text: #!/usr/bin/env python2
  # Copyright (c) 2014-2015 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #
  # Test merkleblock fetch/validation
  #
  
  from test_framework.test_framework import BitcoinTestFramework
  from test_framework.util import *
  
  class MerkleBlockTest(BitcoinTestFramework):
  
      def setup_chain(self):
          print("Initializing test directory "+self.options.tmpdir)
          initialize_chain_clean(self.options.tmpdir, 4)
  
      def setup_network(self):
          self.nodes = []
          # Nodes 0/1 are "wallet" nodes
          self.nodes.append(start_node(0, self.options.tmpdir, ["-debug"]))
          self.nodes.append(start_node(1, self.options.tmpdir, ["-debug"]))
          # Nodes 2/3 are used for testing
          self.nodes.append(start_node(2, self.options.tmpdir, ["-debug"]))
          self.nodes.append(start_node(3, self.options.tmpdir, ["-debug", "-txindex"]))
          connect_nodes(self.nodes[0], 1)
          connect_nodes(self.nodes[0], 2)
          connect_nodes(self.nodes[0], 3)
  
          self.is_network_split = False
          self.sync_all()
  
      def run_test(self):
          print "Mining blocks..."
          self.nodes[0].generate(105)
          self.sync_all()
  
          chain_height = self.nodes[1].getblockcount()
          assert_equal(chain_height, 105)
          assert_equal(self.nodes[1].getbalance(), 0)
          assert_equal(self.nodes[2].getbalance(), 0)
  
          node0utxos = self.nodes[0].listunspent(1)
          tx1 = self.nodes[0].createrawtransaction([node0utxos.pop()], {self.nodes[1].getnewaddress(): 500})
          txid1 = self.nodes[0].sendrawtransaction(self.nodes[0].signrawtransaction(tx1)["hex"])
          tx2 = self.nodes[0].createrawtransaction([node0utxos.pop()], {self.nodes[1].getnewaddress(): 500})
          txid2 = self.nodes[0].sendrawtransaction(self.nodes[0].signrawtransaction(tx2)["hex"])
          assert_raises(JSONRPCException, self.nodes[0].gettxoutproof, [txid1])
  
          self.nodes[0].generate(1)
          blockhash = self.nodes[0].getblockhash(chain_height + 1)
          self.sync_all()
  
          txlist = []
          blocktxn = self.nodes[0].getblock(blockhash, True)["tx"]
          txlist.append(blocktxn[1])
          txlist.append(blocktxn[2])
  
          assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid1])), [txid1])
          assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid1, txid2])), txlist)
          assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid1, txid2], blockhash)), txlist)
  
          txin_spent = self.nodes[1].listunspent(1).pop()
          tx3 = self.nodes[1].createrawtransaction([txin_spent], {self.nodes[0].getnewaddress(): 500})
          self.nodes[0].sendrawtransaction(self.nodes[1].signrawtransaction(tx3)["hex"])
          self.nodes[0].generate(1)
          self.sync_all()
  
          txid_spent = txin_spent["txid"]
          txid_unspent = txid1 if txin_spent["txid"] != txid1 else txid2
  
          # We can't find the block from a fully-spent tx
          # Doesn't apply to Ltucoin Core - we have txindex always on
          # assert_raises(JSONRPCException, self.nodes[2].gettxoutproof, [txid_spent])
          # ...but we can if we specify the block
          assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid_spent], blockhash)), [txid_spent])
          # ...or if the first tx is not fully-spent
          assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid_unspent])), [txid_unspent])
          try:
              assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid1, txid2])), txlist)
          except JSONRPCException:
              assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid2, txid1])), txlist)
          # ...or if we have a -txindex
          assert_equal(self.nodes[2].verifytxoutproof(self.nodes[3].gettxoutproof([txid_spent])), [txid_spent])
  
  if __name__ == '__main__':
      MerkleBlockTest().main()
  