diff --git a/remix-lib/index.js b/remix-lib/index.js
index 2a7290e68c..a691fed221 100644
--- a/remix-lib/index.js
+++ b/remix-lib/index.js
@@ -23,6 +23,7 @@ var txHelper = require('./src/execution/txHelper')
 var txFormat = require('./src/execution/txFormat')
 var txListener = require('./src/execution/txListener')
 var executionContext = require('./src/execution/execution-context')
+var typeConversion = require('./src/execution/typeConversion')
 
 if (typeof (module) !== 'undefined' && typeof (module.exports) !== 'undefined') {
   module.exports = modules()
@@ -63,7 +64,8 @@ function modules () {
       txHelper: txHelper,
       executionContext: executionContext,
       txFormat: txFormat,
-      txListener: txListener
+      txListener: txListener,
+      typeConversion: typeConversion
     }
   }
 }
diff --git a/remix-lib/src/execution/typeConversion.js b/remix-lib/src/execution/typeConversion.js
new file mode 100644
index 0000000000..1b5d879fc3
--- /dev/null
+++ b/remix-lib/src/execution/typeConversion.js
@@ -0,0 +1,42 @@
+'use strict'
+var ethJSUtil = require('ethereumjs-util')
+var BN = ethJSUtil.BN
+
+module.exports = {
+  toInt: (h) => {
+    if (h.indexOf && h.indexOf('0x') === 0) {
+      return (new BN(h.replace('0x', ''), 16)).toString(10)
+    } else if (h.constructor && h.constructor.name === 'BigNumber' || BN.isBN(h)) {
+      return h.toString(10)
+    }
+    return h
+  },
+  stringify: stringify
+}
+
+function stringify (v) {
+  try {
+    if (v instanceof Array) {
+      var ret = []
+      for (var k in v) {
+        ret.push(stringify(v[k]))
+      }
+      return ret
+    } else if (BN.isBN(v) || (v.constructor && v.constructor.name === 'BigNumber')) {
+      return v.toString(10)
+    } else if (v._isBuffer) {
+      return ethJSUtil.bufferToHex(v)
+    } else if (typeof v === 'object') {
+      var retObject = {}
+      for (var i in v) {
+        retObject[i] = stringify(v[i])
+      }
+      return retObject
+    } else {
+      return v
+    }
+  } catch (e) {
+    console.log(e)
+    return v
+  }
+}