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Diffstat (limited to 'qa/rpc-tests/pruning.py')
| -rwxr-xr-x | qa/rpc-tests/pruning.py | 356 |
1 files changed, 356 insertions, 0 deletions
diff --git a/qa/rpc-tests/pruning.py b/qa/rpc-tests/pruning.py new file mode 100755 index 0000000000..2824c51ce7 --- /dev/null +++ b/qa/rpc-tests/pruning.py @@ -0,0 +1,356 @@ +#!/usr/bin/env python2 +# Copyright (c) 2014 The Bitcoin Core developers +# Distributed under the MIT software license, see the accompanying +# file COPYING or http://www.opensource.org/licenses/mit-license.php. + +# +# Test pruning code +# ******** +# WARNING: +# This test uses 4GB of disk space. +# This test takes 30 mins or more (up to 2 hours) +# ******** + +from test_framework.test_framework import BitcoinTestFramework +from test_framework.util import * +import os.path + +def calc_usage(blockdir): + return sum(os.path.getsize(blockdir+f) for f in os.listdir(blockdir) if os.path.isfile(blockdir+f))/(1024*1024) + +class PruneTest(BitcoinTestFramework): + + def __init__(self): + self.utxo = [] + self.address = ["",""] + + # Some pre-processing to create a bunch of OP_RETURN txouts to insert into transactions we create + # So we have big transactions and full blocks to fill up our block files + + # create one script_pubkey + script_pubkey = "6a4d0200" #OP_RETURN OP_PUSH2 512 bytes + for i in xrange (512): + script_pubkey = script_pubkey + "01" + # concatenate 128 txouts of above script_pubkey which we'll insert before the txout for change + self.txouts = "81" + for k in xrange(128): + # add txout value + self.txouts = self.txouts + "0000000000000000" + # add length of script_pubkey + self.txouts = self.txouts + "fd0402" + # add script_pubkey + self.txouts = self.txouts + script_pubkey + + + def setup_chain(self): + print("Initializing test directory "+self.options.tmpdir) + initialize_chain_clean(self.options.tmpdir, 3) + + def setup_network(self): + self.nodes = [] + self.is_network_split = False + + # Create nodes 0 and 1 to mine + self.nodes.append(start_node(0, self.options.tmpdir, ["-debug","-maxreceivebuffer=20000","-blockmaxsize=999000", "-checkblocks=5"], timewait=900)) + self.nodes.append(start_node(1, self.options.tmpdir, ["-debug","-maxreceivebuffer=20000","-blockmaxsize=999000", "-checkblocks=5"], timewait=900)) + + # Create node 2 to test pruning + self.nodes.append(start_node(2, self.options.tmpdir, ["-debug","-maxreceivebuffer=20000","-prune=550"], timewait=900)) + self.prunedir = self.options.tmpdir+"/node2/regtest/blocks/" + + self.address[0] = self.nodes[0].getnewaddress() + self.address[1] = self.nodes[1].getnewaddress() + + connect_nodes(self.nodes[0], 1) + connect_nodes(self.nodes[1], 2) + connect_nodes(self.nodes[2], 0) + sync_blocks(self.nodes[0:3]) + + def create_big_chain(self): + # Start by creating some coinbases we can spend later + self.nodes[1].generate(200) + sync_blocks(self.nodes[0:2]) + self.nodes[0].generate(150) + # Then mine enough full blocks to create more than 550MB of data + for i in xrange(645): + self.mine_full_block(self.nodes[0], self.address[0]) + + sync_blocks(self.nodes[0:3]) + + def test_height_min(self): + if not os.path.isfile(self.prunedir+"blk00000.dat"): + raise AssertionError("blk00000.dat is missing, pruning too early") + print "Success" + print "Though we're already using more than 550MB, current usage:", calc_usage(self.prunedir) + print "Mining 25 more blocks should cause the first block file to be pruned" + # Pruning doesn't run until we're allocating another chunk, 20 full blocks past the height cutoff will ensure this + for i in xrange(25): + self.mine_full_block(self.nodes[0],self.address[0]) + + waitstart = time.time() + while os.path.isfile(self.prunedir+"blk00000.dat"): + time.sleep(0.1) + if time.time() - waitstart > 10: + raise AssertionError("blk00000.dat not pruned when it should be") + + print "Success" + usage = calc_usage(self.prunedir) + print "Usage should be below target:", usage + if (usage > 550): + raise AssertionError("Pruning target not being met") + + def create_chain_with_staleblocks(self): + # Create stale blocks in manageable sized chunks + print "Mine 24 (stale) blocks on Node 1, followed by 25 (main chain) block reorg from Node 0, for 12 rounds" + + for j in xrange(12): + # Disconnect node 0 so it can mine a longer reorg chain without knowing about node 1's soon-to-be-stale chain + # Node 2 stays connected, so it hears about the stale blocks and then reorg's when node0 reconnects + # Stopping node 0 also clears its mempool, so it doesn't have node1's transactions to accidentally mine + stop_node(self.nodes[0],0) + self.nodes[0]=start_node(0, self.options.tmpdir, ["-debug","-maxreceivebuffer=20000","-blockmaxsize=999000", "-checkblocks=5"], timewait=900) + # Mine 24 blocks in node 1 + self.utxo = self.nodes[1].listunspent() + for i in xrange(24): + if j == 0: + self.mine_full_block(self.nodes[1],self.address[1]) + else: + self.nodes[1].generate(1) #tx's already in mempool from previous disconnects + + # Reorg back with 25 block chain from node 0 + self.utxo = self.nodes[0].listunspent() + for i in xrange(25): + self.mine_full_block(self.nodes[0],self.address[0]) + + # Create connections in the order so both nodes can see the reorg at the same time + connect_nodes(self.nodes[1], 0) + connect_nodes(self.nodes[2], 0) + sync_blocks(self.nodes[0:3]) + + print "Usage can be over target because of high stale rate:", calc_usage(self.prunedir) + + def reorg_test(self): + # Node 1 will mine a 300 block chain starting 287 blocks back from Node 0 and Node 2's tip + # This will cause Node 2 to do a reorg requiring 288 blocks of undo data to the reorg_test chain + # Reboot node 1 to clear its mempool (hopefully make the invalidate faster) + # Lower the block max size so we don't keep mining all our big mempool transactions (from disconnected blocks) + stop_node(self.nodes[1],1) + self.nodes[1]=start_node(1, self.options.tmpdir, ["-debug","-maxreceivebuffer=20000","-blockmaxsize=5000", "-checkblocks=5", "-disablesafemode"], timewait=900) + + height = self.nodes[1].getblockcount() + print "Current block height:", height + + invalidheight = height-287 + badhash = self.nodes[1].getblockhash(invalidheight) + print "Invalidating block at height:",invalidheight,badhash + self.nodes[1].invalidateblock(badhash) + + # We've now switched to our previously mined-24 block fork on node 1, but thats not what we want + # So invalidate that fork as well, until we're on the same chain as node 0/2 (but at an ancestor 288 blocks ago) + mainchainhash = self.nodes[0].getblockhash(invalidheight - 1) + curhash = self.nodes[1].getblockhash(invalidheight - 1) + while curhash != mainchainhash: + self.nodes[1].invalidateblock(curhash) + curhash = self.nodes[1].getblockhash(invalidheight - 1) + + assert(self.nodes[1].getblockcount() == invalidheight - 1) + print "New best height", self.nodes[1].getblockcount() + + # Reboot node1 to clear those giant tx's from mempool + stop_node(self.nodes[1],1) + self.nodes[1]=start_node(1, self.options.tmpdir, ["-debug","-maxreceivebuffer=20000","-blockmaxsize=5000", "-checkblocks=5", "-disablesafemode"], timewait=900) + + print "Generating new longer chain of 300 more blocks" + self.nodes[1].generate(300) + + print "Reconnect nodes" + connect_nodes(self.nodes[0], 1) + connect_nodes(self.nodes[2], 1) + sync_blocks(self.nodes[0:3]) + + print "Verify height on node 2:",self.nodes[2].getblockcount() + print "Usage possibly still high bc of stale blocks in block files:", calc_usage(self.prunedir) + + print "Mine 220 more blocks so we have requisite history (some blocks will be big and cause pruning of previous chain)" + self.nodes[0].generate(220) #node 0 has many large tx's in its mempool from the disconnects + sync_blocks(self.nodes[0:3]) + + usage = calc_usage(self.prunedir) + print "Usage should be below target:", usage + if (usage > 550): + raise AssertionError("Pruning target not being met") + + return invalidheight,badhash + + def reorg_back(self): + # Verify that a block on the old main chain fork has been pruned away + try: + self.nodes[2].getblock(self.forkhash) + raise AssertionError("Old block wasn't pruned so can't test redownload") + except JSONRPCException as e: + print "Will need to redownload block",self.forkheight + + # Verify that we have enough history to reorg back to the fork point + # Although this is more than 288 blocks, because this chain was written more recently + # and only its other 299 small and 220 large block are in the block files after it, + # its expected to still be retained + self.nodes[2].getblock(self.nodes[2].getblockhash(self.forkheight)) + + first_reorg_height = self.nodes[2].getblockcount() + curchainhash = self.nodes[2].getblockhash(self.mainchainheight) + self.nodes[2].invalidateblock(curchainhash) + goalbestheight = self.mainchainheight + goalbesthash = self.mainchainhash2 + + # As of 0.10 the current block download logic is not able to reorg to the original chain created in + # create_chain_with_stale_blocks because it doesn't know of any peer thats on that chain from which to + # redownload its missing blocks. + # Invalidate the reorg_test chain in node 0 as well, it can successfully switch to the original chain + # because it has all the block data. + # However it must mine enough blocks to have a more work chain than the reorg_test chain in order + # to trigger node 2's block download logic. + # At this point node 2 is within 288 blocks of the fork point so it will preserve its ability to reorg + if self.nodes[2].getblockcount() < self.mainchainheight: + blocks_to_mine = first_reorg_height + 1 - self.mainchainheight + print "Rewind node 0 to prev main chain to mine longer chain to trigger redownload. Blocks needed:", blocks_to_mine + self.nodes[0].invalidateblock(curchainhash) + assert(self.nodes[0].getblockcount() == self.mainchainheight) + assert(self.nodes[0].getbestblockhash() == self.mainchainhash2) + goalbesthash = self.nodes[0].generate(blocks_to_mine)[-1] + goalbestheight = first_reorg_height + 1 + + print "Verify node 2 reorged back to the main chain, some blocks of which it had to redownload" + waitstart = time.time() + while self.nodes[2].getblockcount() < goalbestheight: + time.sleep(0.1) + if time.time() - waitstart > 900: + raise AssertionError("Node 2 didn't reorg to proper height") + assert(self.nodes[2].getbestblockhash() == goalbesthash) + # Verify we can now have the data for a block previously pruned + assert(self.nodes[2].getblock(self.forkhash)["height"] == self.forkheight) + + def mine_full_block(self, node, address): + # Want to create a full block + # We'll generate a 66k transaction below, and 14 of them is close to the 1MB block limit + for j in xrange(14): + if len(self.utxo) < 14: + self.utxo = node.listunspent() + inputs=[] + outputs = {} + t = self.utxo.pop() + inputs.append({ "txid" : t["txid"], "vout" : t["vout"]}) + remchange = t["amount"] - Decimal("0.001000") + outputs[address]=remchange + # Create a basic transaction that will send change back to ourself after account for a fee + # And then insert the 128 generated transaction outs in the middle rawtx[92] is where the # + # of txouts is stored and is the only thing we overwrite from the original transaction + rawtx = node.createrawtransaction(inputs, outputs) + newtx = rawtx[0:92] + newtx = newtx + self.txouts + newtx = newtx + rawtx[94:] + # Appears to be ever so slightly faster to sign with SIGHASH_NONE + signresult = node.signrawtransaction(newtx,None,None,"NONE") + txid = node.sendrawtransaction(signresult["hex"], True) + # Mine a full sized block which will be these transactions we just created + node.generate(1) + + + def run_test(self): + print "Warning! This test requires 4GB of disk space and takes over 30 mins (up to 2 hours)" + print "Mining a big blockchain of 995 blocks" + self.create_big_chain() + # Chain diagram key: + # * blocks on main chain + # +,&,$,@ blocks on other forks + # X invalidated block + # N1 Node 1 + # + # Start by mining a simple chain that all nodes have + # N0=N1=N2 **...*(995) + + print "Check that we haven't started pruning yet because we're below PruneAfterHeight" + self.test_height_min() + # Extend this chain past the PruneAfterHeight + # N0=N1=N2 **...*(1020) + + print "Check that we'll exceed disk space target if we have a very high stale block rate" + self.create_chain_with_staleblocks() + # Disconnect N0 + # And mine a 24 block chain on N1 and a separate 25 block chain on N0 + # N1=N2 **...*+...+(1044) + # N0 **...**...**(1045) + # + # reconnect nodes causing reorg on N1 and N2 + # N1=N2 **...*(1020) *...**(1045) + # \ + # +...+(1044) + # + # repeat this process until you have 12 stale forks hanging off the + # main chain on N1 and N2 + # N0 *************************...***************************(1320) + # + # N1=N2 **...*(1020) *...**(1045) *.. ..**(1295) *...**(1320) + # \ \ \ + # +...+(1044) &.. $...$(1319) + + # Save some current chain state for later use + self.mainchainheight = self.nodes[2].getblockcount() #1320 + self.mainchainhash2 = self.nodes[2].getblockhash(self.mainchainheight) + + print "Check that we can survive a 288 block reorg still" + (self.forkheight,self.forkhash) = self.reorg_test() #(1033, ) + # Now create a 288 block reorg by mining a longer chain on N1 + # First disconnect N1 + # Then invalidate 1033 on main chain and 1032 on fork so height is 1032 on main chain + # N1 **...*(1020) **...**(1032)X.. + # \ + # ++...+(1031)X.. + # + # Now mine 300 more blocks on N1 + # N1 **...*(1020) **...**(1032) @@...@(1332) + # \ \ + # \ X... + # \ \ + # ++...+(1031)X.. .. + # + # Reconnect nodes and mine 220 more blocks on N1 + # N1 **...*(1020) **...**(1032) @@...@@@(1552) + # \ \ + # \ X... + # \ \ + # ++...+(1031)X.. .. + # + # N2 **...*(1020) **...**(1032) @@...@@@(1552) + # \ \ + # \ *...**(1320) + # \ \ + # ++...++(1044) .. + # + # N0 ********************(1032) @@...@@@(1552) + # \ + # *...**(1320) + + 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 1033 on current chain (@), but not on main chain (*) + # Invalidate 1033 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 ********************(1032) **...****(1553) + # \ + # X@...@@@(1552) + # + # N2 **...*(1020) **...**(1032) **...****(1553) + # \ \ + # \ X@...@@@(1552) + # \ + # +.. + # + # N1 doesn't change because 1033 on main chain (*) is invalid + + print "Done" + +if __name__ == '__main__': + PruneTest().main() |