The wallet now only stores Sapling extended spending keys, and thus can
only be used with keys generated from an HDSeed via ZIP 32.
Note that not all Sapling keys in the wallet will correspond to the
wallet's HDSeed, as a standalone Sapling xsk can be imported via
z_importkey. However, it must have been generated from a seed itself,
and thus is more likely to be backed up elsewhere.
Add Sapling support to z_getbalance and z_gettotalbalance
Also includes preparatory changes for various other RPCs that depend on `GetFilteredNotes` etc.
Closes#3214.
Revise help output for z_sendmany
The previous version of the usage message for z_sendmany used the word "Change"
in an ambiguous way.
The intent was to describe "Change" the noun that indicates the portion of a
transaction's funds that are returned to the payer, however the context did not
provide an immediate cue to differentiate from the verb form meaning
"to alter". Indeed, in other help strings in the same file that meaning of the
word is correct, i.e. the verb form is used. Moreover a typo in the form of a
missing "a" later in the same sentence exacerbated the problem, by decreasing
readability precisely where context could reduce confusion.
This could in future be refactored to be generic over PaymentAddress and
NotePlaintext in the return type, but for now let's be explicit about which
returned notes are for Sprout vs Sapling, and handle them separately.
Co-authored-by: Sean Bowe <ewillbefull@gmail.com>
