3 files changed, 35 insertions, 3 deletions
diff --git a/app/scripts/inpage.js b/app/scripts/inpage.js
index 7c508c66f..28a1223ac 100644
--- a/app/scripts/inpage.js
+++ b/app/scripts/inpage.js
@@ -54,7 +54,7 @@ var __define
 function cleanContextForImports () {
   __define = global.define
   try {
-    delete global.define
+    global.define = undefined
   } catch (_) {
     console.warn('MetaMask - global.define could not be deleted.')
   }
diff --git a/app/scripts/lib/config-manager.js b/app/scripts/lib/config-manager.js
index 6f5cb3a4a..4d270bcdb 100644
--- a/app/scripts/lib/config-manager.js
+++ b/app/scripts/lib/config-manager.js
@@ -5,6 +5,7 @@ const rp = require('request-promise')
 
 const TESTNET_RPC = MetamaskConfig.network.testnet
 const MAINNET_RPC = MetamaskConfig.network.mainnet
+const txLimit = 40
 
 /* The config-manager is a convenience object
  * wrapping a pojo-migrator.
@@ -15,6 +16,8 @@ const MAINNET_RPC = MetamaskConfig.network.mainnet
  */
 module.exports = ConfigManager
 function ConfigManager (opts) {
+  this.txLimit = txLimit
+
   // ConfigManager is observable and will emit updates
   this._subs = []
 
@@ -181,6 +184,9 @@ ConfigManager.prototype._saveTxList = function (txList) {
 
 ConfigManager.prototype.addTx = function (tx) {
   var transactions = this.getTxList()
+  while (transactions.length > this.txLimit - 1) {
+    transactions.shift()
+  }
   transactions.push(tx)
   this._saveTxList(transactions)
 }
diff --git a/app/scripts/lib/inpage-provider.js b/app/scripts/lib/inpage-provider.js
index b3ed3d9e2..65354cd3d 100644
--- a/app/scripts/lib/inpage-provider.js
+++ b/app/scripts/lib/inpage-provider.js
@@ -33,8 +33,16 @@ function MetamaskInpageProvider (connectionStream) {
   })
   asyncProvider.on('error', console.error.bind(console))
   self.asyncProvider = asyncProvider
-  // overwrite own sendAsync method
-  self.sendAsync = asyncProvider.sendAsync.bind(asyncProvider)
+  // handle sendAsync requests via asyncProvider
+  self.sendAsync = function(payload, cb){
+    // rewrite request ids
+    var request = jsonrpcMessageTransform(payload, (message) => {
+      message.id = createRandomId()
+      return message
+    })
+    // forward to asyncProvider
+    asyncProvider.sendAsync(request, cb)
+  }
 }
 
 MetamaskInpageProvider.prototype.send = function (payload) {
@@ -92,3 +100,21 @@ function remoteStoreWithLocalStorageCache (storageKey) {
 
   return store
 }
+
+function createRandomId(){
+  const extraDigits = 3
+  // 13 time digits
+  const datePart = new Date().getTime() * Math.pow(10, extraDigits)
+  // 3 random digits
+  const extraPart = Math.floor(Math.random() * Math.pow(10, extraDigits))
+  // 16 digits
+  return datePart + extraPart
+}
+
+function jsonrpcMessageTransform(payload, transformFn){
+  if (Array.isArray(payload)) {
+    return payload.map(transformFn)
+  } else {
+    return transformFn(payload)
+  }
+}
+\ No newline at end of file