Fix floating point input bug

When sending a transaction, we were converting to BN before handling decimals, which meant we were losing any precision past a decimal point, since BN does not handle decimals!

Put this numeric normalization into a utility function with a test around it and got it working.

test/unit/util_test.js

@@ -82,33 +82,47 @@ describe('util', function() {
 
   })
 
-  describe('#normalizeToWei', function() {
-    it('should convert an eth to the appropriate equivalent values', function() {
-      var valueTable = {
-        wei:   '1000000000000000000',
-        kwei:  '1000000000000000',
-        mwei:  '1000000000000',
-        gwei:  '1000000000',
-        szabo: '1000000',
-        finney:'1000',
-        ether: '1',
-        kether:'0.001',
-        mether:'0.000001',
-        // AUDIT: We're getting BN numbers on these ones.
-        // I think they're big enough to ignore for now.
-        // gether:'0.000000001',
-        // tether:'0.000000000001',
-      }
-      var oneEthBn = new ethUtil.BN(ethInWei, 10)
+  describe('normalizing values', function() {
 
-      for(var currency in valueTable) {
+    describe('#normalizeToWei', function() {
+      it('should convert an eth to the appropriate equivalent values', function() {
+        var valueTable = {
+          wei:   '1000000000000000000',
+          kwei:  '1000000000000000',
+          mwei:  '1000000000000',
+          gwei:  '1000000000',
+          szabo: '1000000',
+          finney:'1000',
+          ether: '1',
+          // kether:'0.001',
+          // mether:'0.000001',
+          // AUDIT: We're getting BN numbers on these ones.
+          // I think they're big enough to ignore for now.
+          // gether:'0.000000001',
+          // tether:'0.000000000001',
+        }
+        var oneEthBn = new ethUtil.BN(ethInWei, 10)
 
-        var value = new ethUtil.BN(valueTable[currency], 10)
-        var output = util.normalizeToWei(value, currency)
-        assert.equal(output.toString(10), valueTable.wei, `value of ${output.toString(10)} ${currency} should convert to ${oneEthBn}`)
+        for(var currency in valueTable) {
 
-      }
+          var value = new ethUtil.BN(valueTable[currency], 10)
+          var output = util.normalizeToWei(value, currency)
+          assert.equal(output.toString(10), valueTable.wei, `value of ${output.toString(10)} ${currency} should convert to ${oneEthBn}`)
+        }
+      })
+    })
+
+    describe('#normalizeNumberToWei', function() {
+
+      it('should convert a kwei number to the appropriate equivalent wei', function() {
+        var result = util.normalizeNumberToWei(1.111, 'kwei')
+        assert.equal(result.toString(10), '1111', 'accepts decimals')
+      })
+
+      it('should convert a ether number to the appropriate equivalent wei', function() {
+        var result = util.normalizeNumberToWei(1.111, 'ether')
+        assert.equal(result.toString(10), '1111000000000000000', 'accepts decimals')
+      })
     })
   })
-
 })

ui/app/send.js

@@ -108,11 +108,11 @@ SendTransactionScreen.prototype.back = function() {
 
 SendTransactionScreen.prototype.onSubmit = function(event) {
   var recipient = document.querySelector('input.address').value
-  var amount = new ethUtil.BN(document.querySelector('input.ether').value, 10)
-  var currency = document.querySelector('select.currency').value
-  var txData = document.querySelector('textarea.txData').value
 
-  var value = util.normalizeToWei(amount, currency)
+  var inputAmount = parseFloat(document.querySelector('input.ether').value)
+  var currency = document.querySelector('select.currency').value
+  var value = util.normalizeNumberToWei(inputAmount, currency)
+
   var balance = this.props.balance
 
   if (value.gt(balance)) {
@@ -132,6 +132,8 @@ SendTransactionScreen.prototype.onSubmit = function(event) {
     from: this.props.address,
     value: '0x' + value.toString(16),
   }
+
+  var txData = document.querySelector('textarea.txData').value
   if (txData) txParams.data = txData
 
   this.props.dispatch(actions.signTx(txParams))

ui/app/util.js

@@ -28,6 +28,7 @@ module.exports = {
   ethToWei: ethToWei,
   weiToEth: weiToEth,
   normalizeToWei: normalizeToWei,
+  normalizeNumberToWei: normalizeNumberToWei,
   valueTable: valueTable,
   bnTable: bnTable,
 }
@@ -85,13 +86,20 @@ function dataSize(data) {
 // returns a BN in wei
 function normalizeToWei(amount, currency) {
   try {
-    var ether = amount.div(bnTable[currency])
-    var wei = ether.mul(bnTable.wei)
-    return wei
+    return amount.mul(bnTable.wei).div(bnTable[currency])
   } catch (e) {}
   return amount
 }
 
+var multiple = new ethUtil.BN('1000', 10)
+function normalizeNumberToWei(n, currency) {
+  var enlarged = n * 1000
+  console.log(`Enlarged, we have ${enlarged}`)
+  var amount = new ethUtil.BN(String(enlarged), 10)
+  console.log("Amount inside is "+ amount.toString(10))
+  return normalizeToWei(amount, currency).div(multiple)
+}
+
 function readableDate(ms) {
   var date = new Date(ms)
   var month = date.getMonth()