Reserve notes for redeem

lib/cash-out-helper.js

@@ -0,0 +1,95 @@
+const _ = require('lodash/fp')
+
+const db = require('./db')
+const T = require('./time')
+const BN = require('./bn')
+
+const REDEEMABLE_AGE = T.day
+
+module.exports = {redeemableTxs, toObj, toDb}
+
+const mapValuesWithKey = _.mapValues.convert({cap: false})
+
+function convertBigNumFields (obj) {
+  const convert = (value, key) => _.includes(key, ['cryptoAtoms', 'fiat'])
+  ? value.toString()
+  : value
+
+  const convertKey = key => _.includes(key, ['cryptoAtoms', 'fiat'])
+  ? key + '#'
+  : key
+
+  return _.mapKeys(convertKey, mapValuesWithKey(convert, obj))
+}
+
+function convertField (key) {
+  return _.snakeCase(key)
+}
+
+function addDbBills (tx) {
+  const bills = tx.bills
+  if (_.isEmpty(bills)) return tx
+
+  return _.assign(tx, {
+    provisioned1: bills[0].provisioned,
+    provisioned2: bills[1].provisioned,
+    denomination1: bills[0].denomination,
+    denomination2: bills[1].denomination
+  })
+}
+
+function toDb (tx) {
+  const massager = _.flow(convertBigNumFields, addDbBills,
+    _.omit(['direction', 'bills']), _.mapKeys(convertField))
+
+  return massager(tx)
+}
+
+function toObj (row) {
+  if (!row) return null
+
+  const keys = _.keys(row)
+  let newObj = {}
+
+  keys.forEach(key => {
+    const objKey = _.camelCase(key)
+    if (key === 'crypto_atoms' || key === 'fiat') {
+      newObj[objKey] = BN(row[key])
+      return
+    }
+
+    newObj[objKey] = row[key]
+  })
+
+  newObj.direction = 'cashOut'
+
+  const billFields = ['denomination1', 'denomination2', 'provisioned1', 'provisioned2']
+
+  if (_.every(_.isNil, _.at(billFields, newObj))) return newObj
+  if (_.some(_.isNil, _.at(billFields, newObj))) throw new Error('Missing cassette values')
+
+  const bills = [
+    {
+      denomination: newObj.denomination1,
+      provisioned: newObj.provisioned1
+    },
+    {
+      denomination: newObj.denomination2,
+      provisioned: newObj.provisioned2
+    }
+  ]
+
+  return _.set('bills', bills, _.omit(billFields, newObj))
+}
+
+function redeemableTxs (deviceId) {
+  const sql = `select * from cash_out_txs
+  where device_id=$1
+  and redeem=$2
+  and dispense=$3
+  and provisioned_1 is not null
+  and (extract(epoch from (now() - greatest(created, confirmation_time))) * 1000) < $4`
+
+  return db.any(sql, [deviceId, true, false, REDEEMABLE_AGE])
+  .then(_.map(toObj))
+}