Bring Elements up to date with Bitcoin Core 0.21

.appveyor.yml

@@ -1,58 +1,62 @@
 version: '{branch}.{build}'
 skip_tags: true
-image: Visual Studio 2017
+image: Previous Visual Studio 2019
 configuration: Release
 platform: x64
 clone_depth: 5
 environment:
-  APPVEYOR_SAVE_CACHE_ON_ERROR: true
-  CLCACHE_SERVER: 1
-  PACKAGES: berkeleydb boost-filesystem boost-signals2 boost-test libevent openssl rapidcheck zeromq
   PATH: 'C:\Python37-x64;C:\Python37-x64\Scripts;%PATH%'
   PYTHONUTF8: 1
-cache:
-- C:\tools\vcpkg\installed -> appveyor.yml
-- C:\Users\appveyor\clcache -> appveyor.yml, build_msvc\**, **\Makefile.am, **\*.vcxproj.in
+  QT_DOWNLOAD_URL: 'https://github.com/sipsorcery/qt_win_binary/releases/download/v1.6/Qt5.9.8_x64_static_vs2019.zip'
+  QT_DOWNLOAD_HASH: '9a8c6eb20967873785057fdcd329a657c7f922b0af08c5fde105cc597dd37e21'
+  QT_LOCAL_PATH: 'C:\Qt5.9.8_x64_static_vs2019'
+  VCPKG_INSTALL_PATH: 'C:\tools\vcpkg\installed'
+  VCPKG_COMMIT_ID: '40230b8e3f6368dcb398d649331be878ca1e9007'
 install:
-- cmd: pip install --quiet git+https://github.com/frerich/clcache.git@v4.2.0
 # Disable zmq test for now since python zmq library on Windows would cause Access violation sometimes.
 # - cmd: pip install zmq
-- cmd: vcpkg remove --outdated --recurse
-- cmd: vcpkg install --triplet %PLATFORM%-windows-static %PACKAGES% > NUL
-- cmd: del /s /q C:\Tools\vcpkg\installed\%PLATFORM%-windows-static\debug # Remove unused debug library
+# Powershell block below is to install the c++ dependencies via vcpkg. The pseudo code is:
+#    a. Checkout the vcpkg source (including port files) for the specific checkout and build the vcpkg binary,
+#    b. Install the missing packages using the vcpkg manifest.
+- ps: |
+      cd c:\tools\vcpkg
+      $env:GIT_REDIRECT_STDERR = '2>&1' # git is writing non-errors to STDERR when doing git pull. Send to STDOUT instead.
+      git pull origin master > $null
+      git -c advice.detachedHead=false checkout $env:VCPKG_COMMIT_ID
+      .\bootstrap-vcpkg.bat > $null
+      cd "$env:APPVEYOR_BUILD_FOLDER"
 before_build:
-- ps:  clcache -M 536870912
+# Powershell block below is to download and extract the Qt static libraries. The pseudo code is:
+#    a. Download the zip file with the prebuilt Qt static libraries.
+#    b. Check that the downloaded file matches the expected hash.
+#    c. Extract the zip file to the specific destination path expected by the msbuild projects.
+- ps: |
+      Write-Host "Downloading Qt binaries.";
+      Invoke-WebRequest -Uri $env:QT_DOWNLOAD_URL -Out qtdownload.zip;
+      Write-Host "Qt binaries successfully downloaded, checking hash against $env:QT_DOWNLOAD_HASH...";
+      if((Get-FileHash qtdownload.zip).Hash -eq $env:QT_DOWNLOAD_HASH) {
+        Expand-Archive qtdownload.zip -DestinationPath $env:QT_LOCAL_PATH;
+        Write-Host "Qt binary download matched the expected hash.";
+      }
+      else {
+        Write-Host "ERROR: Qt binary download did not match the expected hash.";
+        Exit-AppveyorBuild;
+      }
 - cmd: python build_msvc\msvc-autogen.py
-- ps:  $files = (Get-ChildItem -Recurse | where {$_.extension -eq ".vcxproj"}).FullName
-- ps:  for (${i} = 0; ${i} -lt ${files}.length; ${i}++) {
-           ${content} = (Get-Content ${files}[${i}]);
-           ${content} = ${content}.Replace("</RuntimeLibrary>", "</RuntimeLibrary><DebugInformationFormat>None</DebugInformationFormat>");
-           ${content} = ${content}.Replace("<WholeProgramOptimization>true", "<WholeProgramOptimization>false");
-           Set-Content ${files}[${i}] ${content};
-       }
-- ps:  Start-Process clcache-server
-- ps:  fsutil behavior set disablelastaccess 0 # Enable Access time feature on Windows (for clcache)
 build_script:
-- cmd: msbuild /p:TrackFileAccess=false /p:CLToolExe=clcache.exe build_msvc\bitcoin.sln /m /v:q /nologo
+- cmd: msbuild /p:TrackFileAccess=false build_msvc\bitcoin.sln /m /v:q /nologo
 after_build:
-- ps:  fsutil behavior set disablelastaccess 1 # Disable Access time feature on Windows (better performance)
-- ps:  clcache -z
-before_test:
-- ps:  ${conf_ini} = (Get-Content([IO.Path]::Combine(${env:APPVEYOR_BUILD_FOLDER}, "test", "config.ini.in")))
-- ps:  ${conf_ini} = ${conf_ini}.Replace("@abs_top_srcdir@", ${env:APPVEYOR_BUILD_FOLDER})
-- ps:  ${conf_ini} = ${conf_ini}.Replace("@abs_top_builddir@", ${env:APPVEYOR_BUILD_FOLDER})
-- ps:  ${conf_ini} = ${conf_ini}.Replace("@EXEEXT@", ".exe")
-- ps:  ${conf_ini} = ${conf_ini}.Replace("@ENABLE_WALLET_TRUE@", "")
-- ps:  ${conf_ini} = ${conf_ini}.Replace("@BUILD_BITCOIN_CLI_TRUE@", "")
-- ps:  ${conf_ini} = ${conf_ini}.Replace("@BUILD_BITCOIND_TRUE@", "")
-- ps:  ${conf_ini} = ${conf_ini}.Replace("@ENABLE_ZMQ_TRUE@", "")
-- ps:  ${utf8} = New-Object System.Text.UTF8Encoding ${false}
-- ps:  '[IO.File]::WriteAllLines([IO.Path]::Combine(${env:APPVEYOR_BUILD_FOLDER}, "test", "config.ini"), ${conf_ini}, ${utf8})'
-- ps:  move "build_msvc\${env:PLATFORM}\${env:CONFIGURATION}\*.exe" src
+#- 7z a bitcoin-%APPVEYOR_BUILD_VERSION%.zip %APPVEYOR_BUILD_FOLDER%\build_msvc\%platform%\%configuration%\*.exe
 test_script:
-- cmd: src\test_bitcoin.exe -k stdout -e stdout 2> NUL
-- cmd: src\bench_bitcoin.exe -evals=1 -scaling=0 > NUL
+- cmd: src\test_bitcoin.exe -l test_suite
+- cmd: src\bench_bitcoin.exe > NUL
 - ps:  python test\util\bitcoin-util-test.py
 - cmd: python test\util\rpcauth-test.py
-- cmd: python test\functional\test_runner.py --ci --quiet --combinedlogslen=4000 --failfast
+# Fee estimation test failing on appveyor with: WinError 10048] Only one usage of each socket address (protocol/network address/port) is normally permitted.
+# functional tests disabled for now. See
+# https://github.com/bitcoin/bitcoin/pull/18626#issuecomment-613396202
+# https://github.com/bitcoin/bitcoin/issues/18623
+# - cmd: python test\functional\test_runner.py --ci --quiet --combinedlogslen=4000 --failfast --exclude feature_fee_estimation
+artifacts:
+#- path: bitcoin-%APPVEYOR_BUILD_VERSION%.zip
 deploy: off

.cirrus.yml

@@ -0,0 +1,146 @@
+### Global defaults
+
+timeout_in: 120m  # https://cirrus-ci.org/faq/#instance-timed-out
+container:
+  # https://cirrus-ci.org/faq/#are-there-any-limits
+  # Each project has 16 CPU in total, assign 2 to each container, so that 8 tasks run in parallel
+  cpu: 2
+  memory: 8G  # Set to 8GB to avoid OOM. https://cirrus-ci.org/guide/linux/#linux-containers
+  kvm: true  # Use kvm to avoid spurious CI failures in the default virtualization cluster, see https://github.com/bitcoin/bitcoin/issues/20093
+env:
+  SECP256K1_TEST_ITERS: 16 # ELEMENTS: avoid test timeouts on arm
+  PACKAGE_MANAGER_INSTALL: "apt-get update && apt-get install -y"
+  MAKEJOBS: "-j3" # ELEMENTS: reduced from j4
+  DANGER_RUN_CI_ON_HOST: "1"  # Containers will be discarded after the run, so there is no risk that the ci scripts modify the system
+  TEST_RUNNER_PORT_MIN: "14000"  # Must be larger than 12321, which is used for the http cache. See https://cirrus-ci.org/guide/writing-tasks/#http-cache
+  CCACHE_SIZE: "200M"
+  CCACHE_DIR: "/tmp/ccache_dir"
+
+### Global task template
+
+# https://cirrus-ci.org/guide/tips-and-tricks/#sharing-configuration-between-tasks
+global_task_template: &GLOBAL_TASK_TEMPLATE
+  skip: $CIRRUS_REPO_FULL_NAME == "bitcoin-core/gui" && $CIRRUS_PR == ""  # No need to run on the read-only mirror, unless it is a PR. https://cirrus-ci.org/guide/writing-tasks/#conditional-task-execution
+  ccache_cache:
+    folder: "/tmp/ccache_dir"
+  depends_built_cache:
+    folder: "/tmp/cirrus-ci-build/depends/built"
+  depends_sdk_cache:
+    folder: "/tmp/cirrus-ci-build/depends/sdk-sources"
+  depends_releases_cache:
+    folder: "/tmp/cirrus-ci-build/releases"
+  merge_base_script:
+    - if [ "$CIRRUS_PR" = "" ]; then exit 0; fi
+    - bash -c "$PACKAGE_MANAGER_INSTALL git"
+    - git fetch $CIRRUS_REPO_CLONE_URL $CIRRUS_BASE_BRANCH
+    - git config --global user.email "ci@ci.ci"
+    - git config --global user.name "ci"
+    - git merge FETCH_HEAD  # Merge base to detect silent merge conflicts
+  ci_script:
+    - ./ci/test_run_all.sh
+
+#task:
+#  name: "Windows"
+#  windows_container:
+#    image: cirrusci/windowsservercore:2019
+#  env:
+#    CIRRUS_SHELL: powershell
+#    PATH: 'C:\Python37;C:\Python37\Scripts;%PATH%'
+#    PYTHONUTF8: 1
+#    QT_DOWNLOAD_URL: 'https://github.com/sipsorcery/qt_win_binary/releases/download/v1.6/Qt5.9.8_x64_static_vs2019.zip'
+#    QT_DOWNLOAD_HASH: '9a8c6eb20967873785057fdcd329a657c7f922b0af08c5fde105cc597dd37e21'
+#    QT_LOCAL_PATH: 'C:\Qt5.9.8_x64_static_vs2019'
+#    VCPKG_INSTALL_PATH: 'C:\tools\vcpkg\installed'
+#    VCPKG_COMMIT_ID: 'ed0df8ecc4ed7e755ea03e18aaf285fd9b4b4a74'
+#  install_script:
+#    - choco install python --version=3.7.7 -y
+
+task:
+  name: 'ARM  [GOAL: install]  [buster]  [unit tests, no functional tests]'
+  << : *GLOBAL_TASK_TEMPLATE
+  container:
+    image: debian:buster
+  env:
+    FILE_ENV: "./ci/test/00_setup_env_arm.sh"
+
+task:
+  name: 'Win64  [GOAL: deploy]  [unit tests, no gui, no boost::process, no functional tests]'
+  << : *GLOBAL_TASK_TEMPLATE
+  container:
+    image: ubuntu:bionic
+  env:
+    FILE_ENV: "./ci/test/00_setup_env_win64.sh"
+
+task:
+  name: 'x86_64 Linux  [GOAL: install]  [bionic]  [C++17, previous releases, uses qt5 dev package and some depends packages] [unsigned char]'
+  << : *GLOBAL_TASK_TEMPLATE
+  container:
+    image: ubuntu:bionic
+  env:
+    FILE_ENV: "./ci/test/00_setup_env_native_qt5.sh"
+
+task:
+  name: 'x86_64 Linux  [GOAL: install]  [focal]  [depends, sanitizers: thread (TSan), no gui]'
+  << : *GLOBAL_TASK_TEMPLATE
+  container:
+    image: ubuntu:focal
+    cpu: 4  # Double CPU and Memory to avoid timeout
+    memory: 16G
+  env:
+    MAKEJOBS: "-j6" # ELEMENTS: reduced from -j8
+    FILE_ENV: "./ci/test/00_setup_env_native_tsan.sh"
+
+task:
+  name: 'x86_64 Linux  [GOAL: install]  [focal]  [depends, sanitizers: memory (MSan)]'
+  << : *GLOBAL_TASK_TEMPLATE
+  container:
+    image: ubuntu:focal
+  env:
+    FILE_ENV: "./ci/test/00_setup_env_native_msan.sh"
+
+task:
+  name: 'x86_64 Linux  [GOAL: install]  [focal]  [no depends, only system libs, sanitizers: address/leak (ASan + LSan) + undefined (UBSan) + integer]'
+  << : *GLOBAL_TASK_TEMPLATE
+  container:
+    image: ubuntu:focal
+    memory: 12G # ELEMENTS: need more memory
+  env:
+    FILE_ENV: "./ci/test/00_setup_env_native_asan.sh"
+
+task:
+  name: 'x86_64 Linux  [GOAL: install]  [focal]  [no depends, only system libs, sanitizers: fuzzer,address,undefined]'
+  << : *GLOBAL_TASK_TEMPLATE
+  container:
+    image: ubuntu:focal
+  env:
+    FILE_ENV: "./ci/test/00_setup_env_native_fuzz.sh"
+
+task:
+  name: 'x86_64 Linux [GOAL: install]  [focal]  [multiprocess]'
+  << : *GLOBAL_TASK_TEMPLATE
+  container:
+    image: ubuntu:focal
+  env:
+    FILE_ENV: "./ci/test/00_setup_env_native_multiprocess.sh"
+
+task:
+  name: 'macOS 10.12  [GOAL: deploy] [no functional tests]'
+  << : *GLOBAL_TASK_TEMPLATE
+  container:
+    image: ubuntu:bionic
+  env:
+    FILE_ENV: "./ci/test/00_setup_env_mac.sh"
+
+task:
+  name: 'macOS 10.14 native [GOAL: install] [GUI] [no depends]'
+  macos_brew_addon_script:
+    - brew install boost libevent berkeley-db4 qt miniupnpc ccache zeromq qrencode sqlite libtool automake pkg-config gnu-getopt
+  << : *GLOBAL_TASK_TEMPLATE
+  osx_instance:
+    # Use latest image, but hardcode version to avoid silent upgrades (and breaks)
+    image: catalina-xcode-12.1  # https://cirrus-ci.org/guide/macOS
+  env:
+    DANGER_RUN_CI_ON_HOST: "true"
+    CI_USE_APT_INSTALL: "no"
+    PACKAGE_MANAGER_INSTALL: "echo"  # Nothing to do
+    FILE_ENV: "./ci/test/00_setup_env_mac_host.sh"

.fuzzbuzz.yml

@@ -0,0 +1,16 @@
+base: ubuntu:16.04
+language: c++
+engine: libFuzzer
+environment:
+  - CXXFLAGS=-fcoverage-mapping -fno-omit-frame-pointer -fprofile-instr-generate -gline-tables-only -O1
+setup:
+  - sudo apt-get update
+  - sudo apt-get install -y autoconf bsdmainutils clang git libboost-all-dev libboost-program-options-dev libc++1 libc++abi1 libc++abi-dev libc++-dev libclang1 libclang-dev libdb5.3++ libevent-dev libllvm-ocaml-dev libomp5 libomp-dev libprotobuf-dev libqt5core5a libqt5dbus5 libqt5gui5 libssl-dev libtool llvm llvm-dev llvm-runtime pkg-config protobuf-compiler qttools5-dev qttools5-dev-tools software-properties-common
+  - ./autogen.sh
+  - CC=clang CXX=clang++ ./configure --enable-fuzz --with-sanitizers=address,fuzzer,undefined
+  - make
+  - git clone https://github.com/bitcoin-core/qa-assets
+auto_targets:
+  find_targets_command: find src/test/fuzz/ -executable -type f ! -name "*.cpp" ! -name "*.h"
+  base_corpus_dir: qa-assets/fuzz_seed_corpus/
+  memory_limit: none

.github/ISSUE_TEMPLATE.md

@@ -4,7 +4,11 @@ General bitcoin questions and/or support requests are best directed to the Bitco
 
 For reporting security issues, please read instructions at https://bitcoincore.org/en/contact/.
 
-If the node is "stuck" during sync or giving "block checksum mismatch" errors, please ensure your hardware is stable by running memtest and observe CPU temperature with a load-test tool such as linpack before creating an issue! -->
+If the node is "stuck" during sync or giving "block checksum mismatch" errors, please ensure your hardware is stable by running memtest and observe CPU temperature with a load-test tool such as linpack before creating an issue!
+
+Any report, issue or feature request related to the GUI should be reported at
+https://github.com/bitcoin-core/gui/issues/
+-->
 
 <!-- Describe the issue -->
 <!--- What behavior did you expect? -->
@@ -17,7 +21,7 @@ If the node is "stuck" during sync or giving "block checksum mismatch" errors, p
 
 <!-- What type of machine are you observing the error on (OS/CPU and disk type)? -->
 
-<!-- For the GUI-related issue on Linux provide names and versions of a distro, a desktop environment and a graphical shell (if relevant). -->
+<!-- GUI-related issue? What is your operating system and its version? If Linux, what is your desktop environment and graphical shell? -->
 
 <!-- Any extra information that might be useful in the debugging process. -->
 <!--- This is normally the contents of a `debug.log` or `config.log` file. Raw text or a link to a pastebin type site are preferred. -->

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,41 @@
+---
+name: Bug report
+about: Create a report to help us improve (use this for suspected bugs only, if not sure, open a regular issue below)
+title: ''
+labels: Bug
+assignees: ''
+
+---
+
+<!-- This issue tracker is only for technical issues related to Bitcoin Core.
+
+General bitcoin questions and/or support requests are best directed to the Bitcoin StackExchange at https://bitcoin.stackexchange.com.
+
+For reporting security issues, please read instructions at https://bitcoincore.org/en/contact/.
+
+If the node is "stuck" during sync or giving "block checksum mismatch" errors, please ensure your hardware is stable by running memtest and observe CPU temperature with a load-test tool such as linpack before creating an issue! -->
+
+<!-- Describe the issue -->
+
+**Expected behavior**
+
+<!--- What behavior did you expect? -->
+
+**Actual behavior**
+
+<!--- What was the actual behavior (provide screenshots if the issue is GUI-related)? -->
+
+**To reproduce**
+
+<!--- How reliably can you reproduce the issue, what are the steps to do so? -->
+
+**System information**
+
+<!-- What version of Bitcoin Core are you using, where did you get it (website, self-compiled, etc)? -->
+
+<!-- What type of machine are you observing the error on (OS/CPU and disk type)? -->
+
+<!-- GUI-related issue? What is your operating system and its version? If Linux, what is your desktop environment and graphical shell? -->
+
+<!-- Any extra information that might be useful in the debugging process. -->
+<!--- This is normally the contents of a `debug.log` or `config.log` file. Raw text or a link to a pastebin type site are preferred. -->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: Feature
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+<!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
+
+**Describe the solution you'd like**
+<!-- A clear and concise description of what you want to happen. -->
+
+**Describe alternatives you've considered**
+<!-- A clear and concise description of any alternative solutions or features you've considered. -->
+
+**Additional context**
+<!-- Add any other context or screenshots about the feature request here. -->

.github/ISSUE_TEMPLATE/good_first_issue.md

@@ -0,0 +1,22 @@
+---
+name: Good first issue
+about: '(Regular devs only): Suggest a new good first issue'
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!-- Needs the label "good first issue" assigned manually before or after opening -->
+
+<!-- A good first issue is an uncontroversial issue, that has a relatively unique and obvious solution -->
+
+<!-- Motivate the issue and explain the solution briefly -->
+
+#### Useful skills:
+
+<!-- (For example, “C++11 std::thread”, “Qt5 GUI and async GUI design” or “basic understanding of Bitcoin mining and the Bitcoin Core RPC interface”.) -->
+
+#### Want to work on this issue?
+
+For guidance on contributing, please read [CONTRIBUTING.md](https://github.com/bitcoin/bitcoin/blob/master/CONTRIBUTING.md) before opening your pull request.

.github/ISSUE_TEMPLATE/gui_issue.md

@@ -0,0 +1,11 @@
+---
+name: An issue or feature request related to the GUI
+about: Any report, issue or feature request related to the GUI should be reported at https://github.com/bitcoin-core/gui/issues/
+title: Any report, issue or feature request related to the GUI should be reported at https://github.com/bitcoin-core/gui/issues/
+labels: GUI
+assignees: ''
+
+---
+
+Any report, issue or feature request related to the GUI should be reported at
+https://github.com/bitcoin-core/gui/issues/