btc: add balance events on handle-address-info

pkg/arvo/app/btc-wallet.hoon

@@ -957,6 +957,7 @@
       [cad ah]
     :-  [(poke-provider [%tx-info txid.u]) cad]
     (~(put by ah) txid.u)
+  =.  cards  (snoc cards (give-update %balance current-balance))
   ::  if the wallet+chyg is being scanned, update the scan batch
   ::
   =/  b  (~(get by scans) [xpub.w chyg])

pkg/arvo/lib/bitcoin-json.hoon

@@ -107,6 +107,7 @@
       %new-tx              (hest hest.upd)
       %cancel-tx           (hexb txid.upd)
       %new-address         (address address.upd)
+      %balance             (balance balance.upd)
     ==
   ::
   ++  initial

pkg/arvo/sur/btc-wallet.hoon

@@ -118,7 +118,7 @@
   $%  $:  %initial
         provider=(unit provider)
         wallet=(unit xpub)
-        balance=(unit [p=sats q=sats])
+        balance=(unit [confirmed=sats unconfirmed=sats])
         =history
         =btc-state
         address=(unit address)
@@ -130,6 +130,7 @@
       [%new-tx =hest]
       [%cancel-tx =txid]
       [%new-address =address]
+      [%balance balance=(unit [confirmed=sats unconfirmed=sats])]
   ==
 ::
 +$  condition

pkg/btc-wallet/src/js/reducers/update.js

@@ -33,6 +33,9 @@ export class UpdateReducer {
     if (json.address) {
       this.reduceAddress(json.address, state);
     }
+    if (json.balance) {
+      this.reduceBalance(json.balance, state);
+    }
   }
 
   reduceProviderStatus(json, state) {
@@ -91,4 +94,9 @@ export class UpdateReducer {
   reduceAddress(json, state) {
     state.address = json;
   }
+
+  reduceBalance(json, state) {
+    state.unconfirmedBalance = json.unconfirmed;
+    state.confirmedBalance = json.confirmed;
+  }
 }