Bitcoin ABC 0.19.7 Release Notes

Bitcoin ABC version 0.19.7 is now available from:

https://download.bitcoinabc.org/0.19.7/

This release includes the following features and fixes:

• -includeconf=<file> can be used to include additional configuration files. Only works inside the bitcoin.conf file, not inside included files or from command-line. Multiple files may be included. Can be disabled from command- line via -noincludeconf. Note that multi-argument commands like -includeconf will override preceding -noincludeconf, i.e. noincludeconf=1 includeconf=relative.conf as bitcoin.conf will still include relative.conf.
• The createrawtransaction RPC will now accept an array or dictionary (kept for compatibility) for the outputs parameter. This means the order of transaction outputs can be specified by the client.
• The new RPC testmempoolaccept can be used to test acceptance of a transaction to the mempool without adding it.
• An initialblockdownload boolean has been added to the getblockchaininfo RPC to indicate whether the node is currently in IBD or not.
• The ‘-usehd’ option has been removed. It is no longer possible to create a non HD wallet.

External wallet files

The -wallet=<path> option now accepts full paths instead of requiring wallets to be located in the -walletdir directory.

Newly created wallet format

If -wallet=<path> is specified with a path that does not exist, it will now create a wallet directory at the specified location (containing a wallet.dat data file, a db.log file, and database/log.?????????? files) instead of just creating a data file at the path and storing log files in the parent directory. This should make backing up wallets more straightforward than before because the specified wallet path can just be directly archived without having to look in the parent directory for transaction log files.

For backwards compatibility, wallet paths that are names of existing data files in the -walletdir directory will continue to be accepted and interpreted the same as before.

Low-level RPC changes

• When bitcoind is not started with any -wallet=<path> options, the name of the default wallet returned by getwalletinfo and listwallets RPCs is now the empty string "" instead of "wallet.dat". If bitcoind is started with any -wallet=<path> options, there is no change in behavior, and the name of any wallet is just its <path> string.

Transaction index changes

The transaction index is now built separately from the main node procedure, meaning the -txindex flag can be toggled without a full reindex. If bitcoind is run with -txindex on a node that is already partially or fully synced without one, the transaction index will be built in the background and become available once caught up. When switching from running -txindex to running without the flag, the transaction index database will not be deleted automatically, meaning it could be turned back on at a later time without a full resync.