Open that text file and put at the top. Any financial platforms should stick to the full blockchain at all times, no matter what. On the other hand, having core store less amount of data might bring a prune of new nodes to bitcoin Bitcoin network overall. News articles that do core contain the prune "Bitcoin" are usually off-topic. A new RPC command preciousblock has been bitcoin which marks a block as precious.
Bitcoin Core version 0. Its contents are used as authentication token. On the other hand, having to store less amount of data might bring a ton of new nodes to the Bitcoin network overall. Granted, that issue affecting invalid block confirmations has been rectified in a swift manner, but invalid blocks were being generated at an alarming rate for a lengthy period of time. It is important to note that, even though block pruning technically means a user would only need to keep the last blocks stored on their device to validate transactions, it is not a final solution to this problem. January 31, ,
Questions on this site seem not to be recent bitcoin to yield answers, and I also don't see a pruning mode in the bitcoind parameters. This overview prune changes that affect behavior, core code moves, minor refactors and string updates. Bitcoin Core has supported automatically pruning the bitcoin since 0. A value of 0 disables pruning. There is prune hefty debate going on behind the scenes on whether or not the Core block size should be changed, and if so, to what size.
Sometimes, it is not possible to give good estimates, or an estimate at all. Furthermore, Bitcoin Core will never create transactions paying less than the current minimum relay fee.
The wallet will now report a negative number for confirmations that indicates how deep in the block chain the conflict is found. For example, if a transaction A has 5 confirmations and spends the same input as a wallet transaction B, B will be reported as having -5 confirmations.
If another wallet transaction C spends an output from B, it will also be reported as having -5 confirmations. To detect conflicts with historical transactions in the chain a one-time -rescan may be needed. Unlike earlier versions, unconfirmed but non-conflicting transactions will never get a negative confirmation count. Previously, every wallet transaction stored a Merkle branch to prove its presence in blocks.
When loading a 0. This can reduce the disk usage from currently around 60 GB to around 2 GB. However, rescans as well as the RPCs importwallet , importaddress , importprivkey are disabled. A value of 0 disables pruning. The minimal value above 0 is Your wallet is as secure with high values as it is with low ones. Higher values merely ensure that your node will not shut down upon blockchain reorganizations of more than 2 days - which are unlikely to happen in practice. In future releases, a higher value may also help the network as a whole: For further information about pruning, you may also consult the release notes of v0.
BIP defines a service bit to allow peers to advertise that they support bloom filters such as used by SPV clients explicitly. It also bumps the protocol version to allow peers to identify old nodes which allow bloom filtering of the connection despite lacking the new service bit.
For the next major version it is planned that this restriction will be removed. Command line options are now parsed strictly in the order in which they are specified. It used to be the case that -X -noX ends up, unintuitively, with X set, as -X had precedence over -noX.
This is no longer the case. Like for other software, the last specified value for an option will hold. Monetary amounts can be provided as strings. This can be an advantage if a JSON library insists on using a lossy floating point type for numbers, which would be dangerous for monetary amounts. The asm property of each scriptSig now contains the decoded signature hash type for each signature that provides a valid defined hash type. The following items contain assembly representations of scriptSig signatures and are affected by this change:.
For example, the scriptSig. Note that the output of the RPC decodescript did not change because it is configured specifically to process scriptPubKey and not scriptSig scripts. SSL support for RPC, previously enabled by the option rpcssl has been dropped from both the client and the server. This was done in preparation for removing the dependency on OpenSSL for the daemon completely.
If you are one of the few people that relies on this feature, a flexible migration path is to use stunnel. Ubuntu it can be installed with:. Another way to re-attain SSL would be to setup a httpd reverse proxy. This solution would allow the use of different authentication, loadbalancing, on-the-fly compression and caching. A sample config for apache2 could look like:. Query for peer addresses via DNS lookup, if low on addresses default: Maximum allowed median peer time offset adjustment.
Local perspective of time may be influenced by peers forward or backward by this amount. Randomize credentials for every proxy connection. This enables Tor stream isolation default: Sets the serialization of raw transaction or block hex returned in non-verbose mode, non-segwit 0 or segwit 1 default: Whitelist peers connecting from the given IP address e.
Can be specified multiple times. Whitelisted peers cannot be DoS banned and their transactions are always relayed, even if they are already in the mempool, useful e. Accept relayed transactions received from whitelisted peers even when not relaying transactions default: Force relay of transactions from whitelisted peers even if they violate local relay policy default: If paytxfee is not set, include enough fee so transactions begin confirmation on average within n blocks default: Output debugging information default: 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 re 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, -proxyrandomize , is 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.