From 4e3dd136b85a595e95c9a42a1cfd61e596ac8392 Mon Sep 17 00:00:00 2001
From: junbyjun1238 <251473466+junbyjun1238@users.noreply.github.com>
Date: Thu, 14 May 2026 00:30:10 +0900
Subject: [PATCH 1/8] doc: mention -DWITH_ZMQ=ON in BSD build guides

The FreeBSD, NetBSD, and OpenBSD build guides state that ZMQ support is compiled in when the package is installed. Since WITH_ZMQ defaults to OFF, update the wording to mention the required CMake option.

Github-Pull: #35283
Rebased-From: ca93ab808c488324990eb91ed8297a37dd10d580
---
 doc/build-freebsd.md | 2 +-
 doc/build-netbsd.md  | 2 +-
 doc/build-openbsd.md | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/build-freebsd.md b/doc/build-freebsd.md
index 549d189e7d1..63318840119 100644
--- a/doc/build-freebsd.md
+++ b/doc/build-freebsd.md
@@ -86,7 +86,7 @@ Otherwise, if you don't need QR encoding support, use the `-DWITH_QRENCODE=OFF`
 #### Notifications
 ###### ZeroMQ
 
-Bitcoin Core can provide notifications via ZeroMQ. If the package is installed, support will be compiled in.
+Bitcoin Core can provide notifications via ZeroMQ. To compile ZMQ support, install the following dependency and pass `-DWITH_ZMQ=ON` when configuring.
 ```bash
 pkg install libzmq4
 ```
diff --git a/doc/build-netbsd.md b/doc/build-netbsd.md
index 05b80eb7476..5b01d7b912c 100644
--- a/doc/build-netbsd.md
+++ b/doc/build-netbsd.md
@@ -86,7 +86,7 @@ Otherwise, if you don't need QR encoding support, use the `-DWITH_QRENCODE=OFF`
 #### Notifications
 ###### ZeroMQ
 
-Bitcoin Core can provide notifications via ZeroMQ. If the package is installed, support will be compiled in.
+Bitcoin Core can provide notifications via ZeroMQ. To compile ZMQ support, install the following dependency and pass `-DWITH_ZMQ=ON` when configuring.
 ```bash
 pkgin zeromq
 ```
diff --git a/doc/build-openbsd.md b/doc/build-openbsd.md
index 7ab51054ad2..e2a15f67c86 100644
--- a/doc/build-openbsd.md
+++ b/doc/build-openbsd.md
@@ -80,7 +80,7 @@ Otherwise, if you don't need QR encoding support, use the `-DWITH_QRENCODE=OFF`
 #### Notifications
 ###### ZeroMQ
 
-Bitcoin Core can provide notifications via ZeroMQ. If the package is installed, support will be compiled in.
+Bitcoin Core can provide notifications via ZeroMQ. To compile ZMQ support, install the following dependency and pass `-DWITH_ZMQ=ON` when configuring.
 ```bash
 pkg_add zeromq
 ```

From 005738e3b846d1ba33f8d4a24f93c238fcf52f88 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C5=91rinc?= <pap.lorinc@gmail.com>
Date: Wed, 6 May 2026 14:27:13 +0200
Subject: [PATCH 2/8] wallet: use outpoint when estimating input size

`CalculateMaximumSignedInputSize()` is passed the outpoint being sized, but that context was not used when estimating the signed input size.
Pass the outpoint through so externally selected inputs are not underestimated.

Co-authored-by: Antoine Poinsot <darosior@protonmail.com>

Github-Pull: #35228
Rebased-From: cd8d3bd937b5515ea000408eb07d2ae3cd1aa417
---
 src/wallet/spend.cpp            |  2 +-
 src/wallet/test/spend_tests.cpp | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/wallet/spend.cpp b/src/wallet/spend.cpp
index f45db1c16f3..26924d63526 100644
--- a/src/wallet/spend.cpp
+++ b/src/wallet/spend.cpp
@@ -92,7 +92,7 @@ int CalculateMaximumSignedInputSize(const CTxOut& txout, const COutPoint outpoin
     if (!provider) return -1;
 
     if (const auto desc = InferDescriptor(txout.scriptPubKey, *provider)) {
-        if (const auto weight = MaxInputWeight(*desc, {}, coin_control, true, can_grind_r)) {
+        if (const auto weight = MaxInputWeight(*desc, CTxIn{outpoint}, coin_control, true, can_grind_r)) {
             return static_cast<int>(GetVirtualTransactionSize(*weight, 0, 0));
         }
     }
diff --git a/src/wallet/test/spend_tests.cpp b/src/wallet/test/spend_tests.cpp
index 963c0f838b1..ac76fe4dda0 100644
--- a/src/wallet/test/spend_tests.cpp
+++ b/src/wallet/test/spend_tests.cpp
@@ -3,6 +3,7 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <consensus/amount.h>
+#include <key.h>
 #include <policy/fees.h>
 #include <script/solver.h>
 #include <validation.h>
@@ -16,6 +17,22 @@
 namespace wallet {
 BOOST_FIXTURE_TEST_SUITE(spend_tests, WalletTestingSetup)
 
+BOOST_AUTO_TEST_CASE(max_signed_input_size_uses_external_outpoint)
+{
+    const CKey key{GenerateRandomKey()};
+    FillableSigningProvider provider;
+    BOOST_REQUIRE(provider.AddKey(key));
+
+    const CTxOut txout{COIN, GetScriptForDestination(PKHash{key.GetPubKey()})};
+    const COutPoint outpoint{Txid{}, 0};
+    CCoinControl coin_control;
+    coin_control.Select(outpoint).SetTxOut(txout);
+
+    const int low_r{CalculateMaximumSignedInputSize(txout, COutPoint{}, &provider, /*can_grind_r=*/true, &coin_control)};
+    const int high_r{CalculateMaximumSignedInputSize(txout, outpoint, &provider, /*can_grind_r=*/true, &coin_control)};
+    BOOST_CHECK_EQUAL(high_r, low_r + 1);
+}
+
 BOOST_FIXTURE_TEST_CASE(SubtractFee, TestChain100Setup)
 {
     CreateAndProcessBlock({}, GetScriptForRawPubKey(coinbaseKey.GetPubKey()));

From e5613db1133ba8e155798bd88ae4a48c2628b73b Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Wed, 6 May 2026 16:04:54 +0200
Subject: [PATCH 3/8] depends: Unset `SOURCE_DATE_EPOCH` in `gen_id` script

Github-Pull: #34228
Rebased-From: 9f7a2293c48f8afb5e87765a327a0c89fd21fa56
---
 depends/gen_id | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/depends/gen_id b/depends/gen_id
index fe6d163547a..ab5b6fb58c6 100755
--- a/depends/gen_id
+++ b/depends/gen_id
@@ -28,6 +28,10 @@
     # Redirect stderr to stdout
     exec 2>&1
 
+    # Unset SOURCE_DATE_EPOCH to prevent it from leaking into tool
+    # outputs and to maximize reuse of the built package cache.
+    unset SOURCE_DATE_EPOCH
+
     echo "BEGIN ALL"
 
     # Include any ID salts supplied via command line

From b631f2724630aa3559cc4d5065777640845c0130 Mon Sep 17 00:00:00 2001
From: Andrew Toth <andrewstoth@gmail.com>
Date: Tue, 19 May 2026 11:38:51 -0400
Subject: [PATCH 4/8] Disable seek compaction

Seek compaction is causing a cascade effect in the chainstate DB, causing large parts of the database to be rewritten every ~hour.

Every periodic flush writes around 2 MiB. Since this is roughly the `write_buffer_size`, these writes regularly cause the memtable to rotate into a small L0 file. This file has a small seek budget, and with the random UTXO reads done during validation, it can get scheduled for seek compaction quickly.

That seek compaction pushes the small file down to L1. Since most UTXOs are already lower down in L4/L5, many reads that consult this file do not find the key there and continue downward. The bloom filter makes those misses cheap, but LevelDB still decrements the file's seek budget. The file then gets scheduled for another seek compaction, and the same pattern pushes it down through L2 and L3.

The expensive part happens around L3/L4. L4 has many ~32 MiB files holding the bulk of the UTXO set. When LevelDB compacts into L3, it may split the output into many smaller L3 files to limit how much L4 "grandparent" data any one output overlaps. Each of these small L3 files then gets its own small seek budget. Because chainstate keys are hash-random, each small L3 file can still have a broad key range, so many random reads consult it and quickly drain its budget. Once seek-compacted into L4, each tiny L3 file can overlap many L4 files, so compacting a few hundred KiB from L3 can require rewriting hundreds of MiB from L4. Repeating that across many small L3 files can rewrite most of the chainstate.

This is a poor fit for chainstate because UTXO keys are hash-random, the DB is large enough to have many levels, writes are relatively small and periodic, and reads are frequent. The result is that read misses trigger compactions much earlier than size pressure would, and those compactions have very high write amplification.

Disabling seek compaction may leave more files in upper levels for longer, so reads could theoretically consult more files. But Bitcoin Core enables bloom filters for all its LevelDB instances, so these misses are usually cheap in-memory filter checks rather than disk reads.

For the other DBs, the risk is much smaller. They also use bloom filters, and most are smaller and less read-heavy. With fewer levels and less random read pressure, disabling seek compaction should have little effect there.

Co-authored-by: l0rinc <pap.lorinc@gmail.com>

Github-Pull: #35313
Rebased-From: 6bfdb6093bba4710d0f8313ed0113967a8b5176f
---
 src/leveldb/db/autocompact_test.cc | 18 ++++++++----------
 src/leveldb/db/db_test.cc          | 16 +++++++++-------
 src/leveldb/db/version_set.cc      | 17 +++++++----------
 3 files changed, 24 insertions(+), 27 deletions(-)

diff --git a/src/leveldb/db/autocompact_test.cc b/src/leveldb/db/autocompact_test.cc
index e6c97a05a6b..f6e714c6524 100644
--- a/src/leveldb/db/autocompact_test.cc
+++ b/src/leveldb/db/autocompact_test.cc
@@ -54,8 +54,8 @@ static const int kValueSize = 200 * 1024;
 static const int kTotalSize = 100 * 1024 * 1024;
 static const int kCount = kTotalSize / kValueSize;
 
-// Read through the first n keys repeatedly and check that they get
-// compacted (verified by checking the size of the key space).
+// Read through the first n keys repeatedly and check that reads do NOT
+// trigger compaction (seek compaction is disabled in this fork).
 void AutoCompactTest::DoReads(int n) {
   std::string value(kValueSize, 'x');
   DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
@@ -76,25 +76,23 @@ void AutoCompactTest::DoReads(int n) {
   const int64_t initial_size = Size(Key(0), Key(n));
   const int64_t initial_other_size = Size(Key(n), Key(kCount));
 
-  // Read until size drops significantly.
+  // Read repeatedly. The size of the read range must NOT shrink: with
+  // seek compaction disabled, reads never schedule a compaction.
   std::string limit_key = Key(n);
-  for (int read = 0; true; read++) {
-    ASSERT_LT(read, 100) << "Taking too long to compact";
+  for (int read = 0; read < 100; read++) {
     Iterator* iter = db_->NewIterator(ReadOptions());
     for (iter->SeekToFirst();
          iter->Valid() && iter->key().ToString() < limit_key; iter->Next()) {
       // Drop data
     }
     delete iter;
-    // Wait a little bit to allow any triggered compactions to complete.
-    Env::Default()->SleepForMicroseconds(1000000);
     uint64_t size = Size(Key(0), Key(n));
     fprintf(stderr, "iter %3d => %7.3f MB [other %7.3f MB]\n", read + 1,
             size / 1048576.0, Size(Key(n), Key(kCount)) / 1048576.0);
-    if (size <= initial_size / 10) {
-      break;
-    }
   }
+  // Give any background work a chance to run, even though none should.
+  Env::Default()->SleepForMicroseconds(1000000);
+  ASSERT_EQ(Size(Key(0), Key(n)), static_cast<uint64_t>(initial_size));
 
   // Verify that the size of the key space not touched by the reads
   // is pretty much unchanged.
diff --git a/src/leveldb/db/db_test.cc b/src/leveldb/db/db_test.cc
index beb1d3bdef6..81fb9e94ebf 100644
--- a/src/leveldb/db/db_test.cc
+++ b/src/leveldb/db/db_test.cc
@@ -735,15 +735,14 @@ TEST(DBTest, GetPicksCorrectFile) {
   } while (ChangeOptions());
 }
 
-TEST(DBTest, GetEncountersEmptyLevel) {
+TEST(DBTest, GetDoesNotTriggerSeekCompaction) {
   do {
     // Arrange for the following to happen:
     //   * sstable A in level 0
     //   * nothing in level 1
     //   * sstable B in level 2
-    // Then do enough Get() calls to arrange for an automatic compaction
-    // of sstable A.  A bug would cause the compaction to be marked as
-    // occurring at level 1 (instead of the correct level 0).
+    // Seek compaction is disabled in this fork, so repeated reads must
+    // not change the level layout. A manual compaction must still work.
 
     // Step 1: First place sstables in levels 0 and 2
     int compaction_count = 0;
@@ -761,14 +760,17 @@ TEST(DBTest, GetEncountersEmptyLevel) {
     ASSERT_EQ(NumTableFilesAtLevel(1), 0);
     ASSERT_EQ(NumTableFilesAtLevel(2), 1);
 
-    // Step 3: read a bunch of times
+    // Step 3: many read misses must not schedule any compaction.
     for (int i = 0; i < 1000; i++) {
       ASSERT_EQ("NOT_FOUND", Get("missing"));
     }
-
-    // Step 4: Wait for compaction to finish
     DelayMilliseconds(1000);
+    ASSERT_EQ(NumTableFilesAtLevel(0), 1);
+    ASSERT_EQ(NumTableFilesAtLevel(1), 0);
+    ASSERT_EQ(NumTableFilesAtLevel(2), 1);
 
+    // Step 4: a manual compaction still moves the L0 file down.
+    dbfull()->TEST_CompactRange(0, nullptr, nullptr);
     ASSERT_EQ(NumTableFilesAtLevel(0), 0);
   } while (ChangeOptions());
 }
diff --git a/src/leveldb/db/version_set.cc b/src/leveldb/db/version_set.cc
index cd07346ea8a..8dc73295b84 100644
--- a/src/leveldb/db/version_set.cc
+++ b/src/leveldb/db/version_set.cc
@@ -400,16 +400,11 @@ Status Version::Get(const ReadOptions& options, const LookupKey& k,
   return state.found ? state.s : Status::NotFound(Slice());
 }
 
-bool Version::UpdateStats(const GetStats& stats) {
-  FileMetaData* f = stats.seek_file;
-  if (f != nullptr) {
-    f->allowed_seeks--;
-    if (f->allowed_seeks <= 0 && file_to_compact_ == nullptr) {
-      file_to_compact_ = f;
-      file_to_compact_level_ = stats.seek_file_level;
-      return true;
-    }
-  }
+bool Version::UpdateStats(const GetStats& /*stats*/) {
+  // Disable automatic compactions triggered by read seek counters.
+  // The heuristic was tuned for expensive random seeks and can create
+  // severe write amplification on large random-key databases.
+  // Size and manual compactions still run.
   return false;
 }
 
@@ -661,6 +656,8 @@ class VersionSet::Builder {
       // same as the compaction of 40KB of data.  We are a little
       // conservative and allow approximately one seek for every 16KB
       // of data before triggering a compaction.
+      //
+      // Note: seek compactions are disabled. See Version::UpdateStats.
       f->allowed_seeks = static_cast<int>((f->file_size / 16384U));
       if (f->allowed_seeks < 100) f->allowed_seeks = 100;
 

From 1907ee01fee7824ef6a3bde670f70cadab76c0ac Mon Sep 17 00:00:00 2001
From: will <will@256k1.dev>
Date: Mon, 11 May 2026 10:06:55 +0100
Subject: [PATCH 5/8] ci: switch runners from cirrus to warpbuild

Github-Pull: #35378
Rebased-From: 4bdd46ace37f02da062a53a2943caeddca4ed8f9
---
 .github/actions/configure-docker/action.yml |  9 +---
 .github/workflows/ci.yml                    | 48 ++++++++++-----------
 ci/README.md                                | 10 ++---
 3 files changed, 30 insertions(+), 37 deletions(-)

diff --git a/.github/actions/configure-docker/action.yml b/.github/actions/configure-docker/action.yml
index 9bf970ee78f..af667f0fdb5 100644
--- a/.github/actions/configure-docker/action.yml
+++ b/.github/actions/configure-docker/action.yml
@@ -1,7 +1,7 @@
 name: 'Configure Docker'
 description: 'Set up Docker build driver and configure build cache args'
 inputs:
-  use-cirrus:
+  use-warp:
     description: 'Use cirrus cache'
     required: true
 runs:
@@ -35,12 +35,7 @@ runs:
         # Docker will check for variables $ACTIONS_CACHE_URL, $ACTIONS_RESULTS_URL and $ACTIONS_RUNTIME_TOKEN
         # which are set automatically when running on GitHub infra: https://docs.docker.com/build/cache/backends/gha/#synopsis
 
-        # Use cirrus cache host
-        if [[ ${{ inputs.use-cirrus }} == 'true' ]]; then
-          url_args="url=${CIRRUS_CACHE_HOST},url_v2=${CIRRUS_CACHE_HOST}"
-        else
-          url_args=""
-        fi
+        url_args=""
 
         # Always optimistically --cache‑from in case a cache blob exists
         args=(--cache-from "type=gha${url_args:+,${url_args}},scope=${CONTAINER_NAME}")
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b0af3eb95fe..e2d7cffa182 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,29 +19,29 @@ concurrency:
 
 env:
   CI_FAILFAST_TEST_LEAVE_DANGLING: 1  # GHA does not care about dangling processes and setting this variable avoids killing the CI script itself on error
-  CIRRUS_CACHE_HOST: http://127.0.0.1:12321/ # When using Cirrus Runners this host can be used by the docker `gha` build cache type.
-  REPO_USE_CIRRUS_RUNNERS: 'bitcoin/bitcoin' # Use cirrus runners and cache for this repo, instead of falling back to the slow GHA runners
+  REPO_USE_WARP_RUNNERS: 'bitcoin/bitcoin' # Use warp runners for this repo, instead of falling back to the slow GHA runners
 
 jobs:
   runners:
     name: 'determine runners'
     runs-on: ubuntu-latest
     outputs:
-      use-cirrus-runners: ${{ steps.runners.outputs.use-cirrus-runners }}
+      use-warp-runners: ${{ steps.runners.outputs.use-warp-runners }}
     steps:
       - id: runners
         run: |
-          if [[ "${REPO_USE_CIRRUS_RUNNERS}" == "${{ github.repository }}" ]]; then
-            echo "use-cirrus-runners=true" >> "$GITHUB_OUTPUT"
-            echo "::notice title=Runner Selection::Using Cirrus Runners"
+          if [[ "${REPO_USE_WARP_RUNNERS}" == "${{ github.repository }}" ]]; then
+            echo "provider=warp" >> "$GITHUB_OUTPUT"
+            echo "::notice title=Runner Selection::Using Warp Runners"
           else
-            echo "use-cirrus-runners=false" >> "$GITHUB_OUTPUT"
+            echo "use-warp-runners=false" >> "$GITHUB_OUTPUT"
             echo "::notice title=Runner Selection::Using GitHub-hosted runners"
           fi
 
   test-each-commit:
     name: 'test each commit'
-    runs-on: ubuntu-24.04
+    needs: runners
+    runs-on: ${{ needs.runners.outputs.provider == 'warp' && 'warp-ubuntu-latest-x64-8x' || 'ubuntu-24.04' }}
     if: github.event_name == 'pull_request' && github.event.pull_request.commits != 1
     timeout-minutes: 360  # Use maximum time, see https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#jobsjob_idtimeout-minutes. Assuming a worst case time of 1 hour per commit, this leads to a --max-count=6 below.
     env:
@@ -292,7 +292,7 @@ jobs:
   ci-matrix:
     name: ${{ matrix.name }}
     needs: runners
-    runs-on: ${{ needs.runners.outputs.use-cirrus-runners == 'true' && matrix.cirrus-runner || matrix.fallback-runner }}
+    runs-on: ${{ needs.runners.outputs.provider == 'warp' && matrix.warp-runner || matrix.fallback-runner }}
     if: ${{ vars.SKIP_BRANCH_PUSH != 'true' || github.event_name == 'pull_request' }}
     timeout-minutes: ${{ matrix.timeout-minutes }}
 
@@ -305,73 +305,73 @@ jobs:
       matrix:
         include:
           - name: '32 bit ARM, unit tests, no functional tests'
-            cirrus-runner: 'ubuntu-24.04-arm' # Cirrus' Arm runners are Apple (with virtual Linux aarch64), which doesn't support 32-bit mode
+            warp-runner: 'ubuntu-24.04-arm' # Warp's Arm runners don't support 32-bit mode currently
             fallback-runner: 'ubuntu-24.04-arm'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_arm.sh'
 
           - name: 'win64 Cross'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-sm'
+            warp-runner: 'warp-ubuntu-latest-x64-4x'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_win64.sh'
 
           - name: 'ASan + LSan + UBSan + integer, no depends, USDT'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-md' # has to match container in ci/test/00_setup_env_native_asan.sh for tracing tools
+            warp-runner: 'warp-ubuntu-2404-x64-8x' # has to match container in ci/test/00_setup_env_native_asan.sh for tracing tools
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_asan.sh'
 
           - name: 'macOS-cross, gui, no tests'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-sm'
+            warp-runner: 'warp-ubuntu-latest-x64-4x'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_mac_cross.sh'
 
           - name: 'No wallet, libbitcoinkernel'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-sm'
+            warp-runner: 'warp-ubuntu-latest-x64-4x'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_nowallet_libbitcoinkernel.sh'
 
           - name: 'i686, multiprocess, DEBUG'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-md'
+            warp-runner: 'warp-ubuntu-latest-x64-8x'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_i686_multiprocess.sh'
 
           - name: 'fuzzer,address,undefined,integer, no depends'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-lg'
+            warp-runner: 'warp-ubuntu-latest-x64-16x'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 240
             file-env: './ci/test/00_setup_env_native_fuzz.sh'
 
           - name: 'previous releases, depends DEBUG'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-md'
+            warp-runner: 'warp-ubuntu-latest-x64-8x'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_previous_releases.sh'
 
           - name: 'CentOS, depends, gui'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-lg'
+            warp-runner: 'warp-ubuntu-latest-x64-16x'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_centos.sh'
 
           - name: 'tidy'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-md'
+            warp-runner: 'warp-ubuntu-latest-x64-8x'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_tidy.sh'
 
           - name: 'TSan, depends, no gui'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-md'
+            warp-runner: 'warp-ubuntu-latest-x64-8x'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_tsan.sh'
 
           - name: 'MSan, depends'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-lg'
+            warp-runner: 'warp-ubuntu-latest-x64-16x'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_msan.sh'
@@ -389,7 +389,7 @@ jobs:
       - name: Configure Docker
         uses: ./.github/actions/configure-docker
         with:
-          use-cirrus: ${{ needs.runners.outputs.use-cirrus-runners }}
+          use-warp: ${{ needs.runners.outputs.use-warp-runners }}
 
       - name: Enable bpfcc script
         if: ${{ env.CONTAINER_NAME == 'ci_native_asan' }}
@@ -411,7 +411,7 @@ jobs:
   lint:
     name: 'lint'
     needs: runners
-    runs-on: ${{ needs.runners.outputs.use-cirrus-runners == 'true' && 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-xs' || 'ubuntu-24.04' }}
+    runs-on: ${{ needs.runners.outputs.provider == 'warp' && 'warp-ubuntu-latest-x64-2x' || 'ubuntu-24.04' }}
     if: ${{ vars.SKIP_BRANCH_PUSH != 'true' || github.event_name == 'pull_request' }}
     timeout-minutes: 20
     env:
@@ -426,7 +426,7 @@ jobs:
       - name: Configure Docker
         uses: ./.github/actions/configure-docker
         with:
-          use-cirrus: ${{ needs.runners.outputs.use-cirrus-runners }}
+          use-warp: ${{ needs.runners.outputs.use-warp-runners }}
 
       - name: CI script
         run: |
diff --git a/ci/README.md b/ci/README.md
index 81e048ce687..a73c8df5e75 100644
--- a/ci/README.md
+++ b/ci/README.md
@@ -61,13 +61,11 @@ trigger cache-invalidation and rebuilds as necessary.
 
 To configure the primary repository, follow these steps:
 
-1. Register with [Cirrus Runners](https://cirrus-runners.app/) and purchase runners.
-2. Install the Cirrus Runners GitHub app against the GitHub organization.
+1. Register with [WarpBuild](https://www.warpbuild.com/) and purchase runners.
+2. Install the WarpBuild GitHub app against the GitHub organization.
 3. Enable organisation-level runners to be used in public repositories:
    1. `Org settings -> Actions -> Runner Groups -> Default -> Allow public repos`
 4. Permit the following actions to run:
-   1. cirruslabs/cache/restore@\*
-   1. cirruslabs/cache/save@\*
    1. docker/setup-buildx-action@\*
    1. actions/github-script@\*
 
@@ -76,5 +74,5 @@ To configure the primary repository, follow these steps:
 When used in a fork the CI will run on GitHub's free hosted runners by default.
 In this case, due to GitHub's 10GB-per-repo cache size limitations caches will be frequently evicted and missed, but the workflows will run (slowly).
 
-It is also possible to use your own Cirrus Runners in your own fork with an appropriate patch to the `REPO_USE_CIRRUS_RUNNERS` variable in ../.github/workflows/ci.yml
-NB that Cirrus Runners only work at an organisation level, therefore in order to use your own Cirrus Runners, *the fork must be within your own organisation*.
+It is also possible to use your own WarpBuild Runners in your own fork with an appropriate patch to the `REPO_USE_WARP_RUNNERS` variable in ../.github/workflows/ci.yml
+NB that WarpBuild Runners only work at an organisation level, therefore in order to use your own WarpBuild Runners, *the fork must be within your own organisation*.

From 33dd5e74d8689b7a55e5aedfdf31dca9770557ec Mon Sep 17 00:00:00 2001
From: fanquake <fanquake@gmail.com>
Date: Fri, 29 May 2026 08:59:43 +0100
Subject: [PATCH 6/8] doc: remove reference to cirrus

Github-Pull: #35408
Rebased-From: 265563bf75c0b8b615e28d47398098020ff0b109
---
 .editorconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.editorconfig b/.editorconfig
index c5f3028c503..d7fe7ad5e24 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -13,7 +13,7 @@ trim_trailing_whitespace = true
 [*.{h,cpp,rs,py,sh}]
 indent_size = 4
 
-# .cirrus.yml, etc.
+# ci.yml, etc.
 [*.yml]
 indent_size = 2
 

From 9d62f5d0be07f156a857e53a2ce4f83e0294f809 Mon Sep 17 00:00:00 2001
From: fanquake <fanquake@gmail.com>
Date: Fri, 29 May 2026 09:03:07 +0100
Subject: [PATCH 7/8] ci: use ubuntu-latest instead of ubuntu-24.04

To match the usage of -latest for the warp runners.

Github-Pull: #35408
Rebased-From: 5700a61b73342b506b0114b342499da7642c1c10
---
 .github/workflows/ci.yml | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e2d7cffa182..2a683970614 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,7 +41,7 @@ jobs:
   test-each-commit:
     name: 'test each commit'
     needs: runners
-    runs-on: ${{ needs.runners.outputs.provider == 'warp' && 'warp-ubuntu-latest-x64-8x' || 'ubuntu-24.04' }}
+    runs-on: ${{ needs.runners.outputs.provider == 'warp' && 'warp-ubuntu-latest-x64-8x' || 'ubuntu-latest' }}
     if: github.event_name == 'pull_request' && github.event.pull_request.commits != 1
     timeout-minutes: 360  # Use maximum time, see https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#jobsjob_idtimeout-minutes. Assuming a worst case time of 1 hour per commit, this leads to a --max-count=6 below.
     env:
@@ -312,67 +312,67 @@ jobs:
 
           - name: 'win64 Cross'
             warp-runner: 'warp-ubuntu-latest-x64-4x'
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_win64.sh'
 
           - name: 'ASan + LSan + UBSan + integer, no depends, USDT'
             warp-runner: 'warp-ubuntu-2404-x64-8x' # has to match container in ci/test/00_setup_env_native_asan.sh for tracing tools
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_asan.sh'
 
           - name: 'macOS-cross, gui, no tests'
             warp-runner: 'warp-ubuntu-latest-x64-4x'
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_mac_cross.sh'
 
           - name: 'No wallet, libbitcoinkernel'
             warp-runner: 'warp-ubuntu-latest-x64-4x'
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_nowallet_libbitcoinkernel.sh'
 
           - name: 'i686, multiprocess, DEBUG'
             warp-runner: 'warp-ubuntu-latest-x64-8x'
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_i686_multiprocess.sh'
 
           - name: 'fuzzer,address,undefined,integer, no depends'
             warp-runner: 'warp-ubuntu-latest-x64-16x'
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 240
             file-env: './ci/test/00_setup_env_native_fuzz.sh'
 
           - name: 'previous releases, depends DEBUG'
             warp-runner: 'warp-ubuntu-latest-x64-8x'
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_previous_releases.sh'
 
           - name: 'CentOS, depends, gui'
             warp-runner: 'warp-ubuntu-latest-x64-16x'
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_centos.sh'
 
           - name: 'tidy'
             warp-runner: 'warp-ubuntu-latest-x64-8x'
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_tidy.sh'
 
           - name: 'TSan, depends, no gui'
             warp-runner: 'warp-ubuntu-latest-x64-8x'
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_tsan.sh'
 
           - name: 'MSan, depends'
             warp-runner: 'warp-ubuntu-latest-x64-16x'
-            fallback-runner: 'ubuntu-24.04'
+            fallback-runner: 'ubuntu-latest'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_msan.sh'
 
@@ -411,7 +411,7 @@ jobs:
   lint:
     name: 'lint'
     needs: runners
-    runs-on: ${{ needs.runners.outputs.provider == 'warp' && 'warp-ubuntu-latest-x64-2x' || 'ubuntu-24.04' }}
+    runs-on: ${{ needs.runners.outputs.provider == 'warp' && 'warp-ubuntu-latest-x64-2x' || 'ubuntu-latest' }}
     if: ${{ vars.SKIP_BRANCH_PUSH != 'true' || github.event_name == 'pull_request' }}
     timeout-minutes: 20
     env:

From d8da418220f4d4bdbb7c7691b78a093716266c2c Mon Sep 17 00:00:00 2001
From: fanquake <fanquake@gmail.com>
Date: Thu, 7 May 2026 11:45:49 +0200
Subject: [PATCH 8/8] doc: update release notes for v29.x

---
 doc/release-notes.md | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/doc/release-notes.md b/doc/release-notes.md
index c69faf32572..bd6db525f5d 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -37,12 +37,25 @@ unsupported systems.
 Notable changes
 ===============
 
+### Validation
+
+- #35209 validation: correct lifetime of precomputed tx data
+
+### Leveldb
+
+- #61(bitcoin-core/leveldb): Disable seek compaction
+
 ### Net
 
 - #34093 netif: fix compilation warning in QueryDefaultGatewayImpl()
 
+### Wallet
+
+- #35228 wallet: use outpoint when estimating input size
+
 ### Build
 
+- #34228 depends: Unset SOURCE_DATE_EPOCH in gen_id script
 - #34848 cmake: Migrate away from deprecated SQLite3 target
 
 ### Doc
@@ -50,10 +63,13 @@ Notable changes
 - #34510 doc: fix broken bpftrace installation link
 - #34561 wallet: rpc: manpage: fix example missing `fee_rate` argument
 - #34671 doc: Update Guix install for Debian/Ubuntu
+- #35283 doc: mention -DWITH_ZMQ=ON in BSD build guides
 
 ### CI
 
 - #35202 ci: restore sockets in i686, no IPC job
+- #35378 ci: switch runners from cirrus to warpbuild
+- #35408 ci: 35378 followups
 
 ### Misc
 
@@ -64,14 +80,19 @@ Credits
 
 Thanks to everyone who directly contributed to this release:
 
+- andrewtoth
 - Cory Fields
 - Daniel Pfeifer
+- darosior
+- fanquake
 - Hennadii Stepanov
 - jayvaliya
+- junbyjun1238
 - Lőrinc
 - MarcoFalke
 - SomberNight
 - ToRyVand
+- willcl-ark
 
 As well as to everyone that helped with translations on
 [Transifex](https://explore.transifex.com/bitcoin/bitcoin/).