1 files changed, 102 insertions, 0 deletions
diff --git a/ui/app/util.js b/ui/app/util.js
new file mode 100644
index 000000000..4c31e54f4
--- /dev/null
+++ b/ui/app/util.js
@@ -0,0 +1,102 @@
+const ethUtil = require('ethereumjs-util')
+
+var valueTable = {
+  wei:   '1000000000000000000',
+  kwei:  '1000000000000000',
+  mwei:  '1000000000000',
+  gwei:  '1000000000',
+  szabo: '1000000',
+  finney:'1000',
+  ether: '1',
+  kether:'0.001',
+  mether:'0.000001',
+  gether:'0.000000001',
+  tether:'0.000000000001',
+}
+var bnTable = {}
+for (var currency in valueTable) {
+  bnTable[currency] = new ethUtil.BN(valueTable[currency], 10)
+}
+
+module.exports = {
+  valuesFor: valuesFor,
+  addressSummary: addressSummary,
+  numericBalance: numericBalance,
+  formatBalance: formatBalance,
+  dataSize: dataSize,
+  readableDate: readableDate,
+  ethToWei: ethToWei,
+  weiToEth: weiToEth,
+  normalizeToWei: normalizeToWei,
+  valueTable: valueTable,
+  bnTable: bnTable,
+}
+
+
+function valuesFor(obj) {
+  if (!obj) return []
+  return Object.keys(obj)
+    .map(function(key){ return obj[key] })
+}
+
+function addressSummary(address) {
+  return address ? address.slice(0,2+8)+'...'+address.slice(-4) : '...'
+}
+
+// Takes wei Hex, returns wei BN, even if input is null
+function numericBalance(balance) {
+  if (!balance) return new ethUtil.BN(0, 16)
+  var stripped = ethUtil.stripHexPrefix(balance)
+  return new ethUtil.BN(stripped, 16)
+}
+
+// Takes eth BN, returns BN wei
+function ethToWei(bn) {
+  var eth = new ethUtil.BN('1000000000000000000')
+  var wei = bn.mul(eth)
+  return wei
+}
+
+// Takes BN in Wei, returns BN in eth
+function weiToEth(bn) {
+  var diff = new ethUtil.BN('1000000000000000000')
+  var eth = bn.div(diff)
+  return eth
+}
+
+function formatBalance(balance) {
+  if (!balance) return 'None'
+  var wei = numericBalance(balance)
+  var eth = weiToEth(wei)
+  return eth.toString(10) + ' ETH'
+}
+
+function dataSize(data) {
+  var size = data ? ethUtil.stripHexPrefix(data).length : 0
+  return size+' bytes'
+}
+
+// Takes a BN and an ethereum currency name,
+// returns a BN in wei
+function normalizeToWei(amount, currency) {
+  try {
+    var ether = amount.div(bnTable[currency])
+    var wei = ether.mul(bnTable.wei)
+    return wei
+  } catch (e) {}
+  return amount
+}
+
+function readableDate(ms) {
+  var date = new Date(ms)
+  var month = date.getMonth()
+  var day = date.getDate()
+  var year = date.getFullYear()
+  var hours = date.getHours()
+  var minutes = "0" + date.getMinutes()
+  var seconds = "0" + date.getSeconds()
+
+  var date = `${month}/${day}/${year}`
+  var time = `${hours}:${minutes.substr(-2)}:${seconds.substr(-2)}`
+  return `${date} ${time}`
+}