This change fixes the recently bloated wallet balances api. Now there
is one CLI getbalance [bsq|btc] method that calls a getbalances(currency-code)
on the server. The server returns full wallet balance information for
BSQ, BTC, or both if the CLI's currency argument is absent.
- grpc.proto: Reduced number of getbalance(s) proto services from
four to one.
- GrpcWalletsService: Reduced number of getbalance(s) gRPC service
boilerplate methods from four to one.
- CoreApi, CoreWalletsService: Reduced number of getbalance(s) gRPC
service implementation methods from four to one.
- CliMain: Reduced number of getbalance(s) commands from four to one.
- BalancesInfo: Changed BsqBalanceInfo & BtcBalanceInfo field names
to bsq and btc, respectively, to make calling their accessors
more readable, less verbose.
- BtcBalanceInfo, BsqBalanceInfo: Defined static final EMPTY instances
as place holders in a BalancesInfo returned by the gRPC server, when
one or the other balance types is not requested. Would be nice
to serve Optional.empty() instead, but protobuf does not support
it or null.
- Adjusted affected api tests and build doc.
- Added new method to CLI, split some long msg strings into two lines,
and added a white space after a braceless else statement.
- Added the gRPC server boilerplate.
- Added the core implementation.
- Added a test, and moved method wallet tests into their own package.
