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Subnet matching for the purpose of access control is now doneīy matching the binary network address, instead of with string wildcard matching.įor the user this means that -rpcallowip takes a subnet specification, which can be

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Returns -1 if notĮnough free transactions have been observed to compute a good estimatepriority nblocks : Returns approximate priority needed forĪ zero-fee transaction to begin confirmation within nblocks.Transactions have been observed to compute a good estimate.

estimatefee nblocks : Returns approximate fee-per-1,000-bytes needed forĪ transaction to begin confirmation within nblocks.

-sendfreetransactions : Send transactions as zero-fee transactions if possible.

So they are likely to begin confirmation within n blocks (default: 1).

-txconfirmtarget=n : create transactions that have enough fees (or priority).

New command line options for transaction fee changes: Program shutdown, and are read in at startup. Statistics used to estimate fees and priorities are saved in theĭata directory in the fee_estimates.dat file just before Sometimes create transactions that took a very long time to confirm. Prior releases used hard-coded fees (and priorities), and would Fees are added by default unless the ‘sendfreetransactions’ ‘txconfirmtarget’ setting to control the tradeoff between fees andĬonfirmation times. Settings will create transactions that confirm quickly see the new High a priority) transactions require to be confirmed quickly. This release automatically estimates how high a transaction fee (or how Including those we only have headers for.

A new RPC getchaintips lists all known branches of the block chain,.

Have requested from peers (but haven’t received yet) are also listed as While synchronizing, the heights of the blocks that we

getpeerinfo lists both the number of blocks and headers we know we have inĬommon with each peer.

getblockchaininfo now returns the number of validated headers in addition to.

Very first few minutes, when headers are still being fetched and verified, butĪ few RPCs were added/updated as a result of this:

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Recent hardware with a decent network link, it can be as little as 3 hoursįor an initial full synchronization. In practice, this means a much faster and more robust synchronization. However, as we already know about the whole chain inĪdvance, the blocks can be downloaded in parallel from all available peers. In a second stage, when the headers have been discovered, weĭownload the blocks. This means that we firstĪsk peers for block headers (a total of 27 megabytes, as of December 2014) and This does not affect wallet forward or backward compatibility.īitcoin Core now uses ‘headers-first synchronization’.

Supported and may break as soon as the older version attempts to reindex. Synchronised 0.10 node may be usable in older versions as-is, but this is not It is possible that the data from a completely Without this your node will need start syncing (or importing fromīootstrap.dat) anew afterwards. If you want to be able to downgrade smoothly, make a backup of your entire dataĭirectory. Stored on disk, which earlier versions won’t support. The block index database will now hold headers for which no block is Reindexing using earlier versions will also not work Received, really), which makes it incompatible with some tools or

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Downgrading warningīecause release 0.10.0 makes use of headers-first synchronization and parallelīlock download (see further), the block files and databases are notīackwards-compatible with older versions of Bitcoin Core or other software:īlocks will be stored on disk out of order (in the order they are Installer (on Windows) or just copy over /Applications/Bitcoin-Qt (on Mac) orīitcoind/bitcoin-qt (on Linux). Shut down (which might take a few minutes for older versions), then run the

If you are running an older version, shut it down.