From b5e8555ff56ecebee2c26becd939ea4bb0cbeb6d Mon Sep 17 00:00:00 2001
From: Jude Nelson <judecn@gmail.com>
Date: Tue, 25 Apr 2017 18:18:29 -0400
Subject: [PATCH] test for malformed OP_RETURNs

---
 .../scenarios/virtualchain_bad_opcodes.py     | 112 ++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 integration_tests/blockstack_integration_tests/scenarios/virtualchain_bad_opcodes.py

diff --git a/integration_tests/blockstack_integration_tests/scenarios/virtualchain_bad_opcodes.py b/integration_tests/blockstack_integration_tests/scenarios/virtualchain_bad_opcodes.py
new file mode 100644
index 000000000..5a31f67ad
--- /dev/null
+++ b/integration_tests/blockstack_integration_tests/scenarios/virtualchain_bad_opcodes.py
@@ -0,0 +1,112 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+    Blockstack
+    ~~~~~
+    copyright: (c) 2014-2015 by Halfmoon Labs, Inc.
+    copyright: (c) 2016 by Blockstack.org
+
+    This file is part of Blockstack
+
+    Blockstack 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 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. If not, see <http://www.gnu.org/licenses/>.
+""" 
+
+import testlib 
+import json
+import blockstack_client
+import virtualchain
+import binascii
+
+wallets = [
+    testlib.Wallet( "5JesPiN68qt44Hc2nT8qmyZ1JDwHebfoh9KQ52Lazb1m1LaKNj9", 100000000000 ),
+    testlib.Wallet( "5KHqsiU9qa77frZb6hQy9ocV7Sus9RWJcQGYYBJJBb2Efj1o77e", 100000000000 )
+]
+
+consensus = "17ac43c1d8549c3181b200f1bf97eb7d"
+
+
+def mktx( amt, tx_fee, recipient_addr, privkey, message=None ):
+    """
+    Make the transaction with the given fee
+    """
+    change_addr = virtualchain.BitcoinPrivateKey(privkey).public_key().address()
+    inputs = testlib.get_unspents(change_addr)
+    change = virtualchain.calculate_change_amount(inputs, amt, tx_fee)
+
+    outputs = [
+        {'script': virtualchain.make_payment_script(recipient_addr),
+         'value': amt},
+    ]
+
+    if change > 0:
+        # need change and tx fee
+        outputs.append( 
+            {'script': virtualchain.make_payment_script(change_addr),
+              "value": change}
+        )
+
+    if message:
+        outputs = [
+            {"script": virtualchain.make_data_script(binascii.hexlify(message)),
+             "value": 0} ] + outputs
+
+    serialized_tx = blockstack_client.tx.serialize_tx(inputs, outputs)
+    signed_tx = blockstack_client.tx.sign_tx(serialized_tx, privkey)
+    return signed_tx
+
+
+def scenario( wallets, **kw ):
+    # send a data-bearing transaction without 'id'
+    tx = mktx(5500, 5500, wallets[1].addr, wallets[0].privkey, "eg")
+    if 'error' in tx:
+        print tx
+        return False
+
+    res = blockstack_client.tx.broadcast_tx(tx)
+    if 'error' in res:
+        print res
+        return False
+
+    testlib.next_block(**kw)
+
+    # send a data-bearing transaction with only 'id'
+    tx = mktx(5500, 5500, wallets[1].addr, wallets[0].privkey, "id")
+    if 'error' in tx:
+        print tx
+        return False
+
+    res = blockstack_client.tx.broadcast_tx(tx)
+    if 'error' in res:
+        print res
+        return False
+
+    testlib.next_block(**kw)
+
+    # send a data-bearing transaction with an invalid opcode after 'id'
+    tx = mktx(5500, 5500, wallets[1].addr, wallets[0].privkey, "id{")
+    if 'error' in tx:
+        print tx
+        return False
+
+    res = blockstack_client.tx.broadcast_tx(tx)
+    if 'error' in res:
+        print res
+        return False
+
+    testlib.next_block(**kw)
+
+
+def check( state_engine ):
+    
+    return True
+