diff --git a/lib/solidity/coder.js b/lib/solidity/coder.js
index 59b001f..a0119dd 100644
--- a/lib/solidity/coder.js
+++ b/lib/solidity/coder.js
@@ -219,70 +219,115 @@ SolidityCoder.prototype.decodeParams = function (types, bytes) {
     });
 };
 
+var SolidityTypeAddress = function () {
+    this._name = 'address';
+    this._match = 'strict';
+    this._mode = 'value';
+    this._inputFormatter = f.formatInputInt;
+    this._outputFormatter = f.formatOutputAddress;
+};
+
+SolidityTypeAddress.prototype = new SolidityType({});
+SolidityTypeAddress.prototype.constructor = SolidityTypeAddress;
+
+var SolidityTypeBool = function () {
+    this._name = 'bool';
+    this._match = 'strict';
+    this._mode = 'value';
+    this._inputFormatter = f.formatInputBool;
+    this._outputFormatter = f.formatOutputBool;
+};
+
+SolidityTypeBool.prototype = new SolidityType({});
+SolidityTypeBool.prototype.constructor = SolidityTypeBool;
+
+var SolidityTypeInt = function () {
+    this._name = 'int';
+    this._match = 'prefix';
+    this._mode = 'value';
+    this._inputFormatter = f.formatInputInt;
+    this._outputFormatter = f.formatOutputInt;
+};
+
+SolidityTypeInt.prototype = new SolidityType({});
+SolidityTypeInt.prototype.constructor = SolidityTypeInt;
+
+var SolidityTypeUInt = function () {
+    this._name = 'uint';
+    this._match = 'prefix';
+    this._mode = 'value';
+    this._inputFormatter = f.formatInputInt;
+    this._outputFormatter = f.formatOutputUInt;
+};
+
+SolidityTypeUInt.prototype = new SolidityType({});
+SolidityTypeUInt.prototype.constructor = SolidityTypeUInt;
+
+var SolidityTypeDynamicBytes = function () {
+    this._name = 'bytes';
+    this._match = 'strict';
+    this._mode = 'bytes';
+    this._inputFormatter = f.formatInputDynamicBytes;
+    this._outputFormatter = f.formatOutputDynamicBytes;
+};
+
+SolidityTypeDynamicBytes.prototype = new SolidityType({});
+SolidityTypeDynamicBytes.prototype.constructor = SolidityTypeDynamicBytes;
+
+var SolidityTypeBytes = function () {
+    this._name = 'bytes';
+    this._match = 'prefix';
+    this._mode = 'value';
+    this._inputFormatter = f.formatInputBytes;
+    this._outputFormatter = f.formatOutputBytes;
+};
+
+SolidityTypeBytes.prototype = new SolidityType({});
+SolidityTypeBytes.prototype.constructor = SolidityTypeBytes;
+
+var SolidityTypeString = function () {
+    this._name = 'string';
+    this._match = 'strict';
+    this._mode = 'bytes';
+    this._inputFormatter = f.formatInputString;
+    this._outputFormatter = f.formatOutputString;
+};
+
+SolidityTypeString.prototype = new SolidityType({});
+SolidityTypeString.prototype.constructor = SolidityTypeString;
+
+var SolidityTypeReal = function () {
+    this._name = 'real';
+    this._match = 'prefix';
+    this._mode = 'value';
+    this._inputFormatter = f.formatInputReal;
+    this._outputFormatter = f.formatOutputReal;
+};
+
+SolidityTypeReal.prototype = new SolidityType({});
+SolidityTypeReal.prototype.constructor = SolidityTypeReal;
+
+var SolidityTypeUReal = function () {
+    this._name = 'ureal';
+    this._match = 'prefix';
+    this._mode = 'value';
+    this._inputFormatter = f.formatInputReal;
+    this._outputFormatter = f.formatOutputUReal;
+};
+
+SolidityTypeUReal.prototype = new SolidityType({});
+SolidityTypeUReal.prototype.constructor = SolidityTypeUReal;
+
 var coder = new SolidityCoder([
-    new SolidityType({
-        name: 'address',
-        match: 'strict',
-        mode: 'value',
-        inputFormatter: f.formatInputInt,
-        outputFormatter: f.formatOutputAddress
-    }),
-    new SolidityType({
-        name: 'bool',
-        match: 'strict',
-        mode: 'value',
-        inputFormatter: f.formatInputBool,
-        outputFormatter: f.formatOutputBool
-    }),
-    new SolidityType({
-        name: 'int',
-        match: 'prefix',
-        mode: 'value',
-        inputFormatter: f.formatInputInt,
-        outputFormatter: f.formatOutputInt,
-    }),
-    new SolidityType({
-        name: 'uint',
-        match: 'prefix',
-        mode: 'value',
-        inputFormatter: f.formatInputInt,
-        outputFormatter: f.formatOutputUInt
-    }),
-    new SolidityType({
-        name: 'bytes',
-        match: 'strict',
-        mode: 'bytes',
-        inputFormatter: f.formatInputDynamicBytes,
-        outputFormatter: f.formatOutputDynamicBytes
-    }),
-    new SolidityType({
-        name: 'bytes',
-        match: 'prefix',
-        mode: 'value',
-        inputFormatter: f.formatInputBytes,
-        outputFormatter: f.formatOutputBytes
-    }),
-    new SolidityType({
-        name: 'string',
-        match: 'strict',
-        mode: 'bytes',
-        inputFormatter: f.formatInputString,
-        outputFormatter: f.formatOutputString
-    }),
-    new SolidityType({
-        name: 'real',
-        match: 'prefix',
-        mode: 'value',
-        inputFormatter: f.formatInputReal,
-        outputFormatter: f.formatOutputReal
-    }),
-    new SolidityType({
-        name: 'ureal',
-        match: 'prefix',
-        mode: 'value',
-        inputFormatter: f.formatInputReal,
-        outputFormatter: f.formatOutputUReal
-    })
+    new SolidityTypeAddress(),
+    new SolidityTypeBool(),
+    new SolidityTypeInt(),
+    new SolidityTypeUInt(),
+    new SolidityTypeDynamicBytes(),
+    new SolidityTypeBytes(),
+    new SolidityTypeString(),
+    new SolidityTypeReal(),
+    new SolidityTypeUReal()
 ]);
 
 module.exports = coder;
diff --git a/test/coder.decodeParam.js b/test/coder.decodeParam.js
index ff92fa6..e0dd3fd 100644
--- a/test/coder.decodeParam.js
+++ b/test/coder.decodeParam.js
@@ -32,6 +32,10 @@ describe('lib/solidity/coder', function () {
                                                                    '6761766f66796f726b0000000000000000000000000000000000000000000000'});
         test({ type: 'bytes32', expected: '0x731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b',      
                                                             value: '731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b'});
+        //test({ type: 'bytes64', expected: '0xc3a40000c3a40000000000000000000000000000000000000000000000000000' +
+                                            //'c3a40000c3a40000000000000000000000000000000000000000000000000000',  
+                                                            //value: 'c3a40000c3a40000000000000000000000000000000000000000000000000000' +
+                                                                   //'c3a40000c3a40000000000000000000000000000000000000000000000000000'});
         test({ type: 'bytes', expected: '0x731a3afc00d1b1e3461b955e53fc866dcf303b3eb9f4c16f89e388930f48134b',       
                                                             value: '0000000000000000000000000000000000000000000000000000000000000020' +
                                                                    '0000000000000000000000000000000000000000000000000000000000000020' +