Default to testnet.

Use on mainnet is not recommended until extensive testing has been
done, and should be done at your own risk. Run btcwallet with
--mainnet to operate on main Bitcoin network.

cmdmgr.go

@@ -614,10 +614,10 @@ func CreateEncryptedWallet(reply chan []byte, msg *btcjson.Message) {
 	wallets.RUnlock()
 
 	var net btcwire.BitcoinNet
-	if cfg.TestNet3 {
-		net = btcwire.TestNet3
-	} else {
+	if cfg.MainNet {
 		net = btcwire.MainNet
+	} else {
+		net = btcwire.TestNet3
 	}
 	w, err := wallet.NewWallet(wname, desc, []byte(pass), net)
 	if err != nil {

config.go

@@ -45,7 +45,7 @@ type config struct {
 	DataDir     string `short:"D" long:"datadir" description:"Directory to store wallets and transactions"`
 	Username    string `short:"u" long:"username" description:"Username for btcd authorization"`
 	Password    string `short:"P" long:"password" description:"Password for btcd authorization"`
-	TestNet3    bool   `long:"testnet" description:"Use the test network"`
+	MainNet     bool   `long:"mainnet" description:"Use the main Bitcoin network (default testnet3)"`
 }
 
 // btcwalletHomeDir returns an OS appropriate home directory for btcwallet.

sockets.go

@@ -485,10 +485,10 @@ func BtcdHandshake(ws *websocket.Conn) {
 		}
 
 		var walletNetwork btcwire.BitcoinNet
-		if cfg.TestNet3 {
-			walletNetwork = btcwire.TestNet3
-		} else {
+		if cfg.MainNet {
 			walletNetwork = btcwire.MainNet
+		} else {
+			walletNetwork = btcwire.TestNet3
 		}
 
 		correctNetwork <- btcwire.BitcoinNet(fnet) == walletNetwork