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154 lines
6.3 KiB
Markdown
154 lines
6.3 KiB
Markdown
(note: this is a temporary file, to be added-to by anybody, and moved to
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release-notes at release time)
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Bitcoin Core version *version* is now available from:
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<https://bitcoin.org/bin/bitcoin-core-*version*/>
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This is a new major version release, including new features, various bugfixes
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and performance improvements, as well as updated translations.
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Please report bugs using the issue tracker at github:
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<https://github.com/bitcoin/bitcoin/issues>
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To receive security and update notifications, please subscribe to:
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<https://bitcoincore.org/en/list/announcements/join/>
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Compatibility
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==============
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Bitcoin Core is extensively tested on multiple operating systems using
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the Linux kernel, macOS 10.8+, and Windows Vista and later.
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Microsoft ended support for Windows XP on [April 8th, 2014](https://www.microsoft.com/en-us/WindowsForBusiness/end-of-xp-support).
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No attempt is made to prevent installing or running the software on Windows XP, you
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can still do so at your own risk but be aware that there are known instabilities.
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Please do not report issues about Windows XP to the issue tracker.
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Bitcoin Core should also work on most other Unix-like systems but is not
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frequently tested on them.
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Notable changes
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===============
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Low-level RPC changes
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----------------------
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- `importprunedfunds` only accepts two required arguments. Some versions accept
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an optional third arg, which was always ignored. Make sure to never pass more
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than two arguments.
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Fee Estimation Changes
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----------------------
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- Since 0.13.2 fee estimation for a confirmation target of 1 block has been
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disabled. This is only a minor behavior change as there was often insufficient
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data for this target anyway. `estimatefee 1` will now always return -1 and
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`estimatesmartfee 1` will start searching at a target of 2.
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- The default target for fee estimation is changed to 6 blocks in both the GUI
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(previously 25) and for RPC calls (previously 2).
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Removal of Priority Estimation
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-------------------------------
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- Estimation of "priority" needed for a transaction to be included within a target
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number of blocks has been removed. The rpc calls are deprecated and will either
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return -1 or 1e24 appropriately. The format for `fee_estimates.dat` has also
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changed to no longer save these priority estimates. It will automatically be
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converted to the new format which is not readable by prior versions of the
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software.
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- The concept of "priority" (coin age) transactions is planned to be removed in
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the next major version. To prepare for this, the default for the rate limit of
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priority transactions (`-limitfreerelay`) has been set to `0` kB/minute. This
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is not to be confused with the `prioritisetransaction` RPC which will remain
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supported for adding fee deltas to transactions.
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P2P connection management
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--------------------------
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- Peers manually added through the addnode option or addnode RPC now have their own
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limit of eight connections which does not compete with other inbound or outbound
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connection usage and is not subject to the maxconnections limitation.
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- New connections to manually added peers are much faster.
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Introduction of assumed-valid blocks
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-------------------------------------
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- A significant portion of the initial block download time is spent verifying
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scripts/signatures. Although the verification must pass to ensure the security
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of the system, no other result from this verification is needed: If the node
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knew the history of a given block were valid it could skip checking scripts
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for its ancestors.
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- A new configuration option 'assumevalid' is provided to express this knowledge
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to the software. Unlike the 'checkpoints' in the past this setting does not
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force the use of a particular chain: chains that are consistent with it are
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processed quicker, but other chains are still accepted if they'd otherwise
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be chosen as best. Also unlike 'checkpoints' the user can configure which
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block history is assumed true, this means that even outdated software can
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sync more quickly if the setting is updated by the user.
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- Because the validity of a chain history is a simple objective fact it is much
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easier to review this setting. As a result the software ships with a default
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value adjusted to match the current chain shortly before release. The use
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of this default value can be disabled by setting -assumevalid=0
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0.14.0 Change log
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=================
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Detailed release notes follow. This overview includes changes that affect
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behavior, not code moves, refactors and string updates. For convenience in locating
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the code changes and accompanying discussion, both the pull request and
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git merge commit are mentioned.
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### RPC and REST
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UTXO set query (`GET /rest/getutxos/<checkmempool>/<txid>-<n>/<txid>-<n>/.../<txid>-<n>.<bin|hex|json>`) responses
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were changed to return status code HTTP_BAD_REQUEST (400) instead of HTTP_INTERNAL_SERVER_ERROR (500) when requests
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contain invalid parameters.
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The first boolean argument to `getaddednodeinfo` has been removed. This is an incompatible change.
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Call "getmininginfo" loses the "testnet" field in favor of the more generic "chain" (which has been present for years).
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### Configuration and command-line options
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### Block and transaction handling
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### P2P protocol and network code
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### Validation
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### Build system
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### Wallet
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0.14.0 Fundrawtransaction change address reuse
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==============================================
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Before 0.14, `fundrawtransaction` was by default wallet stateless. In almost all cases `fundrawtransaction` does add a change-output to the outputs of the funded transaction. Before 0.14, the used keypool key was never marked as change-address key and directly returned to the keypool (leading to address reuse).
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Before 0.14, calling `getnewaddress` directly after `fundrawtransaction` did generate the same address as the change-output address.
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Since 0.14, fundrawtransaction does reserve the change-output-key from the keypool by default (optional by setting `reserveChangeKey`, default = `true`)
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Users should also consider using `getrawchangeaddress()` in conjunction with `fundrawtransaction`'s `changeAddress` option.
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### GUI
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### Tests
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### Miscellaneous
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Credits
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=======
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Thanks to everyone who directly contributed to this release:
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As well as everyone that helped translating on [Transifex](https://www.transifex.com/projects/p/bitcoin/).
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