Log Message:
bitcoin: updated to 0.20.0

0.20.0 change log

Mining
* miner: Avoid stack-use-after-return in validationinterface

Block and transaction handling
* log: Fix UB with bench on genesis block
* feefilter: Compute the absolute fee rather than stored rate
* log: Add validation interface logging
* log: Add timing information to FlushStateToDisk()
* O(1) OP_IF/NOTIF/ELSE/ENDIF script implementation
* introduce CChainState::GetCoinsCacheSizeState
* Walk pindexBestHeader back to ChainActive().Tip() if it is invalid
* Remove REJECT code from CValidationState
* Explain why fCheckDuplicateInputs can not be skipped and remove it
* GuessVerificationProgress: cap the ratio to 1
* Templatize ValidationState instead of subclassing
* node: Add reference to mempool in NodeContext
* prevector: Avoid misaligned member accesses
* Improve UpdateTransactionsFromBlock with Epochs
* Abstract out script execution out of VerifyWitnessProgram()
* Make VerifyWitnessProgram use a Span stack
* serialization: prevent int overflow for big Coin::nHeight
* chainparams: Bump assumed valid hash
* Do not clear validationinterface entries being executed

P2P protocol and network code
* Remove BIP61 reject messages
* Supply and use asmap to improve IP bucketing in addrman
* Continue relaying transactions after they expire from mapRelay
* Avoid allocating memory for addrKnown where we don't need it
* tools: add PoissonNextSend method that returns mockable time
* SocketHandler logs peer id for close and disconnect
* Seed RNG with precision timestamps on receipt of net messages
* Fix an uninitialized read in ProcessMessage(…, "tx", …) when \ 
receiving a transaction we already have
* Don't allow resolving of std::string with embedded NUL characters. Add tests
* Fix CNetAddr::IsRFC2544 comment + tests
* config, net, test: Asmap feature refinements and functional tests
* Use rolling bloom filter of recent block txs for AlreadyHave() check
* Remove forcerelay of rejected txs
* Fix some asmap issues
* Reference instead of copy in BlockConnected range loop
* Fix use-after-free in tests
* Make addr relay mockable, add test
* Add missing cs_vNodes lock
* Hardcoded seeds update for 0.20
* Drop unknown types in getdata
* Only send a getheaders for one block in an INV

Wallet
* Replace %w by wallet name in -walletnotify script
* Remove GetDepthInMainChain dependency on locked chain interface
* bumpfee: Return PSBT when wallet has privkeys disabled
* Disable -fallbackfee by default
* Make IsTrusted scan parents recursively
* Change default address type to bech32
* Only check the hash of transactions loaded from disk
* Handle duplicate fileid exception
* descriptors: Introduce sortedmulti descriptor
* Avoid showing GUI popups on RPC errors
* Remove wallet access to some node arguments
* LearnRelatedScripts only if KeepDestination
* Split some CWallet functions into new LegacyScriptPubKeyMan
* Make ScriptPubKeyMan an actual interface and the wallet to have multiple
* Enable BnB coin selection for preset inputs and subtract fee from outputs
* Various fixes and cleanup to keypool handling in LegacyScriptPubKeyMan and CWallet
* Rename db log category to walletdb
* Avoid showing GUI popups on RPC errors
* Make -walletdir network only
* Cleanup and move opportunistic and superfluous TopUp()s
* Remove out of date comments for CalculateMaximumSignedTxSize
* Fix when sufficient preset inputs and subtractFeeFromOutputs
* Activate watchonly wallet behavior for LegacySPKM only
* Document better -keypool as a look-ahead safety mechanism
* Reset reused transactions cache
* Improve CWallet:MarkDestinationsDirty
* Get the OutputType for a descriptor
* Improve LegacyScriptPubKeyMan::CanProvide script recognition
* Pass in transactions and messages for signing instead of exporting the private keys
* Bugfix: Wallet: Safely deal with change in the address book
* descriptors: Improve descriptor cache and cache xpubs
* rpc/wallet: Initialize nFeeRequired to avoid using garbage value on failure
* Remove deprecated fee bumping by totalFee
* Fix wallet unload race condition

RPC and other APIs
* Add RPC Whitelist Feature
* cli: -stdinwalletpassphrase and non-echo stdin passwords
* Add missing fields to wallet rpc help output
* Fix bug where duplicate PSBT keys are accepted
* UTXO snapshot creation
* psbt: Check that various indexes and amounts are within bounds
* Set default bip32derivs to true for psbt methods
* improve getaddressinfo test coverage, help, code docs
* cli: Add "headers" and "verificationprogress" to -getinfo
* replace asserts in RPC code with CHECK_NONFATAL and add linter
* Expose block height of wallet transactions
* Remove unused COINBASE_FLAGS
* Simplify getaddressinfo labels, deprecate previous behavior
* deprecate getaddressinfo label
* Remove vector copy from listtransactions
* Auto-format RPCResult
* Output a descriptor in createmultisig and addmultisigaddress
* Update validateaddress RPCExamples to bech32
* Change RPCExamples to bech32
* Remove redundant types from descriptions
* Document an RPCResult for all calls; Enforce at compile time
* Add missing HelpExampleRpc for getblockfilter
* Fix broken RPCExamples for waitforblock(height)
* Remove final comma for last entry of fixed-size arrays/objects in RPCResult
* Remove unused getbalances() code
* Correctly compute redeemScript from witnessScript for signrawtransaction
* Fix rpcRunLater race in walletpassphrase
* Make rpc documentation not depend on call-time rpc args
* Avoid initialization-order-fiasco on static CRPCCommand tables
* Make verifychain default values static, not depend on global args
* Do not advertise dumptxoutset as a way to flush the chainstate
* Relock wallet only if most recent callback

GUI
* Restore RPC Console to non-wallet tray icon menu
* Don't disable the sync overlay when wallet is disabled
* Show addresses for "SendToSelf" transactions
* Add shortcuts for tab tools
* create PSBT with watch-only wallet
* Change sendcoins dialogue Yes to Send
* Always generate bitcoinstrings.cpp on make translate
* Rename debug window
* Make RPCConsole::TabTypes an enum class
* Add toolTip and placeholderText to sign message fields
* Remove BIP70 support
* Improved tooltip for send amount field
* Add placeholder text to the sign message field
* Send amount placeholder value
* Fix payAmount tooltip in SendCoinsEntry
* Cleaning up hide button tool tip
* Changed tooltip for 'Label' & 'Message' text fields to be more clear
* Fix intro dialog labels when the prune button is toggled
* Bugfix: GUI: Recognise NETWORK_LIMITED in formatServicesStr
* Bump fee returns PSBT on clipboard for watchonly-only wallets
* Remove macOS start on login code
* Show watch-only balance in send screen
* Disable 3rd-party tx-urls when wallet disabled
* Force set nPruneSize in QSettings after the intro dialog
* Move static placeholder texts to forms
* Log Qt related info
* Restore English translation option
* Set CConnman byte counters earlier to avoid uninitialized reads
* Hide HD & encryption icons when no wallet loaded
* Shortcut to close ModalOverlay
* Bugfix: GUI: Hide the HD/encrypt icons earlier so they get re-shown if another \ 
wallet is open
* Drop PeerTableModel dependency to ClientModel
* Fix unintialized WalletView::progressDialog
* Pass clientmodel changes from walletframe to walletviews
* Fix deprecated QCharRef usage
* Throttle GUI update pace when -reindex
* Fix race in WalletModel::pollBalanceChanged
* Avoid Wallet::GetBalance in WalletModel::pollBalanceChanged
* Bump transifex slug and update English translations for 0.20
* Display mapped AS in peers info window
* Translations update pre-branch
* Fix Window -> Minimize menu item
* Fix leak in CoinControlDialog::updateView
* Fix manual coin control with multiple wallets loaded

Build system
* Remove mingw linker workaround from win gitian descriptor
* Use new fork of osslsigncode for windows gitian signing
* Only pass --disable-dependency-tracking to packages that understand it
* Bump libevent to 2.1.11 in depends
* gitian: Various improvements for windows descriptor
* Disable _FORTIFY_SOURCE when enable-debug
* Switch to upstream libdmg-hfsplus
* Remove workaround for ancient libtool
* Added double quotes
* Add variable printing target to Makefiles
* depends macOS: point --sysroot to SDK
* Fix boost mac cross build with clang 9+
* Remove OpenSSL
* Update retry to current version
* nsis: Write to correct filename in first place
* Update univalue subtree
* Update leveldb to 1.22+
* Avoid hardcoded libfaketime dir in gitian
* Fix C{,XX} pickup
* Set gitian arch back to amd64
* Make Travis catch unused variables
* Bump minimum libc to 2.17 for release binaries
* Create test utility library from src/test/util/
* Remove libanl.so.1 from ALLOWED_LIBRARIES
* Fix configure report about qr
* Allow export of environ symbols and work around rv64 toolchain issue
* lcov: filter depends from coverage reports
* Add ability to skip building qrencode
* Support for S390X and POWER targets
* util: Update tinyformat to upstream
* Don't configure xcb_proto
* Remove Qt networking features
* Remove linking librt for backwards compatibility
* Remove configure checks for win libraries we don't link against
* Included test_bitcoin-qt in msvc build
* Remove WINDOWS_BITS from build system
* Set AC_PREREQ to 2.69
* Add -Wdate-time to Werror flags
* Remove double LIBBITCOIN_SERVER linking
* Consistent use of package variable
* guix: Pin Guix using guix time-machine
* pass -fno-ident in Windows gitian descriptor
* Remove --large-address-aware linker flag
* Don't embed a build-id when building libdmg-hfsplus
* Fix behavior when ALLOW_HOST_PACKAGES unset
* Add missing attributes to Win installer
* Skip i686 build by default in guix and gitian
* Add cov_fuzz target
* Add --enable-determinism configure flag
* Add Wreturn-type to Werror flags, check on more Travis machines
* Remove Boost Chrono
* Set minimum Automake version to 1.13
* guix: Remove now-unnecessary gcc make flag
* Use git archive as source tarball
* Fix libevent linking for bench_bitcoin binary
* scripts: Previous_release: improve behaviour on failed download
* Remove double LIBBITCOIN_SERVER from bench-Makefile
* Create test_fuzz library from src/test/fuzz/fuzz.cpp
* Fix boost detection for arch armv7l
* gitian: Add missing automake package to gitian-win-signer.yml
* Check libevent minimum version in configure script
* Ensure source tarball has leading directory name

Platform support
* Add Android NDK support
* macOS toolchain update
* Increase init file stop timeout
* Remove OpenSSL PRNG seeding
* Update README.md with working Android targets and API levels
* Only use D-Bus with Qt on linux
* Set minimum supported macOS to 10.12
* Appveyor install libevent[thread] vcpkg
* Remove deprecated key from macOS Info.plist
* Pass -dead_strip_dylibs to ld on macOS
* Don't use OpenGL in Qt on macOS
* Add -bind_at_load to macOS hardened LDFLAGS
* scripts: Add macho pie check to security-check.py
* random: don't special case clock usage on macOS
* scripts: Add macho dylib checks to symbol-check.py
* msvc: Ignore msvc linker warning and update to msvc build instructions
* windows: Enable heap terminate-on-corruption
* logging: Enable thread_local usage on macos
* Fix .gitignore policy in build_msvc directory
* scripts: Add macho lazy bindings check to security-check.py
* util: Fix compilation with mingw-w64 7.0.0
* Fix sysctl() detection on macOS
* random: remove getentropy() fallback for macOS < 10.12
* scripts: Add pe dylib checking to symbol-check.py
* scripts: Add macho tests to test-security-check.py
* releases: Update with new Windows code signing certificate
* Fix ASLR for bitcoin-cli on Windows

Tests and QA
* Build previous releases and run functional tests
* Add coverage to estimaterawfee and estimatesmartfee
* lint: Run the ci lint stage on mac
* Add getdescriptorinfo functional test
* Add wallet_implicitsegwit to test the ability to transform keys between \ 
address types
* Add ASSERT_DEBUG_LOG to unit test framework
* travis: Run full test suite on native macos
* Use self.chain instead of 'regtest' in all current tests
* add unit test for wallet watch-only methods involving PubKeys
* Add generatetodescriptor RPC
* Fix combine_logs.py for AppVeyor build
* Show debug log on unit test failure
* Seed test RNG context for each test case, print seed
* ci: Use busybox utils for one build
* Fix Python Docstring to include all Args
* ci: Run tests on arm
* Pass fuzzing inputs as constant references
* Add test for loadblock option and linearize scripts
* fix "tx-size-small" errors after default address change
* Speed up wallet_backup by whitelisting peers
* Speed up wallet_address_types by whitelisting peers
* Fix bug in blockfilter_index_tests
* use default address type
* ci: Enable address sanitizer
* Add testcase to simulate bitcoin schema in leveldb
* Remove no longer needed UBSan suppressions
* Add unit testing for the CompressScript function
* Test serialisation as part of deserialisation fuzzing. Test round-trip \ 
equality where possible
* Add RegTestingSetup to setup_common
* travis: Run unit and functional tests on native arm
* Skip unnecessary fuzzer initialisation. Hold ECCVerifyHandle only when needed
* ci: Disable functional tests on mac host
* Fix script_p2sh_tests OP_PUSHBACK2/4 missing
* bench: Fix negative values and zero for -evals flag
* pubkey: Assert CPubKey's ECCVerifyHandle precondition
* Added TestWrapper class for interactive Python environments
* Add new mempool benchmarks for a complex pool
* add reason checks for non-standard txs in test_IsStandard
* Fix input size assertion in wallet_bumpfee.py
* Add rpc_fundrawtransaction logging
* Add shrinkdebugfile=0 to regtest bitcoin.conf
* Speed up fundrawtransaction test
* Do not instantiate CAddrDB for static call CAddrDB::Read()
* Speed up wallet_avoidreuse, add logging
* add "diamond" unit test to MempoolAncestryTests
* Reset global args between test suites
* ci: Run non-cross-compile builds natively
* TestShell: Fix typos & implement cleanups
* Create new test library
* wallet_importmulti: use addresses of the same type as being imported
* Add missing newline in util_ChainMerge test
* Add util_ArgParsing test
* travis: Rework cache_err_msg
* ci: Make ci system read-only on the git work tree
* check custom ancestor limit in mempool_packages.py
* Update valgrind suppressions
* Check custom descendant limit in mempool_packages.py
* Remove fragile assert_memory_usage_stable
* ci: Use clang-8 for fuzzing to run on aarch64 ci systems
* Add unit test for non-standard txs with too large scriptSig
* Skip tests when utils haven't been compiled
* Add unit test for non-standard bare multisig txs
* Add bounds checks before base58 decoding
* ci: Bump to clang-8 for asan build to avoid segfaults on ppc64le
* Wait until mempool is loaded in wallet_abandonconflict
* Add functional test for non-standard txs with too large scriptSig
* Add functional test for non-standard bare multisig txs
* Add unit test for non-standard txs with wrong nVersion
* Add libtest_util library to msvc build configuration
* ci: Add big endian platform - s390x
* Move more utility functions into test utility library
* Add option --valgrind to run the functional tests under Valgrind
* ci: Add centos 7 build
* Add unit test for leveldb creation with unicode path
* Add initialization order fiasco detection in Travis
* Enable tests which are incorrectly skipped when running test_runner.py --usecli
* Fix bug in the descriptor parsing fuzzing harness
* re-enable CLI test support by using EncodeDecimal in json.dumps()
* add unit test for non-standard "scriptsig-not-pushonly" txs
* ci: Fix qemu issues
* ci: Update github actions ci vcpkg cache on msbuild update
* Change filemode of rpc_whitelist.py
* ci: Fix brew python link
* Add std::to_string to list of locale dependent functions
* Fix double-negative arg test
* ci: Combine 32-bit build with centos 7 build
* Test OP_CSV empty stack fail in feature_csv_activation.py
* Fix p2p_invalid_messages failing in Python 3.8 because of warning
* add unit test for non-standard txs with too large tx size
* Check specific reject reasons in feature_csv_activation.py
* Add p2p test for forcerelay permission
* Updated appveyor job to checkout a specific vcpkg commit ID
* fix fuzzing using libFuzzer on macOS
* bench: Fix benchmarks filters
* reset fIsBareMultisigStd after bare-multisig tests
* Fix appveyor test_bitcoin build of *.raw
* util: Allow scheduler to be mocked
* ci: Check for submodules
* Replace 'regtest' leftovers by self.chain
* Set a name for CI Docker containers
* Avoid hitting some known minor tinyformat issues when fuzzing strprintf(…)
* Add harness which fuzzes EvalScript and VerifyScript using a fuzzed signature \ 
checker
* Add --valgrind option to test/fuzz/test_runner.py for running fuzzing test \ 
cases under valgrind
* ci: Run fuzz testing test cases
* Transaction expiry from mempool
* Remove incorrect assumptions in validation_flush_tests
* Set catch_system_errors=no on boost unit tests
* Add cost_of_change parameter assertions to bnb_search_test
* Reduce unneeded whitelist permissions in tests
* Disable mockforward scheduler unit test for now
* Fix race in p2p_segwit
* Make AnalyzePSBT next role calculation simple, correct
* Add missing syncwithvalidationinterfacequeue
* Wait for both veracks in add_p2p_connection
* Bump timeouts to accomodate really slow disks
* Add bad-txns-*-toolarge test cases to invalid_txs
* rpc: change setmocktime check to use IsMockableChain
* Check that wait_until returns if time point is in the past
* Add locale fuzzer to FUZZERS_MISSING_CORPORA
* fuzz: Add assert(script == decompressed_script)
* Update FUZZERS_MISSING_CORPORA to enable regression fuzzing for all harnesses \ 
in master
* fuzz: Add option to merge input dir to test runner
* Explain why test logging should be used
* Add logging to wallet_listsinceblock.py
* Bumpfee test fix
* Add deserialization fuzzing of SnapshotMetadata
* fuzz: Add missing ECC_Start to key_io test
* Add basic test for BIP 37
* Fix mining to an invalid target + ensure that a new block has the correct hash \ 
internally
* Bugfix & simplify bn2vch using int.to_bytes
* Don't assume presence of __builtin_mul_overflow(…) in \ 
MultiplicationOverflow(…) fuzzing harness
* add executable flag for rpc_estimatefee.py
* listsinceblock block height checks
* ci: Only clone bitcoin-core/qa-assets when fuzzing
* ci: Use homebrew addon on native macos
* Add coverage for script parse error in ParseScript
* Remove unsafe BOOST_TEST_MESSAGE
* check that peer is connected when calling sync_*
* ci: Use focal for fuzzers
* add BIP37 'filterclear' test to p2p_filter.py
* Remove redundant sync_with_ping after add_p2p_connection
* fuzz: Avoid running over all inputs after merging them
* fuzz: Add CScriptNum::getint coverage
* remove rapidcheck integration and tests
* Add BIP37 remote crash bug [CVE-2013-5700] test to p2p_filter.py
* relax bumpfee dust_to_fee txsize an extra vbyte
* fuzz: Extend descriptor fuzz test
* fuzz: Extend script fuzz test
* fuzz: Add process_messages harness
* Add fuzzer version of randomized prevector test
* skip backwards compat tests if not compiled with wallet
* wallet_bumpfee assertion fixup
* Use one node to avoid a race due to missing sync in rpc_signrawtransaction
* Properly raise FailedToStartError when rpc shutdown before warmup finished
* ci: Run unit tests sequential once
* Fix unregister_all_during_call cleanup
* Set -use_value_profile=1 when merging fuzz inputs
* Remove enumeration of expected deserialization exceptions in \ 
ProcessMessage(…) fuzzer
* Add test for conflicted wallet tx notifications
* Remove const to work around compiler error on xenial

Documentation
* Doxygen-friendly script/descriptor.h comments
* Add detailed info about Bitcoin Core files
* Doxygen-friendly CuckooCache comments
* move-only: Steps for "before major release branch-off"
* Update bips.md for default bech32 addresses in 0.20.0
* Fix Makefile target in benchmarking.md
* Add missing indexes/blockfilter/basic to doc/files.md
* Fix broken bitcoin-cli examples
* Add switch on enum example to developer notes
* Update macdeploy README to include all files produced by make deploy
* github: Add warning for bug reports
* Added instructions for how to add an upsteam to forked repo
* Add a note about backporting
* Correct function name in ReportHardwareRand()
* Describe log files + consistent paths in test READMEs
* Changed miniupnp links to https
* Add developer note on c_str()
* Bip70 removal follow-up
* Fix help-debug -checkpoints
* update MSVC instructions to remove Qt OpenSSL linking
* Add template for good first issues
* Fix some misspellings
* Add ShellCheck to lint tests dependencies
* Update doc/bips.md with recent changes in master
* Added regtest config for linearize script
* Add some better examples for scripted diff
* Remove bitness from bitcoin-qt help message and manpage
* Update and improve Developer Notes
* Changed MiniUPnPc link to https in dependencies.md
* Change doxygen URL to doxygen.bitcoincore.org
* Update release process with latest changes
* Unify unix epoch time descriptions
* script: Add keyserver to verify-commits readme
* Rename wallet-tool references to bitcoin-wallet
* Add "ci" prefix to CONTRIBUTING.md
* Use recommended shebang approach in documentation code block
* Fix directory path for secp256k1 subtree in developer-notes
* Mention PR Club in CONTRIBUTING.md
* Misc RPC help fixes
* Developer notes guideline on RPCExamples addresses
* Update dependencies.md
* Add to Doxygen documentation guidelines
* Fix improper Doxygen inline comments
* Improve fuzzing docs for macOS users
* Fix doxygen errors
* Add missing supported rpcs to doc/descriptors.md
* Add note about brew doctor
* Remove PPA note from release-process.md
* Minor grammatical changes and flow improvements
* Add missing step in win deployment instructions
* Add warning against wallet.dat re-use
* Correct spelling errors in comments
* interfaces: Describe and follow some code conventions
* Explain rebase policy in CONTRIBUTING.md
* Mention MAKE=gmake workaround when building on a BSD
* Replace remaining literal BTC with CURRENCY_UNIT
* Add fuzzing quickstart guides for libFuzzer and afl-fuzz
* Fix nit in getblockchaininfo
* Comment fix merkle.cpp
* note the costs of fetching all pull requests
* Update init and reduce-traffic docs for -blocksonly
* Block-relay-only vs blocksonly
* Explain new test logging
* Update webchat URLs in README.md
* Fix git add argument
* Correct scripted-diff example link
* Fix naming of macOS SDK and clarify version

Miscellaneous
* lockedpool: When possible, use madvise to avoid including sensitive \ 
information in core dumps
* Merge settings one place instead of five places
* On bitcoind startup, write config args to debug.log
* util: Replace boost sleep with std sleep
* util: Fix compilation errors in support/lockedpool.cpp
* scripts: In linearize, search for next position of magic bytes rather than fail
* Add some general std::vector utility functions
* contrib: Bump gitian descriptors for 0.20
* scripts: Update copyright_header script to include additional files
* util: Simplify path argument for cblocktreedb ctor
* random: Remove call to RAND_screen()
* util: Add check_nonfatal and use it in src/rpc
* Replace the LogPrint function with a macro
* util: Rename decodedumptime to parseiso8601datetime
* Feed environment data into RNG initializers
* contrib: Remove accounts from bash completion
* Add assertion to randrange that input is not 0
* log: Fix log message for -par=1
* linter: Strip trailing / in path for git-subtree-check
* scripts: Search for first block file for linearize-data with some block files \ 
pruned
* scripts: Lint gitian descriptors with shellcheck
* util: Disallow network-qualified command line options
* random: mark RandAddPeriodic and SeedPeriodic as noexcept
* Fix CPUID subleaf iteration
* util: Make schedulebatchpriority advisory only
* util: Remove unwanted fields from bitcoin-cli -getinfo
* script: Fixed wget call in gitian-build.py
* Make env data logging optional
* util: Don't allow base58 decoding of non-base58 strings. add base58 tests
* util: Change getwarnings parameter to bool
* util: Don't allow base32/64-decoding or parsemoney(…) on strings with \ 
embedded nul characters. add tests
* scripts: Read suspicious hosts from a file instead of hardcoding
* util: Avoid potential uninitialized read in formatiso8601datetime(int64_t) by \ 
checking gmtime_s/gmtime_r return value
* Fix a violation of C++ standard rules where unions are used for type-punning
* util: Fail to parse empty string in parsemoney
* util: Fail to parse whitespace-only strings in parsemoney(…)
* util: Helpexamplerpc formatting
* Fix missing header in sync.h
* script: Fix script_err_sig_pushonly error string
* util: Limit decimal range of numbers parsescript accepts
* init: Replace URL_WEBSITE with PACKAGE_URL
* Remove PID file at the very end
* Avoid non-trivial global constants in SHA-NI code
* Do not expose and consider -logthreadnames when it does not work