Bitcoin Forum

0.20.0 Release Notes

Bitcoin Core version 0.20.0 is now available from:

https://bitcoincore.org/bin/bitcoin-core-0.20.0/ (https://bitcoincore.org/bin/bitcoin-core-0.20.0/)

This release includes new features, various bug fixes and performance
improvements, as well as updated translations.

Please report bugs using the issue tracker at GitHub:

https://github.com/bitcoin/bitcoin/issues (https://github.com/bitcoin/bitcoin/issues)

To receive security and update notifications, please subscribe to:

https://bitcoincore.org/en/list/announcements/join/ (https://bitcoincore.org/en/list/announcements/join/)

How to Upgrade

If you are running an older version, shut it down. Wait until it has completely
shut down (which might take a few minutes in some cases), then run the
installer (on Windows) or just copy over /Applications/Bitcoin-Qt (on Mac)
or bitcoind/bitcoin-qt (on Linux).

Upgrading directly from a version of Bitcoin Core that has reached its EOL is
possible, but it might take some time if the data directory needs to be migrated. Old
wallet versions of Bitcoin Core are generally supported.

Compatibility

Bitcoin Core is supported and extensively tested on operating systems
using the Linux kernel, macOS 10.12+, and Windows 7 and newer.  Bitcoin
Core should also work on most other Unix-like systems but is not as
frequently tested on them.  It is not recommended to use Bitcoin Core on
unsupported systems.

From Bitcoin Core 0.20.0 onwards, macOS versions earlier than 10.12 are no
longer supported. Additionally, Bitcoin Core does not yet change appearance
when macOS "dark mode" is activated.

Known Bugs

The process for generating the source code release ("tarball") has changed in an
effort to make it more complete, however, there are a few regressions in
this release:

• The generated configure script is currently missing, and you will need to
    install autotools and run ./autogen.sh before you can run
    ./configure. This is the same as when checking out from git.
  
• Instead of running make simply, you should instead run
    BITCOIN_GENBUILD_NO_GIT=1 make.
  

Notable changes

P2P and network changes
Removal of BIP61 reject network messages from Bitcoin Core

The -enablebip61 command line option to enable BIP61 has been removed.
(#17004 (https://github.com/bitcoin/bitcoin/pull/17004))

This feature has been disabled by default since Bitcoin Core version 0.18.0.
Nodes on the network can not generally be trusted to send valid messages
(including reject messages), so this should only ever be used when
connected to a trusted node.  Please use the alternatives recommended
below if you rely on this removed feature:

• Testing or debugging of implementations of the Bitcoin P2P network protocol
    should be done by inspecting the log messages that are produced by a recent
    version of Bitcoin Core. Bitcoin Core logs debug messages
    (-debug=<category>) to a stream (-printtoconsole) or to a file
    (-debuglogfile=<debug.log>).
  
• Testing the validity of a block can be achieved by specific RPCs:
  
• submitblock
  
• getblocktemplate with 'mode' set to 'proposal' for blocks with
      potentially invalid POW
  
• Testing the validity of a transaction can be achieved by specific RPCs:
  
• sendrawtransaction
  
• testmempoolaccept
  
• Wallets should not assume a transaction has propagated to the network
    just because there are no reject messages.  Instead, listen for the
    transaction to be announced by other peers on the network.  Wallets
    should not assume a lack of reject messages means a transaction pays
    an appropriate fee.  Instead, set fees using fee estimation and use
    replace-by-fee to increase a transaction's fee if it hasn't confirmed
    within the desired amount of time.
  

The removal of BIP61 reject message support also has the following minor RPC
and logging implications:

• testmempoolaccept and sendrawtransaction no longer return the P2P reject
    code when a transaction is not accepted to the mempool. They still return the
    verbal reject reason.
  
• Log messages that previously reported the reject code when a transaction was
    not accepted to the mempool now no longer report the reject code. The reason
    for rejection is still reported.
  

Updated RPCs

• The RPCs which accept descriptors now accept the new sortedmulti(...) descriptor
    type which supports multisig scripts where the public keys are sorted
    lexicographically in the resulting script.  (#17056 (https://github.com/bitcoin/bitcoin/pull/17056))
  
• The walletprocesspsbt and walletcreatefundedpsbt RPCs now include
    BIP32 derivation paths by default for public keys if we know them.
    This can be disabled by setting the bip32derivs parameter to
    false.  (#17264 (https://github.com/bitcoin/bitcoin/pull/17264))
  
• The bumpfee RPC's parameter totalFee, which was deprecated in
    0.19, has been removed.  (#18312 (https://github.com/bitcoin/bitcoin/pull/18312))
  
• The bumpfee RPC will return a PSBT when used with wallets that have
    private keys disabled.  (#16373 (https://github.com/bitcoin/bitcoin/pull/16373))
  
• The getpeerinfo RPC now includes a mapped_as field to indicate the
    mapped Autonomous System used for diversifying peer selection. See the
    -asmap configuration option described below in <em>New Settings</em>.  (#16702 (https://github.com/bitcoin/bitcoin/pull/16702))
  
• The createmultisig and addmultisigaddress RPCs now return an
    output script descriptor for the newly created address.  (#18032 (https://github.com/bitcoin/bitcoin/pull/18032))
  

Build System

• OpenSSL is no longer used by Bitcoin Core.  (#17265 (https://github.com/bitcoin/bitcoin/pull/17265))
  
• BIP70 support has been fully removed from Bitcoin Core. The
    --enable-bip70 option remains, but it will throw an error during configure.
    (#17165 (https://github.com/bitcoin/bitcoin/pull/17165))
  
• glibc 2.17 or greater is now required to run the release binaries. This
    retains compatibility with RHEL 7, CentOS 7, Debian 8 and Ubuntu 14.04 LTS. (#17538 (https://github.com/bitcoin/bitcoin/pull/17538))
  
• The source code archives that are provided with gitian builds no longer contain
    any autotools artifacts. Therefore, to build from such source, a user
    should run the ./autogen.sh script from the root of the unpacked archive.
    This implies that autotools and other required packages are installed on the
    user's system. (#18331 (https://github.com/bitcoin/bitcoin/pull/18331))
  

New settings

• New rpcwhitelist and rpcwhitelistdefault configuration parameters
    allow giving certain RPC users permissions to only some RPC calls.
    (#12763 (https://github.com/bitcoin/bitcoin/pull/12763))
  
• A new -asmap configuration option has been added to diversify the
    node's network connections by mapping IP addresses Autonomous System
    Numbers (ASNs) and then limiting the number of connections made to any
    single ASN.  See issue  #16599 (https://github.com/bitcoin/bitcoin/issues/16599),
    PR #16702 (https://github.com/bitcoin/bitcoin/pull/16702), and the
    bitcoind help for more information.  This option is experimental and
    subject to removal or breaking changes in future releases, so the
    legacy /16 prefix mapping of IP addresses remains the default.  (#16702 (https://github.com/bitcoin/bitcoin/pull/16702))
  

Updated settings

• All custom settings configured when Bitcoin Core starts are now
    written to the debug.log file to assist troubleshooting.  (#16115 (https://github.com/bitcoin/bitcoin/pull/16115))
  
• Importing blocks upon startup via the bootstrap.dat file no longer
    occurs by default. The file must now be specified with
    -loadblock=<file>.  (#17044 (https://github.com/bitcoin/bitcoin/pull/17044))
  
• The -debug=db logging category has been renamed to
    -debug=walletdb to distinguish it from coindb.  The -debug=db
    option has been deprecated and will be removed in the next major
    release.  (#17410 (https://github.com/bitcoin/bitcoin/pull/17410))
  
• The -walletnotify configuration parameter will now replace any %w
    in its argument with the name of the wallet generating the
    notification.  This is not supported on Windows. (#13339 (https://github.com/bitcoin/bitcoin/pull/13339))
  

Removed settings

• The -whitelistforcerelay configuration parameter has been removed after
    it was discovered that it was rendered ineffective in version 0.13 and
    hasn't actually been supported for almost four years.  (#17985 (https://github.com/bitcoin/bitcoin/pull/17985))

GUI changes

• The "Start Bitcoin Core on system login" option has been removed on macOS.
    (#17567 (https://github.com/bitcoin/bitcoin/pull/17567))
  
• In the Peers window, the details for a peer now displays a Mapped AS
    field to indicate the mapped Autonomous System used for diversifying
    peer selection. See the -asmap configuration option in <em>New
    Settings</em>, above.  (#18402 (https://github.com/bitcoin/bitcoin/pull/18402))
  
• A "known bug" announced (https://bitcoincore.org/en/releases/0.18.0/#wallet-gui)
    in the release notes of version 0.18 has been fixed.  The issue
    affected anyone who simultaneously used multiple Bitcoin Core wallets
    and the GUI coin control feature. (#18894 (https://github.com/bitcoin/bitcoin/pull/18894))
  
• For watch-only wallets, creating a new transaction in the Send screen
    or fee bumping an existing transaction in the Transactions screen will
    automatically copy a Partially-Signed Bitcoin Transaction (PSBT) to
    the system clipboard.  This can then be pasted into an external
    program such as HWI (https://github.com/bitcoin-core/HWI) for
    signing.  Future versions of Bitcoin Core should support a GUI option
    for finalizing and broadcasting PSBTs, but for now the debug console
    may be used with the finalizepsbt and sendrawtransaction RPCs.
    (#16944 (https://github.com/bitcoin/bitcoin/pull/16944), #17492 (https://github.com/bitcoin/bitcoin/pull/17492))
  

Wallet

• The wallet now by default uses bech32 addresses when using RPC, and
    creates native segwit change outputs.  (#16884 (https://github.com/bitcoin/bitcoin/pull/16884))
  
• The way that output trust was computed has been fixed, which affects
    confirmed/unconfirmed balance status and coin selection.  (#16766 (https://github.com/bitcoin/bitcoin/pull/16766))
  
• The gettransaction, listtransactions and listsinceblock RPC
    responses now also include the height of the block that contains the
    wallet transaction, if any.  (#17437 (https://github.com/bitcoin/bitcoin/pull/17437))
  
• The getaddressinfo RPC has had its label field deprecated
    (re-enable for this release using the configuration parameter
    -deprecatedrpc=label).  The labels field is altered from returning
    JSON objects to returning a JSON array of label names (re-enable
    previous behavior for this release using the configuration parameter
    -deprecatedrpc=labelspurpose).  Backwards compatibility using the
    deprecated configuration parameters is expected to be dropped in the
    0.21 release.  (#17585 (https://github.com/bitcoin/bitcoin/pull/17585), #17578 (https://github.com/bitcoin/bitcoin/pull/17578))
  

Documentation changes

• Bitcoin Core's automatically-generated source code documentation is
    now available at https://doxygen.bitcoincore.org.  (#17596 (https://github.com/bitcoin/bitcoin/pull/17596))

Low-level changes

Utilities

• The bitcoin-cli utility used with the -getinfo parameter now
    returns a headers field with the number of downloaded block headers
    on the best headers chain (similar to the blocks field that is also
    returned) and a verificationprogress field that estimates how much
    of the best block chain has been synced by the local node.  The
    information returned no longer includes the protocolversion,
    walletversion, and keypoololdest fields.  (#17302 (https://github.com/bitcoin/bitcoin/pull/17302), #17650 (https://github.com/bitcoin/bitcoin/pull/17650))
  
• The bitcoin-cli utility now accepts a -stdinwalletpassphrase
    parameter that can be used when calling the walletpassphrase and
    walletpassphrasechange RPCs to read the passphrase from standard
    input without echoing it to the terminal, improving security against
    anyone who can look at your screen.  The existing -stdinrpcpass
    parameter is also updated to not echo the passphrase. (#13716 (https://github.com/bitcoin/bitcoin/pull/13716))
  

Command line

• Command line options prefixed with main/test/regtest network names like
    -main.port=8333 -test.server=1 previously were allowed but ignored. Now
    they trigger "Invalid parameter" errors on startup. (#17482 (https://github.com/bitcoin/bitcoin/pull/17482))

New RPCs

• The dumptxoutset RPC outputs a serialized snapshot of the current
    UTXO set.  A script is provided in the contrib/devtools directory
    for generating a snapshot of the UTXO set at a particular block
    height.  (#16899 (https://github.com/bitcoin/bitcoin/pull/16899))
  
• The generatetodescriptor RPC allows testers using regtest mode to
    generate blocks that pay an arbitrary output script descriptor.
    (#16943 (https://github.com/bitcoin/bitcoin/pull/16943))
  

Updated RPCs

• The verifychain RPC default values are now static instead of
    depending on the command line options or configuration file
    (-checklevel, and -checkblocks). Users can pass in the RPC
    arguments explicitly when they don't want to rely on the default
    values. (#18541 (https://github.com/bitcoin/bitcoin/pull/18541))
  
• The getblockchaininfo RPC's verificationprogress field will no
    longer report values higher than 1.  Previously it would occasionally
    report the chain was more than 100% verified.  (#17328 (https://github.com/bitcoin/bitcoin/pull/17328))
  

Tests

• It is now an error to use an unqualified walletdir=path setting in
    the config file if running on testnet or regtest networks. The setting
    now needs to be qualified as chain.walletdir=path or placed in the
    appropriate [chain] section. (#17447 (https://github.com/bitcoin/bitcoin/pull/17447))
  
• -fallbackfee was 0 (disabled) by default for the main chain, but
    0.0002 by default for the test chains. Now it is 0 by default for all
    chains. Testnet and regtest users will have to add
    fallbackfee=0.0002 to their configuration if they weren't setting it
    and they want it to keep working like before. (#16524 (https://github.com/bitcoin/bitcoin/pull/16524))
  

Build system

• Support is provided for building with the Android Native Development
    Kit (NDK).  (#16110 (https://github.com/bitcoin/bitcoin/pull/16110))

---

Tests and QA

• #12134 (https://github.com/bitcoin/bitcoin/pull/12134) Build previous releases and run functional tests (Sjors)
• #13693 (https://github.com/bitcoin/bitcoin/pull/13693) Add coverage to estimaterawfee and estimatesmartfee (Empact)
• #13728 (https://github.com/bitcoin/bitcoin/pull/13728) lint: Run the ci lint stage on mac (Empact)
• #15443 (https://github.com/bitcoin/bitcoin/pull/15443) Add getdescriptorinfo functional test (promag)
• #15888 (https://github.com/bitcoin/bitcoin/pull/15888) Add wallet_implicitsegwit to test the ability to transform keys between address types (luke-jr)
• #16540 (https://github.com/bitcoin/bitcoin/pull/16540) Add ASSERT_DEBUG_LOG to unit test framework (MarcoFalke)
• #16597 (https://github.com/bitcoin/bitcoin/pull/16597) travis: Run full test suite on native macos (Sjors)
• #16681 (https://github.com/bitcoin/bitcoin/pull/16681) Use self.chain instead of 'regtest' in all current tests (jtimon)
• #16786 (https://github.com/bitcoin/bitcoin/pull/16786) add unit test for wallet watch-only methods involving PubKeys (theStack)
• #16943 (https://github.com/bitcoin/bitcoin/pull/16943) Add generatetodescriptor RPC (MarcoFalke)
• #16973 (https://github.com/bitcoin/bitcoin/pull/16973) Fix combine_logs.py for AppVeyor build (mzumsande)
• #16975 (https://github.com/bitcoin/bitcoin/pull/16975) Show debug log on unit test failure (MarcoFalke)
• #16978 (https://github.com/bitcoin/bitcoin/pull/16978) Seed test RNG context for each test case, print seed (MarcoFalke)
• #17009 (https://github.com/bitcoin/bitcoin/pull/17009), #17018 (https://github.com/bitcoin/bitcoin/pull/17018), #17050 (https://github.com/bitcoin/bitcoin/pull/17050), #17051 (https://github.com/bitcoin/bitcoin/pull/17051), #17071 (https://github.com/bitcoin/bitcoin/pull/17071), #17076 (https://github.com/bitcoin/bitcoin/pull/17076), #17083 (https://github.com/bitcoin/bitcoin/pull/17083), #17093 (https://github.com/bitcoin/bitcoin/pull/17093), #17109 (https://github.com/bitcoin/bitcoin/pull/17109), #17113 (https://github.com/bitcoin/bitcoin/pull/17113), #17136 (https://github.com/bitcoin/bitcoin/pull/17136), #17229 (https://github.com/bitcoin/bitcoin/pull/17229), #17291 (https://github.com/bitcoin/bitcoin/pull/17291), #17357 (https://github.com/bitcoin/bitcoin/pull/17357), #17771 (https://github.com/bitcoin/bitcoin/pull/17771), #17777 (https://github.com/bitcoin/bitcoin/pull/17777), #17917 (https://github.com/bitcoin/bitcoin/pull/17917), #17926 (https://github.com/bitcoin/bitcoin/pull/17926), #17972 (https://github.com/bitcoin/bitcoin/pull/17972), #17989 (https://github.com/bitcoin/bitcoin/pull/17989), #17996 (https://github.com/bitcoin/bitcoin/pull/17996), #18009 (https://github.com/bitcoin/bitcoin/pull/18009), #18029 (https://github.com/bitcoin/bitcoin/pull/18029), #18047 (https://github.com/bitcoin/bitcoin/pull/18047), #18126 (https://github.com/bitcoin/bitcoin/pull/18126), #18176 (https://github.com/bitcoin/bitcoin/pull/18176), #18206 (https://github.com/bitcoin/bitcoin/pull/18206), #18353 (https://github.com/bitcoin/bitcoin/pull/18353), #18363 (https://github.com/bitcoin/bitcoin/pull/18363), #18407 (https://github.com/bitcoin/bitcoin/pull/18407), #18417 (https://github.com/bitcoin/bitcoin/pull/18417), #18423 (https://github.com/bitcoin/bitcoin/pull/18423), #18445 (https://github.com/bitcoin/bitcoin/pull/18445), #18455 (https://github.com/bitcoin/bitcoin/pull/18455), #18565 (https://github.com/bitcoin/bitcoin/pull/18565) Add fuzzing harnesses (practicalswift)
• #17011 (https://github.com/bitcoin/bitcoin/pull/17011) ci: Use busybox utils for one build (MarcoFalke)
• #17030 (https://github.com/bitcoin/bitcoin/pull/17030) Fix Python Docstring to include all Args (jbampton)
• #17041 (https://github.com/bitcoin/bitcoin/pull/17041) ci: Run tests on arm (MarcoFalke)
• #17069 (https://github.com/bitcoin/bitcoin/pull/17069) Pass fuzzing inputs as constant references (practicalswift)
• #17091 (https://github.com/bitcoin/bitcoin/pull/17091) Add test for loadblock option and linearize scripts (fjahr)
• #17108 (https://github.com/bitcoin/bitcoin/pull/17108) fix "tx-size-small" errors after default address change (theStack)
• #17121 (https://github.com/bitcoin/bitcoin/pull/17121) Speed up wallet_backup by whitelisting peers (immediate tx relay) (theStack)
• #17124 (https://github.com/bitcoin/bitcoin/pull/17124) Speed up wallet_address_types by whitelisting peers (immediate tx relay) (theStack)
• #17140 (https://github.com/bitcoin/bitcoin/pull/17140) Fix bug in blockfilter_index_tests (jimpo)
• #17199 (https://github.com/bitcoin/bitcoin/pull/17199) use default address type (bech32) for wallet_bumpfee tests (theStack)
• #17205 (https://github.com/bitcoin/bitcoin/pull/17205) ci: Enable address sanitizer (asan) stack-use-after-return checking (practicalswift)
• #17206 (https://github.com/bitcoin/bitcoin/pull/17206) Add testcase to simulate bitcoin schema in leveldb (adamjonas)
• #17209 (https://github.com/bitcoin/bitcoin/pull/17209) Remove no longer needed UBSan suppressions (issues fixed). Add documentation (practicalswift)
• #17220 (https://github.com/bitcoin/bitcoin/pull/17220) Add unit testing for the CompressScript function (adamjonas)
• #17225 (https://github.com/bitcoin/bitcoin/pull/17225) Test serialisation as part of deserialisation fuzzing. Test round-trip equality where possible (practicalswift)
• #17228 (https://github.com/bitcoin/bitcoin/pull/17228) Add RegTestingSetup to setup_common (MarcoFalke)
• #17233 (https://github.com/bitcoin/bitcoin/pull/17233) travis: Run unit and functional tests on native arm (MarcoFalke)
• #17235 (https://github.com/bitcoin/bitcoin/pull/17235) Skip unnecessary fuzzer initialisation. Hold ECCVerifyHandle only when needed (practicalswift)
• #17240 (https://github.com/bitcoin/bitcoin/pull/17240) ci: Disable functional tests on mac host (MarcoFalke)
• #17254 (https://github.com/bitcoin/bitcoin/pull/17254) Fix script_p2sh_tests OP_PUSHBACK2/4 missing (adamjonas)
• #17267 (https://github.com/bitcoin/bitcoin/pull/17267) bench: Fix negative values and zero for -evals flag (nijynot)
• #17275 (https://github.com/bitcoin/bitcoin/pull/17275) pubkey: Assert CPubKey's ECCVerifyHandle precondition (practicalswift)
• #17288 (https://github.com/bitcoin/bitcoin/pull/17288) Added TestWrapper class for interactive Python environments (jachiang)
• #17292 (https://github.com/bitcoin/bitcoin/pull/17292) Add new mempool benchmarks for a complex pool (JeremyRubin)
• #17299 (https://github.com/bitcoin/bitcoin/pull/17299) add reason checks for non-standard txs in test_IsStandard (theStack)
• #17322 (https://github.com/bitcoin/bitcoin/pull/17322) Fix input size assertion in wallet_bumpfee.py (instagibbs)
• #17327 (https://github.com/bitcoin/bitcoin/pull/17327) Add rpc_fundrawtransaction logging (jonatack)
• #17330 (https://github.com/bitcoin/bitcoin/pull/17330) Add shrinkdebugfile=0 to regtest bitcoin.conf (sdaftuar)
• #17340 (https://github.com/bitcoin/bitcoin/pull/17340) Speed up fundrawtransaction test (jnewbery)
• #17345 (https://github.com/bitcoin/bitcoin/pull/17345) Do not instantiate CAddrDB for static call CAddrDB::Read() (hebasto)
• #17362 (https://github.com/bitcoin/bitcoin/pull/17362) Speed up wallet_avoidreuse, add logging (jonatack)
• #17363 (https://github.com/bitcoin/bitcoin/pull/17363) add "diamond" unit test to MempoolAncestryTests (theStack)
• #17366 (https://github.com/bitcoin/bitcoin/pull/17366) Reset global args between test suites (MarcoFalke)
• #17367 (https://github.com/bitcoin/bitcoin/pull/17367) ci: Run non-cross-compile builds natively (MarcoFalke)
• #17378 (https://github.com/bitcoin/bitcoin/pull/17378) TestShell: Fix typos &amp; implement cleanups (jachiang)
• #17384 (https://github.com/bitcoin/bitcoin/pull/17384) Create new test library (MarcoFalke)
• #17387 (https://github.com/bitcoin/bitcoin/pull/17387) wallet_importmulti: use addresses of the same type as being imported (achow101)
• #17388 (https://github.com/bitcoin/bitcoin/pull/17388) Add missing newline in util_ChainMerge test (ryanofsky)
• #17390 (https://github.com/bitcoin/bitcoin/pull/17390) Add util_ArgParsing test (ryanofsky)
• #17420 (https://github.com/bitcoin/bitcoin/pull/17420) travis: Rework cache_err_msg (MarcoFalke)
• #17423 (https://github.com/bitcoin/bitcoin/pull/17423) ci: Make ci system read-only on the git work tree (MarcoFalke)
• #17435 (https://github.com/bitcoin/bitcoin/pull/17435) check custom ancestor limit in mempool_packages.py (theStack)
• #17455 (https://github.com/bitcoin/bitcoin/pull/17455) Update valgrind suppressions (practicalswift)
• #17461 (https://github.com/bitcoin/bitcoin/pull/17461) Check custom descendant limit in mempool_packages.py (theStack)
• #17469 (https://github.com/bitcoin/bitcoin/pull/17469) Remove fragile assert_memory_usage_stable (MarcoFalke)
• #17470 (https://github.com/bitcoin/bitcoin/pull/17470) ci: Use clang-8 for fuzzing to run on aarch64 ci systems (MarcoFalke)
• #17480 (https://github.com/bitcoin/bitcoin/pull/17480) Add unit test for non-standard txs with too large scriptSig (theStack)
• #17497 (https://github.com/bitcoin/bitcoin/pull/17497) Skip tests when utils haven't been compiled (fanquake)
• #17502 (https://github.com/bitcoin/bitcoin/pull/17502) Add unit test for non-standard bare multisig txs (theStack)
• #17511 (https://github.com/bitcoin/bitcoin/pull/17511) Add bounds checks before base58 decoding (sipa)
• #17517 (https://github.com/bitcoin/bitcoin/pull/17517) ci: Bump to clang-8 for asan build to avoid segfaults on ppc64le (MarcoFalke)
• #17522 (https://github.com/bitcoin/bitcoin/pull/17522) Wait until mempool is loaded in wallet_abandonconflict (MarcoFalke)
• #17532 (https://github.com/bitcoin/bitcoin/pull/17532) Add functional test for non-standard txs with too large scriptSig (theStack)
• #17541 (https://github.com/bitcoin/bitcoin/pull/17541) Add functional test for non-standard bare multisig txs (theStack)
• #17555 (https://github.com/bitcoin/bitcoin/pull/17555) Add unit test for non-standard txs with wrong nVersion (dspicher)
• #17571 (https://github.com/bitcoin/bitcoin/pull/17571) Add libtest_util library to msvc build configuration (sipsorcery)
• #17591 (https://github.com/bitcoin/bitcoin/pull/17591) ci: Add big endian platform - s390x (elichai)
• #17593 (https://github.com/bitcoin/bitcoin/pull/17593) Move more utility functions into test utility library (mzumsande)
• #17633 (https://github.com/bitcoin/bitcoin/pull/17633) Add option --valgrind to run the functional tests under Valgrind (practicalswift)
• #17635 (https://github.com/bitcoin/bitcoin/pull/17635) ci: Add centos 7 build (hebasto)
• #17641 (https://github.com/bitcoin/bitcoin/pull/17641) Add unit test for leveldb creation with unicode path (sipsorcery)
• #17674 (https://github.com/bitcoin/bitcoin/pull/17674) Add initialization order fiasco detection in Travis (practicalswift)
• #17675 (https://github.com/bitcoin/bitcoin/pull/17675) Enable tests which are incorrectly skipped when running test_runner.py --usecli (practicalswift)
• #17685 (https://github.com/bitcoin/bitcoin/pull/17685) Fix bug in the descriptor parsing fuzzing harness (descriptor_parse) (practicalswift)
• #17705 (https://github.com/bitcoin/bitcoin/pull/17705) re-enable CLI test support by using EncodeDecimal in json.dumps() (fanquake)
• #17720 (https://github.com/bitcoin/bitcoin/pull/17720) add unit test for non-standard "scriptsig-not-pushonly" txs (theStack)
• #17767 (https://github.com/bitcoin/bitcoin/pull/17767) ci: Fix qemu issues (MarcoFalke)
• #17793 (https://github.com/bitcoin/bitcoin/pull/17793) ci: Update github actions ci vcpkg cache on msbuild update (hebasto)
• #17806 (https://github.com/bitcoin/bitcoin/pull/17806) Change filemode of rpc_whitelist.py (emilengler)
• #17849 (https://github.com/bitcoin/bitcoin/pull/17849) ci: Fix brew python link (hebasto)
• #17851 (https://github.com/bitcoin/bitcoin/pull/17851) Add std::to_string to list of locale dependent functions (practicalswift)
• #17893 (https://github.com/bitcoin/bitcoin/pull/17893) Fix double-negative arg test (hebasto)
• #17900 (https://github.com/bitcoin/bitcoin/pull/17900) ci: Combine 32-bit build with centos 7 build (theStack)
• #17921 (https://github.com/bitcoin/bitcoin/pull/17921) Test OP_CSV empty stack fail in feature_csv_activation.py (theStack)
• #17931 (https://github.com/bitcoin/bitcoin/pull/17931) Fix p2p_invalid_messages failing in Python 3.8 because of warning (elichai)
• #17947 (https://github.com/bitcoin/bitcoin/pull/17947) add unit test for non-standard txs with too large tx size (theStack)
• #17959 (https://github.com/bitcoin/bitcoin/pull/17959) Check specific reject reasons in feature_csv_activation.py (theStack)
• #17984 (https://github.com/bitcoin/bitcoin/pull/17984) Add p2p test for forcerelay permission (MarcoFalke)
• #18001 (https://github.com/bitcoin/bitcoin/pull/18001) Updated appveyor job to checkout a specific vcpkg commit ID (sipsorcery)
• #18008 (https://github.com/bitcoin/bitcoin/pull/18008) fix fuzzing using libFuzzer on macOS (fanquake)
• #18013 (https://github.com/bitcoin/bitcoin/pull/18013) bench: Fix benchmarks filters (elichai)
• #18018 (https://github.com/bitcoin/bitcoin/pull/18018) reset fIsBareMultisigStd after bare-multisig tests (fanquake)
• #18022 (https://github.com/bitcoin/bitcoin/pull/18022) Fix appveyor test_bitcoin build of *.raw (MarcoFalke)
• #18037 (https://github.com/bitcoin/bitcoin/pull/18037) util: Allow scheduler to be mocked (amitiuttarwar)
• #18056 (https://github.com/bitcoin/bitcoin/pull/18056) ci: Check for submodules (emilengler)
• #18069 (https://github.com/bitcoin/bitcoin/pull/18069) Replace 'regtest' leftovers by self.chain (theStack)
• #18081 (https://github.com/bitcoin/bitcoin/pull/18081) Set a name for CI Docker containers (fanquake)
• #18109 (https://github.com/bitcoin/bitcoin/pull/18109) Avoid hitting some known minor tinyformat issues when fuzzing strprintf(…) (practicalswift)
• #18155 (https://github.com/bitcoin/bitcoin/pull/18155) Add harness which fuzzes EvalScript and VerifyScript using a fuzzed signature checker (practicalswift)
• #18159 (https://github.com/bitcoin/bitcoin/pull/18159) Add --valgrind option to test/fuzz/test_runner.py for running fuzzing test cases under valgrind (practicalswift)
• #18166 (https://github.com/bitcoin/bitcoin/pull/18166) ci: Run fuzz testing test cases (bitcoin-core/qa-assets) under valgrind to catch memory errors (practicalswift)
• #18172 (https://github.com/bitcoin/bitcoin/pull/18172) Transaction expiry from mempool (0xB10C)
• #18181 (https://github.com/bitcoin/bitcoin/pull/18181) Remove incorrect assumptions in validation_flush_tests (MarcoFalke)
• #18183 (https://github.com/bitcoin/bitcoin/pull/18183) Set catch_system_errors=no on boost unit tests (MarcoFalke)
• #18195 (https://github.com/bitcoin/bitcoin/pull/18195) Add cost_of_change parameter assertions to bnb_search_test (yancyribbens)
• #18209 (https://github.com/bitcoin/bitcoin/pull/18209) Reduce unneeded whitelist permissions in tests (MarcoFalke)
• #18211 (https://github.com/bitcoin/bitcoin/pull/18211) Disable mockforward scheduler unit test for now (MarcoFalke)
• #18213 (https://github.com/bitcoin/bitcoin/pull/18213) Fix race in p2p_segwit (MarcoFalke)
• #18224 (https://github.com/bitcoin/bitcoin/pull/18224) Make AnalyzePSBT next role calculation simple, correct (instagibbs)
• #18228 (https://github.com/bitcoin/bitcoin/pull/18228) Add missing syncwithvalidationinterfacequeue (MarcoFalke)
• #18247 (https://github.com/bitcoin/bitcoin/pull/18247) Wait for both veracks in add_p2p_connection (MarcoFalke)
• #18249 (https://github.com/bitcoin/bitcoin/pull/18249) Bump timeouts to accomodate really slow disks (MarcoFalke)
• #18255 (https://github.com/bitcoin/bitcoin/pull/18255) Add bad-txns-*-toolarge test cases to invalid_txs (MarcoFalke)
• #18263 (https://github.com/bitcoin/bitcoin/pull/18263) rpc: change setmocktime check to use IsMockableChain (gzhao408)
• #18285 (https://github.com/bitcoin/bitcoin/pull/18285) Check that wait_until returns if time point is in the past (MarcoFalke)
• #18286 (https://github.com/bitcoin/bitcoin/pull/18286) Add locale fuzzer to FUZZERS_MISSING_CORPORA (practicalswift)
• #18292 (https://github.com/bitcoin/bitcoin/pull/18292) fuzz: Add assert(script == decompressed_script) (MarcoFalke)
• #18299 (https://github.com/bitcoin/bitcoin/pull/18299) Update FUZZERS_MISSING_CORPORA to enable regression fuzzing for all harnesses in master (practicalswift)
• #18300 (https://github.com/bitcoin/bitcoin/pull/18300) fuzz: Add option to merge input dir to test runner (MarcoFalke)
• #18305 (https://github.com/bitcoin/bitcoin/pull/18305) Explain why test logging should be used (MarcoFalke)
• #18306 (https://github.com/bitcoin/bitcoin/pull/18306) Add logging to wallet_listsinceblock.py (jonatack)
• #18311 (https://github.com/bitcoin/bitcoin/pull/18311) Bumpfee test fix (instagibbs)
• #18314 (https://github.com/bitcoin/bitcoin/pull/18314) Add deserialization fuzzing of SnapshotMetadata (utxo_snapshot) (practicalswift)
• #18319 (https://github.com/bitcoin/bitcoin/pull/18319) fuzz: Add missing ECC_Start to key_io test (MarcoFalke)
• #18334 (https://github.com/bitcoin/bitcoin/pull/18334) Add basic test for BIP 37 (MarcoFalke)
• #18350 (https://github.com/bitcoin/bitcoin/pull/18350) Fix mining to an invalid target + ensure that a new block has the correct hash internally (TheQuantumPhysicist)
• #18378 (https://github.com/bitcoin/bitcoin/pull/18378) Bugfix &amp; simplify bn2vch using int.to_bytes (sipa)
• #18393 (https://github.com/bitcoin/bitcoin/pull/18393) Don't assume presence of __builtin_mul_overflow(…) in MultiplicationOverflow(…) fuzzing harness (practicalswift)
• #18406 (https://github.com/bitcoin/bitcoin/pull/18406) add executable flag for rpc_estimatefee.py (theStack)
• #18420 (https://github.com/bitcoin/bitcoin/pull/18420) listsinceblock block height checks (jonatack)
• #18430 (https://github.com/bitcoin/bitcoin/pull/18430) ci: Only clone bitcoin-core/qa-assets when fuzzing (MarcoFalke)
• #18438 (https://github.com/bitcoin/bitcoin/pull/18438) ci: Use homebrew addon on native macos (hebasto)
• #18447 (https://github.com/bitcoin/bitcoin/pull/18447) Add coverage for script parse error in ParseScript (pierreN)
• #18472 (https://github.com/bitcoin/bitcoin/pull/18472) Remove unsafe BOOST_TEST_MESSAGE (MarcoFalke)
• #18474 (https://github.com/bitcoin/bitcoin/pull/18474) check that peer is connected when calling sync_* (MarcoFalke)
• #18477 (https://github.com/bitcoin/bitcoin/pull/18477) ci: Use focal for fuzzers (MarcoFalke)
• #18481 (https://github.com/bitcoin/bitcoin/pull/18481) add BIP37 'filterclear' test to p2p_filter.py (theStack)
• #18496 (https://github.com/bitcoin/bitcoin/pull/18496) Remove redundant sync_with_ping after add_p2p_connection (jonatack)
• #18509 (https://github.com/bitcoin/bitcoin/pull/18509) fuzz: Avoid running over all inputs after merging them (MarcoFalke)
• #18510 (https://github.com/bitcoin/bitcoin/pull/18510) fuzz: Add CScriptNum::getint coverage (MarcoFalke)
• #18514 (https://github.com/bitcoin/bitcoin/pull/18514) remove rapidcheck integration and tests (fanquake)
• #18515 (https://github.com/bitcoin/bitcoin/pull/18515) Add BIP37 remote crash bug [CVE-2013-5700] test to p2p_filter.py (theStack)
• #18516 (https://github.com/bitcoin/bitcoin/pull/18516) relax bumpfee dust_to_fee txsize an extra vbyte (jonatack)
• #18518 (https://github.com/bitcoin/bitcoin/pull/18518) fuzz: Extend descriptor fuzz test (MarcoFalke)
• #18519 (https://github.com/bitcoin/bitcoin/pull/18519) fuzz: Extend script fuzz test (MarcoFalke)
• #18521 (https://github.com/bitcoin/bitcoin/pull/18521) fuzz: Add process_messages harness (MarcoFalke)
• #18529 (https://github.com/bitcoin/bitcoin/pull/18529) Add fuzzer version of randomized prevector test (sipa)
• #18534 (https://github.com/bitcoin/bitcoin/pull/18534) skip backwards compat tests if not compiled with wallet (fanquake)
• #18540 (https://github.com/bitcoin/bitcoin/pull/18540) wallet_bumpfee assertion fixup (jonatack)
• #18543 (https://github.com/bitcoin/bitcoin/pull/18543) Use one node to avoid a race due to missing sync in rpc_signrawtransaction (MarcoFalke)
• #18561 (https://github.com/bitcoin/bitcoin/pull/18561) Properly raise FailedToStartError when rpc shutdown before warmup finished (MarcoFalke)
• #18562 (https://github.com/bitcoin/bitcoin/pull/18562) ci: Run unit tests sequential once (MarcoFalke)
• #18563 (https://github.com/bitcoin/bitcoin/pull/18563) Fix unregister_all_during_call cleanup (ryanofsky)
• #18566 (https://github.com/bitcoin/bitcoin/pull/18566) Set -use_value_profile=1 when merging fuzz inputs (MarcoFalke)
• #18757 (https://github.com/bitcoin/bitcoin/pull/18757) Remove enumeration of expected deserialization exceptions in ProcessMessage(…) fuzzer (practicalswift)
• #18878 (https://github.com/bitcoin/bitcoin/pull/18878) Add test for conflicted wallet tx notifications (ryanofsky)
• #18975 (https://github.com/bitcoin/bitcoin/pull/18975) Remove const to work around compiler error on xenial (laanwj)

Documentation

• #16947 (https://github.com/bitcoin/bitcoin/pull/16947) Doxygen-friendly script/descriptor.h comments (ch4ot1c)
• #16983 (https://github.com/bitcoin/bitcoin/pull/16983) Add detailed info about Bitcoin Core files (hebasto)
• #16986 (https://github.com/bitcoin/bitcoin/pull/16986) Doxygen-friendly CuckooCache comments (ch4ot1c)
• #17022 (https://github.com/bitcoin/bitcoin/pull/17022) move-only: Steps for "before major release branch-off" (MarcoFalke)
• #17026 (https://github.com/bitcoin/bitcoin/pull/17026) Update bips.md for default bech32 addresses in 0.20.0 (MarcoFalke)
• #17081 (https://github.com/bitcoin/bitcoin/pull/17081) Fix Makefile target in benchmarking.md (theStack)
• #17102 (https://github.com/bitcoin/bitcoin/pull/17102) Add missing indexes/blockfilter/basic to doc/files.md (MarcoFalke)
• #17119 (https://github.com/bitcoin/bitcoin/pull/17119) Fix broken bitcoin-cli examples (andrewtoth)
• #17134 (https://github.com/bitcoin/bitcoin/pull/17134) Add switch on enum example to developer notes (hebasto)
• #17142 (https://github.com/bitcoin/bitcoin/pull/17142) Update macdeploy README to include all files produced by make deploy (za-kk)
• #17146 (https://github.com/bitcoin/bitcoin/pull/17146) github: Add warning for bug reports (laanwj)
• #17157 (https://github.com/bitcoin/bitcoin/pull/17157) Added instructions for how to add an upsteam to forked repo (dannmat)
• #17159 (https://github.com/bitcoin/bitcoin/pull/17159) Add a note about backporting (carnhofdaki)
• #17169 (https://github.com/bitcoin/bitcoin/pull/17169) Correct function name in ReportHardwareRand() (fanquake)
• #17177 (https://github.com/bitcoin/bitcoin/pull/17177) Describe log files + consistent paths in test READMEs (fjahr)
• #17239 (https://github.com/bitcoin/bitcoin/pull/17239) Changed miniupnp links to https (sandakersmann)
• #17281 (https://github.com/bitcoin/bitcoin/pull/17281) Add developer note on c_str() (laanwj)
• #17285 (https://github.com/bitcoin/bitcoin/pull/17285) Bip70 removal follow-up (fjahr)
• #17286 (https://github.com/bitcoin/bitcoin/pull/17286) Fix help-debug -checkpoints (ariard)
• #17309 (https://github.com/bitcoin/bitcoin/pull/17309) update MSVC instructions to remove Qt OpenSSL linking (fanquake)
• #17339 (https://github.com/bitcoin/bitcoin/pull/17339) Add template for good first issues (michaelfolkson)
• #17351 (https://github.com/bitcoin/bitcoin/pull/17351) Fix some misspellings (RandyMcMillan)
• #17353 (https://github.com/bitcoin/bitcoin/pull/17353) Add ShellCheck to lint tests dependencies (hebasto)
• #17370 (https://github.com/bitcoin/bitcoin/pull/17370) Update doc/bips.md with recent changes in master (MarcoFalke)
• #17393 (https://github.com/bitcoin/bitcoin/pull/17393) Added regtest config for linearize script (gr0kchain)
• #17411 (https://github.com/bitcoin/bitcoin/pull/17411) Add some better examples for scripted diff (laanwj)
• #17503 (https://github.com/bitcoin/bitcoin/pull/17503) Remove bitness from bitcoin-qt help message and manpage (laanwj)
• #17539 (https://github.com/bitcoin/bitcoin/pull/17539) Update and improve Developer Notes (hebasto)
• #17561 (https://github.com/bitcoin/bitcoin/pull/17561) Changed MiniUPnPc link to https in dependencies.md (sandakersmann)
• #17596 (https://github.com/bitcoin/bitcoin/pull/17596) Change doxygen URL to doxygen.bitcoincore.org (laanwj)
• #17598 (https://github.com/bitcoin/bitcoin/pull/17598) Update release process with latest changes (MarcoFalke)
• #17617 (https://github.com/bitcoin/bitcoin/pull/17617) Unify unix epoch time descriptions (jonatack)
• #17637 (https://github.com/bitcoin/bitcoin/pull/17637) script: Add keyserver to verify-commits readme (emilengler)
• #17648 (https://github.com/bitcoin/bitcoin/pull/17648) Rename wallet-tool references to bitcoin-wallet (hel-o)
• #17688 (https://github.com/bitcoin/bitcoin/pull/17688) Add "ci" prefix to CONTRIBUTING.md (hebasto)
• #17751 (https://github.com/bitcoin/bitcoin/pull/17751) Use recommended shebang approach in documentation code block (hackerrdave)
• #17752 (https://github.com/bitcoin/bitcoin/pull/17752) Fix directory path for secp256k1 subtree in developer-notes (hackerrdave)
• #17772 (https://github.com/bitcoin/bitcoin/pull/17772) Mention PR Club in CONTRIBUTING.md (emilengler)
• #17804 (https://github.com/bitcoin/bitcoin/pull/17804) Misc RPC help fixes (MarcoFalke)
• #17819 (https://github.com/bitcoin/bitcoin/pull/17819) Developer notes guideline on RPCExamples addresses (jonatack)
• #17825 (https://github.com/bitcoin/bitcoin/pull/17825) Update dependencies.md (hebasto)
• #17873 (https://github.com/bitcoin/bitcoin/pull/17873) Add to Doxygen documentation guidelines (jonatack)
• #17907 (https://github.com/bitcoin/bitcoin/pull/17907) Fix improper Doxygen inline comments (Empact)
• #17942 (https://github.com/bitcoin/bitcoin/pull/17942) Improve fuzzing docs for macOS users (fjahr)
• #17945 (https://github.com/bitcoin/bitcoin/pull/17945) Fix doxygen errors (Empact)
• #18025 (https://github.com/bitcoin/bitcoin/pull/18025) Add missing supported rpcs to doc/descriptors.md (andrewtoth)
• #18070 (https://github.com/bitcoin/bitcoin/pull/18070) Add note about brew doctor (givanse)
• #18125 (https://github.com/bitcoin/bitcoin/pull/18125) Remove PPA note from release-process.md (fanquake)
• #18170 (https://github.com/bitcoin/bitcoin/pull/18170) Minor grammatical changes and flow improvements (travinkeith)
• #18212 (https://github.com/bitcoin/bitcoin/pull/18212) Add missing step in win deployment instructions (dangershony)
• #18219 (https://github.com/bitcoin/bitcoin/pull/18219) Add warning against wallet.dat re-use (corollari)
• #18253 (https://github.com/bitcoin/bitcoin/pull/18253) Correct spelling errors in comments (Empact)
• #18278 (https://github.com/bitcoin/bitcoin/pull/18278) interfaces: Describe and follow some code conventions (ryanofsky)
• #18283 (https://github.com/bitcoin/bitcoin/pull/18283) Explain rebase policy in CONTRIBUTING.md (MarcoFalke)
• #18340 (https://github.com/bitcoin/bitcoin/pull/18340) Mention MAKE=gmake workaround when building on a BSD (fanquake)
• #18341 (https://github.com/bitcoin/bitcoin/pull/18341) Replace remaining literal BTC with CURRENCY_UNIT (domob1812)
• #18342 (https://github.com/bitcoin/bitcoin/pull/18342) Add fuzzing quickstart guides for libFuzzer and afl-fuzz (practicalswift)
• #18344 (https://github.com/bitcoin/bitcoin/pull/18344) Fix nit in getblockchaininfo (stevenroose)
• #18379 (https://github.com/bitcoin/bitcoin/pull/18379) Comment fix merkle.cpp (4d55397500)
• #18382 (https://github.com/bitcoin/bitcoin/pull/18382) note the costs of fetching all pull requests (vasild)
• #18391 (https://github.com/bitcoin/bitcoin/pull/18391) Update init and reduce-traffic docs for -blocksonly (glowang)
• #18464 (https://github.com/bitcoin/bitcoin/pull/18464) Block-relay-only vs blocksonly (MarcoFalke)
• #18486 (https://github.com/bitcoin/bitcoin/pull/18486) Explain new test logging (MarcoFalke)
• #18505 (https://github.com/bitcoin/bitcoin/pull/18505) Update webchat URLs in README.md (SuriyaaKudoIsc)
• #18513 (https://github.com/bitcoin/bitcoin/pull/18513) Fix git add argument (HashUnlimited)
• #18577 (https://github.com/bitcoin/bitcoin/pull/18577) Correct scripted-diff example link (yahiheb)
• #18589 (https://github.com/bitcoin/bitcoin/pull/18589) Fix naming of macOS SDK and clarify version (achow101)

Miscellaneous

• #15600 (https://github.com/bitcoin/bitcoin/pull/15600) lockedpool: When possible, use madvise to avoid including sensitive information in core dumps (luke-jr)
• #15934 (https://github.com/bitcoin/bitcoin/pull/15934) Merge settings one place instead of five places (ryanofsky)
• #16115 (https://github.com/bitcoin/bitcoin/pull/16115) On bitcoind startup, write config args to debug.log (LarryRuane)
• #16117 (https://github.com/bitcoin/bitcoin/pull/16117) util: Replace boost sleep with std sleep (MarcoFalke)
• #16161 (https://github.com/bitcoin/bitcoin/pull/16161) util: Fix compilation errors in support/lockedpool.cpp (jkczyz)
• #16802 (https://github.com/bitcoin/bitcoin/pull/16802) scripts: In linearize, search for next position of magic bytes rather than fail (takinbo)
• #16889 (https://github.com/bitcoin/bitcoin/pull/16889) Add some general std::vector utility functions (sipa)
• #17049 (https://github.com/bitcoin/bitcoin/pull/17049) contrib: Bump gitian descriptors for 0.20 (MarcoFalke)
• #17052 (https://github.com/bitcoin/bitcoin/pull/17052) scripts: Update copyright_header script to include additional files (GChuf)
• #17059 (https://github.com/bitcoin/bitcoin/pull/17059) util: Simplify path argument for cblocktreedb ctor (hebasto)
• #17191 (https://github.com/bitcoin/bitcoin/pull/17191) random: Remove call to RAND_screen() (Windows only) (fanquake)
• #17192 (https://github.com/bitcoin/bitcoin/pull/17192) util: Add check_nonfatal and use it in src/rpc (MarcoFalke)
• #17218 (https://github.com/bitcoin/bitcoin/pull/17218) Replace the LogPrint function with a macro (jkczyz)
• #17266 (https://github.com/bitcoin/bitcoin/pull/17266) util: Rename decodedumptime to parseiso8601datetime (elichai)
• #17270 (https://github.com/bitcoin/bitcoin/pull/17270) Feed environment data into RNG initializers (sipa)
• #17282 (https://github.com/bitcoin/bitcoin/pull/17282) contrib: Remove accounts from bash completion (fanquake)
• #17293 (https://github.com/bitcoin/bitcoin/pull/17293) Add assertion to randrange that input is not 0 (JeremyRubin)
• #17325 (https://github.com/bitcoin/bitcoin/pull/17325) log: Fix log message for -par=1 (hebasto)
• #17329 (https://github.com/bitcoin/bitcoin/pull/17329) linter: Strip trailing / in path for git-subtree-check (jnewbery)
• #17336 (https://github.com/bitcoin/bitcoin/pull/17336) scripts: Search for first block file for linearize-data with some block files pruned (Rjected)
• #17361 (https://github.com/bitcoin/bitcoin/pull/17361) scripts: Lint gitian descriptors with shellcheck (hebasto)
• #17482 (https://github.com/bitcoin/bitcoin/pull/17482) util: Disallow network-qualified command line options (ryanofsky)
• #17507 (https://github.com/bitcoin/bitcoin/pull/17507) random: mark RandAddPeriodic and SeedPeriodic as noexcept (fanquake)
• #17527 (https://github.com/bitcoin/bitcoin/pull/17527) Fix CPUID subleaf iteration (sipa)
• #17604 (https://github.com/bitcoin/bitcoin/pull/17604) util: Make schedulebatchpriority advisory only (fanquake)
• #17650 (https://github.com/bitcoin/bitcoin/pull/17650) util: Remove unwanted fields from bitcoin-cli -getinfo (malevolent)
• #17671 (https://github.com/bitcoin/bitcoin/pull/17671) script: Fixed wget call in gitian-build.py (willyko)
• #17699 (https://github.com/bitcoin/bitcoin/pull/17699) Make env data logging optional (sipa)
• #17721 (https://github.com/bitcoin/bitcoin/pull/17721) util: Don't allow base58 decoding of non-base58 strings. add base58 tests (practicalswift)
• #17750 (https://github.com/bitcoin/bitcoin/pull/17750) util: Change getwarnings parameter to bool (jnewbery)
• #17753 (https://github.com/bitcoin/bitcoin/pull/17753) util: Don't allow base32/64-decoding or parsemoney(…) on strings with embedded nul characters. add tests (practicalswift)
• #17823 (https://github.com/bitcoin/bitcoin/pull/17823) scripts: Read suspicious hosts from a file instead of hardcoding (sanjaykdragon)
• #18162 (https://github.com/bitcoin/bitcoin/pull/18162) util: Avoid potential uninitialized read in formatiso8601datetime(int64_t) by checking gmtime_s/gmtime_r return value (practicalswift)
• #18167 (https://github.com/bitcoin/bitcoin/pull/18167) Fix a violation of C++ standard rules where unions are used for type-punning (TheQuantumPhysicist)
• #18225 (https://github.com/bitcoin/bitcoin/pull/18225) util: Fail to parse empty string in parsemoney (MarcoFalke)
• #18270 (https://github.com/bitcoin/bitcoin/pull/18270) util: Fail to parse whitespace-only strings in parsemoney(…) (instead of parsing as zero) (practicalswift)
• #18316 (https://github.com/bitcoin/bitcoin/pull/18316) util: Helpexamplerpc formatting (jonatack)
• #18357 (https://github.com/bitcoin/bitcoin/pull/18357) Fix missing header in sync.h (promag)
• #18412 (https://github.com/bitcoin/bitcoin/pull/18412) script: Fix script_err_sig_pushonly error string (theStack)
• #18416 (https://github.com/bitcoin/bitcoin/pull/18416) util: Limit decimal range of numbers parsescript accepts (pierreN)
• #18503 (https://github.com/bitcoin/bitcoin/pull/18503) init: Replace URL_WEBSITE with PACKAGE_URL (MarcoFalke)
• #18526 (https://github.com/bitcoin/bitcoin/pull/18526) Remove PID file at the very end (hebasto)
• #18553 (https://github.com/bitcoin/bitcoin/pull/18553) Avoid non-trivial global constants in SHA-NI code (sipa)
• #18665 (https://github.com/bitcoin/bitcoin/pull/18665) Do not expose and consider -logthreadnames when it does not work (hebasto)

Credits

Thanks to everyone who directly contributed to this release:

• 0xb10c
• 251
• 4d55397500
• Aaron Clauson
• Adam Jonas
• Albert
• Amiti Uttarwar
• Andrew Chow
• Andrew Toth
• Anthony Towns
• Antoine Riard
• Ava Barron
• Ben Carman
• Ben Woosley
• Block Mechanic
• Brian Solon
• Bushstar
• Carl Dong
• Carnhof Daki
• Cory Fields
• Daki Carnhof
• Dan Gershony
• Daniel Kraft
• dannmat
• Danny-Scott
• darosior
• David O'Callaghan
• Dominik Spicher
• Elichai Turkel
• Emil Engler
• emu
• Fabian Jahr
• fanquake
• Filip Gospodinov
• Franck Royer
• Gastón I. Silva
• gchuf
• Gleb Naumenko
• Gloria Zhao
• glowang
• Gr0kchain
• Gregory Sanders
• hackerrdave
• Harris
• hel0
• Hennadii Stepanov
• ianliu
• Igor Cota
• James Chiang
• James O'Beirne
• Jan Beich
• Jan Sarenik
• Jeffrey Czyz
• Jeremy Rubin
• JeremyCrookshank
• Jim Posen
• John Bampton
• John L. Jegutanis
• John Newbery
• Jon Atack
• Jon Layton
• Jonas Schnelli
• João Barbosa
• Jorge Timón
• Karl-Johan Alm
• kodslav
• Larry Ruane
• Luke Dashjr
• malevolent
• MapleLaker
• marcaiaf
• MarcoFalke
• Marius Kjærstad
• Mark Erhardt
• Mark Tyneway
• Martin Erlandsson
• Martin Zumsande
• Matt Corallo
• Matt Ward
• Michael Folkson
• Michael Polzer
• Micky Yun Chan
• Neha Narula
• nijynot
• naumenkogs
• NullFunctor
• Peter Bushnell
• pierrenn
• Pieter Wuille
• practicalswift
• randymcmillan
• Rjected
• Russell Yanofsky
• Samer Afach
• Samuel Dobson
• Sanjay K
• Sebastian Falbesoner
• setpill
• Sjors Provoost
• Stefan Richter
• stefanwouldgo
• Steven Roose
• Suhas Daftuar
• Suriyaa Sundararuban
• TheCharlatan
• Tim Akinbo
• Travin Keith
• tryphe
• Vasil Dimov
• Willy Ko
• Wilson Ccasihue S
• Wladimir J. van der Laan
• Yahia Chiheb
• Yancy Ribbens
• Yusuf Sahin HAMZA
• Zakk
• Zero

As well as to everyone that helped with translations on
Transifex (https://www.transifex.com/bitcoin/bitcoin/).

Maybe a bit unrelated but why does the bitcointalk header still state "News: Latest Bitcoin Core release: 0.19.1 [Torrent]" when 0.20.0 is out?

I just upgraded from the previous release and checked some APIs.
Could the warning at the bottom be somehow related to the upgrade?


$ bitcoin-cli -testnet getblockchaininfo | jq
{
  "chain": "test",
  "blocks": 1764143,
  "headers": 1764143,
  "bestblockhash": "00000000514399503aca1bffa0bc329646e54aaccdf439093c80b00b6fc87afb",
  "difficulty": 1,
  "mediantime": 1591701573,
  "verificationprogress": 1,
  "initialblockdownload": false,
  "chainwork": "00000000000000000000000000000000000000000000015bbaaea736421238f7",
  "size_on_disk": 27411014312,
  "pruned": false,
  "softforks": {
    "bip34": {
      "type": "buried",
      "active": true,
      "height": 21111
    },
    "bip66": {
      "type": "buried",
      "active": true,
      "height": 330776
    },
    "bip65": {
      "type": "buried",
      "active": true,
      "height": 581885
    },
    "csv": {
      "type": "buried",
      "active": true,
      "height": 770112
    },
    "segwit": {
      "type": "buried",
      "active": true,
      "height": 834624
    }
  },
  "warnings": "Warning: unknown new rules activated (versionbit 28)"
}

That is not related to the upgrade. This is a warning on testnet that has been around for a while.

macOS Catalina 10.15.5 is blocking this new binary:

https://i.imgur.com/t5iYUr0.png

I thought most recent Bitcoin Core releases have passed Apple's AppStore CodeSignature checks.

Do we know why this is failing now and is this expected?  Thanks.

It's probably related to app notarization which Bitcoin Core does not do. This is separate from Code Signing.

Sir, does the Bitcoin Core wallet take up a lot of data storage after synchronization. My data storage capacity is 200GB. Other software 90 GB, remaining 18 GB. So the Bitcoin Core wallet consumes around 90 GB of data storage.
Is it true?

Yes. I only use the Bitcoin Core wallet to hold BTC. I have deleted the file system of Bitcoin Core by almost 85 GB. Because not enough storage space. 85 GB only just completed 24% synchronization.
And I have backup the file wallet.dat
So when we first install, what do we need to do?
I use the Windows operating system.

https://i.imgur.com/FEN1rZ6.jpg

Thank's sir.

Whether the synchronizing process will run up to 320GB, then prune.
Sorry to bother you.

You will have to download the whole thing yes, but that shouldn't matter since you will only store 2GB at the time.

Did I understand correctly that only 2GB is used quickly?

So brother, I have to provide space for initial downloads of around 320 GB.
At the moment I am stopping synchronization, and moving the synchronization process to the primary store.

---

So a little information for friends who are still new about the Bitcoin Core wallet. Don't lose the wallet.dat file
Because this file contains your Bitcoin address.
The search process can be guided by images.

https://i.ibb.co/3cKsmgn/Capture.jpg

This needs to be done if you are not doing backups on the Bitcoin Core application.
Sorry, I only use the Windows operating system, and don't understand Mac OS, or Linux.

Add.
You must display the hidden file to find the file wallet.dat
Because the Bitcoin file is in a hidden folder.
The trick, click view -> check on Hidden Items

No, you don't need to have space for 320 GB. It will download the whole thing, but not store it. That means that once you download 2GB, some files will be deleted, then some more will be downloaded again until you reach 2GB, and so on.

Oh yes brother, I understand. This means that the file will be discarded automatically when new file synchronization is entered. Thank's sir  ;).
Understandable, because the condition of the computer is still low, so worried about something very simple.  ;D ;D ;D

My mate has same issue with MacOs Catalina we fixed it by changing apps setting. I think it's due to new macOS. We found improvement in blockchain download. It's lot faster than previous version.

Hi everyone,

In the latest version of Bitcoin Core ver. 0.20 there seems to be no Bitcoin folder in the C:\Users\ABC\AppData\Roaming - hence wallet.dat is not stored in there.



Does anyone have experience with this and knows where it's now stored please?

I would appreciate your sharing and thanks a lot.

Cheers,

TN

It didn't change. Defaults like these don't just change, especially if there was nothing wrong with them.

You probably chose a different datadir. Go to Window > Information and it will list the datadir path in that window.

In Window > Information it only shows me the directory where the blockchain is downloaded, but the wallet.dat file is not there. I haven't found a Bitcoin folder in the /user/Appdata/Roaming folder where the wallet.dat is usually stored. It seems strange to me as I searched for wallet.dat in the whole C drive and only wallet.dat of Electrum is in /user/Appdata/Roaming. Bitcoin core doesn't show up.

Wallets are stored in the datadir (i.e. where the blockchain is downloaded) unless you specified it to go somewhere else with -walletdir. It should be in <datadir>/wallets. You can also look at the debug.log file. There should be a line that looks like
The path to the directory containing your wallet file will be everything before /database and /db.log

I realized that I chose another drive to store the blockchain and the wallet.dat is also in there :) Thank you for your help!

I think it's better to save in Drive D or E. Don't save the system, so when the PC is installed there is no need to re-synchronize.  I think this will save your time and internet data. I'm synchronizing my wallet, and it hasn't finished until now. ;D ;D ;D
Because if I synchronize my Bitcoin wallet, I have to stop all other work. Because the internet source is drained for wallet sync. This is an impressive struggle for the core wallet. :-*

What about the issue with solo mining on core 0.20.0 as listed here:

https://github.com/bitcoin/bitcoin/issues/19182

At the moment no one can solo mine if he wan't to.

------
EDIT:

It is related to the removed coinbase flags, wich cause this problem in cgminer as well as ckpool.
https://github.com/bitcoin/bitcoin/commit/9aedabe67eedfee9c94c6a50962f11348eb99bca

so, a new cgminer/ckpool version wich address this is necessary if core 0.20.0 will be used.

I did not tested bfg-miner, but leave that to lukejr.

thanks for your attention

Does my computer support? It is only DualCore

yes. a single core will do actually. even raspberry pis can run core, and i believe a lot of old notebooks are used for local casual nodes as they use less power than desktops, but more than a rpi of course. just need about 500 gb storage if you want the full blockchain (recommended), less if you run pruned.

this seems a bit out of date but read here:
https://bitcoin.org/en/full-node#what-is-a-full-node

0.20.1 has been released (https://bitcointalk.org/index.php?topic=5266075.msg54914612#msg54914612)