make-release.py: Updated release notes and changelog for 4.3.0-rc1.

contrib/debian/changelog

@@ -1,3 +1,9 @@
+zcash (4.3.0~rc1) stable; urgency=medium
+
+  * 4.3.0-rc1 release.
+
+ -- Electric Coin Company <team@electriccoin.co>  Fri, 19 Feb 2021 22:05:06 +0000
+
 zcash (4.2.0) stable; urgency=medium
 
   * 4.2.0 release.

doc/release-notes/release-notes-4.3.0-rc1.md

@@ -0,0 +1,320 @@
+Notable changes
+===============
+
+Reduce download traffic
+-----------------------
+
+We have made several changes to reduce the amount of data downloaded by `zcashd`
+during initial block download (IBD):
+
+- Significant time and bandwidth is spent in issuing `getheaders` P2P requests.
+  This results in noticeable bandwidth usage due to the large size of Zcash
+  block headers.
+
+  We now eliminate redundant requests in cases where we already know the last
+  header in the message. This optimization is enabled by default, but can be
+  disabled by setting the config option `-no-optimize-getheaders`.
+
+- Transactions in the mempool are no longer downloaded during IBD (`zcashd` will
+  only request block data).
+
+Reduce upload traffic
+---------------------
+
+A major part of the outbound traffic is caused by serving historic blocks to
+other nodes in initial block download state.
+
+It is now possible to reduce the total upload traffic via the `-maxuploadtarget`
+parameter. This is *not* a hard limit but a threshold to minimize the outbound
+traffic. When the limit is about to be reached, the uploaded data is cut by not
+serving historic blocks (blocks older than one week).
+Moreover, any SPV peer is disconnected when they request a filtered block.
+
+This option can be specified in MiB per day and is turned off by default
+(`-maxuploadtarget=0`).
+The recommended minimum is 1152 * MAX_BLOCK_SIZE (currently 2304MB) per day.
+
+Whitelisted peers will never be disconnected, although their traffic counts for
+calculating the target.
+
+A more detailed documentation about keeping traffic low can be found in
+[/doc/reduce-traffic.md](/doc/reduce-traffic.md).
+
+`libzcashconsensus` replaced by `libzcash_script`
+-------------------------------------------------
+
+The `libzcashconsensus` library inherited from upstream has been unusable since
+the Overwinter network upgrade in 2018. We made changes to signature digests
+similar to those made in Bitcoin's SegWit, which required additional per-input
+data that could not be added to the existing APIs without breaking backwards
+compatibility.
+
+Additionally, it has become increasingly inaccurately named; it only covers
+(Zcash's subset of) the Bitcoin scripting system, and not the myriad of other
+consensus changes: in particular, Zcash's shielded pools.
+
+We have now renamed the library to `libzcash_script`, and reworked it to instead
+focus on transparent script verification:
+
+- The script verification APIs are altered to take `consensusBranchId` and
+  `amount` fields.
+- New precomputing APIs have been added that enable multiple transparent inputs
+  on a single transaction to be verified more efficiently.
+- Equihash has been removed from the compiled library. The canonical Equihash
+  validator is the [`equihash` Rust crate](https://crates.io/crates/equihash)
+  since v3.1.0.
+
+The C++ library can be built by compiling `zcashd` with the environment variable
+`CONFIGURE_FLAGS=--with-libs`. It is also wrapped as the
+[`zcash_script` Rust crate](https://crates.io/crates/zcash_script)
+(maintained by the Zcash Foundation for use in `zebrad`).
+
+Other P2P Changes
+-----------------
+
+The list of banned peers is now stored on disk rather than in memory. Restarting
+`zcashd` will no longer clear out the list of banned peers; instead the
+`clearbanned` RPC call can be used to manually clear the list. The `setban` RPC
+call can also be used to manually ban or unban a peer.
+
+Build system updates
+--------------------
+
+- We now build with Clang 11 and Rust 1.49.
+- We have downgraded Boost to 1.74 to mitigate `statx`-related breakage in some
+  container environments.
+
+Changelog
+=========
+
+Alex Wied (3):
+      Add support for FreeBSD 12
+      Set rust_target for all FreeBSD versions
+      Use parentheses for defined in windows-unused-variables.diff
+
+Alfredo Garcia (3):
+      split wallet.py tests
+      hide password in -stdin `walletpassphrase` command
+      Apply suggestions from code review
+
+Bernhard M. Wiedemann (1):
+      Make tests pass after 2020
+
+BtcDrak (1):
+      Remove bad chain alert partition check
+
+Carl Dong (13):
+      build: Add variable printing target to Makefiles
+      depends: Propagate well-known vars into depends
+      depends: boost: Specify toolset to bootstrap.sh
+      depends: boost: Split target-os from toolset
+      depends: boost: Use clang toolset if clang in CXX
+      depends: Propagate only specific CLI variables to sub-makes
+      depends: boost: Refer to version in URL
+      depends: boost: Split into non-/native packages
+      depends: boost: Disable all compression
+      depends: boost: Cleanup architecture/address-model
+      depends: boost: Cleanup toolset selection
+      depends: boost: Remove unnecessary _archiver_
+      depends: boost: Specify cflags+compileflags
+
+Casey Rodarmor (3):
+      Make limited map actually respect max size
+      Disallow unlimited limited maps
+      Add limitedmap test
+
+Cory Fields (6):
+      depends: fix boost mac cross build with clang 9+
+      build: add missing leveldb defines
+      net: make Ban/Unban/ClearBan functionality consistent
+      net: No need to export DumpBanlist
+      net: move CBanDB and CAddrDB out of net.h/cpp
+      net: Drop CNodeRef for AttemptToEvictConnection
+
+Daira Hopwood (2):
+      qa/zcash/updatecheck.py: remove dead code; print instructions to run `cargo outdated` and `cargo update`.
+      Ensure that `CONFIGURE_FLAGS=--enable-debug` correctly uses -O0 for dependencies and main build.
+
+Daniel Kraft (1):
+      doc: add comment explaining initial header request
+
+Dimitris Apostolou (1):
+      Discord invite instead of direct link
+
+Ethan Heilman (1):
+      Fix de-serialization bug where AddrMan is corrupted after exception * CAddrDB modified so that when de-serialization code throws an exception Addrman is reset to a clean state * CAddrDB modified to make unit tests possible * Regression test created to ensure bug is fixed * StartNode modifed to clear adrman if CAddrDB::Read returns an error code.
+
+Gregory Maxwell (2):
+      Return early in IsBanned.
+      Disconnect on mempool requests from peers when over the upload limit.
+
+Igor Cota (1):
+      Define TARGET_OS when host is android
+
+Jack Grigg (41):
+      Add JSDescriptionInfo for constructing JSDescriptions
+      Remove JSDescription::h_sig
+      prevector: Terminate without logging on failed allocation
+      Remove init_and_check_sodium from crypto/common.h
+      Store inputs and outputs by reference in JSDescriptionInfo
+      depends: Update Rust to 1.49.0
+      rust: Use renamed broken_intra_doc_links lint
+      depends: cargo update
+      depends: Move to Clang 11
+      depends: Fix Boost warnings under Clang 11
+      depends: Allow per-host package download paths
+      depends: Ensure the native_clang download path is for the builder
+      Revert "Update boost to 1.75, postpone other updates."
+      qa: Postpone Boost and native_b2 updates
+      QA: Remove unused update postponements
+      QA: Postpone BDB update again
+      depends: ZeroMQ 4.3.4
+      depends: Postpone updates that require adding CMake
+      cargo update
+      Squashed 'src/univalue/' changes from 9ef5b78c1..98fadc090
+      Remove crypto/equihash from libzcashconsensus
+      Add amount and consensus branch ID to zcashconsensus_verify_script
+      Rename src/script/zcashconsensus.* -> src/script/zcash_script.*
+      Rename zcashconsensus_* -> zcash_script_* in APIs
+      Rename libzcashconsensus.la -> libzcash_script.la
+      Set up an mdbook in which we can document zcashd's architecture design
+      Actions: Add a workflow to deploy the zcashd book
+      Show README as root of zcashd book
+      Link to zips.z.cash for protocol spec
+      test: Convert Bech32 test vectors into known-answer test vectors
+      zcash_script: Add API to verify scripts with precomputed tx data
+      test: Migrate maxuploadtarget.py to Python 3
+      Pass current PoWTargetSpacing() into CNode::OutboundTargetReached()
+      init: Pass post-Blossom spacing into CNode::SetMaxOutboundTarget()
+      Fix some typos
+      zcash_script: Clarify return values in docs
+      Rename responsible_disclosure.md to SECURITY.md
+      Add IBD download traffic reduction to release notes
+      Fill out the rest of the 4.3.0 release notes
+      make-release.py: Versioning changes for 4.3.0-rc1.
+      make-release.py: Updated manpages for 4.3.0-rc1.
+
+Jeremy Rubin (1):
+      Minimal fix to slow prevector tests as stopgap measure
+
+Jonas Schnelli (14):
+      banlist.dat: store banlist on disk
+      CAddrDB/CBanDB: change filesize variables from int to uint64_t
+      use CBanEntry as object container for banned nodes
+      Adding CSubNet constructor over a single CNetAddr
+      [Qt] add ui signal for banlist changes
+      [Qt] banlist, UI optimizing and better signal handling
+      net: use CIDR notation in CSubNet::ToString()
+      [QA] fix netbase tests because of new CSubNet::ToString() output
+      Introduce -maxuploadtarget
+      [doc] add documentation how to reduce traffic
+      don't enforce maxuploadtargets disconnect for whitelisted peers
+      [docs] rename reducetraffic.md to reduce-traffic.md
+      add documentation for exluding whitelistes peer from maxuploadtarget
+      add (max)uploadtarget infos to getnettotals RPC help
+
+Josh Lehan (1):
+      Re-organize -maxconnections option handling
+
+Karel Bilek (1):
+      scripted-diff: Use UniValue.pushKV instead of push_back(Pair())
+
+Kaz Wesley (4):
+      fix race that could fail to persist a ban
+      prevector: destroy elements only via erase()
+      test prevector::swap
+      prevector::swap: fix (unreached) data corruption
+
+Kris Nuttycombe (4):
+      Skip "tx" messages during initial block download.
+      Fix pyflakes complaints
+      Whitespace-only fix in chainparams.cpp
+      Update the maxuploadtarget.py tests to accommodate zcash.
+
+Larry Ruane (1):
+      #4624 improve IBD sync by eliminating getheaders requests
+
+Marco Falke (3):
+      [net] Cleanup maxuploadtarget
+      [doc] Add -maxuploadtarget release notes
+      [walletdb] Add missing LOCK() in Recover() for dummyWallet
+
+Marius Kjærstad (3):
+      Update _COPYRIGHT_YEAR in configure.ac to 2021
+      Update COPYRIGHT_YEAR in clientversion.h to 2021
+      Update of copyright year to 2021
+
+Matt Corallo (6):
+      Default to defining endian-conversion DECLs in compat w/o config
+      Make fDisconnect an std::atomic
+      Make fImporting an std::atomic
+      Fix AddrMan locking
+      Remove double brackets in addrman
+      Fix unlocked access to vNodes.size()
+
+Patrick Strateman (1):
+      Avoid recalculating vchKeyedNetGroup in eviction logic.
+
+Peter Bushnell (1):
+      depends: Consistent use of package variable
+
+Peter Todd (1):
+      Remove LOCK(cs_main) from decodescript
+
+Philip Kaufmann (4):
+      banlist: update set dirty to be more fine grained
+      banlist: better handling of banlist in StartNode()
+      banlist: add more banlist infos to log / add GUI signal
+      banlist (bugfix): allow CNode::SweepBanned() to run on interval
+
+Pieter Wuille (11):
+      Add SipHash-2-4 primitives to hash
+      Use SipHash-2-4 for CCoinsCache index
+      Switch CTxMempool::mapTx to use a hash index for txids
+      Use SipHash-2-4 for address relay selection
+      Add extra message to avoid a long 'Loading banlist'
+      Support SipHash with arbitrary byte writes
+      Use 64-bit SipHash of netgroups in eviction
+      Use C++11 thread-safe static initializers
+      Add ChaCha20
+      Switch FastRandomContext to ChaCha20
+      Add a FastRandomContext::randrange and use it
+
+Suhas Daftuar (1):
+      Add RPC test for -maxuploadtarget
+
+Taylor Hornby (2):
+      Move the github API token out of updatecheck.py into an untracked file.
+      Document the required .updatecheck-token file in the release docs
+
+Wladimir J. van der Laan (6):
+      build: Updates for OpenBSD
+      net: Fix CIDR notation in ToString()
+      test: Add more test vectors for siphash
+      timedata: Prevent warning overkill
+      Always allow getheaders from whitelisted peers
+      rpc: remove cs_main lock from `createrawtransaction`
+
+fanquake (2):
+      [build] Add NETBSD leveldb target to configure.ac
+      [doc] Improve lanaguge in reducetraffic.md
+
+kirkalx (1):
+      peers.dat, banlist.dat recreated when missing
+
+randy-waterhouse (1):
+      Re-instate TARGET_OS=linux in configure.ac. Removed by 351abf9e035.
+
+Jack Grigg (1):
+      Update URL for Zcash Foundation security policy
+
+Ying Tong Lai (2):
+      Cargo update
+      Postpone dependencies
+
+tulip (1):
+      Move time data log print to 'net' category to reduce log noise
+
+Benjamin Winston (1):
+      Added foundation to responsible_disclosure.md
+