ca24edfbc1941ed0a3c9586416dae4e84794eb66 walletdb: Handle cursor internally (Andrew Chow)
Pull request description:
Instead of returning a Dbc (BDB cursor object) and having the caller deal with the cursor, make BerkeleyBatch handle the cursor internally.
Split from #18971
ACKs for top commit:
ryanofsky:
Code review ACK ca24edfbc1941ed0a3c9586416dae4e84794eb66. Changes since last review: StartCursor rename, moving CloseCursor calls near returns
promag:
Code review ACK ca24edfbc1941ed0a3c9586416dae4e84794eb66.
Tree-SHA512: f029b498c7f275aedca53ce7ade7cb99c82975fd6cad17346a4990fb3bcc54e2a5309b32053bd13def9ee464d331b036ac79abb8fc4fa561170c6cfc85283447
Instead of returning a Dbc (BDB cursor object) and having the caller
deal with the cursor, make BerkeleyBatch handle the cursor internally.
This prepares BerkeleyBatch to work with other database systems as Dbc
objects are BDB specific.
In order to override these later, the specific details of how the Read,
Write, Erase, and Exists functions interact with the actual database
file need to go into functions that are not templated.
