refactor some unnecessary if/else conditions

src/blockchain/blockchain.js

@@ -268,7 +268,9 @@ class Blockchain {
   runOrCallContractMethod (contractName, contractAbi, funABI, value, address, callType, lookupOnly, logMsg, logCallback, outputCb, confirmationCb, continueCb, promptCb) {
     // contractsDetails is used to resolve libraries
     txFormat.buildData(contractName, contractAbi, {}, false, funABI, callType, (error, data) => {
-      if (!error) {
+      if (error) {
+        return logCallback(`${logMsg} errored: ${error} `)
+      }
       if (!lookupOnly) {
         logCallback(`${logMsg} pending ... `)
       } else {
@@ -276,26 +278,21 @@ class Blockchain {
       }
       if (funABI.type === 'fallback') data.dataHex = value
       this.callFunction(address, data, funABI, confirmationCb, continueCb, promptCb, (error, txResult) => {
-          if (!error) {
+        if (error) {
+          return logCallback(`${logMsg} errored: ${error} `)
+        }
         const isVM = this.executionContext.isVM()
         if (isVM) {
           const vmError = txExecution.checkVMError(txResult)
           if (vmError.error) {
-                logCallback(`${logMsg} errored: ${vmError.message} `)
-                return
+            return logCallback(`${logMsg} errored: ${vmError.message} `)
           }
         }
         if (lookupOnly) {
           const returnValue = (this.executionContext.isVM() ? txResult.result.execResult.returnValue : ethJSUtil.toBuffer(txResult.result))
           outputCb(returnValue)
         }
-          } else {
-            logCallback(`${logMsg} errored: ${error} `)
-          }
       })
-      } else {
-        logCallback(`${logMsg} errored: ${error} `)
-      }
     },
     (msg) => {
       logCallback(msg)
@@ -380,21 +377,20 @@ class Blockchain {
   }
 
   newAccount (_password, passwordPromptCb, cb) {
-    if (!this.executionContext.isVM()) {
-      if (!this.config.get('settings/personal-mode')) {
-        return cb('Not running in personal mode')
-      }
-      passwordPromptCb((passphrase) => {
-        this.executionContext.web3().personal.newAccount(passphrase, cb)
-      })
-    } else {
+    if (this.executionContext.isVM()) {
       let privateKey
       do {
         privateKey = crypto.randomBytes(32)
       } while (!isValidPrivate(privateKey))
       this._addAccount(privateKey, '0x56BC75E2D63100000')
-      cb(null, '0x' + privateToAddress(privateKey).toString('hex'))
+      return cb(null, '0x' + privateToAddress(privateKey).toString('hex'))
+    }
+    if (!this.config.get('settings/personal-mode')) {
+      return cb('Not running in personal mode')
     }
+    passwordPromptCb((passphrase) => {
+      this.executionContext.web3().personal.newAccount(passphrase, cb)
+    })
   }
 
   /** Add an account to the list of account (only for Javascript VM) */
@@ -429,8 +425,7 @@ class Blockchain {
         case 'vm': {
           if (!this.accounts) {
             if (cb) cb('No accounts?')
-            reject('No accounts?')
-            return
+            return reject('No accounts?')
           }
           if (cb) cb(null, Object.keys(this.accounts))
           resolve(Object.keys(this.accounts))
@@ -468,37 +463,33 @@ class Blockchain {
     address = stripHexPrefix(address)
 
     if (!this.executionContext.isVM()) {
-      this.executionContext.web3().eth.getBalance(address, (err, res) => {
+      return this.executionContext.web3().eth.getBalance(address, (err, res) => {
         if (err) {
-          cb(err)
-        } else {
-          cb(null, res.toString(10))
+          return cb(err)
         }
+        cb(null, res.toString(10))
       })
-    } else {
+    }
     if (!this.accounts) {
       return cb('No accounts?')
     }
 
     this.executionContext.vm().stateManager.getAccount(Buffer.from(address, 'hex'), (err, res) => {
       if (err) {
-          cb('Account not found')
-        } else {
-          cb(null, new BN(res.balance).toString(10))
+        return cb('Account not found')
       }
+      cb(null, new BN(res.balance).toString(10))
     })
   }
-  }
 
   /** Get the balance of an address, and convert wei to ether */
   getBalanceInEther (address, callback) {
     this.getBalance(address, (error, balance) => {
       if (error) {
-        callback(error)
-      } else {
+        return callback(error)
+      }
       // callback(null, this.executionContext.web3().fromWei(balance, 'ether'))
       callback(null, Web3.utils.fromWei(balance.toString(10), 'ether'))
-      }
     })
   }