Blockchain database corrupted warnings
Bitcoin Core installation binaries can be downloaded from bitcoincore. If you are running an older version, shut it down. Blocks will be stored on disk out of order in the order they are received, reallywhich makes it incompatible with some tools or other programs.
Reindexing using earlier versions will also not work anymore as a result of this. If you want to be able to downgrade smoothly, make a backup of your entire data directory. Without this your node will need start syncing or importing from bootstrap. Blockchain database corrupted warnings is possible that the data from a completely synchronised 0. This does not affect wallet forward or backward compatibility. There are no known problems when downgrading from 0.
At the time of this release, the P2P network is being flooded with low-fee transactions. This causes a ballooning of the mempool size. If this growth of the mempool causes problematic memory use on your node, it is possible to change a few configuration options to work around this. The growth of the mempool can be monitored with the RPC command getmempoolinfo. One is to increase the minimum transaction relay fee minrelaytxfeewhich defaults to 0.
The other is to restrict the relaying of free transactions with limitfreerelay. It defaults to Reducing this number reduces the speed at which the mempool can grow due blockchain database corrupted warnings free transactions. This release blockchain database corrupted warnings running a fully validating blockchain database corrupted warnings without maintaining a copy of the raw block and undo data on disk. To recap, there are four types of data related to the blockchain in the bitcoin system: The databases are built from the raw data.
The block index continues to hold the metadata about all blocks in the blockchain. The minimum allowed is MB. Note that this is in addition to whatever is required for the block index and UTXO databases.
The minimum was chosen so that Bitcoin Core will be able to maintain at blockchain database corrupted warnings blocks on disk two days worth blockchain database corrupted warnings blocks at 10 minutes per block. Blockchain database corrupted warnings rare instances it is possible that the amount of space used will exceed the pruning target in order to keep the required last blocks on disk. Thus, if the user specifies MB, once that level is reached the program will begin deleting the oldest block and undo files, while continuing to download the blockchain.
For now, block pruning blockchain database corrupted warnings block relay. Block pruning is currently incompatible with running a wallet due to the fact that block data is used for rescanning the wallet and importing keys or addresses which require a rescan.
However, running the wallet with block pruning will be supported blockchain database corrupted warnings the near future, subject to those limitations. Once you have pruned blocks, going back to unpruned state requires re-downloading the entire blockchain.
To do this, re-start the node with -reindex. Note also that any problem that would cause a user to reindex e. Finally, note that when a pruned node reindexes, it will delete any blk???.
Experimental support for big-endian CPU architectures was added in this release. All little-endian specific code was replaced with endian-neutral constructs. The build system will automatically detect the endianness of the target.
There have been many changes in this release to reduce the default memory usage of a node, among which:. This release improves the algorithm used for fee estimation. Previously, -1 was returned when there was insufficient data to give an estimate. Now, -1 will also be returned when there is no fee or priority high enough for the desired confirmation target.
In those cases, it can help to ask for an estimate for a higher target number of blocks. This option allows separating transaction submission from the node functionality. Making use of this, third-party scripts can be written to take care of transaction blockchain database corrupted warnings broadcast:.
One such application is selective Tor usage, where the node runs on the normal internet but transactions are broadcasted over Tor. For an example script see bitcoin-submittx. This release adds functionality to create a new circuit for every peer connection, when the software is used with Tor.
The new option, -proxyrandomizeis on by default. When enabled, every outgoing connection will potentially go through a different exit node.
That significantly reduces the chance to get unlucky and pick a single exit node that is either malicious, or widely banned from the P2P network. This improves connection reliability as well as privacy, especially for the initial connections. Detailed release notes follow. This overview includes changes that affect behavior, not code moves, refactors and string updates. For convenience in locating the code changes and accompanying discussion, both the pull request and git merge commit are mentioned.
As well as everyone that helped translating on Transifex. Bitcoin Core version 0. Please report bugs using the issue tracker at github: Downgrade warning Because release 0. Important information Transaction flooding At the time of this release, the P2P network is being flooded with low-fee transactions. For example, add the following to bitcoin.
It is recommended to upgrade to this version as soon as possible. If you are running an older version, shut it down. Blocks will be stored on disk out of order in the order they are received, reallywhich makes it incompatible with some tools or other programs. Reindexing using earlier versions blockchain database corrupted warnings also not work anymore as a result of this.
If you want to be able to downgrade smoothly, make a backup of your entire data directory. Without this your node will need start syncing or importing from bootstrap. It is possible that the data from a completely synchronised 0.
This does not affect wallet forward or backward compatibility. There are no known problems when downgrading from 0. This release will produce version 4 blocks by default.
Please see the notice to miners below. For more information about the soft-forking change, please see https: Block versions over the last 50, blocks as progress towards BIP65 consensus enforcement: Block versions over the last 2, blocks showing the days to the earliest possible BIP65 consensus-enforced block: If you are mining with the getblocktemplate protocol to a pool: Bitcoin transactions currently may specify a locktime indicating when blockchain database corrupted warnings may be added to a valid block.
Current consensus rules require that blocks have a block header time greater than the locktime specified in any transaction in that block. Miners get to choose what time they use for their header time, with the consensus rule being that no node will accept a block blockchain database corrupted warnings time is more blockchain database corrupted warnings two hours in the future.
The consensus rules also specify that valid blocks may have a header time greater than that of the median of the 11 previous blocks.
This GetMedianTimePast time has a key feature we generally associate with time: BIP specifies a soft fork not enforced in this release that weakens this perverse incentive for individual miners to use a blockchain database corrupted warnings time by requiring that valid blocks have a computed GetMedianTimePast greater than the locktime specified in any transaction in that block.
Mempool inclusion rules currently require transactions to be valid for immediate inclusion in a block in order to be accepted into the mempool.
This release begins applying the BIP rule to received transactions, so transaction whose time is greater than the GetMedianTimePast will no longer be accepted into the mempool. Any transactions which are valid under the current blockchain database corrupted warnings but not yet valid under the BIP rules will either be mined by other miners or delayed until they are valid under BIP Note, however, that time-based locktime transactions are more or less unseen on the network currently.
GetMedianTimePast always trails behind the current time, so a transaction locktime set to the present time will be rejected by nodes running this release until the median time moves forward. To compensate, subtract one hour 3, seconds from your locktimes to allow those transactions to be included in blockchain database corrupted warnings at approximately the expected time.
Several Windows users reported that they often need to reindex the entire blockchain database corrupted warnings after an unclean shutdown of Bitcoin Core on Windows or an unclean shutdown of Windows itself. Although unclean shutdowns remain unsafe, this release no longer relies on memory-mapped files for the UTXO database, which significantly reduced the frequency of unclean shutdowns leading to required blockchain database corrupted warnings during testing. For more information, see: Detailed release notes follow.
This overview includes changes that affect behavior, not code moves, refactors and string updates. For convenience in locating the code changes and accompanying discussion, both the pull blockchain database corrupted warnings and git merge commit are mentioned.
As well as everyone that helped translating on Transifex. Bitcoin Core version 0. Please report bugs using blockchain database corrupted warnings issue tracker at github: Downgrade warning Because release 0. Notable changes since 0.
If you are mining with the stratum mining protocol: BIP mempool-only locktime enforcement using GetMedianTimePast Bitcoin transactions currently may specify a locktime indicating when they may be added to a valid block.
Windows bug fix for corrupted UTXO database on unclean shutdowns Several Windows users reported that they often need to reindex the entire blockchain after an unclean shutdown of Bitcoin Core on Windows or an unclean shutdown of Windows itself. Split bitcoin-tx into its own package 33d Bugfix: Allow mining on top of old tip blocks for testnet 21e58b8 build: Win32WritableFile without memory mapping 4eb0 Always flush block and undo when switching to new file Credits Thanks to everyone who directly contributed to this release:
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You can't create non-HD wallets with this version. You can't disable HD on an already existing HD wallet". Duplicate -wallet filename specified. Invalid characters in -wallet filename. A fatal internal error occurred, see debug.
Disk space is low! Wrong datadir for network? See debug log for details.