From d6ed2f67a8cdb07ce7b4eaea93452afb0cdbaa23 Mon Sep 17 00:00:00 2001
From: Wenbiao Zheng <delweng@gmail.com>
Date: Thu, 24 May 2018 20:55:20 +0800
Subject: [PATCH] eth, node, trie: fix minor typos (#16802)

---
 eth/backend.go | 10 +++++-----
 node/doc.go    |  4 ++--
 trie/trie.go   |  2 +-
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/eth/backend.go b/eth/backend.go
index ea70e3826c4e..e07d5efc9a8e 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -215,14 +215,14 @@ func CreateConsensusEngine(ctx *node.ServiceContext, config *ethash.Config, chai
 		return clique.New(chainConfig.Clique, db)
 	}
 	// Otherwise assume proof-of-work
-	switch {
-	case config.PowMode == ethash.ModeFake:
+	switch config.PowMode {
+	case ethash.ModeFake:
 		log.Warn("Ethash used in fake mode")
 		return ethash.NewFaker()
-	case config.PowMode == ethash.ModeTest:
+	case ethash.ModeTest:
 		log.Warn("Ethash used in test mode")
 		return ethash.NewTester()
-	case config.PowMode == ethash.ModeShared:
+	case ethash.ModeShared:
 		log.Warn("Ethash used in shared mode")
 		return ethash.NewShared()
 	default:
@@ -239,7 +239,7 @@ func CreateConsensusEngine(ctx *node.ServiceContext, config *ethash.Config, chai
 	}
 }
 
-// APIs returns the collection of RPC services the ethereum package offers.
+// APIs return the collection of RPC services the ethereum package offers.
 // NOTE, some of these services probably need to be moved to somewhere else.
 func (s *Ethereum) APIs() []rpc.API {
 	apis := ethapi.GetAPIs(s.APIBackend)
diff --git a/node/doc.go b/node/doc.go
index d9688e0a12cb..41a88c19a1ba 100644
--- a/node/doc.go
+++ b/node/doc.go
@@ -59,7 +59,7 @@ using the same data directory will store this information in different subdirect
 the data directory.
 
 LevelDB databases are also stored within the instance subdirectory. If multiple node
-instances use the same data directory, openening the databases with identical names will
+instances use the same data directory, opening the databases with identical names will
 create one database for each instance.
 
 The account key store is shared among all node instances using the same data directory
@@ -84,7 +84,7 @@ directory. Mode instance A opens the database "db", node instance B opens the da
             static-nodes.json  -- devp2p static node list of instance B
             db/                -- LevelDB content for "db"
             db-2/              -- LevelDB content for "db-2"
-        B.ipc                  -- JSON-RPC UNIX domain socket endpoint of instance A
+        B.ipc                  -- JSON-RPC UNIX domain socket endpoint of instance B
         keystore/              -- account key store, used by both instances
 */
 package node
diff --git a/trie/trie.go b/trie/trie.go
index 31a404e3a08f..30543c5496bf 100644
--- a/trie/trie.go
+++ b/trie/trie.go
@@ -101,7 +101,7 @@ func New(root common.Hash, db *Database) (*Trie, error) {
 		db:           db,
 		originalRoot: root,
 	}
-	if (root != common.Hash{}) && root != emptyRoot {
+	if root != (common.Hash{}) && root != emptyRoot {
 		rootnode, err := trie.resolveHash(root[:], nil)
 		if err != nil {
 			return nil, err