listen to new transaction using blockchain abstraction instead of txlistener

src/app/ui/txLogger.js

@@ -164,7 +164,7 @@ class TxLogger {
       }
     })
 
-    this.txListener.event.register('newTransaction', (tx, receipt) => {
+    blockchain.event.register('newTransaction', (tx, receipt) => {
       log(this, tx, receipt)
     })
 

src/blockchain/blockchain.js

@@ -266,7 +266,10 @@ class Blockchain {
   }
 
   startListening (txlistener) {
-    this.udapp.startListening(txlistener)
+    txlistener.event.register('newTransaction', (tx, receipt) => {
+      this.event.emit('newTransaction', tx, receipt)
+      this.udapp.events.emit('newTransaction', tx, receipt) // for plugin backwards compatibility
+    })
   }
 
   runOrCallContractMethod (contractName, contractABI, funABI, value, address, params, lookupOnly, logMsg, logCallback, outputCb, callbacksInContext) {

src/blockchain/universalDapp.js

@@ -33,14 +33,6 @@ class UniversalDApp {
     this.executionContext.event.register('contextChanged', this.resetEnvironment.bind(this))
   }
 
-  // TODO : event should be triggered by Udapp instead of TxListener
-  /** Listen on New Transaction. (Cannot be done inside constructor because txlistener doesn't exist yet) */
-  startListening (txlistener) {
-    txlistener.event.register('newTransaction', (tx) => {
-      this.events.emit('newTransaction', tx)
-    })
-  }
-
   resetEnvironment () {
     this.accounts = {}
     if (this.executionContext.isVM()) {