b492684063 doc: Temporary note that release notes should be edited in wiki (Wladimir J. van der Laan)
Pull request description:
Replace release notes with temporary note that 0.20.0 release notes should be edited in wiki.
ACKs for top commit:
MarcoFalke:
ACK b492684063
Tree-SHA512: 7a8835f7807e3cd6e4fea2969cf4dfa21d2aab2be7bfc1a6403926ea60e1193573e967d7ff512a640395e06de4877fec7f7a5c48619856f69fd5f894d27f1875
If you are running an older version, shut it down. Wait until it has completely
shut down (which might take a few minutes for older versions), 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 datadir 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. It is not recommended
to use Bitcoin Core on unsupported systems.
Bitcoin Core should also work on most other Unix-like systems but is not
as frequently tested on them.
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.
In addition to previously supported CPU platforms, this release's pre-compiled
distribution provides binaries for the RISC-V platform.
Notable changes
===============
P2P and network changes
-----------------------
#### Removal of reject network messages from Bitcoin Core (BIP61)
The command line option to enable BIP61 (`-enablebip61`) has been removed.
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 ("reject")
messages, so this should only ever be used when connected to a trusted node.
Please use the recommended alternatives if you rely on this deprecated 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 use the absence of "reject" messages to indicate a
transaction has propagated the network, nor should wallets use "reject"
messages to set transaction fees. Wallets should rather use fee estimation
to determine transaction fees and set replace-by-fee if desired. Thus, they
could wait until the transaction has confirmed (taking into account the fee
target they set (compare the RPC `estimatesmartfee`)) or listen for the
transaction announcement by other network peers to check for propagation.
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
------------
- `testmempoolaccept` and `sendrawtransaction` no longer return the P2P REJECT
code when a transaction is not accepted to the mempool. See the Section
_Removal of reject network messages from Bitcoin Core (BIP61)_ for details on
the removal of BIP61 REJECT message support.
- A new descriptor type `sortedmulti(...)` has been added to support multisig scripts where the public keys are sorted lexicographically in the resulting script.
- `walletprocesspsbt` and `walletcreatefundedpsbt` now include BIP 32 derivation paths by default for public keys if we know them. This can be disabled by setting `bip32derivs` to `false`.
Build System
------------
- OpenSSL is no longer used by Bitcoin Core. The last usage of the library
was removed in #17265.
- 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.
Further details can be found in #17538.
New RPCs
--------
New settings
------------
- RPC Whitelist system. It can give certain RPC users permissions to only some RPC calls.
It can be set with two command line arguments (`rpcwhitelist` and `rpcwhitelistdefault`). (#12763)
- A new `-asmap` configuration option has been added to enable IP-to-ASN mapping
for bucketing of the network peers to diversify the network connections. The
legacy /16 prefix mapping remains the default. See [issue
MarcoFalke
5 years ago