From 0a3a1b5ea6634be11e969eedcfb188fc8d010131 Mon Sep 17 00:00:00 2001
From: sairajzero <sairaj0630@gmail.com>
Date: Mon, 17 Apr 2023 20:07:12 +0530
Subject: [PATCH] changing typeof to equivalent lodash

---
 lib/services/address/index.js     | 4 ++--
 lib/services/block/index.js       | 4 ++--
 lib/services/db/index.js          | 2 +-
 lib/services/transaction/index.js | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/services/address/index.js b/lib/services/address/index.js
index a93b9418..57cc0deb 100644
--- a/lib/services/address/index.js
+++ b/lib/services/address/index.js
@@ -180,7 +180,7 @@ AddressService.prototype.getAddressHistory = function(addresses, options, stream
   //options.from = options.from || 0; //Deprecated, use `after` option
   //options.to = options.to || 0xffffffff; //Deprecated, use `after` option
 
-  if(typeof callback !== 'function'){ //if only 3 args, then streamer is callback
+  if(!_.isFunction(callback)){ //if only 3 args, then streamer is callback
     callback = streamer;
     streamer = () => null; //NULL fn
   }
@@ -319,7 +319,7 @@ AddressService.prototype.getAddressSummary = function(address, options, streamer
     options.queryMempool = true;
   }
 
-  if(typeof callback !== 'function'){ //if only 3 args, then streamer is callback
+  if(!_.isFunction(callback)){ //if only 3 args, then streamer is callback
     callback = streamer;
     streamer = () => null; //NULL fn
   }
diff --git a/lib/services/block/index.js b/lib/services/block/index.js
index cfee8a12..7884260c 100644
--- a/lib/services/block/index.js
+++ b/lib/services/block/index.js
@@ -724,13 +724,13 @@ BlockService.prototype._findLatestValidBlockHeader = function(callback) {
     // if some joker mines a block using an orphan block as its prev block, then the effect of this will be
     // us detecting a reorg, but not actually reorging anything
     // FLOSight Error Correction from RanchiMall 17th May 2021. removed the unhandled assert and replaced by looging of error
- if (typeof header !== 'undefined') {
+ if (!_.isUndefined(header)) {
       if (header == false) { 
         log.error('Block Service: we could not locate any of our recent block hashes in the header service ' + 'index. Perhaps our header service sync\'ed to the wrong chain?');
         }
      }   
     // assert(header, 'Block Service: we could not locate any of our recent block hashes in the header service ' + 'index. Perhaps our header service sync\'ed to the wrong chain?');
-  if (typeof header.height !== 'undefined') {
+  if (!_.isUndefined(header.height)) {
           if (header.height > self._tip.height) { 
           log.error('Block Service: we found a common ancestor header whose ' + 'height was greater than our current tip. This should be impossible.');
           }
diff --git a/lib/services/db/index.js b/lib/services/db/index.js
index 1bcc57ef..b79db2db 100644
--- a/lib/services/db/index.js
+++ b/lib/services/db/index.js
@@ -95,7 +95,7 @@ DB.prototype.get = function(key, options, callback) {
   var cb = callback;
   var opts = options;
 
-  if (typeof callback !== 'function') {
+  if (!_.isFunction(callback)) {
     cb = options;
     opts = {};
   }
diff --git a/lib/services/transaction/index.js b/lib/services/transaction/index.js
index 545046f8..2be34b58 100644
--- a/lib/services/transaction/index.js
+++ b/lib/services/transaction/index.js
@@ -114,7 +114,7 @@ TransactionService.prototype.getTransaction = function(txid, options, callback)
 
   var self = this;
 
-  if (typeof callback !== 'function') {
+  if (!_.isFunction(callback)) {
     callback = options;
   }