266 lines
10 KiB
266 lines
10 KiB
#!/usr/bin/env python3 |
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# Copyright (c) 2015-2016 The Bitcoin Core developers |
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# Distributed under the MIT software license, see the accompanying |
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# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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from test_framework.mininode import * |
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from test_framework.test_framework import BitcoinTestFramework |
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from test_framework.util import * |
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import time |
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''' |
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Test behavior of -maxuploadtarget. |
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* Verify that getdata requests for old blocks (>1week) are dropped |
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if uploadtarget has been reached. |
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* Verify that getdata requests for recent blocks are respecteved even |
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if uploadtarget has been reached. |
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* Verify that the upload counters are reset after 24 hours. |
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''' |
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# TestNode: bare-bones "peer". Used mostly as a conduit for a test to sending |
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# p2p messages to a node, generating the messages in the main testing logic. |
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class TestNode(NodeConnCB): |
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def __init__(self): |
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NodeConnCB.__init__(self) |
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self.connection = None |
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self.ping_counter = 1 |
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self.last_pong = msg_pong() |
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self.block_receive_map = {} |
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def add_connection(self, conn): |
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self.connection = conn |
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self.peer_disconnected = False |
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def on_inv(self, conn, message): |
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pass |
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# Track the last getdata message we receive (used in the test) |
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def on_getdata(self, conn, message): |
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self.last_getdata = message |
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def on_block(self, conn, message): |
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message.block.calc_sha256() |
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try: |
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self.block_receive_map[message.block.sha256] += 1 |
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except KeyError as e: |
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self.block_receive_map[message.block.sha256] = 1 |
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# Spin until verack message is received from the node. |
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# We use this to signal that our test can begin. This |
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# is called from the testing thread, so it needs to acquire |
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# the global lock. |
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def wait_for_verack(self): |
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def veracked(): |
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return self.verack_received |
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return wait_until(veracked, timeout=10) |
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def wait_for_disconnect(self): |
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def disconnected(): |
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return self.peer_disconnected |
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return wait_until(disconnected, timeout=10) |
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# Wrapper for the NodeConn's send_message function |
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def send_message(self, message): |
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self.connection.send_message(message) |
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def on_pong(self, conn, message): |
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self.last_pong = message |
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def on_close(self, conn): |
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self.peer_disconnected = True |
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# Sync up with the node after delivery of a block |
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def sync_with_ping(self, timeout=30): |
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def received_pong(): |
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return (self.last_pong.nonce == self.ping_counter) |
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self.connection.send_message(msg_ping(nonce=self.ping_counter)) |
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success = wait_until(received_pong, timeout) |
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self.ping_counter += 1 |
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return success |
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class MaxUploadTest(BitcoinTestFramework): |
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def add_options(self, parser): |
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parser.add_option("--testbinary", dest="testbinary", |
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default=os.getenv("BITCOIND", "bitcoind"), |
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help="bitcoind binary to test") |
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def __init__(self): |
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super().__init__() |
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self.setup_clean_chain = True |
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self.num_nodes = 1 |
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self.utxo = [] |
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self.txouts = gen_return_txouts() |
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def setup_network(self): |
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# Start a node with maxuploadtarget of 200 MB (/24h) |
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self.nodes = [] |
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self.nodes.append(start_node(0, self.options.tmpdir, ["-debug", "-maxuploadtarget=200", "-blockmaxsize=999000"])) |
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def mine_full_block(self, node, address): |
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# Want to create a full block |
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# We'll generate a 66k transaction below, and 14 of them is close to the 1MB block limit |
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for j in range(14): |
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if len(self.utxo) < 14: |
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self.utxo = node.listunspent() |
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inputs=[] |
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outputs = {} |
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t = self.utxo.pop() |
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inputs.append({ "txid" : t["txid"], "vout" : t["vout"]}) |
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remchange = t["amount"] - Decimal("0.001000") |
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outputs[address]=remchange |
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# Create a basic transaction that will send change back to ourself after account for a fee |
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# And then insert the 128 generated transaction outs in the middle rawtx[92] is where the # |
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# of txouts is stored and is the only thing we overwrite from the original transaction |
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rawtx = node.createrawtransaction(inputs, outputs) |
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newtx = rawtx[0:92] |
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newtx = newtx + self.txouts |
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newtx = newtx + rawtx[94:] |
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# Appears to be ever so slightly faster to sign with SIGHASH_NONE |
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signresult = node.signrawtransaction(newtx,None,None,"NONE") |
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txid = node.sendrawtransaction(signresult["hex"], True) |
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# Mine a full sized block which will be these transactions we just created |
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node.generate(1) |
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def run_test(self): |
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# Before we connect anything, we first set the time on the node |
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# to be in the past, otherwise things break because the CNode |
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# time counters can't be reset backward after initialization |
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old_time = int(time.time() - 2*60*60*24*7) |
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self.nodes[0].setmocktime(old_time) |
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# Generate some old blocks |
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self.nodes[0].generate(130) |
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# test_nodes[0] will only request old blocks |
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# test_nodes[1] will only request new blocks |
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# test_nodes[2] will test resetting the counters |
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test_nodes = [] |
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connections = [] |
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for i in range(3): |
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test_nodes.append(TestNode()) |
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], test_nodes[i])) |
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test_nodes[i].add_connection(connections[i]) |
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NetworkThread().start() # Start up network handling in another thread |
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[x.wait_for_verack() for x in test_nodes] |
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# Test logic begins here |
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# Now mine a big block |
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self.mine_full_block(self.nodes[0], self.nodes[0].getnewaddress()) |
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# Store the hash; we'll request this later |
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big_old_block = self.nodes[0].getbestblockhash() |
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old_block_size = self.nodes[0].getblock(big_old_block, True)['size'] |
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big_old_block = int(big_old_block, 16) |
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# Advance to two days ago |
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self.nodes[0].setmocktime(int(time.time()) - 2*60*60*24) |
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# Mine one more block, so that the prior block looks old |
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self.mine_full_block(self.nodes[0], self.nodes[0].getnewaddress()) |
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# We'll be requesting this new block too |
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big_new_block = self.nodes[0].getbestblockhash() |
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new_block_size = self.nodes[0].getblock(big_new_block)['size'] |
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big_new_block = int(big_new_block, 16) |
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# test_nodes[0] will test what happens if we just keep requesting the |
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# the same big old block too many times (expect: disconnect) |
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getdata_request = msg_getdata() |
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getdata_request.inv.append(CInv(2, big_old_block)) |
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max_bytes_per_day = 200*1024*1024 |
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daily_buffer = 144 * MAX_BLOCK_SIZE |
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max_bytes_available = max_bytes_per_day - daily_buffer |
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success_count = max_bytes_available // old_block_size |
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# 144MB will be reserved for relaying new blocks, so expect this to |
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# succeed for ~70 tries. |
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for i in range(success_count): |
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test_nodes[0].send_message(getdata_request) |
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test_nodes[0].sync_with_ping() |
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assert_equal(test_nodes[0].block_receive_map[big_old_block], i+1) |
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assert_equal(len(self.nodes[0].getpeerinfo()), 3) |
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# At most a couple more tries should succeed (depending on how long |
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# the test has been running so far). |
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for i in range(3): |
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test_nodes[0].send_message(getdata_request) |
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test_nodes[0].wait_for_disconnect() |
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assert_equal(len(self.nodes[0].getpeerinfo()), 2) |
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print("Peer 0 disconnected after downloading old block too many times") |
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# Requesting the current block on test_nodes[1] should succeed indefinitely, |
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# even when over the max upload target. |
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# We'll try 200 times |
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getdata_request.inv = [CInv(2, big_new_block)] |
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for i in range(200): |
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test_nodes[1].send_message(getdata_request) |
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test_nodes[1].sync_with_ping() |
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assert_equal(test_nodes[1].block_receive_map[big_new_block], i+1) |
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print("Peer 1 able to repeatedly download new block") |
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# But if test_nodes[1] tries for an old block, it gets disconnected too. |
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getdata_request.inv = [CInv(2, big_old_block)] |
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test_nodes[1].send_message(getdata_request) |
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test_nodes[1].wait_for_disconnect() |
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assert_equal(len(self.nodes[0].getpeerinfo()), 1) |
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print("Peer 1 disconnected after trying to download old block") |
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print("Advancing system time on node to clear counters...") |
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# If we advance the time by 24 hours, then the counters should reset, |
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# and test_nodes[2] should be able to retrieve the old block. |
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self.nodes[0].setmocktime(int(time.time())) |
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test_nodes[2].sync_with_ping() |
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test_nodes[2].send_message(getdata_request) |
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test_nodes[2].sync_with_ping() |
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assert_equal(test_nodes[2].block_receive_map[big_old_block], 1) |
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print("Peer 2 able to download old block") |
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[c.disconnect_node() for c in connections] |
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#stop and start node 0 with 1MB maxuploadtarget, whitelist 127.0.0.1 |
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print("Restarting nodes with -whitelist=127.0.0.1") |
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stop_node(self.nodes[0], 0) |
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self.nodes[0] = start_node(0, self.options.tmpdir, ["-debug", "-whitelist=127.0.0.1", "-maxuploadtarget=1", "-blockmaxsize=999000"]) |
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#recreate/reconnect 3 test nodes |
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test_nodes = [] |
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connections = [] |
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for i in range(3): |
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test_nodes.append(TestNode()) |
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], test_nodes[i])) |
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test_nodes[i].add_connection(connections[i]) |
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NetworkThread().start() # Start up network handling in another thread |
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[x.wait_for_verack() for x in test_nodes] |
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#retrieve 20 blocks which should be enough to break the 1MB limit |
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getdata_request.inv = [CInv(2, big_new_block)] |
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for i in range(20): |
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test_nodes[1].send_message(getdata_request) |
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test_nodes[1].sync_with_ping() |
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assert_equal(test_nodes[1].block_receive_map[big_new_block], i+1) |
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getdata_request.inv = [CInv(2, big_old_block)] |
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test_nodes[1].send_message(getdata_request) |
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test_nodes[1].wait_for_disconnect() |
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assert_equal(len(self.nodes[0].getpeerinfo()), 3) #node is still connected because of the whitelist |
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print("Peer 1 still connected after trying to download old block (whitelisted)") |
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[c.disconnect_node() for c in connections] |
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if __name__ == '__main__': |
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MaxUploadTest().main()
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