132 lines
5.3 KiB
Markdown
132 lines
5.3 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://bitcoincore.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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How to Upgrade
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==============
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If you are running an older version, shut it down. Wait until it has completely
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shut down (which might take a few minutes for older versions), then run the
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installer (on Windows) or just copy over `/Applications/Bitcoin-Qt` (on Mac)
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or `bitcoind`/`bitcoin-qt` (on Linux).
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The first time you run version 0.15.0, your chainstate database will be converted to a
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new format, which will take anywhere from a few minutes to half an hour,
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depending on the speed of your machine.
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Note that the block database format also changed in version 0.8.0 and there is no
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automatic upgrade code from before version 0.8 to version 0.15.0. Upgrading
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directly from 0.7.x and earlier without redownloading the blockchain is not supported.
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However, as usual, old wallet versions are still supported.
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Downgrading warning
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-------------------
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The chainstate database for this release is not compatible with previous
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releases, so if you run 0.15 and then decide to switch back to any
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older version, you will need to run the old release with the `-reindex-chainstate`
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option to rebuild the chainstate data structures in the old format.
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If your node has pruning enabled, this will entail re-downloading and
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processing the entire blockchain.
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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 7 and newer (Windows XP is not supported).
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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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RPC changes
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------------
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### Low-level changes
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- The `createrawtransaction` RPC will now accept an array or dictionary (kept for compatibility) for the `outputs` parameter. This means the order of transaction outputs can be specified by the client.
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- The `fundrawtransaction` RPC will reject the previously deprecated `reserveChangeKey` option.
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- `sendmany` now shuffles outputs to improve privacy, so any previously expected behavior with regards to output ordering can no longer be relied upon.
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- The new RPC `testmempoolaccept` can be used to test acceptance of a transaction to the mempool without adding it.
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External wallet files
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---------------------
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The `-wallet=<path>` option now accepts full paths instead of requiring wallets
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to be located in the -walletdir directory.
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Newly created wallet format
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---------------------------
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If `-wallet=<path>` is specified with a path that does not exist, it will now
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create a wallet directory at the specified location (containing a wallet.dat
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data file, a db.log file, and database/log.?????????? files) instead of just
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creating a data file at the path and storing log files in the parent
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directory. This should make backing up wallets more straightforward than
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before because the specified wallet path can just be directly archived without
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having to look in the parent directory for transaction log files.
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For backwards compatibility, wallet paths that are names of existing data files
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in the `-walletdir` directory will continue to be accepted and interpreted the
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same as before.
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Low-level RPC changes
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---------------------
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- When bitcoin is not started with any `-wallet=<path>` options, the name of
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the default wallet returned by `getwalletinfo` and `listwallets` RPCs is
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now the empty string `""` instead of `"wallet.dat"`. If bitcoin is started
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with any `-wallet=<path>` options, there is no change in behavior, and the
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name of any wallet is just its `<path>` string.
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- Bare multisig outputs to our keys are no longer automatically treated as
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incoming payments. As this feature was only available for multisig outputs for
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which you had all private keys in your wallet, there was generally no use for
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them compared to single-key schemes. Furthermore, no address format for such
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outputs is defined, and wallet software can't easily send to it. These outputs
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will no longer show up in `listtransactions`, `listunspent`, or contribute to
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your balance, unless they are explicitly watched (using `importaddress` or
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`importmulti` with hex script argument). `signrawtransaction*` also still
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works for them.
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### Logging
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- The log timestamp format is now ISO 8601 (e.g. "2018-02-28T12:34:56Z").
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Miner block size removed
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------------------------
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The `-blockmaxsize` option for miners to limit their blocks' sizes was
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deprecated in V0.15.1, and has now been removed. Miners should use the
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`-blockmaxweight` option if they want to limit the weight of their blocks'
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weights.
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Python Support
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--------------
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Support for Python 2 has been discontinued for all test files and tools.
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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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