diff --git a/pool/db.php b/pool/db.php
index e1939f2f..f8764876 100644
--- a/pool/db.php
+++ b/pool/db.php
@@ -174,15 +174,19 @@ function userReg($user, $email, $pass)
 #
 function userSettings($user, $email = null, $addr = null, $pass = null)
 {
+ $tmo = false;
  $flds = array('username' => $user);
  if ($email != null)
 	$flds['email'] = $email;
  if ($addr != null)
+ {
 	$flds['address'] = $addr;
+	$tmo = 3; # 3x the timeout
+ }
  if ($pass != null)
 	$flds['passwordhash'] = myhash($pass);
  $msg = msgEncode('usersettings', 'userset', $flds, $user);
- $rep = sendsockreply('userSettings', $msg);
+ $rep = sendsockreply('userSettings', $msg, $tmo);
  if (!$rep)
 	dbdown();
  return repDecode($rep);
diff --git a/pool/socket.php b/pool/socket.php
index b8da3e8d..08b683e2 100644
--- a/pool/socket.php
+++ b/pool/socket.php
@@ -1,9 +1,26 @@
 <?php
 #
-# See function sendsockreply($fun, $msg) at the end
+# See function sendsockreply($fun, $msg, $tmo) at the end
+#
+function socktmo($socket, $factor)
+{
+ # default timeout factor
+ if ($factor === false)
+	$factor = 1;
+
+ # on a slower server increase this base value
+ $tmo = 2;
+
+ $usetmo = $tmo * $factor;
+ $sec = floor($usetmo);
+ $usec = floor(($usetmo - $sec) * 1000000);
+ $tmoval = array('sec' => $sec, 'usec' => $use);
+ socket_set_option($socket, SOL_SOCKET, SO_SNDTIMEO, $tmo);
+ socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, $tmo);
+}
 #
 # Note that $port in AF_UNIX should be the socket filename
-function _getsock($fun, $port, $unix=true)
+function _getsock($fun, $port, $tmo, $unix=true)
 {
  $socket = null;
  if ($unix === true)
@@ -57,17 +74,15 @@ function _getsock($fun, $port, $unix=true)
 	}
  }
  # Avoid getting locked up for long
- $tmo = array('sec' => 2, 'usec' => 0);
- socket_set_option($socket, SOL_SOCKET, SO_SNDTIMEO, $tmo);
- socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, $tmo);
+ socktmo($socket, $tmo);
  # Enable timeout
  socket_set_block($socket);
  return $socket;
 }
 #
-function getsock($fun)
+function getsock($fun, $tmo)
 {
- return _getsock($fun, '/opt/ckdb/listener');
+ return _getsock($fun, '/opt/ckdb/listener', $tmo);
 }
 #
 function readsockline($fun, $socket)
@@ -161,10 +176,10 @@ function dosend($fun, $socket, $msg)
  return $ret;
 }
 #
-function sendsock($fun, $msg)
+function sendsock($fun, $msg, $tmo = false)
 {
  $ret = false;
- $socket = getsock($fun);
+ $socket = getsock($fun, $tmo);
  if ($socket !== false)
  {
 	$ret = dosend($fun, $socket, $msg);
@@ -178,10 +193,10 @@ function sendsock($fun, $msg)
 # and the data $msg to send to ckdb
 # and it returns $ret = false on error or $ret = the string reply
 #
-function sendsockreply($fun, $msg)
+function sendsockreply($fun, $msg, $tmo = false)
 {
  $ret = false;
- $socket = getsock($fun);
+ $socket = getsock($fun, $tmo);
  if ($socket !== false)
  {
 	$ret = dosend($fun, $socket, $msg);
diff --git a/src/ckdb.h b/src/ckdb.h
index 35d28ac6..e3661bd6 100644
--- a/src/ckdb.h
+++ b/src/ckdb.h
@@ -52,7 +52,7 @@
 
 #define DB_VLOCK "1"
 #define DB_VERSION "0.9.2"
-#define CKDB_VERSION DB_VERSION"-0.513"
+#define CKDB_VERSION DB_VERSION"-0.515"
 
 #define WHERE_FFL " - from %s %s() line %d"
 #define WHERE_FFL_HERE __FILE__, __func__, __LINE__
@@ -1494,6 +1494,7 @@ extern struct CMDS ckdb_cmds[];
 // *** ckdb_btc.c
 // ***
 
+extern bool btc_valid_address(char *addr);
 extern void btc_blockstatus(BLOCKS *blocks);
 
 #endif
diff --git a/src/ckdb_btc.c b/src/ckdb_btc.c
index 8f514fc3..7ede69e5 100644
--- a/src/ckdb_btc.c
+++ b/src/ckdb_btc.c
@@ -20,6 +20,10 @@
 #define GETBLOCK "{\"method\":\"" GETBLOCKCMD "\",\"params\":[\"%s\"],\"id\":1}"
 #define GETBLOCKCONFKEY ((const char *)"confirmations")
 
+#define VALIDADDRCMD "validateaddress"
+#define VALIDADDR "{\"method\":\"" VALIDADDRCMD "\",\"params\":[\"%s\"],\"id\":1}"
+#define VALIDADDRKEY ((const char *)"isvalid")
+
 static char *btc_data(char *json, size_t *len)
 {
 	size_t off;
@@ -234,6 +238,31 @@ static int64_t single_decode_int(char *ans, const char *cmd, const char *key)
 	return val;
 }
 
+static bool single_decode_bool(char *ans, const char *cmd, const char *key)
+{
+	json_t *json_ob;
+	int json_typ;
+	bool val = false;
+
+	json_ob = single_decode(ans, cmd, key);
+	if (json_ob) {
+		json_typ = json_typeof(json_ob);
+		if (json_typ != JSON_TRUE && json_typ != JSON_FALSE) {
+			char *text = safe_text(ans);
+			if (!key)
+				key = BTCKEY;
+			LOGERR("%s() Json %s key %s "
+				"not a bool ans='%s'",
+				__func__, cmd, key, text);
+			free(text);
+		} else {
+			if (json_typ == JSON_TRUE)
+				val = true;
+		}
+	}
+	return val;
+}
+
 static char *btc_blockhash(int32_t height)
 {
 	char buf[1024];
@@ -260,6 +289,19 @@ static int32_t btc_confirms(char *hash)
 	return conf;
 }
 
+bool btc_valid_address(char *addr)
+{
+	char buf[1024];
+	char *ans;
+	bool valid;
+
+	snprintf(buf, sizeof(buf), VALIDADDR, addr);
+	ans = btc_io(VALIDADDRCMD, buf);
+	valid = single_decode_bool(ans, VALIDADDRCMD, VALIDADDRKEY);
+	free(ans);
+	return valid;
+}
+
 // Check for orphan or update confirm count
 void btc_blockstatus(BLOCKS *blocks)
 {
diff --git a/src/ckdb_cmd.c b/src/ckdb_cmd.c
index 3b99a1b8..6c0146dd 100644
--- a/src/ckdb_cmd.c
+++ b/src/ckdb_cmd.c
@@ -240,8 +240,12 @@ static char *cmd_userset(PGconn *conn, char *cmd, char *id,
 				goto struckout;
 			}
 
-//			if (address && *address)
-//				TODO: validate it
+			if (address && *address) {
+				if (!btc_valid_address(address)) {
+					reason = "Invalid BTC address";
+					goto struckout;
+				}
+			}
 
 			if (email && *email) {
 				ok = users_pass_email(conn, u_item, NULL,