0.20.12

Bitcoin ABC version 0.20.12 is now available from:

https://download.bitcoinabc.org/0.20.12/

This release includes the following features and fixes:

• The unloadwallet RPC is now synchronous, meaning that it blocks until the
  wallet is fully unloaded.
• Fixed a bug where wallet handles were not being freed correctly, effectively causing
  a memory leak when many wallets were called via loadwallet and unloadwallet.
• Better error reporting for parsing errors in configuration files.

0.20.11

Bitcoin ABC version 0.20.11 is now available from:

https://download.bitcoinabc.org/0.20.11/

This release includes the following features and fixes:

• The prioritisetransaction RPC no longer takes a priority_delta argument,
  which is replaced by a dummy argument for backwards compatibility with
  clients using positional arguments. The RPC is still used to change the
  apparent fee-rate of the transaction by using the fee_delta argument.
• Bare multisig outputs to our keys are no longer automatically treated as
  incoming payments. As this feature was only available for multisig outputs for
  which you had all private keys in your wallet, there was generally no use for
  them compared to single-key schemes. Furthermore, no address format for such
  outputs is defined, and wallet software can't easily send to it. These outputs
  will no longer show up in listtransactions, listunspent, or contribute to
  your balance, unless they are explicitly watched (using importaddress or
  importmulti with hex script argument). signrawtransaction* also still
  works for them.
• The RPC createwallet now has an optional blank argument that can be used
  to create a blank wallet. Blank wallets do not have any keys or HD seed.
  They cannot be opened in software older than 0.20.11
  Once a blank wallet has a HD seed set (by using sethdseed) or private keys,
  scripts, addresses, and other watch only things have been imported, the wallet
  is no longer blank and can be opened in 0.20.x.
  Encrypting a blank wallet will also set a HD seed for it.

0.20.10

Bitcoin ABC version 0.20.10 is now available from:

https://download.bitcoinabc.org/0.20.10/

This release includes the following features and fixes:

• Remove deprecated "startingpriority" and "currentpriority" from
  getrawmempool, getmempoolancestors, getmempooldescendants and
  getmempoolentry RPC.

0.20.9

Bitcoin ABC version 0.20.9 is now available from:

https://download.bitcoinabc.org/0.20.9/

This release includes the following features and fixes:

• Fixed a bug with Multiwallets that have their own directories (i.e. cases
  such as DATADIR/wallets/mywallet/wallet.dat). Backups of these wallets
  will now take each wallet's specific directory into account.
• When transactions are rejected for being low fee, the error message will
  read "min relay fee not met" instead of "insufficient priority". Also,
  a bug was fixed where sometimes low fee transactions would be accepted via
  sendrawtransaction (and be stuck semipermanently, as they would be unable
  to relay to miners).
• Added nTx return value to getblock and getblockheader detailing the
  number of transactions in the returned block.

0.20.8

Bitcoin ABC version 0.20.8 is now available from:

https://download.bitcoinabc.org/0.20.8/

This release includes the following features and fixes:

• When running bitcoind without -daemon, logging to stdout is now the
  default behavior. Setting -printtoconsole=1 no longer implicitly disables
  logging to debug.log. Instead, logging to file can be explicitly disabled by
  setting -debuglogfile=0.
• getlabeladdress has been removed and replaced with getaccountaddress
  until v0.21 at which time getaccountaddress will also be removed. To
  use getaccountaddress start bitcoind with the -deprecatedrpc=accounts
  option. See the v0.20.6 release notes for more details.

Network

• When fetching a transaction announced by multiple peers, previous versions of
  Bitcoin ABC would sequentially attempt to download the transaction from each
  announcing peer until the transaction is received, in the order that those
  peers' announcements were received. In this release, the download logic has
  changed to randomize the fetch order across peers and to prefer sending
  download requests to outbound peers over inbound peers. This fixes an issue
  where inbound peers can prevent a node from getting a transaction.

Seeder

• bitcoin-seeder no longer takes single letter parameter names. Please use
  the full length parameter names. See bitcoin-seeder -? for more
  information.
• If the -?, -h, or -help options are used, bitcoin-seeder will now
  output its help message and then cease operation.
• bitcoin-seeder can now be run on regtest using -regtest. See
  bitcoin-seeder -? --help-debug for more information about the -regtest
  option.
• If options are given to bitcoin-seeder that are not recognizable it will
  output an error and then cease operation.

0.20.7

Bitcoin ABC version 0.20.7 is now available from:

https://download.bitcoinabc.org/0.20.7/

This release includes the following features and fixes:

• The new RPC scantxoutset can be used to scan the UTXO set for entries
  that match certain output descriptors. Refer to the output descriptors
  reference documentation for more details. This call
  is similar to listunspent but does not use a wallet, meaning that the
  wallet can be disabled at compile or run time. This call is experimental,
  as such, is subject to changes or removal in future releases.
• The new RPC getzmqnotifications returns information about active ZMQ
  notifications.

0.20.6

Bitcoin ABC version 0.20.6 is now available from:

https://download.bitcoinabc.org/0.20.6/

This release includes the following features and fixes:

• hdmasterkeyid in getwalletinfo has been deprecated in favor of
  hdseedid. hdmasterkeyid will be removed in V0.21.
• hdmasterkeyid in getaddressinfo has been deprecated in favor of
  hdseedid. hdmasterkeyid will be removed in V0.21.
• The inactivehdmaster property in the dumpwallet output has been
  deprecated in favor of inactivehdseed. inactivehdmaster will be removed
  in V0.21.
• Building from source now requires python 3.5 or greater

'label' and 'account' APIs for wallet

A new 'label' API has been introduced for the wallet. This is intended as a
replacement for the deprecated 'account' API. The 'account' can continue to
be used in v0.20 by starting bitcoind with the '-deprecatedrpc=accounts'
argument, and will be fully removed in v0.21.

The label RPC methods mirror the account functionality, with the following functional differences:

• Labels can be set on any address, not just receiving addresses. This functionality was previously only available through the GUI.
• Labels can be deleted by reassigning all addresses using the setlabel RPC method.
• There isn't support for sending transactions from a label, or for determining which label a transaction was sent from.
• Labels do not have a balance.

Here are the changes to RPC methods:

Deprecated Method	New Method	Notes
getaccount	getaddressinfo	getaddressinfo returns a json object with address information instead of just the name of the account as a string.
getaccountaddress	getlabeladdress	getlabeladdress throws an error by default if the label does not already exist, but provides a force option for compatibility with existing applications.
getaddressesbyaccount	getaddressesbylabel	getaddressesbylabel returns a json object with the addresses as keys, instead of a list of strings.
getreceivedbyaccount	getreceivedbylabel	no change in behavior
listaccounts	listlabels	listlabels does not return a balance or accept minconf and watchonly arguments.
listreceivedbyaccount	listreceivedbylabel	Both methods return new label fields, along with account fields for backward compatibility.
move	n/a	no replacement
sendfrom	n/a	no replacement
setaccount	setlabel	Both methods now: allow assigning labels to any address, instead of raising an error if the address is not receiving address. delete the previous label associated with an address when the final address using that label is reassigned to a different label, instead of making an implicit getaccountaddress call to ensure the previous label still has a receiving address.

Changed Method	Notes
addmultisigaddress	Renamed account named parameter to label. Still accepts account for backward compatibility if running with '-deprecatedrpc=accounts'.
getnewaddress	Renamed account named parameter to label. Still accepts account for backward compatibility. if running with '-deprecatedrpc=accounts'
listunspent	Returns new label fields. account field will be returned for backward compatibility if running with '-deprecatedrpc=accounts'
sendmany	The account named parameter has been renamed to dummy. If provided, the dummy parameter must be set to the empty string, unless running with the -deprecatedrpc=accounts argument (in which case functionality is unchanged).
listtransactions	The account named parameter has been renamed to dummy. If provided, the dummy parameter must be set to the string *, unless running with the -deprecatedrpc=accounts argument (in which case functionality is unchanged).
getbalance	account, minconf and include_watchonly parameters are deprecated, and can only be used if running with '-deprecatedrpc=accounts'

0.20.5

Bitcoin ABC version 0.20.5 is now available from:

https://download.bitcoinabc.org/0.20.5/

This release includes the following features and fixes:

• It is now possible to unload wallets dynamically at runtime. This feature is
  currently only available through the RPC interface.

GUI changes

• Wallets loaded dynamically through the RPC interface may now be displayed in
  the bitcoin-qt GUI.
• The default wallet will now be labeled [default wallet] in the bitcoin-qt
  GUI if no name is provided by the -wallet option on start up.
• Wallets dynamically unloaded will now be reflected in the gui.
• Block storage can be limited under Preferences, in the Main tab. Undoing
  this setting requires downloading the full blockchain again. This mode is
  incompatible with -txindex and -rescan.

0.20.4

Bitcoin ABC version 0.20.4 is now available from:

https://download.bitcoinabc.org/0.20.4/

This release includes the following features and fixes:

• Minor bug fixes and improvements.
• New fees field introduced in getrawmempool, getmempoolancestors,
  getmempooldescendants and getmempoolentry when verbosity is set to
  true with sub-fields ancestor, base, modified and descendant
  denominated in BCH. This new field deprecates previous fee fields, such a
  fee, modifiedfee, ancestorfee and descendantfee.

Dynamic creation of wallets

• Previously, wallets could only be loaded or created at startup, by
  specifying -wallet parameters on the command line or in the bitcoin.conf
  file. It is now possible to create wallets dynamically at runtime:

• New wallets can be created (and loaded) by calling the createwallet RPC.
  The provided name must not match a wallet file in the walletdir directory
  or the name of a wallet that is currently loaded.

• This feature is currently only available through the RPC interface.

0.20.3

Bitcoin ABC version 0.20.3 is now available from:

https://download.bitcoinabc.org/0.20.3/

This release includes the following features and fixes:

• Minor bug fixes and improvements.