cleanErrorStack moved to separate library module

more errors traces cleaned up

app/scripts/controllers/transactions/index.js

@@ -8,6 +8,7 @@ const TxGasUtil = require('./tx-gas-utils')
 const PendingTransactionTracker = require('./pending-tx-tracker')
 const NonceTracker = require('./nonce-tracker')
 const txUtils = require('./lib/util')
+const cleanErrorStack = require('../../lib/cleanErrorStack')
 const log = require('loglevel')
 
 /**
@@ -111,15 +112,6 @@ class TransactionController extends EventEmitter {
     this.txStateManager.wipeTransactions(address)
   }
 
-  /**
-  Returns error without stack trace for better UI display
-  @param {Error} err - error which stack will be cleaned
-  */
-  cleanErrorStack(err){
-    err.stack = err.name + ': ' + err.message
-    return err
-  }
-
   /**
   add a new unapproved transaction to the pipeline
 
@@ -140,11 +132,11 @@ class TransactionController extends EventEmitter {
           case 'submitted':
             return resolve(finishedTxMeta.hash)
           case 'rejected':
-            return reject(this.cleanErrorStack(new Error('MetaMask Tx Signature: User denied transaction signature.')))
+            return reject(cleanErrorStack(new Error('MetaMask Tx Signature: User denied transaction signature.')))
           case 'failed':
-            return reject(this.cleanErrorStack(new Error(finishedTxMeta.err.message)))
+            return reject(cleanErrorStack(new Error(finishedTxMeta.err.message)))
           default:
-            return reject(this.cleanErrorStack(new Error(`MetaMask Tx Signature: Unknown problem: ${JSON.stringify(finishedTxMeta.txParams)}`)))
+            return reject(cleanErrorStack(new Error(`MetaMask Tx Signature: Unknown problem: ${JSON.stringify(finishedTxMeta.txParams)}`)))
         }
       })
     })

app/scripts/lib/cleanErrorStack.js

@@ -0,0 +1,24 @@
+/**
+ * Returns error without stack trace for better UI display
+ * @param {Error} err - error
+ * @returns {Error} Error with clean stack trace.
+ */
+function cleanErrorStack(err){
+  var name = err.name
+  name = (name === undefined) ? 'Error' : String(name)
+
+  var msg = err.message
+  msg = (msg === undefined) ? '' : String(msg)
+
+  if (name === '') {
+    err.stack = err.message
+  } else if (msg === '') {
+    err.stack = err.name
+  } else {
+    err.stack = err.name + ': ' + err.message
+  }
+
+  return err
+}
+
+module.exports = cleanErrorStack

app/scripts/metamask-controller.js

@@ -45,6 +45,7 @@ const BN = require('ethereumjs-util').BN
 const GWEI_BN = new BN('1000000000')
 const percentile = require('percentile')
 const seedPhraseVerifier = require('./lib/seed-phrase-verifier')
+const cleanErrorStack = require('./lib/cleanErrorStack')
 const log = require('loglevel')
 
 module.exports = class MetamaskController extends EventEmitter {
@@ -637,9 +638,9 @@ module.exports = class MetamaskController extends EventEmitter {
         case 'signed':
           return cb(null, data.rawSig)
         case 'rejected':
-          return cb(new Error('MetaMask Message Signature: User denied message signature.'))
+          return cb(cleanErrorStack(new Error('MetaMask Message Signature: User denied message signature.')))
         default:
-          return cb(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`))
+          return cb(cleanErrorStack(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`)))
       }
     })
   }
@@ -697,7 +698,7 @@ module.exports = class MetamaskController extends EventEmitter {
    */
   newUnsignedPersonalMessage (msgParams, cb) {
     if (!msgParams.from) {
-      return cb(new Error('MetaMask Message Signature: from field is required.'))
+      return cb(cleanErrorStack(new Error('MetaMask Message Signature: from field is required.')))
     }
 
     const msgId = this.personalMessageManager.addUnapprovedMessage(msgParams)
@@ -708,9 +709,9 @@ module.exports = class MetamaskController extends EventEmitter {
         case 'signed':
           return cb(null, data.rawSig)
         case 'rejected':
-          return cb(new Error('MetaMask Message Signature: User denied message signature.'))
+          return cb(cleanErrorStack(new Error('MetaMask Message Signature: User denied message signature.')))
         default:
-          return cb(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`))
+          return cb(cleanErrorStack(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`)))
       }
     })
   }
@@ -776,9 +777,9 @@ module.exports = class MetamaskController extends EventEmitter {
         case 'signed':
           return cb(null, data.rawSig)
         case 'rejected':
-          return cb(new Error('MetaMask Message Signature: User denied message signature.'))
+          return cb(cleanErrorStack(new Error('MetaMask Message Signature: User denied message signature.')))
         default:
-          return cb(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`))
+          return cb(cleanErrorStack(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`)))
       }
     })
   }