1 files changed, 29 insertions, 6 deletions
diff --git a/lib/abi.js b/lib/abi.js
index 319b06066..72001eaa0 100644
--- a/lib/abi.js
+++ b/lib/abi.js
@@ -116,6 +116,13 @@ var formatInputBool = function (value) {
     return '000000000000000000000000000000000000000000000000000000000000000' + (value ?  '1' : '0');
 };
 
+/// Formats input value to byte representation of real
+/// Values are multiplied by 2^m and encoded as integers
+/// @returns byte representation of real
+var formatInputReal = function (value) {
+    return formatInputInt(new BigNumber(value).times(new BigNumber(2).pow(128))); 
+};
+
 var dynamicTypeBytes = function (type, value) {
     // TODO: decide what to do with array of strings
     if (arrayType(type) || prefixedType('string')(type))
@@ -132,8 +139,8 @@ var setupInputTypes = function () {
         { type: prefixedType('int'), format: formatInputInt },
         { type: prefixedType('hash'), format: formatInputInt },
         { type: prefixedType('string'), format: formatInputString }, 
-        { type: prefixedType('real'), format: formatInputInt },
-        { type: prefixedType('ureal'), format: formatInputInt },
+        { type: prefixedType('real'), format: formatInputReal },
+        { type: prefixedType('ureal'), format: formatInputReal },
         { type: namedType('address'), format: formatInputInt },
         { type: namedType('bool'), format: formatInputBool }
     ];
@@ -186,13 +193,19 @@ var toAbiInput = function (json, methodName, params) {
     return bytes;
 };
 
+/// Check if input value is negative
+/// @param value is hex format
+/// @returns true if it is negative, otherwise false
+var signedIsNegative = function (value) {
+    return (new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1)) === '1';
+};
+
 /// Formats input right-aligned input bytes to int
 /// @returns right-aligned input bytes formatted to int
 var formatOutputInt = function (value) {
     // check if it's negative number
     // it it is, return two's complement
-    var firstBit = new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1);
-    if (firstBit === '1') {
+    if (signedIsNegative(value)) {
         return new BigNumber(value, 16).minus(new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)).minus(1);
     }
     return new BigNumber(value, 16);
@@ -204,6 +217,16 @@ var formatOutputUInt = function (value) {
     return new BigNumber(value, 16);
 };
 
+/// @returns input bytes formatted to real
+var formatOutputReal = function (value) {
+    return formatOutputInt(value).dividedBy(new BigNumber(2).pow(128)); 
+};
+
+/// @returns input bytes formatted to ureal
+var formatOutputUReal = function (value) {
+    return formatOutputUInt(value).dividedBy(new BigNumber(2).pow(128)); 
+};
+
 /// @returns right-aligned input bytes formatted to hex
 var formatOutputHash = function (value) {
     return "0x" + value;
@@ -239,8 +262,8 @@ var setupOutputTypes = function () {
         { type: prefixedType('int'), format: formatOutputInt },
         { type: prefixedType('hash'), format: formatOutputHash },
         { type: prefixedType('string'), format: formatOutputString },
-        { type: prefixedType('real'), format: formatOutputInt },
-        { type: prefixedType('ureal'), format: formatOutputInt },
+        { type: prefixedType('real'), format: formatOutputReal },
+        { type: prefixedType('ureal'), format: formatOutputUReal },
         { type: namedType('address'), format: formatOutputAddress },
         { type: namedType('bool'), format: formatOutputBool }
     ];