Fabric release v3.1.2 (#5310)

Update release notes for v3.1.2

Signed-off-by: Yacov Manevich <yacov.manevich@gmail.com>

Author: yacovm

Makefile

@@ -46,7 +46,7 @@
 #   - verify - runs unit tests for only the changed package tree
 
 UBUNTU_VER ?= 24.04
-FABRIC_VER ?= 3.1.1
+FABRIC_VER ?= 3.1.2
 
 # 3rd party image version
 # These versions are also set in the runners in ./integration/runners/

docs/source/whatsnew.rst

@@ -101,6 +101,7 @@ Additionally, take a look at the announcements about changes and deprecations th
 * `Fabric v3.0.0 release notes <https://github.com/hyperledger/fabric/releases/tag/v3.0.0>`_.
 * `Fabric v3.1.0 release notes <https://github.com/hyperledger/fabric/releases/tag/v3.1.0>`_.
 * `Fabric v3.1.1 release notes <https://github.com/hyperledger/fabric/releases/tag/v3.1.1>`_.
+* `Fabric v3.1.2 release notes <https://github.com/hyperledger/fabric/releases/tag/v3.1.2>`_.
 
 .. Licensed under Creative Commons Attribution 4.0 International License
    https://creativecommons.org/licenses/by/4.0/

release_notes/v3.1.2.md

@@ -0,0 +1,41 @@
+v3.1.2 Release Notes - October 13, 2025
+=====================================
+
+
+Improvements and Fixes
+----------------------
+
+1. Config update can now be submitted through the channel participation API via a PUT that sends the config update as a multipart/form-data to /participation/v1/channels. The osnadmin tool has been updated accordingly, both contributions from @pfi79.
+2. The channel participation API can now be used to fetch blocks, courtesy of @pfi79.
+3. BFT orderers can now have their enrollment certificates rotated without requiring a config update as long as the public keys remain the same.  Feature contributed by @dviejokfs.
+4. TLS Timeshift has been added to the channel participation API, implemented by @pfi79.
+
+Dependencies
+------------
+Fabric v3.1.2 has been tested with the following dependencies:
+* Go 1.25.2
+* CouchDB v3.4.2
+
+Fabric docker images on docker.io and ghcr.io utilize Ubuntu 24.04.
+
+
+Changes and Removals
+--------------------
+
+See the [v3.0.0 release notes](https://github.com/hyperledger/fabric/releases/tag/v3.0.0) for changes and removals between Fabric v2.x and Fabric v3.x.
+
+
+Deprecated features
+-------------------
+
+**Block dissemination via gossip is deprecated and may be removed**
+
+Block dissemination via gossip is deprecated and may be removed in a future release.
+Fabric peers can be configured to receive blocks directly from an ordering service
+node, and not gossip blocks, by using the following configuration:
+```
+peer.gossip.orgLeader: true
+peer.gossip.useLeaderElection: false
+peer.gossip.state.enabled: false
+peer.deliveryclient.blockGossipEnabled: false
+```