add support for funding

lib/admin/funding.js

@@ -0,0 +1,61 @@
+const BN = require('../bn')
+const settingsLoader = require('../settings-loader')
+const configManager = require('../config-manager')
+const wallet = require('../wallet')
+const ticker = require('../ticker')
+const coinUtils = require('../coin-utils')
+
+module.exports = {getFunding}
+
+function computeCrypto (cryptoCode, _balance) {
+  const unitScale = coinUtils.coins[cryptoCode].unitScale
+
+  return BN(_balance).shift(-unitScale).round(5)
+}
+
+function computeFiat (rate, cryptoCode, _balance) {
+  const unitScale = coinUtils.coins[cryptoCode].unitScale
+
+  return BN(_balance).shift(-unitScale).mul(rate).round(5)
+}
+
+function getFunding (cryptoCode) {
+  cryptoCode = cryptoCode || 'BTC'
+  const cryptoDisplays = coinUtils.cryptoDisplays
+
+  if (!coinUtils.coins[cryptoCode]) throw new Error(`Unsupported coin: ${cryptoCode}`)
+  return settingsLoader.loadLatest()
+  .then(settings => {
+    const config = configManager.unscoped(settings.config)
+    const fiatCode = config.fiatCurrency
+
+    const promises = [
+      wallet.newFunding(settings, cryptoCode),
+      ticker.getRates(settings, fiatCode, cryptoCode)
+    ]
+
+    return Promise.all(promises)
+    .then(([fundingRec, ratesRec]) => {
+      const rates = ratesRec.rates
+      const rate = (rates.ask.add(rates.bid)).div(2)
+      const fundingConfirmedBalance = fundingRec.fundingConfirmedBalance
+      const fiatConfirmedBalance = computeFiat(rate, cryptoCode, fundingConfirmedBalance)
+      const pending = fundingRec.fundingPendingBalance.sub(fundingConfirmedBalance)
+      const fiatPending = computeFiat(rate, cryptoCode, pending)
+      const fundingAddress = fundingRec.fundingAddress
+      const fundingAddressUrl = coinUtils.buildUrl(cryptoCode, fundingAddress)
+
+      return {
+        cryptoCode,
+        cryptoDisplays,
+        fundingAddress,
+        fundingAddressUrl,
+        confirmedBalance: computeCrypto(cryptoCode, fundingConfirmedBalance).toFormat(5),
+        pending: computeCrypto(cryptoCode, pending).toFormat(5),
+        fiatConfirmedBalance: fiatConfirmedBalance.toFormat(2),
+        fiatPending: fiatPending.toFormat(2),
+        fiatCode
+      }
+    })
+  })
+}