mintspark {"address":{amount,memo...}}
Mints (privatize/anonymise) transparent balance. The amount is added to the wallet's private balance. Target address can be own wallet's or external wallet's.
spendspark {"address":{amount,subtractfee...}, "address":{amount,memo,subtractfee...}}
Spends private balance (unshields, if to a transparent address. Mints, if to a Spark/private address).Target address can be own wallet's or external wallet's.