Improved instructions, usage considerations

index.js

@@ -12,12 +12,19 @@ function LemonadeStand(options) {
   this.log = this.node.log;
 
   this.invoiceHtml = fs.readFileSync(__dirname + '/invoice.html', 'utf8');
-  this.amount = 12340000;
 
-  // Use 1 HD Private Key and generate a unique address for every invoice
+  this.price = 12340000; // (sats)
+
+  // Use a HD Private Key and generate a unique address for every invoice
+  //TODO generate/display once, and from then on, load same xprv ('merchant master private key') from an encrypted db
   this.hdPrivateKey = new bitcore.HDPrivateKey(this.node.network);
-  this.log.info('Using key:', this.hdPrivateKey);
+  //TODO reload this from db.lastAddressIndex
   this.addressIndex = 0;
+
+  //TODO implement item id's for multiple items; could use same xprv for all
+
+  this.log.info('xprv key:', this.hdPrivateKey);
+  this.log.info('addressIndex:', this.addressIndex);
 }
 
 LemonadeStand.dependencies = ['bitcoind'];
@@ -38,6 +45,22 @@ LemonadeStand.prototype.getPublishEvents = function() {
   return [];
 };
 
+  //TODO Implement State Machine: AWAITING_PAYMENT -> FULL_AMOUNT_RECEIVED / TIMED_OUT / PARTIAL_AMOUNT_RECEIVED
+
+  //TODO Poll on all not-completed (timed_out, full_amount_received) addresses (between 0 -> lastAddressIndex)
+  /*  we need to also listen, just like invoice.html -
+
+      var socket = io('http://localhost:8001');
+      socket.emit('subscribe', 'bitcoind/addresstxid', ['{{address}}']);
+      socket.on('bitcoind/addresstxid', function(data) {
+         var address = bitcore.Address(data.address);
+         if (address.toString() == '{{address}}') {
+           //TODO save an entry in db for each confirmed payment, for each relevant addr
+           //db.save({index: index, txid: txid, fromAddress, amount, time})
+           ...
+  */
+
+
 LemonadeStand.prototype.setupRoutes = function(app, express) {
   var self = this;
 
@@ -45,9 +68,17 @@ LemonadeStand.prototype.setupRoutes = function(app, express) {
 
   app.use('/', express.static(__dirname + '/static'));
 
+  // This module will be installed as a service of Bitcore, which will be running on 8001.
+
+  // TO USE (Generate an invoice) -
+  // POST localhost:8001/invoice {amount: 100}
+  // (or visit localhost:8001)
+
   app.post('/invoice', function(req, res, next) {
     self.addressIndex++;
-    self.amount = parseFloat(req.body.amount) * 1e8;
+    //TODO db.increment(lastAddressIndex)
+    //convert from btcp to sats (for static/index.html demo):
+    //self.price = parseFloat(req.body.price) * 1e8;
     res.status(200).send(self.filterInvoiceHTML());
   });
 };
@@ -57,12 +88,13 @@ LemonadeStand.prototype.getRoutePrefix = function() {
 };
 
 LemonadeStand.prototype.filterInvoiceHTML = function() {
-  var btc = this.amount / 1e8;
+  var btcp = this.price / 1e8;
   var address = this.hdPrivateKey.derive(this.addressIndex).privateKey.toAddress();
-  this.log.info('New invoice with address:', address);
-  var hash = address.hashBuffer.toString('hex');
+  this.log.info('New invoice, with generated address:', address);
+
+  var hash = address.hashBuffer.toString('hex'); //TODO shouldn't need this
   var transformed = this.invoiceHtml
-    .replace(/{{amount}}/g, btc)
+    .replace(/{{price}}/g, btcp)
     .replace(/{{address}}/g, address)
     .replace(/{{hash}}/g, hash)
     .replace(/{{baseUrl}}/g, '/' + this.getRoutePrefix() + '/');

static/index.html

@@ -9,7 +9,7 @@
   <h2>Invoice</h2>
 
   <form method="post" action="invoice">
-    Amount: <input type="text" name="amount"/> BTCP <input type="submit" value="Generate Invoice" />
+    Amount: <input type="text" name="price"/> BTCP <input type="submit" value="Generate Invoice" />
   </form>
 </body>