Reserve notes for redeem

lib/plugins.js

@@ -15,6 +15,7 @@ const wallet = require('./wallet')
 const exchange = require('./exchange')
 const sms = require('./sms')
 const email = require('./email')
+const cashOutHelper = require('./cash-out-helper')
 
 const mapValuesWithKey = _.mapValues.convert({cap: false})
 
@@ -71,47 +72,83 @@ function plugins (settings, deviceId) {
     return balances
   }
 
-  function buildCassettes () {
+  function isZeroConf (tx) {
+    const config = configManager.scoped(tx.cryptoCode, deviceId, settings.config)
+    const zeroConfLimit = config.zeroConfLimit
+    return tx.fiat.lte(zeroConfLimit)
+  }
+
+  function computeAvailableCassettes (cassettes, redeemableTxs) {
+    if (_.isEmpty(redeemableTxs)) return cassettes
+
+    const sumTxs = (sum, tx) => {
+      const bills = tx.bills
+      const sameDenominations = a => a[0].denomination === a[1].denomination
+      const doDenominationsMatch = _.every(sameDenominations, _.zip(cassettes, bills))
+
+      if (!doDenominationsMatch) {
+        throw new Error('Denominations don\'t add up, cassettes were changed.')
+      }
+
+      return _.map(r => r[0] + r[1].provisioned, _.zip(sum, tx.bills))
+    }
+
+    const provisioned = _.reduce(sumTxs, [0, 0], redeemableTxs)
+    const zipped = _.zip(_.map('count', cassettes), provisioned)
+    const counts = _.map(r => r[0] - r[1], zipped)
+
+    if (_.some(_.lt(_, 0), counts)) {
+      throw new Error('Negative note count: %j', counts)
+    }
+
+    return [
+      {
+        denomination: cassettes[0].denomination,
+        count: counts[0]
+      },
+      {
+        denomination: cassettes[1].denomination,
+        count: counts[1]
+      }
+    ]
+  }
+
+  function buildAvailableCassettes (excludeTxId) {
     const config = configManager.machineScoped(deviceId, settings.config)
 
     if (!config.cashOutEnabled) return Promise.resolve()
 
-    const cassettes = [ config.topCashOutDenomination,
+    const denominations = [ config.topCashOutDenomination,
       config.bottomCashOutDenomination ]
     const virtualCassettes = [config.virtualCashOutDenomination]
 
-    return dbm.cassetteCounts(deviceId)
-    .then(rec => {
-      if (argv.cassettes) {
-        const counts = argv.cassettes.split(',')
+    return Promise.all([dbm.cassetteCounts(deviceId), cashOutHelper.redeemableTxs(deviceId, excludeTxId)])
+    .then(([rec, _redeemableTxs]) => {
+      const redeemableTxs = _.reject(_.matchesProperty('id', excludeTxId), _redeemableTxs)
 
+      const counts = argv.cassettes
+      ? argv.cassettes.split(',')
+      : rec.counts
+
+      const cassettes = [
+        {
+          denomination: parseInt(denominations[0], 10),
+          count: parseInt(counts[0], 10)
+        },
+        {
+          denomination: parseInt(denominations[1], 10),
+          count: parseInt(counts[1], 10)
+        }
+      ]
+
+      try {
         return {
-          cassettes: [
-            {
-              denomination: parseInt(cassettes[0], 10),
-              count: parseInt(counts[0], 10)
-            },
-            {
-              denomination: parseInt(cassettes[1], 10),
-              count: parseInt(counts[1], 10)
-            }
-          ],
+          cassettes: computeAvailableCassettes(cassettes, redeemableTxs),
           virtualCassettes
         }
-      }
-
-      return {
-        cassettes: [
-          {
-            denomination: parseInt(cassettes[0], 10),
-            count: parseInt(rec.counts[0], 10)
-          },
-          {
-            denomination: parseInt(cassettes[1], 10),
-            count: parseInt(rec.counts[1], 10)
-          }
-        ],
-        virtualCassettes
+      } catch (err) {
+        logger.error(err)
+        return {cassettes, virtualCassettes}
       }
     })
   }
@@ -138,7 +175,7 @@ function plugins (settings, deviceId) {
     const currentConfigVersionPromise = fetchCurrentConfigVersion()
 
     const promises = [
-      buildCassettes(),
+      buildAvailableCassettes(),
       pingPromise,
       currentConfigVersionPromise
     ].concat(tickerPromises, balancePromises)
@@ -512,6 +549,7 @@ function plugins (settings, deviceId) {
     sendCoins,
     newAddress,
     isHd,
+    isZeroConf,
     getStatus,
     dispenseAck,
     getPhoneCode,
@@ -522,7 +560,7 @@ function plugins (settings, deviceId) {
     sweepHd,
     sendMessage,
     checkBalances,
-    buildCassettes,
+    buildAvailableCassettes,
     buy,
     sell
   }