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Litecoin Core version 0.10.4.0 is now available from:
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<https://download.litecoin.org/litecoin-0.10.4.0/>
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This is a new minor version release, bringing bug fixes, the BIP65
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(CLTV) consensus change, and relay policy preparation for BIP113. It is
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recommended to upgrade to this version as soon as possible.
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Please report bugs using the issue tracker at github:
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<https://github.com/litecoin-project/litecoin/issues>
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Upgrading and downgrading
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=========================
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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/Litecoin-Qt (on Mac) or
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litecoind/litecoin-qt (on Linux).
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Downgrade warning
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------------------
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Because release 0.10+ and later makes use of headers-first synchronization and
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parallel block download (see further), the block files and databases are not
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backwards-compatible with pre-0.10 versions of Litecoin Core or other software:
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* Blocks will be stored on disk out of order (in the order they are
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received, really), which makes it incompatible with some tools or
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other programs. Reindexing using earlier versions will also not work
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anymore as a result of this.
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* The block index database will now hold headers for which no block is
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stored on disk, which earlier versions won't support.
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If you want to be able to downgrade smoothly, make a backup of your entire data
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directory. Without this your node will need start syncing (or importing from
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bootstrap.dat) anew afterwards. It is possible that the data from a completely
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synchronised 0.10 node may be usable in older versions as-is, but this is not
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supported and may break as soon as the older version attempts to reindex.
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This does not affect wallet forward or backward compatibility.
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Notable changes since 0.10.3
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============================
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BIP65 soft fork to enforce OP_CHECKLOCKTIMEVERIFY opcode
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--------------------------------------------------------
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This release includes several changes related to the [BIP65][] soft fork
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which redefines the existing OP_NOP2 opcode as OP_CHECKLOCKTIMEVERIFY
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(CLTV) so that a transaction output can be made unspendable until a
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specified point in the future.
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1. This release will only relay and mine transactions spending a CLTV
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output if they comply with the BIP65 rules as provided in code.
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2. This release will produce version 4 blocks by default. Please see the
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*notice to miners* below.
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3. Once 951 out of a sequence of 1,001 blocks on the local node's best block
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chain contain version 4 (or higher) blocks, this release will no
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longer accept new version 3 blocks and it will only accept version 4
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blocks if they comply with the BIP65 rules for CLTV.
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**Notice to miners:** Litecoin Core’s block templates are now for
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version 4 blocks only, and any mining software relying on its
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getblocktemplate must be updated in parallel to use libblkmaker either
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version v0.4.3 or any version from v0.5.2 onward.
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- If you are solo mining, this will affect you the moment you upgrade
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Litecoin Core, which must be done prior to BIP65 achieving its 951/1001
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status.
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- If you are mining with the stratum mining protocol: this does not
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affect you.
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- If you are mining with the getblocktemplate protocol to a pool: this
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will affect you at the pool operator’s discretion, which must be no
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later than BIP65 achieving its 951/1001 status.
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[BIP65]: https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki
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Windows bug fix for corrupted UTXO database on unclean shutdowns
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----------------------------------------------------------------
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Several Windows users reported that they often need to reindex the
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entire blockchain after an unclean shutdown of Litecoin Core on Windows
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(or an unclean shutdown of Windows itself). Although unclean shutdowns
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remain unsafe, this release no longer relies on memory-mapped files for
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the UTXO database, which significantly reduced the frequency of unclean
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shutdowns leading to required reindexes during testing.
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For more information, see: <https://github.com/bitcoin/bitcoin/pull/6917>
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Other fixes for database corruption on Windows are expected in the
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next major release.
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0.10.4 Change log
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=================
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This release is based upon Bitcoin Core v0.10.4. Their upstream changelog applies to us and
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is included in as separate release-notes, see: [Release Notes](release-notes.md).
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This section describes the Litecoin-specific differences.
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- Added BIP65 CHECKLOCKTIMEVERIFY softfork.
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- Increased OP_RETURN relay size to 80 bytes.
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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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- Charles Lee
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- pooler
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- Adrian Gallagher
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- Anton Yemelyanov
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- Warren Togami
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- BtcDrak
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