Fix issues found by golint and go vet.

cmd.go

@@ -75,6 +75,10 @@ type BtcWallet struct {
 	}
 }
 
+// BtcWalletStore stores all wallets currently being handled by
+// btcwallet.  Wallet are stored in a map with the account name as the
+// key.  A RWMutex is used to protect against incorrect concurrent
+// access.
 type BtcWalletStore struct {
 	sync.RWMutex
 	m map[string]*BtcWallet
@@ -87,10 +91,7 @@ func NewBtcWalletStore() *BtcWalletStore {
 	}
 }
 
-// Rollback reverts each stored BtcWallet to a state before the block
+// Rollback rolls back each BtcWallet saved in the store.
-// with the passed chainheight and block hash was connected to the main
-// chain.  This is used to remove transactions and utxos for each wallet
-// that occured on a chain no longer considered to be the main chain.
 func (s *BtcWalletStore) Rollback(height int64, hash *btcwire.ShaHash) {
 	s.Lock()
 	for _, w := range s.m {
@@ -99,6 +100,10 @@ func (s *BtcWalletStore) Rollback(height int64, hash *btcwire.ShaHash) {
 	s.Unlock()
 }
 
+// Rollback reverts each stored BtcWallet to a state before the block
+// with the passed chainheight and block hash was connected to the main
+// chain.  This is used to remove transactions and utxos for each wallet
+// that occured on a chain no longer considered to be the main chain.
 func (w *BtcWallet) Rollback(height int64, hash *btcwire.ShaHash) {
 	w.UtxoStore.Lock()
 	w.UtxoStore.dirty = w.UtxoStore.dirty || w.UtxoStore.s.Rollback(height, hash)

cmdmgr.go

@@ -310,6 +310,11 @@ func GetBalance(reply chan []byte, msg *btcjson.Message) {
 	}
 }
 
+// GetBalances notifies each attached wallet of the current confirmed
+// and unconfirmed account balances.
+//
+// TODO(jrick): Switch this to return a JSON object (map) of all accounts
+// and their balances, instead of separate notifications for each account.
 func GetBalances(reply chan []byte, msg *btcjson.Message) {
 	wallets.RLock()
 	for _, w := range wallets.m {
@@ -839,7 +844,10 @@ func BtcdConnected(reply chan []byte, msg *btcjson.Message) {
 	ReplySuccess(reply, msg.Id, btcdConnected.b)
 }
 
-// TODO(jrick): move somewhere better so it can be shared with frontends.
+// AccountNtfn is a struct for marshalling any generic notification
+// about a account for a wallet frontend.
+//
+// TODO(jrick): move to btcjson so it can be shared with frontends?
 type AccountNtfn struct {
 	Account      string      `json:"account"`
 	Notification interface{} `json:"notification"`
@@ -860,6 +868,8 @@ func NotifyWalletLockStateChange(account string, locked bool) {
 	frontendNotificationMaster <- msg
 }
 
+// NotifyWalletBalance sends a confirmed account balance notification
+// to a frontend.
 func NotifyWalletBalance(frontend chan []byte, account string, balance float64) {
 	var id interface{} = "btcwallet:accountbalance"
 	m := btcjson.Reply{
@@ -873,6 +883,8 @@ func NotifyWalletBalance(frontend chan []byte, account string, balance float64)
 	frontend <- msg
 }
 
+// NotifyWalletBalanceUnconfirmed  sends a confirmed account balance
+// notification to a frontend.
 func NotifyWalletBalanceUnconfirmed(frontend chan []byte, account string, balance float64) {
 	var id interface{} = "btcwallet:accountbalanceunconfirmed"
 	m := btcjson.Reply{

createtx_test.go

@@ -64,7 +64,7 @@ func TestFakeTxs(t *testing.T) {
 	pairs := map[string]uint64{
 		"17XhEvq9Nahdj7Xe1nv6oRe1tEmaHUuynH": 5000,
 	}
-	rawtx, err := btcw.txToPairs(pairs, 100, 0)
+	rawtx, _, err := btcw.txToPairs(pairs, 100, 0)
 	if err != nil {
 		t.Errorf("Tx creation failed: %s", err)
 		return

sockets.go

@@ -217,7 +217,7 @@ func BtcdHandler(ws *websocket.Conn) {
 		case r := <-btcdMsgs:
 			if err := websocket.Message.Send(ws, r); err != nil {
 				// btcd disconnected.
-				log.Error("Unable to send message to btcd: %v", err)
+				log.Errorf("Unable to send message to btcd: %v", err)
 				return
 			}
 		}