Allow getbalance to return in sats

app/cli/src/main/scala/org/bitcoins/cli/ConsoleCli.scala

@@ -91,8 +91,18 @@ object ConsoleCli {
         ),
       cmd("getbalance")
         .hidden()
-        .action((_, conf) => conf.copy(command = GetBalance))
+        .action((_, conf) => conf.copy(command = GetBalance(false)))
-        .text("Get the wallet balance"),
+        .text("Get the wallet balance")
+        .children(
+          opt[Unit]("sats")
+            .required()
+            .action((_, conf) =>
+              conf.copy(command = conf.command match {
+                case getBalance: GetBalance =>
+                  getBalance.copy(isSats = true)
+                case other => other
+              }))
+        ),
       cmd("getnewaddress")
         .hidden()
         .action((_, conf) => conf.copy(command = GetNewAddress))
@@ -230,8 +240,8 @@ object ConsoleCli {
     }
 
     val requestParam: RequestParam = config.command match {
-      case GetBalance =>
+      case GetBalance(isSats) =>
-        RequestParam("getbalance")
+        RequestParam("getbalance", Seq(up.writeJs(isSats)))
       case GetNewAddress =>
         RequestParam("getnewaddress")
       case Rescan(addressBatchSize, startBlock, endBlock, force) =>
@@ -358,7 +368,7 @@ object CliCommand {
   case class SendToAddress(destination: BitcoinAddress, amount: Bitcoins)
       extends CliCommand
   case object GetNewAddress extends CliCommand
-  case object GetBalance extends CliCommand
+  case class GetBalance(isSats: Boolean) extends CliCommand
 
   // Node
   case object GetPeers extends CliCommand

app/picklers/src/main/scala/org/bitcoins/picklers/Picklers.scala

@@ -1,7 +1,7 @@
 package org.bitcoins
 
 import org.bitcoins.core.protocol.{BitcoinAddress, BlockStamp}
-import org.bitcoins.core.currency.Bitcoins
+import org.bitcoins.core.currency.{Bitcoins, Satoshis}
 import org.bitcoins.core.protocol.transaction.Transaction
 import org.bitcoins.core.psbt.PSBT
 import upickle.default._

app/server-test/src/test/scala/org/bitcoins/server/RoutesSpec.scala

@@ -198,11 +198,26 @@ class RoutesSpec
         .returning(Future.successful(Bitcoins(50)))
 
       val route =
-        walletRoutes.handleCommand(ServerCommand("getbalance", Arr()))
+        walletRoutes.handleCommand(
+          ServerCommand("getbalance", Arr(Bool(false))))
 
       Get() ~> route ~> check {
         contentType shouldEqual `application/json`
-        responseAs[String] shouldEqual """{"result":50,"error":null}"""
+        responseAs[String] shouldEqual """{"result":"50.00000000 BTC","error":null}"""
+      }
+    }
+
+    "return the wallet's balance in sats" in {
+      (mockWalletApi.getBalance: () => Future[CurrencyUnit])
+        .expects()
+        .returning(Future.successful(Bitcoins(50)))
+
+      val route =
+        walletRoutes.handleCommand(ServerCommand("getbalance", Arr(Bool(true))))
+
+      Get() ~> route ~> check {
+        contentType shouldEqual `application/json`
+        responseAs[String] shouldEqual """{"result":"5000000000 sats","error":null}"""
       }
     }
 

app/server/src/main/scala/org/bitcoins/server/ServerJsonModels.scala

@@ -17,6 +17,18 @@ object ServerCommand {
   implicit val rw: ReadWriter[ServerCommand] = macroRW
 }
 
+case class GetBalance(isSats: Boolean)
+
+object GetBalance extends ServerJsonModels {
+
+  def fromJsArr(jsArr: ujson.Arr): Try[GetBalance] = {
+    require(jsArr.arr.size == 1,
+            s"Bad number of arguments: ${jsArr.arr.size}. Expected: 1")
+
+    Try(GetBalance(jsArr.arr.head.bool))
+  }
+}
+
 case class CombinePSBTs(psbts: Seq[PSBT])
 
 object CombinePSBTs extends ServerJsonModels {

app/server/src/main/scala/org/bitcoins/server/WalletRoutes.scala

@@ -20,14 +20,24 @@ case class WalletRoutes(wallet: UnlockedWalletApi, node: Node)(
   implicit val materializer = ActorMaterializer()
 
   def handleCommand: PartialFunction[ServerCommand, StandardRoute] = {
-    case ServerCommand("getbalance", _) =>
+    case ServerCommand("getbalance", arr) =>
+      GetBalance.fromJsArr(arr) match {
+        case Failure(exception) =>
+          reject(ValidationRejection("failure", Some(exception)))
+        case Success(GetBalance(isSats)) =>
           complete {
             wallet.getBalance().map { balance =>
               Server.httpSuccess(
-            Bitcoins(balance.satoshis)
+                if (isSats) {
+                  balance.satoshis.toString
+                } else {
+                  Bitcoins(balance.satoshis).toString
+                }
               )
             }
           }
+      }
+
     case ServerCommand("getnewaddress", _) =>
       complete {
         wallet.getNewAddress().map { address =>