server.rb

require "grpc"
require "json"
require "helloworld_services_pb"

class LightningRPCServer < Lnservice::Lnd::Service
  # get_wallet_balance implements the SayHello rpc method.
  def get_wallet_balance(wallet_req, _unused_call)
    walletbalance = JSON.parse(`/home/user/.go/bin/lncli walletbalance`)
    puts walletbalance
    Lnservice::WalletBalanceReply.new(wallet_balance: walletbalance)
  end
end