refactor cash-in and cash-out

lib/cash-in/cash-in-tx.js

@@ -0,0 +1,126 @@
+const _ = require('lodash/fp')
+const pgp = require('pg-promise')()
+const pEachSeries = require('p-each-series')
+
+const db = require('../db')
+const plugins = require('../plugins')
+const logger = require('../logger')
+
+const cashInAtomic = require('./cash-in-atomic')
+const cashInLow = require('./cash-in-low')
+
+const PENDING_INTERVAL = '60 minutes'
+const MAX_PENDING = 10
+
+module.exports = {post, monitorPending, cancel, PENDING_INTERVAL}
+
+function post (machineTx, pi) {
+  return db.tx(cashInAtomic.atomic(machineTx, pi))
+  .then(r => {
+    const updatedTx = r.tx
+
+    return postProcess(r, pi)
+    .then(changes => cashInLow.update(db, updatedTx, changes))
+    .then(tx => _.set('bills', machineTx.bills, tx))
+  })
+}
+
+function registerTrades (pi, newBills) {
+  _.forEach(bill => pi.buy(bill), newBills)
+}
+
+function logAction (rec, tx) {
+  const action = {
+    tx_id: tx.id,
+    action: rec.action || (rec.sendConfirmed ? 'sendCoins' : 'sendCoinsError'),
+    error: rec.error,
+    error_code: rec.errorCode,
+    tx_hash: rec.txHash
+  }
+
+  const sql = pgp.helpers.insert(action, null, 'cash_in_actions')
+
+  return db.none(sql)
+  .then(_.constant(rec))
+}
+
+function logActionById (action, _rec, txId) {
+  const rec = _.assign(_rec, {action, tx_id: txId})
+  const sql = pgp.helpers.insert(rec, null, 'cash_in_actions')
+
+  return db.none(sql)
+}
+
+function postProcess (r, pi) {
+  registerTrades(pi, r.newBills)
+
+  if (!cashInLow.isClearToSend(r.dbTx, r.tx)) return Promise.resolve({})
+
+  return pi.sendCoins(r.tx)
+  .then(txHash => ({
+    txHash,
+    sendConfirmed: true,
+    sendTime: 'now()^',
+    sendPending: false,
+    error: null,
+    errorCode: null
+  }))
+  .catch(err => {
+    // Important: We don't know what kind of error this is
+    // so not safe to assume that funds weren't sent.
+    // Therefore, don't set sendPending to false except for
+    // errors (like InsufficientFundsError) that are guaranteed
+    // not to send.
+    const sendPending = err.name !== 'InsufficientFundsError'
+
+    return {
+      sendTime: 'now()^',
+      error: err.message,
+      errorCode: err.name,
+      sendPending
+    }
+  })
+  .then(sendRec => logAction(sendRec, r.tx))
+}
+
+function monitorPending (settings) {
+  const sql = `select * from cash_in_txs
+  where created > now() - interval $1
+  and send
+  and not send_confirmed
+  and not send_pending
+  and not operator_completed
+  order by created
+  limit $2`
+
+  const processPending = row => {
+    const tx = cashInLow.toObj(row)
+    const pi = plugins(settings, tx.deviceId)
+
+    return post(tx, pi)
+    .catch(logger.error)
+  }
+
+  return db.any(sql, [PENDING_INTERVAL, MAX_PENDING])
+  .then(rows => pEachSeries(rows, row => processPending(row)))
+  .catch(logger.error)
+}
+
+function cancel (txId) {
+  const updateRec = {
+    error: 'Operator cancel',
+    error_code: 'operatorCancel',
+    operator_completed: true
+  }
+
+  return Promise.resolve()
+  .then(() => {
+    return pgp.helpers.update(updateRec, null, 'cash_in_txs') +
+      pgp.as.format(' where id=$1', [txId])
+  })
+  .then(sql => db.result(sql, false))
+  .then(res => {
+    if (res.rowCount !== 1) throw new Error('No such tx-id')
+  })
+  .then(() => logActionById('operatorCompleted', {}, txId))
+}