Change Details

``` Currently, if the user calls the savemempool RPC method, there is no way to know where the file was created (unless the user knows internal implementation details). This PR adds a return message stating the file name and path where the mempool was saved and changes mempool_persist.py to validate this new return message. ``` Backport of core#23398.

``` Currently, if the user calls the savemempool RPC method, there is no way to know where the file was created (unless the user knows internal implementation details). This PR adds a return message stating the file name and path where the mempool was saved and changes mempool_persist.py to validate this new return message. ``` Backport of [[https://github.com/bitcoin/bitcoin/pull/23398 | core#23398]].

``` Currently, if the user calls the savemempool RPC method, there is no way to know where the file was created (unless the user knows internal implementation details). This PR adds a return message stating the file name and path where the mempool was saved and changes mempool_persist.py to validate this new return message. ``` Backport of [[https://github.com/bitcoin/bitcoin/pull/23398 | core#23398]].