12202c61bb
The pruning test was outdated in that it was written to test BTC's 288
MIN_BLOCKS_TO_KEEP and 550 MiB MIN_DISK_SPACE_FOR_BLOCK_FILES.
To fix we recalculate arithmetic to accomodate our corresponding 1440
MIN_BLOCKS_TO_KEEP and 2200 MiB MIN_DISK_SPACE_FOR_BLOCK_FILES which
is representative as minimum val we can pass to configure a node to
automatically prune: -prune=2200.
Copied mine_large_blocks from 03d6d238 to speed up the test.
Separated the manual testing from the main test because the values
depend on Bitcoin configuration.
495 lines
22 KiB
Python
Executable file
495 lines
22 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2014-2016 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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#
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# Test pruning code
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# ********
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# WARNING:
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# This test uses 21GB of disk space.
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# This test takes 20 mins or more (up to 2 hours)
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# ********
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from test_framework.blocktools import create_coinbase
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from test_framework.mininode import CBlock
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from test_framework.script import (
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CScript,
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OP_NOP,
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OP_RETURN,
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)
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import (
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start_node,
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connect_nodes,
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sync_blocks,
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assert_equal,
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assert_greater_than,
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assert_raises_jsonrpc,
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)
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import time
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import os
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# Rescans start at the earliest block up to 2 hours before a key timestamp, so
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# the manual prune RPC avoids pruning blocks in the same window to be
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# compatible with pruning based on key creation time.
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RESCAN_WINDOW = 2 * 60 * 60
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def mine_large_blocks(node, n):
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# Make a large scriptPubKey for the coinbase transaction. This is OP_RETURN
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# followed by 950k of OP_NOP. This would be non-standard in a non-coinbase
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# transaction but is consensus valid.
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# Set the nTime if this is the first time this function has been called.
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# A static variable ensures that time is monotonicly increasing and is therefore
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# different for each block created => blockhash is unique.
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if "nTimes" not in mine_large_blocks.__dict__:
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mine_large_blocks.nTime = 0
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# Get the block parameters for the first block
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big_script = CScript([OP_RETURN] + [OP_NOP] * 950000)
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best_block = node.getblock(node.getbestblockhash())
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height = int(best_block["height"]) + 1
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mine_large_blocks.nTime = max(mine_large_blocks.nTime, int(best_block["time"])) + 1
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previousblockhash = int(best_block["hash"], 16)
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for _ in range(n):
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# Build the coinbase transaction (with large scriptPubKey)
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coinbase_tx = create_coinbase(height)
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coinbase_tx.vin[0].nSequence = 2 ** 32 - 1
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coinbase_tx.vout[0].scriptPubKey = big_script
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coinbase_tx.rehash()
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# Build the block
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block = CBlock()
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block.nVersion = 0x620004
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block.hashPrevBlock = previousblockhash
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block.nTime = mine_large_blocks.nTime
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block.nBits = int('207fffff', 16)
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block.nNonce = 0
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block.vtx = [coinbase_tx]
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block.hashMerkleRoot = block.calc_merkle_root()
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block.calc_sha256()
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block.solve()
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# Submit to the node
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node.submitblock(block.serialize().hex())
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previousblockhash = block.sha256
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height += 1
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mine_large_blocks.nTime += 1
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def calc_usage(blockdir):
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return sum(os.path.getsize(blockdir+f) for f in os.listdir(blockdir) if os.path.isfile(blockdir+f)) / (1024. * 1024.)
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class PruneTest(BitcoinTestFramework):
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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 = 6
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def setup_network(self):
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self.nodes = []
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self.is_network_split = False
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# Create nodes 0 and 1 to mine
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self.nodes.append(start_node(0, self.options.tmpdir, ["-debug", "-maxreceivebuffer=20000"], timewait=1200))
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self.nodes.append(start_node(1, self.options.tmpdir, ["-debug", "-maxreceivebuffer=20000"], timewait=1200))
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# Create node 2 to test pruning
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self.nodes.append(start_node(2, self.options.tmpdir, ["-debug", "-maxreceivebuffer=20000", "-prune=2200"], timewait=1200))
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self.prunedir = self.options.tmpdir+"/node2/regtest/blocks/"
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# Create nodes 3 and 4 to test manual pruning (they will be re-started with manual pruning later)
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self.nodes.append(start_node(3, self.options.tmpdir, ["-debug=0", "-maxreceivebuffer=20000"], timewait=1200))
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self.nodes.append(start_node(4, self.options.tmpdir, ["-debug=0", "-maxreceivebuffer=20000"], timewait=1200))
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# Create nodes 5 to test wallet in prune mode, but do not connect
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self.nodes.append(start_node(5, self.options.tmpdir, ["-debug=0", "-prune=2200"]))
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# Determine default relay fee
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self.relayfee = self.nodes[0].getnetworkinfo()["relayfee"]
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connect_nodes(self.nodes[0], 1)
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connect_nodes(self.nodes[1], 2)
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connect_nodes(self.nodes[2], 0)
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connect_nodes(self.nodes[3], 4)
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sync_blocks(self.nodes[0:5])
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def create_big_chain(self):
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# Start by creating some coinbases we can spend later
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self.nodes[1].generate(200)
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sync_blocks(self.nodes[0:2])
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self.nodes[0].generate(150)
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# Then mine enough full blocks to create more than 2200MiB of data
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mine_large_blocks(self.nodes[0], 2395)
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sync_blocks(self.nodes[0:2])
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# Note: Separated the manual testing from the main test
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# This can and should be improved in the future
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mine_large_blocks(self.nodes[3], 995)
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mine_large_blocks(self.nodes[4], 995)
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def test_height_min(self):
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if not os.path.isfile(self.prunedir+"blk00000.dat"):
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raise AssertionError("blk00000.dat is missing, pruning too early")
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print("Success")
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print("Though we're already using more than 2200MiB, current usage:", calc_usage(self.prunedir))
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print("Mining 20 more blocks should cause the first block file to be pruned")
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# Pruning doesn't run until we're allocating another chunk, 20 full blocks past the height cutoff will ensure this
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mine_large_blocks(self.nodes[0], 20)
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waitstart = time.time()
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while os.path.isfile(self.prunedir+"blk00000.dat"):
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time.sleep(0.1)
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if time.time() - waitstart > 30:
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raise AssertionError("blk00000.dat not pruned when it should be")
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print("Success")
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usage = calc_usage(self.prunedir)
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print("Usage should be below target:", usage)
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if (usage > 2200):
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raise AssertionError("Pruning target not being met")
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def create_chain_with_staleblocks(self):
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# Create stale blocks in manageable sized chunks
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print("Mine 24 (stale) blocks on Node 1, followed by 25 (main chain) block reorg from Node 0, for 12 rounds")
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for j in range(12):
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# Disconnect node 0 so it can mine a longer reorg chain without knowing about node 1's soon-to-be-stale chain
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# Node 2 stays connected, so it hears about the stale blocks and then reorg's when node0 reconnects
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# Stopping node 0 also clears its mempool, so it doesn't have node1's transactions to accidentally mine
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self.stop_node(0)
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self.nodes[0]=start_node(0, self.options.tmpdir, ["-debug","-maxreceivebuffer=20000", "-checkblocks=6"], timewait=1200)
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# Mine 24 blocks in node 1
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mine_large_blocks(self.nodes[1], 24)
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# Reorg back with 25 block chain from node 0
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mine_large_blocks(self.nodes[0], 25)
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# Create connections in the order so both nodes can see the reorg at the same time
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connect_nodes(self.nodes[1], 0)
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connect_nodes(self.nodes[2], 0)
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sync_blocks(self.nodes[0:3])
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print("Usage can be over target because of high stale rate:", calc_usage(self.prunedir))
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def reorg_test(self):
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# Node 1 will mine a 1441 block chain starting 1439 blocks back from Node 0 and Node 2's tip
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# This will cause Node 2 to do a reorg requiring 1440 blocks of undo data to the reorg_test chain
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# Reboot node 1 to clear its mempool (hopefully make the invalidate faster)
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# Lower the block max size so we don't keep mining all our big mempool transactions (from disconnected blocks)
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self.stop_node(1)
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self.nodes[1]=start_node(1, self.options.tmpdir, ["-debug", "-maxreceivebuffer=20000", "-blockmaxsize=5000", "-blockmaxweight=20000", "-checkblocks=6", "-disablesafemode"], timewait=1200)
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height = self.nodes[1].getblockcount()
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print("Current block height:", height)
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invalidheight = height-1439
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badhash = self.nodes[1].getblockhash(invalidheight)
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print("Invalidating block at height:",invalidheight,badhash)
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self.nodes[1].invalidateblock(badhash)
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# We've now switched to our previously mined-24 block fork on node 1, but that's not what we want
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# So invalidate that fork as well, until we're on the same chain as node 0/2 (but at an ancestor 1440 blocks ago)
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mainchainhash = self.nodes[0].getblockhash(invalidheight - 1)
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curhash = self.nodes[1].getblockhash(invalidheight - 1)
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print('curhash != mainchainhash: ', curhash != mainchainhash)
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while curhash != mainchainhash:
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self.nodes[1].invalidateblock(curhash)
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curhash = self.nodes[1].getblockhash(invalidheight - 1)
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assert(self.nodes[1].getblockcount() == invalidheight - 1)
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print("New best height", self.nodes[1].getblockcount())
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# Reboot node1 to clear those giant tx's from mempool
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self.stop_node(1)
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self.nodes[1]=start_node(1, self.options.tmpdir, ["-debug","-maxreceivebuffer=20000", "-blockmaxsize=5000", "-blockmaxweight=20000", "-checkblocks=6", "-disablesafemode"], timewait=1200)
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print("Generating new longer chain of 1441 more blocks")
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self.nodes[1].generate(1441)
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print("Reconnect nodes")
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connect_nodes(self.nodes[0], 1)
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connect_nodes(self.nodes[2], 1)
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sync_blocks(self.nodes[0:3], timeout=300)
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print("Verify height on node 2:",self.nodes[2].getblockcount())
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print("Usage possibly still high bc of stale blocks in block files:", calc_usage(self.prunedir))
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print("Mine 992 more blocks so we have requisite history (some blocks will be big and cause pruning of previous chain)")
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# Get node0's wallet transactions back in its mempool, to avoid the
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# mined blocks from being too small.
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self.nodes[0].resendwallettransactions()
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mine_large_blocks(self.nodes[0], 992)
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sync_blocks(self.nodes[0:3], timeout=120)
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usage = calc_usage(self.prunedir)
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print("Usage should be below target:", usage)
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if (usage > 2200):
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raise AssertionError("Pruning target not being met")
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return invalidheight, badhash
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def reorg_back(self):
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# Verify that a block on the old main chain fork has been pruned away
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assert_raises_jsonrpc(-1, "Block not available (pruned data)", self.nodes[2].getblock, self.forkhash)
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print("Will need to redownload block",self.forkheight)
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# Verify that we have enough history to reorg back to the fork point
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# Although this is more than 1440 blocks, because this chain was written more recently
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# and only its other 1441 small and 992 large block are in the block files after it,
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# its expected to still be retained
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self.nodes[2].getblock(self.nodes[2].getblockhash(self.forkheight))
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first_reorg_height = self.nodes[2].getblockcount()
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curchainhash = self.nodes[2].getblockhash(self.mainchainheight)
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self.nodes[2].invalidateblock(curchainhash)
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goalbestheight = self.mainchainheight
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goalbesthash = self.mainchainhash2
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# As of 0.10 the current block download logic is not able to reorg to the original chain created in
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# create_chain_with_stale_blocks because it doesn't know of any peer that's on that chain from which to
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# redownload its missing blocks.
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# Invalidate the reorg_test chain in node 0 as well, it can successfully switch to the original chain
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# because it has all the block data.
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# However it must mine enough blocks to have a more work chain than the reorg_test chain in order
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# to trigger node 2's block download logic.
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# At this point node 2 is within 1440 blocks of the fork point so it will preserve its ability to reorg
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if self.nodes[2].getblockcount() < self.mainchainheight:
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blocks_to_mine = first_reorg_height + 1 - self.mainchainheight
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print("Rewind node 0 to prev main chain to mine longer chain to trigger redownload. Blocks needed:", blocks_to_mine)
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self.nodes[0].invalidateblock(curchainhash)
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assert(self.nodes[0].getblockcount() == self.mainchainheight)
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assert(self.nodes[0].getbestblockhash() == self.mainchainhash2)
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goalbesthash = self.nodes[0].generate(blocks_to_mine)[-1]
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goalbestheight = first_reorg_height + 1
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print("Verify node 2 reorged back to the main chain, some blocks of which it had to redownload")
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waitstart = time.time()
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while self.nodes[2].getblockcount() < goalbestheight:
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time.sleep(0.1)
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if time.time() - waitstart > 900:
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raise AssertionError("Node 2 didn't reorg to proper height")
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assert(self.nodes[2].getbestblockhash() == goalbesthash)
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# Verify we can now have the data for a block previously pruned
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assert(self.nodes[2].getblock(self.forkhash)["height"] == self.forkheight)
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def manual_test(self, node_number, use_timestamp):
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# at this point, node has 995 blocks and has not yet run in prune mode
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node = self.nodes[node_number] = start_node(node_number, self.options.tmpdir, ["-debug=0"], timewait=900)
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assert_equal(node.getblockcount(), 995)
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assert_raises_jsonrpc(-1, "not in prune mode", node.pruneblockchain, 500)
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self.stop_node(node_number)
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# now re-start in manual pruning mode
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node = self.nodes[node_number] = start_node(node_number, self.options.tmpdir, ["-debug=0","-prune=1"], timewait=900)
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assert_equal(node.getblockcount(), 995)
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def height(index):
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if use_timestamp:
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return node.getblockheader(node.getblockhash(index))["time"] + RESCAN_WINDOW
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else:
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return index
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def prune(index, expected_ret=None):
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ret = node.pruneblockchain(height(index))
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# Check the return value. When use_timestamp is True, just check
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# that the return value is less than or equal to the expected
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# value, because when more than one block is generated per second,
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# a timestamp will not be granular enough to uniquely identify an
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# individual block.
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if expected_ret is None:
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expected_ret = index
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if use_timestamp:
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assert_greater_than(ret, 0)
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assert_greater_than(expected_ret + 1, ret)
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else:
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assert_equal(ret, expected_ret)
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def has_block(index):
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return os.path.isfile(self.options.tmpdir + "/node{}/regtest/blocks/blk{:05}.dat".format(node_number, index))
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# should not prune because chain tip of node 3 (995) < PruneAfterHeight (1000)
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assert_raises_jsonrpc(-1, "Blockchain is too short for pruning", node.pruneblockchain, height(500))
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# mine 6 blocks so we are at height 1001 (i.e., above PruneAfterHeight)
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node.generate(6)
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assert_equal(node.getblockchaininfo()["blocks"], 1001)
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# negative heights should raise an exception
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assert_raises_jsonrpc(-8, "Negative", node.pruneblockchain, -10)
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# height=100 too low to prune first block file so this is a no-op
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prune(100)
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if not has_block(0):
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raise AssertionError("blk00000.dat is missing when should still be there")
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# Does nothing
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node.pruneblockchain(height(0))
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if not has_block(0):
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raise AssertionError("blk00000.dat is missing when should still be there")
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# height=141 should prune first file
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prune(141)
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if has_block(0):
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raise AssertionError("blk00000.dat is still there, should be pruned by now")
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if not has_block(1):
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raise AssertionError("blk00001.dat is missing when should still be there")
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# height=282 should prune second file
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prune(282)
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if has_block(1):
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raise AssertionError("blk00001.dat is still there, should be pruned by now")
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# height=1000 should not prune anything more, because tip-288 is in blk00002.dat.
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prune(1000)
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if has_block(2):
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raise AssertionError("blk00002.dat is still there, should be pruned by now")
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# advance the tip so blk00002.dat and blk00003.dat can be pruned (the last 288 blocks should now be in blk00004.dat)
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node.generate(288)
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prune(1000)
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for fnum in range(7):
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if has_block(fnum):
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raise AssertionError(f"blk0000{fnum}.dat is still there, should be pruned by now")
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if not has_block(7):
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raise AssertionError("blk00007.dat is missing when should still be there")
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# stop node, start back up with auto-prune at 2200MB, make sure still runs
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self.stop_node(node_number)
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self.nodes[node_number] = start_node(node_number, self.options.tmpdir, ["-debug=0","-prune=2200"], timewait=900)
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print("Success")
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def wallet_test(self):
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# check that the pruning node's wallet is still in good shape
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print("Stop and start pruning node to trigger wallet rescan")
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self.stop_node(2)
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start_node(2, self.options.tmpdir, ["-debug=1","-prune=2200"])
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print("Success")
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# check that wallet loads successfully when restarting a pruned node after IBD.
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# this was reported to fail in #7494.
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print ("Syncing node 5 to test wallet")
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connect_nodes(self.nodes[0], 5)
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nds = [self.nodes[0], self.nodes[5]]
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sync_blocks(nds, wait=5, timeout=300)
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self.stop_node(5) #stop and start to trigger rescan
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start_node(5, self.options.tmpdir, ["-debug=1","-prune=2200"])
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print ("Success")
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def run_test(self):
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print("Warning! This test requires 21GB of disk space and takes over 20 mins (up to 2 hours)")
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print("Mining a big blockchain of 2745 blocks")
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self.create_big_chain()
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# Chain diagram key:
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# * blocks on main chain
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# +,&,$,@ blocks on other forks
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# X invalidated block
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# N1 Node 1
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#
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# Start by mining a simple chain that nodes 0-2 have
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# N0=N1=N2 **...*(2745)
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# stop manual-pruning nodes with 995 blocks
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self.stop_node(3)
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self.stop_node(4)
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print("Check that we haven't started pruning yet because we're below PruneAfterHeight")
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self.test_height_min()
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# Extend this chain past the PruneAfterHeight
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# N0=N1=N2 **...*(2765)
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print("Check that we'll exceed disk space target if we have a very high stale block rate")
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self.create_chain_with_staleblocks()
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# Disconnect N0
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# And mine a 24 block chain on N1 and a separate 25 block chain on N0
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# N1=N2 **...*+...+(2789)
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# N0 **...**...**(2790)
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#
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# reconnect nodes causing reorg on N1 and N2
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# N1=N2 **...*(2765) *...**(2790)
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# \
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# +...+(2789)
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#
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# repeat this process until you have 12 stale forks hanging off the
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# main chain on N1 and N2
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# N0 *************************...***************************(3065)
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#
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# N1=N2 **...*(2765) *...**(2790) *.. ..**(3040) *...**(3065)
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# \ \ \
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# +...+(2789) &.. $...$(3064)
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|
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# Save some current chain state for later use
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self.mainchainheight = self.nodes[2].getblockcount() #3065
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self.mainchainhash2 = self.nodes[2].getblockhash(self.mainchainheight)
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|
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print("Check that we can survive a 1440 block reorg still")
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|
(self.forkheight,self.forkhash) = self.reorg_test() #(1626, )
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# Now create a 1440 block reorg by mining a longer chain on N1
|
|
# First disconnect N1
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# Then invalidate 1626 on main chain and 1625 on fork so height is 1625 on main chain
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|
# N1 **...*(2765) **...**(1625)X..
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|
# \
|
|
# ++...+(1624)X..
|
|
#
|
|
# Now mine 1441 more blocks on N1
|
|
# N1 **...*(2765) **...**(1625) @@...@(3066)
|
|
# \ \
|
|
# \ X...
|
|
# \ \
|
|
# ++...+(1624)X.. ..
|
|
#
|
|
# Reconnect nodes and mine 992 more blocks on N1
|
|
# N1 **...*(2765) **...**(1625) @@...@@@(4058)
|
|
# \ \
|
|
# \ X...
|
|
# \ \
|
|
# ++...+(1624)X.. ..
|
|
#
|
|
# N2 **...*(2765) **...**(1625) @@...@@@(4058)
|
|
# \ \
|
|
# \ *...**(3065)
|
|
# \ \
|
|
# ++...++(2789) ..
|
|
#
|
|
# N0 ********************(1625) @@...@@@(4058)
|
|
# \
|
|
# *...**(3065)
|
|
|
|
print("Test that we can rerequest a block we previously pruned if needed for a reorg")
|
|
self.reorg_back()
|
|
# Verify that N2 still has block 1626 on current chain (@), but not on main chain (*)
|
|
# Invalidate 1626 on current chain (@) on N2 and we should be able to reorg to
|
|
# original main chain (*), but will require redownload of some blocks
|
|
# In order to have a peer we think we can download from, must also perform this invalidation
|
|
# on N0 and mine a new longest chain to trigger.
|
|
# Final result:
|
|
# N0 ********************(1625) **...****(4059)
|
|
# \
|
|
# X@...@@@(4058)
|
|
#
|
|
# N2 **...*(2765) **...**(1625) **...****(4059)
|
|
# \ \
|
|
# \ X@...@@@(4058)
|
|
# \
|
|
# +..
|
|
#
|
|
# N1 doesn't change because 1626 on main chain (*) is invalid
|
|
|
|
print("Test manual pruning with block indices")
|
|
self.manual_test(3, use_timestamp=False)
|
|
|
|
print("Test manual pruning with timestamps")
|
|
self.manual_test(4, use_timestamp=True)
|
|
|
|
print("Test wallet re-scan")
|
|
self.wallet_test()
|
|
|
|
print("Done")
|
|
|
|
if __name__ == '__main__':
|
|
PruneTest().main()
|