mirror of https://github.com/bitcoin/bitcoin.git
198 lines
9.1 KiB
Python
Executable File
198 lines
9.1 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2014-2022 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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"""Test mempool re-org scenarios.
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Test re-org scenarios with a mempool that contains transactions
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that spend (directly or indirectly) coinbase transactions.
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"""
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import time
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from test_framework.messages import (
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CInv,
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MSG_WTX,
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msg_getdata,
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)
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from test_framework.p2p import (
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P2PTxInvStore,
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p2p_lock,
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)
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_equal, assert_raises_rpc_error
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from test_framework.wallet import MiniWallet
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class MempoolCoinbaseTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 2
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self.extra_args = [
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[
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'-whitelist=noban@127.0.0.1', # immediate tx relay
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],
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[]
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]
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def test_reorg_relay(self):
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self.log.info("Test that transactions from disconnected blocks are available for relay immediately")
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# Prevent time from moving forward
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self.nodes[1].setmocktime(int(time.time()))
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self.connect_nodes(0, 1)
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self.generate(self.wallet, 3)
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# Disconnect node0 and node1 to create different chains.
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self.disconnect_nodes(0, 1)
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# Connect a peer to node1, which doesn't have immediate tx relay
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peer1 = self.nodes[1].add_p2p_connection(P2PTxInvStore())
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# Create a transaction that is included in a block.
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tx_disconnected = self.wallet.send_self_transfer(from_node=self.nodes[1])
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self.generate(self.nodes[1], 1, sync_fun=self.no_op)
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# Create a transaction and submit it to node1's mempool.
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tx_before_reorg = self.wallet.send_self_transfer(from_node=self.nodes[1])
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# Create a child of that transaction and submit it to node1's mempool.
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tx_child = self.wallet.send_self_transfer(utxo_to_spend=tx_disconnected["new_utxo"], from_node=self.nodes[1])
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assert_equal(self.nodes[1].getmempoolentry(tx_child["txid"])["ancestorcount"], 1)
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assert_equal(len(peer1.get_invs()), 0)
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# node0 has a longer chain in which tx_disconnected was not confirmed.
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self.generate(self.nodes[0], 3, sync_fun=self.no_op)
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# Reconnect the nodes and sync chains. node0's chain should win.
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self.connect_nodes(0, 1)
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self.sync_blocks()
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# Child now has an ancestor from the disconnected block
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assert_equal(self.nodes[1].getmempoolentry(tx_child["txid"])["ancestorcount"], 2)
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assert_equal(self.nodes[1].getmempoolentry(tx_before_reorg["txid"])["ancestorcount"], 1)
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# peer1 should not have received an inv for any of the transactions during this time, as no
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# mocktime has elapsed for those transactions to be announced. Likewise, it cannot
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# request very recent, unanounced transactions.
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assert_equal(len(peer1.get_invs()), 0)
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# It's too early to request these two transactions
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requests_too_recent = msg_getdata([CInv(t=MSG_WTX, h=int(tx["tx"].getwtxid(), 16)) for tx in [tx_before_reorg, tx_child]])
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peer1.send_and_ping(requests_too_recent)
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for _ in range(len(requests_too_recent.inv)):
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peer1.sync_with_ping()
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with p2p_lock:
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assert "tx" not in peer1.last_message
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assert "notfound" in peer1.last_message
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# Request the tx from the disconnected block
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request_disconnected_tx = msg_getdata([CInv(t=MSG_WTX, h=int(tx_disconnected["tx"].getwtxid(), 16))])
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peer1.send_and_ping(request_disconnected_tx)
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# The tx from the disconnected block was never announced, and it entered the mempool later
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# than the transactions that are too recent.
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assert_equal(len(peer1.get_invs()), 0)
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with p2p_lock:
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# However, the node will answer requests for the tx from the recently-disconnected block.
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assert_equal(peer1.last_message["tx"].tx.getwtxid(),tx_disconnected["tx"].getwtxid())
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self.nodes[1].setmocktime(int(time.time()) + 300)
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peer1.sync_with_ping()
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# the transactions are now announced
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assert_equal(len(peer1.get_invs()), 3)
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for _ in range(3):
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# make sure all tx requests have been responded to
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peer1.sync_with_ping()
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last_tx_received = peer1.last_message["tx"]
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tx_after_reorg = self.wallet.send_self_transfer(from_node=self.nodes[1])
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request_after_reorg = msg_getdata([CInv(t=MSG_WTX, h=int(tx_after_reorg["tx"].getwtxid(), 16))])
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assert tx_after_reorg["txid"] in self.nodes[1].getrawmempool()
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peer1.send_and_ping(request_after_reorg)
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with p2p_lock:
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assert_equal(peer1.last_message["tx"], last_tx_received)
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def run_test(self):
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self.wallet = MiniWallet(self.nodes[0])
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wallet = self.wallet
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# Start with a 200 block chain
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assert_equal(self.nodes[0].getblockcount(), 200)
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self.log.info("Add 4 coinbase utxos to the miniwallet")
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# Block 76 contains the first spendable coinbase txs.
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first_block = 76
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# Three scenarios for re-orging coinbase spends in the memory pool:
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# 1. Direct coinbase spend : spend_1
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# 2. Indirect (coinbase spend in chain, child in mempool) : spend_2 and spend_2_1
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# 3. Indirect (coinbase and child both in chain) : spend_3 and spend_3_1
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# Use invalidateblock to make all of the above coinbase spends invalid (immature coinbase),
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# and make sure the mempool code behaves correctly.
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b = [self.nodes[0].getblockhash(n) for n in range(first_block, first_block+4)]
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coinbase_txids = [self.nodes[0].getblock(h)['tx'][0] for h in b]
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utxo_1 = wallet.get_utxo(txid=coinbase_txids[1])
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utxo_2 = wallet.get_utxo(txid=coinbase_txids[2])
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utxo_3 = wallet.get_utxo(txid=coinbase_txids[3])
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self.log.info("Create three transactions spending from coinbase utxos: spend_1, spend_2, spend_3")
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spend_1 = wallet.create_self_transfer(utxo_to_spend=utxo_1)
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spend_2 = wallet.create_self_transfer(utxo_to_spend=utxo_2)
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spend_3 = wallet.create_self_transfer(utxo_to_spend=utxo_3)
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self.log.info("Create another transaction which is time-locked to two blocks in the future")
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utxo = wallet.get_utxo(txid=coinbase_txids[0])
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timelock_tx = wallet.create_self_transfer(
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utxo_to_spend=utxo,
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locktime=self.nodes[0].getblockcount() + 2,
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)['hex']
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self.log.info("Check that the time-locked transaction is too immature to spend")
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assert_raises_rpc_error(-26, "non-final", self.nodes[0].sendrawtransaction, timelock_tx)
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self.log.info("Broadcast and mine spend_2 and spend_3")
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wallet.sendrawtransaction(from_node=self.nodes[0], tx_hex=spend_2['hex'])
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wallet.sendrawtransaction(from_node=self.nodes[0], tx_hex=spend_3['hex'])
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self.log.info("Generate a block")
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self.generate(self.nodes[0], 1)
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self.log.info("Check that time-locked transaction is still too immature to spend")
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assert_raises_rpc_error(-26, 'non-final', self.nodes[0].sendrawtransaction, timelock_tx)
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self.log.info("Create spend_2_1 and spend_3_1")
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spend_2_1 = wallet.create_self_transfer(utxo_to_spend=spend_2["new_utxo"])
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spend_3_1 = wallet.create_self_transfer(utxo_to_spend=spend_3["new_utxo"])
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self.log.info("Broadcast and mine spend_3_1")
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spend_3_1_id = self.nodes[0].sendrawtransaction(spend_3_1['hex'])
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self.log.info("Generate a block")
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last_block = self.generate(self.nodes[0], 1)
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# generate() implicitly syncs blocks, so that peer 1 gets the block before timelock_tx
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# Otherwise, peer 1 would put the timelock_tx in m_recent_rejects
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self.log.info("The time-locked transaction can now be spent")
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timelock_tx_id = self.nodes[0].sendrawtransaction(timelock_tx)
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self.log.info("Add spend_1 and spend_2_1 to the mempool")
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spend_1_id = self.nodes[0].sendrawtransaction(spend_1['hex'])
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spend_2_1_id = self.nodes[0].sendrawtransaction(spend_2_1['hex'])
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assert_equal(set(self.nodes[0].getrawmempool()), {spend_1_id, spend_2_1_id, timelock_tx_id})
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self.sync_all()
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self.log.info("invalidate the last block")
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for node in self.nodes:
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node.invalidateblock(last_block[0])
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self.log.info("The time-locked transaction is now too immature and has been removed from the mempool")
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self.log.info("spend_3_1 has been re-orged out of the chain and is back in the mempool")
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assert_equal(set(self.nodes[0].getrawmempool()), {spend_1_id, spend_2_1_id, spend_3_1_id})
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self.log.info("Use invalidateblock to re-org back and make all those coinbase spends immature/invalid")
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b = self.nodes[0].getblockhash(first_block + 100)
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for node in self.nodes:
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node.invalidateblock(b)
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self.log.info("Check that the mempool is empty")
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assert_equal(set(self.nodes[0].getrawmempool()), set())
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self.sync_all()
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self.test_reorg_relay()
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if __name__ == '__main__':
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MempoolCoinbaseTest().main()
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