@btcforme

README.md

Instructions

1. Download and install Node.js and npm (comes with Node.js)
2. Download this code
3. Change to the directory where the source code is (with a terminal)
4. Type npm install to install module dependencies
5. Edit app.js and edit the "settings" section
6. Run the app by typing node app.js

app.js

// -- settings / edit below
var DEMO_MODE = true; // set this to false to enable sending bitcoins

var BTC_AMOUNT = 0.01; // amount in BTC to send to each address
var TWITTER_TRACK_KEYWORD = '@BTCForMe';

// Twitter API credentials. Get them here: https://dev.twitter.com/apps/new
var TWITTER_CONSUMER_KEY = '**********';
var TWITTER_CONSUMER_SECRET = '**********';
var TWITTER_ACCESS_TOKEN_KEY = '**********';
var TWITTER_ACCESS_TOKEN_SECRET = '**********';


// You could also use your Bitcoin client's JSON-RPC interface instead of blockchain.info
var JSONRPC_USER = '********-****-****-****-************'; // e.g. blockchain.info wallet identifier
var JSONRPC_PASSWORD = '**********'; // e.g. blockchain.info wallet password
var JSONRPC_HOST = 'blockchain.info';
var JSONRPC_PORT = 80;
// -- end of settings

var Twitter = require('ntwitter');
var bitcoin = require('bitcoin');

var client = new bitcoin.Client({
	'host' : JSONRPC_HOST,
	'port' : JSONRPC_PORT,
	'user' : JSONRPC_USER,
	'pass' : JSONRPC_PASSWORD
});

var findBitcoinAddress = function (tweet) {
	var matches = /[123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ]{25,34}/.exec(tweet);

	if (matches && matches[0]) {
		return matches[0];
	}

	return false;
};

var twit = new Twitter({
	'consumer_key' : TWITTER_CONSUMER_KEY,
	'consumer_secret' : TWITTER_CONSUMER_SECRET,
	'access_token_key' : TWITTER_ACCESS_TOKEN_KEY,
	'access_token_secret' : TWITTER_ACCESS_TOKEN_SECRET
});

twit.stream('statuses/filter', {
	'track' : TWITTER_TRACK_KEYWORD

}, function (stream) {
	stream.on('data', function (data) {
		var bitcoinAddress = findBitcoinAddress(data.text);
		if (!bitcoinAddress) { return console.error('Tweet does not contain a bitcoin address'); }

		client.validateAddress(bitcoinAddress, function (err, check) {
			if (err) return console.error(err);

			if (check.isvalid) {

				if (DEMO_MODE === false) {
					client.sendToAddress(bitcoinAddress, BTC_AMOUNT, function (err, transactionId) {
						if (err) return console.error(err);

						console.info('Sent', BTC_AMOUNT, 'BTC to', bitcoinAddress);
						console.info('Transaction:', transactionId);
					});

				} else {
					console.info('DEMO MODE:', 'Didn\'t send', BTC_AMOUNT, 'BTC to', bitcoinAddress);
				}
			}
		});

	});

	stream.on('error', function (err) {
		console.error(err);
	});
});

package.json

{
	"name" : "BTCForMe",
	"version" : "0.0.1",
	"dependencies" : {
		"ntwitter": "*",
		"bitcoin" : "*"
	},
	"engines" : {
		"node" : "*"
	}
}