From a4f64bd1bf8df41f45df8cc45f0d453a3a921658 Mon Sep 17 00:00:00 2001
From: Jude Nelson <judecn@gmail.com>
Date: Mon, 10 Apr 2017 11:49:13 -0400
Subject: [PATCH] renamed old blockstack_utxo to blockstack_core as UTXO
 endpoint

---
 .../backend/utxo/blockstack_core.py           | 129 ++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 blockstack_client/backend/utxo/blockstack_core.py

diff --git a/blockstack_client/backend/utxo/blockstack_core.py b/blockstack_client/backend/utxo/blockstack_core.py
new file mode 100644
index 000000000..e8933d805
--- /dev/null
+++ b/blockstack_client/backend/utxo/blockstack_core.py
@@ -0,0 +1,129 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+"""
+    Blockstack-client
+    ~~~~~
+    copyright: (c) 2014-2015 by Halfmoon Labs, Inc.
+    copyright: (c) 2016 by Blockstack.org
+
+    This file is part of Blockstack-client.
+
+    Blockstack-client is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Blockstack-client is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+    You should have received a copy of the GNU General Public License
+    along with Blockstack-client. If not, see <http://www.gnu.org/licenses/>.
+"""
+
+from .blockchain_client import BlockchainClient
+
+from xmlrpclib import ServerProxy, Transport
+from defusedxml import xmlrpc
+import httplib
+import json
+
+# prevent the usual XML attacks
+xmlrpc.monkey_patch()
+
+class BlockstackCoreUTXOClient( BlockchainClient ):
+    def __init__(self, server, port):
+        self.type = "blockstack_utxo"
+        self.server = server
+        self.port = port
+
+    def get_unspents(self, address):
+        return get_unspents( address, self )
+
+    def broadcast_transaction(self, txdata ):
+        return broadcast_transaction( txdata, self )
+
+
+# TODO: make into its own module
+# https://seattle.poly.edu/browser/seattle/trunk/demokit/timeout_xmlrpclib.py?rev=692
+class TimeoutHTTPConnection(httplib.HTTPConnection):
+    def connect(self):
+        httplib.HTTPConnection.connect(self)
+        self.sock.settimeout(self.timeout)
+
+
+class TimeoutHTTP(httplib.HTTP):
+    _connection_class = TimeoutHTTPConnection
+
+    def set_timeout(self, timeout):
+        self._conn.timeout = timeout
+
+    def getresponse(self, **kw):
+        return self._conn.getresponse(**kw)
+
+
+class TimeoutTransport(Transport):
+    def __init__(self, *l, **kw):
+        self.timeout = kw.get('timeout', 10)
+        if 'timeout' in kw.keys():
+            del kw['timeout']
+
+        Transport.__init__(self, *l, **kw)
+
+    def make_connection(self, host):
+        conn = TimeoutHTTP(host)
+        conn.set_timeout(self.timeout)
+        return conn
+
+class TimeoutServerProxy(ServerProxy):
+    def __init__(self, uri, *l, **kw):
+        kw['transport'] = TimeoutTransport(timeout=kw.get('timeout',10), use_datetime=kw.get('use_datetime', 0))
+        if 'timeout' in kw.keys():
+            del kw['timeout']
+        
+        ServerProxy.__init__(self, uri, *l, **kw)
+
+
+class BlockstackCoreRPCClient(object):
+    """
+    RPC client for the blockstack server
+    """
+    def __init__(self, server, port, timeout=30 ):
+        self.srv = TimeoutServerProxy( "http://%s:%s" % (server, port), timeout=timeout, allow_none=True )
+        self.server = server
+        self.port = port
+
+    def __getattr__(self, key):
+        try:
+            return object.__getattr__(self, key)
+        except AttributeError:
+            def inner(*args, **kw):
+                func = getattr(self.srv, key)
+                res = func(*args, **kw)
+                if res is not None:
+                    # lol jsonrpc within xmlrpc
+                    res = json.loads(res)
+                return res
+            return inner
+
+
+def get_unspents( address, client=BlockstackCoreUTXOClient("localhost", 6264) ):
+    """
+    Get unspent outputs from a Blockstack server.
+    """
+    proxy = BlockstackCoreRPCClient( client.server, client.port )
+    unspents = proxy.get_unspents( address )
+    return unspents
+
+
+def broadcast_transaction( txdata, client ):
+    """
+    Send a transaction through a Blockstack server
+    """
+    if not isinstance(client, BlockstackCoreUTXOClient):
+        raise Exception("Not a Blockstack UTXO client")
+
+    proxy = BlockstackCoreRPCClient( client.server, client.port )
+    res = proxy.broadcast_transaction( txdata )
+    return res
+