From d8e66d23e0e309756bd7385657692ccc2f2d9a35 Mon Sep 17 00:00:00 2001
From: Chris Kleeschulte <chrisk@bitpay.com>
Date: Wed, 14 Oct 2015 13:16:39 -0400
Subject: [PATCH] Added the Satoshi fire alarm example.

---
 satoshicoins/index.js     | 88 +++++++++++++++++++++++++++++++++++++++
 satoshicoins/package.json |  4 ++
 2 files changed, 92 insertions(+)
 create mode 100644 satoshicoins/index.js
 create mode 100644 satoshicoins/package.json

diff --git a/satoshicoins/index.js b/satoshicoins/index.js
new file mode 100644
index 0000000..9ab4c37
--- /dev/null
+++ b/satoshicoins/index.js
@@ -0,0 +1,88 @@
+var index = require('../../node_modules/bitcore-node');
+var log = index.log;
+var util = require('util');
+var Service = require('../../node_modules/bitcore-node/lib/service');
+var Transaction = require('../../node_modules/bitcore-node/lib/transaction');
+var spawn = require('child_process').spawn;
+
+function SatoshiCoins(options) {
+  Service.call(this, options);
+  this.alarmActivated = false;
+  this.child;
+  this.interestingAddresses = [
+    '1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa', //this is the address that the genesis paid its coinbase to. Can't be spent due to a bug in the code.
+    '12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX', //Block 1
+    '1HLoD9E4SDFFPDiYfNYnkBLQ85Y51J3Zb1' //Block 2
+  ];
+  this.node.services.bitcoind.on('tx', this.transactionHandler.bind(this));
+}
+
+/*
+ * We are going to need bitcoind because we will be setting event listeners (subscribers)
+ * on Blocks and such
+ */
+SatoshiCoins.dependencies = ['bitcoind', 'db', 'address'];
+
+/*
+ * inherits the serivce base class so we get some stuff for free
+ */
+util.inherits(SatoshiCoins, Service);
+
+/*
+ * start: REQUIRED!! Ours just calls the callback
+ */
+SatoshiCoins.prototype.start = function(callback) {
+  callback();
+}
+
+/*
+ * stop: REQUIRED!! Ours just calls the callback
+ */
+SatoshiCoins.prototype.stop = function(callback) {
+  callback();
+}
+
+/*
+ * transactionHandler: this is the delegate when a transaction is received by your node
+ */
+SatoshiCoins.prototype.transactionHandler = function(txinfo) {
+  var tx = bitcore.Transaction().fromBuffer(txInfo.buffer);
+
+  var messages = {};
+
+  var inputsLength = tx.inputs.length;
+  for (var i = 0; i < inputsLength; i++) {
+    this.transactionInputHandler(tx, i);
+  }
+
+}
+
+/*
+ * transactionInputHandler: helper for transactionHandler
+ */
+SatoshiCoins.prototype.transactionInputHandler = function(tx, i) {
+  var address = tx.inputs[i].script.toAddress();
+
+  if (typeof address !== 'undefined' &&
+      this.interestingAddresses.indexOf(address) != -1) {
+    this.soundAlarm();
+  }
+}
+
+/*
+ * soundAlarm: will launch a separate alarm program (not provided)
+ */
+SatoshiCoins.prototype.soundAlarm = function() {
+  if (this.alarmActivated) return;
+
+  this.alarmActivated = true;
+  var child = spawn('alarm', []);
+}
+
+SatoshiCoins.prototype.resetAlarm = function() {
+  child.kill();
+  this.alarmActivated = false;
+}
+
+module.exports = SatoshiCoins;
+
diff --git a/satoshicoins/package.json b/satoshicoins/package.json
new file mode 100644
index 0000000..9664f26
--- /dev/null
+++ b/satoshicoins/package.json
@@ -0,0 +1,4 @@
+{
+  "dependencies": {
+  }
+}