Lots of development

lib/wallet.js

@@ -1,27 +1,38 @@
+const _ = require('lodash/fp')
 const mem = require('mem')
+const HKDF = require('node-hkdf-sync')
+
 const configManager = require('./config-manager')
+const pify = require('pify')
+const fs = pify(require('fs'))
+const options = require('./options')
 
 const FETCH_INTERVAL = 5000
+const INSUFFICIENT_FUNDS_CODE = 570
+const INSUFFICIENT_FUNDS_NAME = 'InsufficientFunds'
+
+function httpError (msg, code) {
+  const err = new Error(msg)
+  err.name = 'HTTPError'
+  err.code = code || 500
+
+  return err
+}
+
+function computeSeed (masterSeed) {
+  const hkdf = new HKDF('sha256', 'lamassu-server-salt', masterSeed)
+  return hkdf.derive('wallet-seed', 32)
+}
 
 function fetchWallet (settings, cryptoCode) {
-  return Promise.resolve()
-  .then(() => {
-    console.log('DEBUG44')
-    console.log('DEBUG44.0.0: %j', cryptoCode)
-    try {
-      console.log('DEBUG44.0: %j', configManager.cryptoScoped(cryptoCode, settings.config).wallet)
-    } catch (err) {
-      console.log('DEBUG44.0.e: %s', err.stack)
-    }
+  return fs.readFile(options.seedPath, 'utf8')
+  .then(hex => {
+    const masterSeed = Buffer.from(hex.trim(), 'hex')
     const plugin = configManager.cryptoScoped(cryptoCode, settings.config).wallet
-    console.log('DEBUG44.1')
     const account = settings.accounts[plugin]
-    console.log('DEBUG44.2')
     const wallet = require('lamassu-' + plugin)
 
-    console.log('DEBUG45: %j', {wallet, account})
-
-    return {wallet, account}
+    return {wallet, account: _.set('seed', computeSeed(masterSeed), account)}
   })
 }
 
@@ -44,11 +55,18 @@ function sendCoins (settings, toAddress, cryptoAtoms, cryptoCode) {
       return res
     })
   })
+  .catch(err => {
+    if (err.name === INSUFFICIENT_FUNDS_NAME) {
+      throw httpError(INSUFFICIENT_FUNDS_NAME, INSUFFICIENT_FUNDS_CODE)
+    }
+
+    throw err
+  })
 }
 
-function newAddress (settings, cryptoCode, info) {
-  return fetchWallet(settings, cryptoCode)
-  .then(r => r.wallet.newAddress(r.account, cryptoCode, info))
+function newAddress (settings, info) {
+  return fetchWallet(settings, info.cryptoCode)
+  .then(r => r.wallet.newAddress(r.account, info))
 }
 
 function getStatus (settings, toAddress, cryptoAtoms, cryptoCode) {
@@ -56,9 +74,21 @@ function getStatus (settings, toAddress, cryptoAtoms, cryptoCode) {
   .then(r => r.wallet.getStatus(r.account, toAddress, cryptoAtoms, cryptoCode))
 }
 
+function sweep (settings, cryptoCode, hdIndex) {
+  return fetchWallet(settings, cryptoCode)
+  .then(r => r.wallet.sweep(r.account, cryptoCode, hdIndex))
+}
+
+function isHd (settings, cryptoCode) {
+  return fetchWallet(settings, cryptoCode)
+  .then(r => r.wallet.supportsHd)
+}
+
 module.exports = {
   balance: mem(balance, {maxAge: FETCH_INTERVAL}),
   sendCoins,
   newAddress,
-  getStatus
+  getStatus,
+  sweep,
+  isHd
 }