596](https://github.com/dfinity/ic/pull/4596))
* [`c766779a7`](https://github.com/dfinity/ic/commit/c766779a7) Execution,Interface: Improve documentation and error message of wasm chunk store ([#4589](https://github.com/dfinity/ic/pull/4589))

Chores:
-------

* [`4fab827a3`](https://github.com/dfinity/ic/commit/4fab827a3) Execution,Interface: log composite and expensive canister http transforms ([#4623](https://github.com/dfinity/ic/pull/4623))
* [`0a0e235f3`](https://github.com/dfinity/ic/commit/0a0e235f3) Execution,Interface: Safer ellipsize ([#4549](https://github.com/dfinity/ic/pull/4549))
* [`3d73f0af2`](https://github.com/dfinity/ic/commit/3d73f0af2) Execution,Interface: Remove wasm\_native\_stable\_memory feature flag ([#4524](https://github.com/dfinity/ic/pull/4524))
* [`a2f4c702c`](https://github.com/dfinity/ic/commit/a2f4c702c) Execution,Interface: Remove legacy inter-canister query calls ([#592](https://github.com/dfinity/ic/pull/592))
* [`6f3739270`](https://github.com/dfinity/ic/commit/6f3739270) Interface,Message Routing: Change new canister snapshot fields to be optional ([#4632](https://github.com/dfinity/ic/pull/4632))
* [`9ac3bfbcf`](https://github.com/dfinity/ic/commit/9ac3bfbcf) Interface,Message Routing: Log if manifest computation is incremental ([#4581](https://github.com/dfinity/ic/pull/4581))
* [`b5f63841a`](https://github.com/dfinity/ic/commit/b5f63841a) Interface,Message Routing: Clarify state sync logs ([#4542](https://github.com/dfinity/ic/pull/4542))
* [`3b9db1908`](https://github.com/dfinity/ic/commit/3b9db1908) Node: Remove execmem permissions (Redo) ([#4539](https://github.com/dfinity/ic/pull/4539))
* [`8a97b5580`](https://github.com/dfinity/ic/commit/8a97b5580) Node: Update Base Image Refs [2025-03-27-0808] ([#4546](https://github.com/dfinity/ic/pull/4546))

Refactoring:
------------

* [`f366b62d0`](https://github.com/dfinity/ic/commit/f366b62d0) Consensus,Interface(consensus): Create an IDKG crate ([#4526](https://github.com/dfinity/ic/pull/4526))
* [`9662ae275`](https://github.com/dfinity/ic/commit/9662ae275) Execution,Interface: Move system\_api inside embedders crate ([#4591](https://github.com/dfinity/ic/pull/4591))
* [`2de3fbec2`](https://github.com/dfinity/ic/commit/2de3fbec2) Execution,Interface: Rename embedders/system\_api.rs to embedders/linker.rs ([#4611](https://github.com/dfinity/ic/pull/4611))
* [`722fb4ad0`](https://github.com/dfinity/ic/commit/722fb4ad0) Interface,Message Routing: Use generics and impl trait instead of dyn trait ([#4527](https://github.com/dfinity/ic/pull/4527))

Other changes:
--------------

* [`6fc00b797`](https://github.com/dfinity/ic/commit/6fc00b797) Node: "feat: Build with hermetic cc toolchains ([#3508](https://github.com/dfinity/ic/pull/3508))" ([#4621](https://github.com/dfinity/ic/pull/4621))

-------------------------------------------
Full list of changes (including the ones that are not relevant to GuestOS) can be found on [GitHub](https://github.com/dfinity/dre/blob/e2ff6563663a468d8fee217b7b0e4607448a79c1/replica-releases/68fc31a141b25f842f078c600168d8211339f422.md).

# IC-OS Verification

To build and verify the IC-OS 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 68fc31a141b25f842f078c600168d8211339f422 --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`.
