Python blocktools.create_transaction函数代码示例

    def run_test(self):
        # Add p2p connection to node0
        node = self.nodes[0]  # convenience reference to the node
        node.add_p2p_connection(P2PDataStore())

        network_thread_start()
        node.p2p.wait_for_verack()

        best_block = self.nodes[0].getbestblockhash()
        tip = int(best_block, 16)
        best_block_time = self.nodes[0].getblock(best_block)['time']
        block_time = best_block_time + 1

        self.log.info("Create a new block with an anyone-can-spend coinbase.")
        height = 1
        block = create_block(tip, create_coinbase(height), block_time)
        block.solve()
        # Save the coinbase for later
        block1 = block
        tip = block.sha256
        node.p2p.send_blocks_and_test([block], node, success=True)

        self.log.info("Mature the block.")
        self.nodes[0].generate(100)

        # b'\x64' is OP_NOTIF
        # Transaction will be rejected with code 16 (REJECT_INVALID)
        tx1 = create_transaction(block1.vtx[0], 0, b'\x64', 50 * COIN - 12000)
        node.p2p.send_txs_and_test([tx1], node, success=False, reject_code=16, reject_reason=b'mandatory-script-verify-flag-failed (Invalid OP_IF construction)')

        # Verify valid transaction
        tx1 = create_transaction(block1.vtx[0], 0, b'', 50 * COIN - 12000)
        node.p2p.send_txs_and_test([tx1], node, success=True)

    def run_test(self):

        # First, quick check that CSV is ACTIVE at genesis
        assert_equal(self.nodes[0].getblockcount(), 0)
        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'active')

        self.nodes[0].add_p2p_connection(P2PInterface())

        self.nodeaddress = self.nodes[0].getnewaddress()

        self.log.info("Test that blocks past the genesis block must be at least version 4")

        # Create a v3 block
        tip = self.nodes[0].getbestblockhash()
        block_time = self.nodes[0].getblockheader(tip)['mediantime'] + 1
        block = create_block(int(tip, 16), create_coinbase(1), block_time)
        block.nVersion = 3
        block.solve()

        # The best block should not have changed, because...
        assert_equal(self.nodes[0].getbestblockhash(), tip)

        # ... we rejected it because it is v3
        with self.nodes[0].assert_debug_log(expected_msgs=['{}, bad-version(0x00000003)'.format(block.hash)]):
            # Send it to the node
            self.nodes[0].p2p.send_and_ping(msg_block(block))

        self.log.info("Test that a version 4 block with a valid-according-to-CLTV transaction is accepted")

        # Generate 100 blocks so that first coinbase matures
        generated_blocks = self.nodes[0].generate(100)
        spendable_coinbase_txid = self.nodes[0].getblock(generated_blocks[0])['tx'][0]
        coinbase_value = self.nodes[0].decoderawtransaction(self.nodes[0].gettransaction(spendable_coinbase_txid)["hex"])["vout"][0]["value"]
        tip = generated_blocks[-1]

        # Construct a v4 block
        block_time = self.nodes[0].getblockheader(tip)['mediantime'] + 1
        block = create_block(int(tip, 16), create_coinbase(len(generated_blocks) + 1), block_time)
        block.nVersion = 4

        # Create a CLTV transaction
        spendtx = create_transaction(self.nodes[0], spendable_coinbase_txid,
                self.nodeaddress, amount=1.0, fee=coinbase_value-1)
        spendtx = cltv_validate(self.nodes[0], spendtx, 1)
        spendtx.rehash()

        # Add the CLTV transaction and prepare for sending
        block.vtx.append(spendtx)
        block.hashMerkleRoot = block.calc_merkle_root()
        block.solve()

        # Send block and check that it becomes new best block
        self.nodes[0].p2p.send_and_ping(msg_block(block))
        assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256)

def create_bip68txs(node, bip68inputs, txversion, address, locktime_delta=0):
    """Returns a list of bip68 transactions with different bits set."""
    txs = []
    assert(len(bip68inputs) >= 16)
    for i, (sdf, srhb, stf, srlb) in enumerate(product(*[[True, False]] * 4)):
        locktime = relative_locktime(sdf, srhb, stf, srlb)
        tx = create_transaction(node, bip68inputs[i], address, amount=Decimal("49.98"))
        tx.nVersion = txversion
        tx.vin[0].nSequence = locktime + locktime_delta
        tx = sign_transaction(node, tx)
        tx.rehash()
        txs.append({'tx': tx, 'sdf': sdf, 'stf': stf})

    return txs

    def run_test(self):
        util.node_fastmerkle = self.nodes[0]
        self.address = self.nodes[0].getnewaddress()
        self.ms_address = self.nodes[0].addmultisigaddress(1, [self.address])['address']
        self.wit_address = self.nodes[0].addwitnessaddress(self.address)
        self.wit_ms_address = self.nodes[0].addmultisigaddress(1, [self.address], '', 'p2sh-segwit')['address']

        self.coinbase_blocks = self.nodes[0].generate(2) # Block 2
        coinbase_txid = []
        for i in self.coinbase_blocks:
            coinbase_txid.append(self.nodes[0].getblock(i)['tx'][0])
        self.nodes[0].generate(427) # Block 429
        self.lastblockhash = self.nodes[0].getbestblockhash()
        self.tip = int("0x" + self.lastblockhash, 0)
        self.lastblockheight = 429
        self.lastblocktime = int(time.time()) + 429

        self.log.info("Test 1: NULLDUMMY compliant base transactions should be accepted to mempool and mined before activation [430]")
        coinbase_value = self.nodes[0].decoderawtransaction(self.nodes[0].gettransaction(coinbase_txid[0])["hex"])["vout"][0]["value"]
        test1txs = [create_transaction(self.nodes[0], coinbase_txid[0], self.ms_address, amount=49, fee=coinbase_value-49)]
        txid1 = self.nodes[0].sendrawtransaction(bytes_to_hex_str(test1txs[0].serialize_with_witness()), True)
        test1txs.append(create_transaction(self.nodes[0], txid1, self.ms_address, amount=48, fee=49-48))
        txid2 = self.nodes[0].sendrawtransaction(bytes_to_hex_str(test1txs[1].serialize_with_witness()), True)
        coinbase_value = self.nodes[0].decoderawtransaction(self.nodes[0].gettransaction(coinbase_txid[1])["hex"])["vout"][0]["value"]
        test1txs.append(create_transaction(self.nodes[0], coinbase_txid[1], self.wit_ms_address, amount=49, fee=coinbase_value-49))
        txid3 = self.nodes[0].sendrawtransaction(bytes_to_hex_str(test1txs[2].serialize_with_witness()), True)
        self.block_submit(self.nodes[0], test1txs, False, True)

        self.log.info("Test 2: Non-NULLDUMMY base multisig transaction should not be accepted to mempool before activation")
        test2tx = create_transaction(self.nodes[0], txid2, self.ms_address, amount=47, fee=48-47)
        trueDummy(test2tx)
        assert_raises_rpc_error(-26, NULLDUMMY_ERROR, self.nodes[0].sendrawtransaction, bytes_to_hex_str(test2tx.serialize_with_witness()), True)

        self.log.info("Test 3: Non-NULLDUMMY base transactions should be accepted in a block before activation [431]")
        self.block_submit(self.nodes[0], [test2tx], False, True)

        self.log.info("Test 4: Non-NULLDUMMY base multisig transaction is invalid after activation")
        test4tx = create_transaction(self.nodes[0], test2tx.hash, self.address, amount=46, fee=47-46)
        test6txs=[CTransaction(test4tx)]
        trueDummy(test4tx)
        assert_raises_rpc_error(-26, NULLDUMMY_ERROR, self.nodes[0].sendrawtransaction, bytes_to_hex_str(test4tx.serialize_with_witness()), True)
        self.block_submit(self.nodes[0], [test4tx])

        self.log.info("Test 5: Non-NULLDUMMY P2WSH multisig transaction invalid after activation")
        test5tx = create_transaction(self.nodes[0], txid3, self.wit_address, amount=48, fee=49-48)
        test6txs.append(CTransaction(test5tx))
        test5tx.wit.vtxinwit[0].scriptWitness.stack[0] = b'\x01'
        assert_raises_rpc_error(-26, NULLDUMMY_ERROR, self.nodes[0].sendrawtransaction, bytes_to_hex_str(test5tx.serialize_with_witness()), True)
        self.block_submit(self.nodes[0], [test5tx], True)

        self.log.info("Test 6: NULLDUMMY compliant base/witness transactions should be accepted to mempool and in block after activation [432]")
        for i in test6txs:
            self.nodes[0].sendrawtransaction(bytes_to_hex_str(i.serialize_with_witness()), True)
        self.block_submit(self.nodes[0], test6txs, True, True)

def create_bip112txs(node, bip112inputs, varyOP_CSV, txversion, address, locktime_delta=0):
    """Returns a list of bip68 transactions with different bits set."""
    txs = []
    assert(len(bip112inputs) >= 16)
    for i, (sdf, srhb, stf, srlb) in enumerate(product(*[[True, False]] * 4)):
        locktime = relative_locktime(sdf, srhb, stf, srlb)
        tx = create_transaction(node, bip112inputs[i], address, amount=Decimal("49.98"))
        if (varyOP_CSV):  # if varying OP_CSV, nSequence is fixed
            tx.vin[0].nSequence = BASE_RELATIVE_LOCKTIME + locktime_delta
        else:  # vary nSequence instead, OP_CSV is fixed
            tx.vin[0].nSequence = locktime + locktime_delta
        tx.nVersion = txversion
        signtx = sign_transaction(node, tx)
        if (varyOP_CSV):
            signtx.vin[0].scriptSig = CScript([locktime, OP_CHECKSEQUENCEVERIFY, OP_DROP] + list(CScript(signtx.vin[0].scriptSig)))
        else:
            signtx.vin[0].scriptSig = CScript([BASE_RELATIVE_LOCKTIME, OP_CHECKSEQUENCEVERIFY, OP_DROP] + list(CScript(signtx.vin[0].scriptSig)))
        tx.rehash()
        txs.append({'tx': signtx, 'sdf': sdf, 'stf': stf})
    return txs

def create_bip112special(node, input, txversion, address):
    tx = create_transaction(node, input, address, amount=Decimal("49.98"))
    tx.nVersion = txversion
    signtx = sign_transaction(node, tx)
    signtx.vin[0].scriptSig = CScript([-1, OP_CHECKSEQUENCEVERIFY, OP_DROP] + list(CScript(signtx.vin[0].scriptSig)))
    return signtx

    def run_test(self):
        self.nodes[0].add_p2p_connection(P2PDataStore())

        self.log.info("Generate blocks in the past for coinbase outputs.")
        long_past_time = int(time.time()) - 600 * 1000  # enough to build up to 1000 blocks 10 minutes apart without worrying about getting into the future
        self.nodes[0].setmocktime(long_past_time - 100)  # enough so that the generated blocks will still all be before long_past_time
        self.coinbase_blocks = self.nodes[0].generate(1 + 16 + 2 * 32 + 1)  # 82 blocks generated for inputs
        self.nodes[0].setmocktime(0)  # set time back to present so yielded blocks aren't in the future as we advance last_block_time
        self.tipheight = 82  # height of the next block to build
        self.last_block_time = long_past_time
        self.tip = int(self.nodes[0].getbestblockhash(), 16)
        self.nodeaddress = self.nodes[0].getnewaddress()

        self.log.info("Test that the csv softfork is DEFINED")
        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'defined')
        test_blocks = self.generate_blocks(61, 4)
        self.sync_blocks(test_blocks)

        self.log.info("Advance from DEFINED to STARTED, height = 143")
        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'started')

        self.log.info("Fail to achieve LOCKED_IN")
        # 100 out of 144 signal bit 0. Use a variety of bits to simulate multiple parallel softforks

        test_blocks = self.generate_blocks(50, 536870913)  # 0x20000001 (signalling ready)
        test_blocks = self.generate_blocks(20, 4, test_blocks)  # 0x00000004 (signalling not)
        test_blocks = self.generate_blocks(50, 536871169, test_blocks)  # 0x20000101 (signalling ready)
        test_blocks = self.generate_blocks(24, 536936448, test_blocks)  # 0x20010000 (signalling not)
        self.sync_blocks(test_blocks)

        self.log.info("Failed to advance past STARTED, height = 287")
        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'started')

        self.log.info("Generate blocks to achieve LOCK-IN")
        # 108 out of 144 signal bit 0 to achieve lock-in
        # using a variety of bits to simulate multiple parallel softforks
        test_blocks = self.generate_blocks(58, 536870913)  # 0x20000001 (signalling ready)
        test_blocks = self.generate_blocks(26, 4, test_blocks)  # 0x00000004 (signalling not)
        test_blocks = self.generate_blocks(50, 536871169, test_blocks)  # 0x20000101 (signalling ready)
        test_blocks = self.generate_blocks(10, 536936448, test_blocks)  # 0x20010000 (signalling not)
        self.sync_blocks(test_blocks)

        self.log.info("Advanced from STARTED to LOCKED_IN, height = 431")
        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'locked_in')

        # Generate 140 more version 4 blocks
        test_blocks = self.generate_blocks(140, 4)
        self.sync_blocks(test_blocks)

        # Inputs at height = 572
        #
        # Put inputs for all tests in the chain at height 572 (tip now = 571) (time increases by 600s per block)
        # Note we reuse inputs for v1 and v2 txs so must test these separately
        # 16 normal inputs
        bip68inputs = []
        for i in range(16):
            bip68inputs.append(send_generic_input_tx(self.nodes[0], self.coinbase_blocks, self.nodeaddress))

        # 2 sets of 16 inputs with 10 OP_CSV OP_DROP (actually will be prepended to spending scriptSig)
        bip112basicinputs = []
        for j in range(2):
            inputs = []
            for i in range(16):
                inputs.append(send_generic_input_tx(self.nodes[0], self.coinbase_blocks, self.nodeaddress))
            bip112basicinputs.append(inputs)

        # 2 sets of 16 varied inputs with (relative_lock_time) OP_CSV OP_DROP (actually will be prepended to spending scriptSig)
        bip112diverseinputs = []
        for j in range(2):
            inputs = []
            for i in range(16):
                inputs.append(send_generic_input_tx(self.nodes[0], self.coinbase_blocks, self.nodeaddress))
            bip112diverseinputs.append(inputs)

        # 1 special input with -1 OP_CSV OP_DROP (actually will be prepended to spending scriptSig)
        bip112specialinput = send_generic_input_tx(self.nodes[0], self.coinbase_blocks, self.nodeaddress)

        # 1 normal input
        bip113input = send_generic_input_tx(self.nodes[0], self.coinbase_blocks, self.nodeaddress)

        self.nodes[0].setmocktime(self.last_block_time + 600)
        inputblockhash = self.nodes[0].generate(1)[0]  # 1 block generated for inputs to be in chain at height 572
        self.nodes[0].setmocktime(0)
        self.tip = int(inputblockhash, 16)
        self.tipheight += 1
        self.last_block_time += 600
        assert_equal(len(self.nodes[0].getblock(inputblockhash, True)["tx"]), 82 + 1)

        # 2 more version 4 blocks
        test_blocks = self.generate_blocks(2, 4)
        self.sync_blocks(test_blocks)

        self.log.info("Not yet advanced to ACTIVE, height = 574 (will activate for block 576, not 575)")
        assert_equal(get_bip9_status(self.nodes[0], 'csv')['status'], 'locked_in')

        # Test both version 1 and version 2 transactions for all tests
        # BIP113 test transaction will be modified before each use to put in appropriate block time
        bip113tx_v1 = create_transaction(self.nodes[0], bip113input, self.nodeaddress, amount=Decimal("49.98"))
        bip113tx_v1.vin[0].nSequence = 0xFFFFFFFE
        bip113tx_v1.nVersion = 1
#.........这里部分代码省略.........

    def run_test(self):
        self.nodes[0].add_p2p_connection(P2PInterface())

        self.log.info("Mining %d blocks", CLTV_HEIGHT - 2)
        self.coinbase_txids = [self.nodes[0].getblock(b)['tx'][0] for b in self.nodes[0].generate(CLTV_HEIGHT - 2)]
        self.nodeaddress = self.nodes[0].getnewaddress()

        self.log.info("Test that an invalid-according-to-CLTV transaction can still appear in a block")

        spendtx = create_transaction(self.nodes[0], self.coinbase_txids[0],
                self.nodeaddress, amount=1.0)
        cltv_invalidate(spendtx)
        spendtx.rehash()

        tip = self.nodes[0].getbestblockhash()
        block_time = self.nodes[0].getblockheader(tip)['mediantime'] + 1
        block = create_block(int(tip, 16), create_coinbase(CLTV_HEIGHT - 1), block_time)
        block.nVersion = 3
        block.vtx.append(spendtx)
        block.hashMerkleRoot = block.calc_merkle_root()
        block.solve()

        self.nodes[0].p2p.send_and_ping(msg_block(block))
        assert_equal(self.nodes[0].getbestblockhash(), block.hash)

        self.log.info("Test that blocks must now be at least version 4")
        tip = block.sha256
        block_time += 1
        block = create_block(tip, create_coinbase(CLTV_HEIGHT), block_time)
        block.nVersion = 3
        block.solve()

        with self.nodes[0].assert_debug_log(expected_msgs=['{}, bad-version(0x00000003)'.format(block.hash)]):
            self.nodes[0].p2p.send_and_ping(msg_block(block))
            assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
            self.nodes[0].p2p.sync_with_ping()

        self.log.info("Test that invalid-according-to-cltv transactions cannot appear in a block")
        block.nVersion = 4

        spendtx = create_transaction(self.nodes[0], self.coinbase_txids[1],
                self.nodeaddress, amount=1.0)
        cltv_invalidate(spendtx)
        spendtx.rehash()

        # First we show that this tx is valid except for CLTV by getting it
        # rejected from the mempool for exactly that reason.
        assert_equal(
            [{'txid': spendtx.hash, 'allowed': False, 'reject-reason': '64: non-mandatory-script-verify-flag (Negative locktime)'}],
            self.nodes[0].testmempoolaccept(rawtxs=[spendtx.serialize().hex()], maxfeerate=0)
        )

        # Now we verify that a block with this transaction is also invalid.
        block.vtx.append(spendtx)
        block.hashMerkleRoot = block.calc_merkle_root()
        block.solve()

        with self.nodes[0].assert_debug_log(expected_msgs=['CheckInputs on {} failed with non-mandatory-script-verify-flag (Negative locktime)'.format(block.vtx[-1].hash)]):
            self.nodes[0].p2p.send_and_ping(msg_block(block))
            assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
            self.nodes[0].p2p.sync_with_ping()

        self.log.info("Test that a version 4 block with a valid-according-to-CLTV transaction is accepted")
        spendtx = cltv_validate(self.nodes[0], spendtx, CLTV_HEIGHT - 1)
        spendtx.rehash()

        block.vtx.pop(1)
        block.vtx.append(spendtx)
        block.hashMerkleRoot = block.calc_merkle_root()
        block.solve()

        self.nodes[0].p2p.send_and_ping(msg_block(block))
        assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256)

#.........这里部分代码省略.........
        self.log.info("Unrequested block that would complete more-work chain was ignored")

        # 6. Try to get node to request the missing block.
        # Poke the node with an inv for block at height 3 and see if that
        # triggers a getdata on block 2 (it should if block 2 is missing).
        with mininode_lock:
            # Clear state so we can check the getdata request
            test_node.last_message.pop("getdata", None)
            test_node.send_message(msg_inv([CInv(2, block_h3.sha256)]))

        test_node.sync_with_ping()
        with mininode_lock:
            getdata = test_node.last_message["getdata"]

        # Check that the getdata includes the right block
        assert_equal(getdata.inv[0].hash, block_h1f.sha256)
        self.log.info("Inv at tip triggered getdata for unprocessed block")

        # 7. Send the missing block for the third time (now it is requested)
        test_node.send_message(msg_block(block_h1f))

        test_node.sync_with_ping()
        assert_equal(self.nodes[0].getblockcount(), 290)
        self.nodes[0].getblock(all_blocks[286].hash)
        assert_equal(self.nodes[0].getbestblockhash(), all_blocks[286].hash)
        assert_raises_rpc_error(-1, "Block not found on disk", self.nodes[0].getblock, all_blocks[287].hash)
        self.log.info("Successfully reorged to longer chain from non-whitelisted peer")

        # 8. Create a chain which is invalid at a height longer than the
        # current chain, but which has more blocks on top of that
        block_289f = create_block(all_blocks[284].sha256, create_coinbase(289), all_blocks[284].nTime+1)
        block_289f.solve()
        block_290f = create_block(block_289f.sha256, create_coinbase(290), block_289f.nTime+1)
        block_290f.solve()
        block_291 = create_block(block_290f.sha256, create_coinbase(291), block_290f.nTime+1)
        # block_291 spends a coinbase below maturity!
        block_291.vtx.append(create_transaction(block_290f.vtx[0], 0, b"42", 1))
        block_291.hashMerkleRoot = block_291.calc_merkle_root()
        block_291.solve()
        block_292 = create_block(block_291.sha256, create_coinbase(292), block_291.nTime+1)
        block_292.solve()

        # Now send all the headers on the chain and enough blocks to trigger reorg
        headers_message = msg_headers()
        headers_message.headers.append(CBlockHeader(block_289f))
        headers_message.headers.append(CBlockHeader(block_290f))
        headers_message.headers.append(CBlockHeader(block_291))
        headers_message.headers.append(CBlockHeader(block_292))
        test_node.send_message(headers_message)

        test_node.sync_with_ping()
        tip_entry_found = False
        for x in self.nodes[0].getchaintips():
            if x['hash'] == block_292.hash:
                assert_equal(x['status'], "headers-only")
                tip_entry_found = True
        assert(tip_entry_found)
        assert_raises_rpc_error(-1, "Block not found on disk", self.nodes[0].getblock, block_292.hash)

        test_node.send_message(msg_block(block_289f))
        test_node.send_message(msg_block(block_290f))

        test_node.sync_with_ping()
        self.nodes[0].getblock(block_289f.hash)
        self.nodes[0].getblock(block_290f.hash)

        test_node.send_message(msg_block(block_291))

        # At this point we've sent an obviously-bogus block, wait for full processing
        # without assuming whether we will be disconnected or not
        try:
            # Only wait a short while so the test doesn't take forever if we do get
            # disconnected
            test_node.sync_with_ping(timeout=1)
        except AssertionError:
            test_node.wait_for_disconnect()

            self.nodes[0].disconnect_p2ps()
            test_node = self.nodes[0].add_p2p_connection(P2PInterface())

            network_thread_start()
            test_node.wait_for_verack()

        # We should have failed reorg and switched back to 290 (but have block 291)
        assert_equal(self.nodes[0].getblockcount(), 290)
        assert_equal(self.nodes[0].getbestblockhash(), all_blocks[286].hash)
        assert_equal(self.nodes[0].getblock(block_291.hash)["confirmations"], -1)

        # Now send a new header on the invalid chain, indicating we're forked off, and expect to get disconnected
        block_293 = create_block(block_292.sha256, create_coinbase(293), block_292.nTime+1)
        block_293.solve()
        headers_message = msg_headers()
        headers_message.headers.append(CBlockHeader(block_293))
        test_node.send_message(headers_message)
        test_node.wait_for_disconnect()

        # 9. Connect node1 to node0 and ensure it is able to sync
        connect_nodes(self.nodes[0], 1)
        sync_blocks([self.nodes[0], self.nodes[1]])
        self.log.info("Successfully synced nodes 1 and 0")

def send_generic_input_tx(node, coinbases, address):
    return node.sendrawtransaction(ToHex(sign_transaction(node, create_transaction(node, node.getblock(coinbases.pop())['tx'][0], address, amount=Decimal("49.99")))))

    def run_test(self):
        # Add p2p connection to node0
        node = self.nodes[0]  # convenience reference to the node
        node.add_p2p_connection(P2PDataStore())

        network_thread_start()
        node.p2p.wait_for_verack()

        best_block = node.getblock(node.getbestblockhash())
        tip = int(node.getbestblockhash(), 16)
        height = best_block["height"] + 1
        block_time = best_block["time"] + 1

        self.log.info("Create a new block with an anyone-can-spend coinbase")

        height = 1
        block = create_block(tip, create_coinbase(height), block_time)
        block.solve()
        # Save the coinbase for later
        block1 = block
        tip = block.sha256
        node.p2p.send_blocks_and_test([block1], node, True)

        self.log.info("Mature the block.")
        node.generate(100)

        best_block = node.getblock(node.getbestblockhash())
        tip = int(node.getbestblockhash(), 16)
        height = best_block["height"] + 1
        block_time = best_block["time"] + 1

        # Use merkle-root malleability to generate an invalid block with
        # same blockheader.
        # Manufacture a block with 3 transactions (coinbase, spend of prior
        # coinbase, spend of that spend).  Duplicate the 3rd transaction to
        # leave merkle root and blockheader unchanged but invalidate the block.
        self.log.info("Test merkle root malleability.")

        block2 = create_block(tip, create_coinbase(height), block_time)
        block_time += 1

        # b'0x51' is OP_TRUE
        tx1 = create_transaction(block1.vtx[0], 0, b'\x51', 50 * COIN)
        tx2 = create_transaction(tx1, 0, b'\x51', 50 * COIN)

        block2.vtx.extend([tx1, tx2])
        block2.hashMerkleRoot = block2.calc_merkle_root()
        block2.rehash()
        block2.solve()
        orig_hash = block2.sha256
        block2_orig = copy.deepcopy(block2)

        # Mutate block 2
        block2.vtx.append(tx2)
        assert_equal(block2.hashMerkleRoot, block2.calc_merkle_root())
        assert_equal(orig_hash, block2.rehash())
        assert(block2_orig.vtx != block2.vtx)

        node.p2p.send_blocks_and_test([block2], node, False, False, 16, b'bad-txns-duplicate')

        self.log.info("Test very broken block.")

        block3 = create_block(tip, create_coinbase(height), block_time)
        block_time += 1
        block3.vtx[0].vout[0].nValue = 100 * COIN  # Too high!
        block3.vtx[0].sha256 = None
        block3.vtx[0].calc_sha256()
        block3.hashMerkleRoot = block3.calc_merkle_root()
        block3.rehash()
        block3.solve()

        node.p2p.send_blocks_and_test([block3], node, False, False, 16, b'bad-cb-amount')

 def create_spend_tx(self, scriptSig):
     self.tx2 = create_transaction(self.tx1, 0, CScript(), 0)
     self.tx2.vin[0].scriptSig = scriptSig
     self.tx2.vout[0].scriptPubKey = CScript()
     self.tx2.rehash()

    def get_tests(self):
        if self.tip is None:
            self.tip = int ("0x" + self.nodes[0].getbestblockhash() + "L", 0)
        self.block_time = int(time.time())+1

        '''
        Create a new block with an anyone-can-spend coinbase
        '''
        block = create_block(self.tip, create_coinbase(), self.block_time)
        self.block_time += 1
        block.solve()
        # Save the coinbase for later
        self.block1 = block
        self.tip = block.sha256
        yield TestInstance([[block, True]])

        '''
        Now we need that block to mature so we can spend the coinbase.
        '''
        test = TestInstance(sync_every_block=False)
        for i in xrange(100):
            block = create_block(self.tip, create_coinbase(), self.block_time)
            block.solve()
            self.tip = block.sha256
            self.block_time += 1
            test.blocks_and_transactions.append([block, True])
        yield test

        '''
        Now we use merkle-root malleability to generate an invalid block with
        same blockheader.
        Manufacture a block with 3 transactions (coinbase, spend of prior
        coinbase, spend of that spend).  Duplicate the 3rd transaction to 
        leave merkle root and blockheader unchanged but invalidate the block.
        '''
        block2 = create_block(self.tip, create_coinbase(), self.block_time)
        self.block_time += 1

        # chr(81) is OP_TRUE
        tx1 = create_transaction(self.block1.vtx[0], 0, chr(81), 40*100000000)
        tx2 = create_transaction(tx1, 0, chr(81), 40*100000000)

        block2.vtx.extend([tx1, tx2])
        block2.hashMerkleRoot = block2.calc_merkle_root()
        block2.rehash()
        block2.solve()
        orig_hash = block2.sha256
        block2_orig = copy.deepcopy(block2)

        # Mutate block 2
        block2.vtx.append(tx2)
        assert_equal(block2.hashMerkleRoot, block2.calc_merkle_root())
        assert_equal(orig_hash, block2.rehash())
        assert(block2_orig.vtx != block2.vtx)

        self.tip = block2.sha256
        yield TestInstance([[block2, False], [block2_orig, True]])

        '''
        Make sure that a totally screwed up block is not valid.
        '''
        block3 = create_block(self.tip, create_coinbase(), self.block_time)
        self.block_time += 1
        block3.vtx[0].vout[0].nValue = 100*100000000 # Too high!
        block3.vtx[0].sha256=None
        block3.vtx[0].calc_sha256()
        block3.hashMerkleRoot = block3.calc_merkle_root()
        block3.rehash()
        block3.solve()

        yield TestInstance([[block3, False]])

    def run_test(self):
        self.nodes[0].add_p2p_connection(P2PInterface())

        self.log.info("Mining %d blocks", CLTV_HEIGHT - 2)
        self.coinbase_txids = [self.nodes[0].getblock(b)['tx'][0] for b in self.nodes[0].generate(CLTV_HEIGHT - 2)]
        self.nodeaddress = self.nodes[0].getnewaddress()

        self.log.info("Test that an invalid-according-to-CLTV transaction can still appear in a block")

        spendtx = create_transaction(self.nodes[0], self.coinbase_txids[0],
                self.nodeaddress, amount=1.0)
        cltv_invalidate(spendtx)
        spendtx.rehash()

        tip = self.nodes[0].getbestblockhash()
        block_time = self.nodes[0].getblockheader(tip)['mediantime'] + 1
        block = create_block(int(tip, 16), create_coinbase(CLTV_HEIGHT - 1), block_time)
        block.nVersion = 3
        block.vtx.append(spendtx)
        block.hashMerkleRoot = block.calc_merkle_root()
        block.solve()

        self.nodes[0].p2p.send_and_ping(msg_block(block))
        assert_equal(self.nodes[0].getbestblockhash(), block.hash)

        self.log.info("Test that blocks must now be at least version 4")
        tip = block.sha256
        block_time += 1
        block = create_block(tip, create_coinbase(CLTV_HEIGHT), block_time)
        block.nVersion = 3
        block.solve()
        self.nodes[0].p2p.send_and_ping(msg_block(block))
        assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)

        wait_until(lambda: "reject" in self.nodes[0].p2p.last_message.keys(), lock=mininode_lock)
        with mininode_lock:
            assert_equal(self.nodes[0].p2p.last_message["reject"].code, REJECT_OBSOLETE)
            assert_equal(self.nodes[0].p2p.last_message["reject"].reason, b'bad-version(0x00000003)')
            assert_equal(self.nodes[0].p2p.last_message["reject"].data, block.sha256)
            del self.nodes[0].p2p.last_message["reject"]

        self.log.info("Test that invalid-according-to-cltv transactions cannot appear in a block")
        block.nVersion = 4

        spendtx = create_transaction(self.nodes[0], self.coinbase_txids[1],
                self.nodeaddress, amount=1.0)
        cltv_invalidate(spendtx)
        spendtx.rehash()

        # First we show that this tx is valid except for CLTV by getting it
        # rejected from the mempool for exactly that reason.
        assert_equal(
            [{'txid': spendtx.hash, 'allowed': False, 'reject-reason': '64: non-mandatory-script-verify-flag (Negative locktime)'}],
            self.nodes[0].testmempoolaccept(rawtxs=[bytes_to_hex_str(spendtx.serialize())], allowhighfees=True)
        )

        # Now we verify that a block with this transaction is also invalid.
        block.vtx.append(spendtx)
        block.hashMerkleRoot = block.calc_merkle_root()
        block.solve()

        self.nodes[0].p2p.send_and_ping(msg_block(block))
        assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)

        wait_until(lambda: "reject" in self.nodes[0].p2p.last_message.keys(), lock=mininode_lock)
        with mininode_lock:
            assert self.nodes[0].p2p.last_message["reject"].code in [REJECT_INVALID, REJECT_NONSTANDARD]
            assert_equal(self.nodes[0].p2p.last_message["reject"].data, block.sha256)
            if self.nodes[0].p2p.last_message["reject"].code == REJECT_INVALID:
                # Generic rejection when a block is invalid
                assert_equal(self.nodes[0].p2p.last_message["reject"].reason, b'block-validation-failed')
            else:
                assert b'Negative locktime' in self.nodes[0].p2p.last_message["reject"].reason

        self.log.info("Test that a version 4 block with a valid-according-to-CLTV transaction is accepted")
        spendtx = cltv_validate(self.nodes[0], spendtx, CLTV_HEIGHT - 1)
        spendtx.rehash()

        block.vtx.pop(1)
        block.vtx.append(spendtx)
        block.hashMerkleRoot = block.calc_merkle_root()
        block.solve()

        self.nodes[0].p2p.send_and_ping(msg_block(block))
        assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256)

    def run_test(self):
        self.nodes[0].add_p2p_connection(P2PInterface())

        self.log.info("Mining %d blocks", DERSIG_HEIGHT - 2)
        self.coinbase_txids = [self.nodes[0].getblock(b)['tx'][0] for b in self.nodes[0].generate(DERSIG_HEIGHT - 2)]
        self.nodeaddress = self.nodes[0].getnewaddress()

        self.log.info("Test that a transaction with non-DER signature can still appear in a block")

        spendtx = create_transaction(self.nodes[0], self.coinbase_txids[0],
                self.nodeaddress, amount=1.0)
        unDERify(spendtx)
        spendtx.rehash()

        tip = self.nodes[0].getbestblockhash()
        block_time = self.nodes[0].getblockheader(tip)['mediantime'] + 1
        block = create_block(int(tip, 16), create_coinbase(DERSIG_HEIGHT - 1), block_time)
        block.nVersion = 2
        block.vtx.append(spendtx)
        block.hashMerkleRoot = block.calc_merkle_root()
        block.rehash()
        block.solve()

        self.nodes[0].p2p.send_and_ping(msg_block(block))
        assert_equal(self.nodes[0].getbestblockhash(), block.hash)

        self.log.info("Test that blocks must now be at least version 3")
        tip = block.sha256
        block_time += 1
        block = create_block(tip, create_coinbase(DERSIG_HEIGHT), block_time)
        block.nVersion = 2
        block.rehash()
        block.solve()

        with self.nodes[0].assert_debug_log(expected_msgs=['{}, bad-version(0x00000002)'.format(block.hash)]):
            self.nodes[0].p2p.send_and_ping(msg_block(block))
            assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
            self.nodes[0].p2p.sync_with_ping()

        self.log.info("Test that transactions with non-DER signatures cannot appear in a block")
        block.nVersion = 3

        spendtx = create_transaction(self.nodes[0], self.coinbase_txids[1],
                self.nodeaddress, amount=1.0)
        unDERify(spendtx)
        spendtx.rehash()

        # First we show that this tx is valid except for DERSIG by getting it
        # rejected from the mempool for exactly that reason.
        assert_equal(
            [{'txid': spendtx.hash, 'allowed': False, 'reject-reason': '64: non-mandatory-script-verify-flag (Non-canonical DER signature)'}],
            self.nodes[0].testmempoolaccept(rawtxs=[bytes_to_hex_str(spendtx.serialize())], allowhighfees=True)
        )

        # Now we verify that a block with this transaction is also invalid.
        block.vtx.append(spendtx)
        block.hashMerkleRoot = block.calc_merkle_root()
        block.rehash()
        block.solve()

        with self.nodes[0].assert_debug_log(expected_msgs=['CheckInputs on {} failed with non-mandatory-script-verify-flag (Non-canonical DER signature)'.format(block.vtx[-1].hash)]):
            self.nodes[0].p2p.send_and_ping(msg_block(block))
            assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
            self.nodes[0].p2p.sync_with_ping()

        wait_until(lambda: "reject" in self.nodes[0].p2p.last_message.keys(), lock=mininode_lock)
        with mininode_lock:
            assert self.nodes[0].p2p.last_message["reject"].code in [REJECT_INVALID, REJECT_NONSTANDARD]
            assert_equal(self.nodes[0].p2p.last_message["reject"].data, block.sha256)
            assert b'Non-canonical DER signature' in self.nodes[0].p2p.last_message["reject"].reason

        self.log.info("Test that a version 3 block with a DERSIG-compliant transaction is accepted")
        block.vtx[1] = create_transaction(self.nodes[0], self.coinbase_txids[1], self.nodeaddress, amount=1.0)
        block.hashMerkleRoot = block.calc_merkle_root()
        block.rehash()
        block.solve()

        self.nodes[0].p2p.send_and_ping(msg_block(block))
        assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256)