diff --git a/ngcp/api_client.lua b/ngcp/api_client.lua
index ee55da7..15d144f 100644
--- a/ngcp/api_client.lua
+++ b/ngcp/api_client.lua
@@ -22,7 +22,7 @@ local NGCPAPIClient = {
      __class__ = 'NGCPAPIClient'
 }
 
-require('curl')
+local curl = require 'curl'
 local utils = require 'ngcp.utils'
 local utable = utils.table
 _ENV = NGCPAPIClient
@@ -83,7 +83,7 @@ function NGCPAPIClient:request(method, request)
     self.c:setopt(curl.OPT_CUSTOMREQUEST, method)
     self.c:setopt(curl.OPT_HTTPHEADER, headers)
 
-    local res, msg =  self.c:perform()
+    self.c:perform()
 
     if curl.close then
        self.c:close()
diff --git a/ngcp/cp.lua b/ngcp/cp.lua
index 7eabc20..cfff867 100644
--- a/ngcp/cp.lua
+++ b/ngcp/cp.lua
@@ -79,9 +79,15 @@ NGCPContractPrefs_MT.__tostring = function ()
         end
 
         local con = self.config:getDBConnection()
-        local query = string.format("SELECT location_id FROM provisioning.voip_contract_locations cl JOIN provisioning.voip_contract_location_blocks cb ON cb.location_id = cl.id WHERE cl.contract_id = %s AND _ipv4_net_from <= UNHEX(HEX(INET_ATON('%s'))) AND _ipv4_net_to >= UNHEX(HEX(INET_ATON('%s'))) ORDER BY cb.ip DESC, cb.mask DESC LIMIT 1", contract, ip, ip)
+        local query = string.format("SELECT location_id FROM provisioning.voip_contract_locations cl JOIN " ..
+            "provisioning.voip_contract_location_blocks cb ON cb.location_id = cl.id WHERE cl.contract_id = %s " ..
+            "AND _ipv4_net_from <= UNHEX(HEX(INET_ATON('%s'))) AND _ipv4_net_to >= UNHEX(HEX(INET_ATON('%s'))) " ..
+            "ORDER BY cb.ip DESC, cb.mask DESC LIMIT 1", contract, ip, ip)
         if string.find(ip, ':') ~= nil then
-            query = string.format("SELECT location_id FROM provisioning.voip_contract_locations cl JOIN provisioning.voip_contract_location_blocks cb ON cb.location_id = cl.id WHERE cl.contract_id = %s AND _ipv6_net_from <= UNHEX(HEX(INET_ATON('%s'))) AND _ipv6_net_to >= UNHEX(HEX(INET_ATON('%s'))) ORDER BY cb.ip DESC, cb.mask DESC LIMIT 1", contract, ip, ip)
+            query = string.format("SELECT location_id FROM provisioning.voip_contract_locations cl JOIN " ..
+                "provisioning.voip_contract_location_blocks cb ON cb.location_id = cl.id WHERE cl.contract_id = %s " ..
+                "AND _ipv6_net_from <= UNHEX(HEX(INET_ATON('%s'))) AND _ipv6_net_to >= UNHEX(HEX(INET_ATON('%s'))) " ..
+                "ORDER BY cb.ip DESC, cb.mask DESC LIMIT 1", contract, ip, ip)
         end
 
         local cur,err = con:execute(query)
@@ -104,11 +110,13 @@ NGCPContractPrefs_MT.__tostring = function ()
     function NGCPContractPrefs:_load(level, contract, ip)
         local con = self.config:getDBConnection()
         local location_id = nil
-        local query = string.format("SELECT * FROM %s WHERE uuid ='%s' AND location_id IS NULL", self.db_table, contract)
+        local query = string.format("SELECT * FROM %s WHERE uuid ='%s' AND location_id IS NULL",
+            self.db_table, contract)
         if ip then
             location_id = self:_get_location_id(contract, ip)
             if location_id then
-                query = string.format("SELECT * FROM %s WHERE uuid ='%s' AND location_id = %d", self.db_table, contract, location_id)
+                query = string.format("SELECT * FROM %s WHERE uuid ='%s' AND location_id = %d",
+                    self.db_table, contract, location_id)
             end
         end
         local cur = con:execute(query)
diff --git a/ngcp/dlgcnt.lua b/ngcp/dlgcnt.lua
index cf93da5..e246f60 100644
--- a/ngcp/dlgcnt.lua
+++ b/ngcp/dlgcnt.lua
@@ -133,7 +133,8 @@ end
         end
         local num = self.pair:lrem(callid, 1, key);
         if num == 0 then
-            sr.log("dbg", string.format("pair:lrem[%s]=>[%s] no such key found in list, skipping decrement", callid, key));
+            sr.log("dbg", string.format("pair:lrem[%s]=>[%s] no such key found in list, skipping decrement",
+                callid, key));
             return false;
         end
         sr.log("dbg", string.format("pair:lrem[%s]=>[%s] %d\n", callid, key, num));
diff --git a/ngcp/fp.lua b/ngcp/fp.lua
index 7c176ec..a60e9b4 100644
--- a/ngcp/fp.lua
+++ b/ngcp/fp.lua
@@ -76,7 +76,8 @@ NGCPFaxPrefs_MT.__tostring = function ()
 
     function NGCPFaxPrefs:_load(level, uuid)
         local con = assert (self.config:getDBConnection())
-        local query = "SELECT fp.* FROM provisioning.voip_fax_preferences fp, provisioning.voip_subscribers s WHERE s.uuid = '" .. uuid .. "' AND fp.subscriber_id = s.id"
+        local query = "SELECT fp.* FROM provisioning.voip_fax_preferences fp, " ..
+            "provisioning.voip_subscribers s WHERE s.uuid = '" .. uuid .. "' AND fp.subscriber_id = s.id"
         local cur = assert (con:execute(query))
         local colnames = cur:getcolnames()
         local keys = {}
diff --git a/ngcp/recentcalls.lua b/ngcp/recentcalls.lua
index 59d3380..1cee119 100644
--- a/ngcp/recentcalls.lua
+++ b/ngcp/recentcalls.lua
@@ -86,7 +86,8 @@ end
         if res then
             self.central:expire(key, self.config.expire)
         end
-        sr.log("info", string.format("central:hset[%s]=>[%s] callid: %s uuid: %s start_time: %s duration: %d caller: %s callee: %s source: %s expire: %d\n",
+        sr.log("info", string.format("central:hset[%s]=>[%s] callid: %s uuid: %s " ..
+            "start_time: %s duration: %d caller: %s callee: %s source: %s expire: %d\n",
                                     key, tostring(res),
                                     callid, uuid,
                                     start_time, duration,