fix rate

Author: lyddream

.gitignore

@@ -19,6 +19,7 @@ coverage
 
 # nyc test coverage
 .nyc_output
+test/
 
 # Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
 .grunt

package.json

@@ -1,6 +1,6 @@
 {
   "name": "loopring.js",
-  "version": "2.0.12",
+  "version": "2.0.13",
   "description": "Loopring javascript library",
   "scripts": {
     "lint": "eslint . --fix",

src/common/formatter.js

@@ -4,7 +4,7 @@ import BN from 'bn.js';
 
 BigNumber.config({
     EXPONENTIAL_AT: 20,
-    RANGE: [-20, 10000000],
+    RANGE: [-100000, 10000000],
     ROUNDING_MODE: 1
 });
 /**

src/ethereum/contracts/Contracts.js

@@ -37,11 +37,16 @@ const encodeSubmitRing = (orders, feeRecipient, feeSelections) =>
         feeSelections = orders.map(item => 0);
     }
     const ringHash = getRingHash(orders, feeRecipient, feeSelections);
-    const amounts = orders.map(order => toBig(order.amountS).div(toBig(order.amountB)));
-    const tem = amounts.reduce((total, amount) =>
+
+    let amounts = toBig(1);
+    let amountb = toBig(1);
+
+    orders.forEach(order =>
     {
-        return total.times(amount);
+        amounts = amounts.times(toBig(order.amountS));
+        amountb = amountb.times(toBig(order.amountB));
     });
+    const tem = amounts.div(amountb);
     const rate = Math.pow(toNumber(tem), 1 / orders.length);
     if (rate < 1)
     {