Track transaction packages in CTxMemPoolEntry
Associate with each CTxMemPoolEntry all the size/fees of descendant mempool transactions. Sort mempool by max(feerate of entry, feerate of descendants). Update statistics on-the-fly as transactions enter or leave the mempool. Also add ancestor and descendant limiting, so that transactions can be rejected if the number or size of unconfirmed ancestors exceeds a target, or if adding a transaction would cause some other mempool entry to have too many (or too large) a set of unconfirmed in- mempool descendants.
This commit is contained in:
Suhas Daftuar
Suhas Daftuar
parent
34628a1807
commit
5add7a74a6
10 changed files with 993 additions and 65 deletions
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@ -57,6 +57,7 @@ testScriptsExt=(
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'invalidblockrequest.py'
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# 'forknotify.py'
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'p2p-acceptblock.py'
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'mempool_packages.py'
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);
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#if [ "x$ENABLE_ZMQ" = "x1" ]; then
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107
qa/rpc-tests/mempool_packages.py
Executable file
107
qa/rpc-tests/mempool_packages.py
Executable file
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@ -0,0 +1,107 @@
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#!/usr/bin/env python2
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# Copyright (c) 2014-2015 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 descendant package tracking code
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import *
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def satoshi_round(amount):
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return Decimal(amount).quantize(Decimal('0.00000001'), rounding=ROUND_DOWN)
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class MempoolPackagesTest(BitcoinTestFramework):
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def setup_network(self):
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self.nodes = []
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self.nodes.append(start_node(0, self.options.tmpdir, ["-maxorphantx=1000", "-relaypriority=0"]))
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self.is_network_split = False
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self.sync_all()
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# Build a transaction that spends parent_txid:vout
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# Return amount sent
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def chain_transaction(self, parent_txid, vout, value, fee, num_outputs):
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send_value = satoshi_round((value - fee)/num_outputs)
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inputs = [ {'txid' : parent_txid, 'vout' : vout} ]
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outputs = {}
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for i in xrange(num_outputs):
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outputs[self.nodes[0].getnewaddress()] = send_value
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rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
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signedtx = self.nodes[0].signrawtransaction(rawtx)
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txid = self.nodes[0].sendrawtransaction(signedtx['hex'])
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fulltx = self.nodes[0].getrawtransaction(txid, 1)
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assert(len(fulltx['vout']) == num_outputs) # make sure we didn't generate a change output
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return (txid, send_value)
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def run_test(self):
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''' Mine some blocks and have them mature. '''
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self.nodes[0].generate(101)
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utxo = self.nodes[0].listunspent(10)
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txid = utxo[0]['txid']
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vout = utxo[0]['vout']
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value = utxo[0]['amount']
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fee = Decimal("0.0001")
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# 100 transactions off a confirmed tx should be fine
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chain = []
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for i in xrange(100):
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(txid, sent_value) = self.chain_transaction(txid, 0, value, fee, 1)
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value = sent_value
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chain.append(txid)
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# Check mempool has 100 transactions in it, and descendant
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# count and fees should look correct
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mempool = self.nodes[0].getrawmempool(True)
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assert_equal(len(mempool), 100)
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descendant_count = 1
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descendant_fees = 0
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descendant_size = 0
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SATOSHIS = 100000000
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for x in reversed(chain):
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assert_equal(mempool[x]['descendantcount'], descendant_count)
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descendant_fees += mempool[x]['fee']
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assert_equal(mempool[x]['descendantfees'], SATOSHIS*descendant_fees)
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descendant_size += mempool[x]['size']
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assert_equal(mempool[x]['descendantsize'], descendant_size)
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descendant_count += 1
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# Adding one more transaction on to the chain should fail.
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try:
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self.chain_transaction(txid, vout, value, fee, 1)
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except JSONRPCException as e:
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print "too-long-ancestor-chain successfully rejected"
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# TODO: test ancestor size limits
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# Now test descendant chain limits
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txid = utxo[1]['txid']
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value = utxo[1]['amount']
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vout = utxo[1]['vout']
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transaction_package = []
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# First create one parent tx with 10 children
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(txid, sent_value) = self.chain_transaction(txid, vout, value, fee, 10)
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parent_transaction = txid
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for i in xrange(10):
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transaction_package.append({'txid': txid, 'vout': i, 'amount': sent_value})
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for i in xrange(1000):
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utxo = transaction_package.pop(0)
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try:
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(txid, sent_value) = self.chain_transaction(utxo['txid'], utxo['vout'], utxo['amount'], fee, 10)
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for j in xrange(10):
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transaction_package.append({'txid': txid, 'vout': j, 'amount': sent_value})
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if i == 998:
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mempool = self.nodes[0].getrawmempool(True)
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assert_equal(mempool[parent_transaction]['descendantcount'], 1000)
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except JSONRPCException as e:
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print e.error['message']
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assert_equal(i, 999)
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print "tx that would create too large descendant package successfully rejected"
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# TODO: test descendant size limits
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if __name__ == '__main__':
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MempoolPackagesTest().main()
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@ -411,6 +411,10 @@ std::string HelpMessage(HelpMessageMode mode)
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strUsage += HelpMessageOpt("-fuzzmessagestest=<n>", "Randomly fuzz 1 of every <n> network messages");
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strUsage += HelpMessageOpt("-flushwallet", strprintf("Run a thread to flush wallet periodically (default: %u)", 1));
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strUsage += HelpMessageOpt("-stopafterblockimport", strprintf("Stop running after importing blocks from disk (default: %u)", 0));
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strUsage += HelpMessageOpt("-limitancestorcount=<n>", strprintf("Do not accept transactions if number of in-mempool ancestors is <n> or more (default: %u)", DEFAULT_ANCESTOR_LIMIT));
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strUsage += HelpMessageOpt("-limitancestorsize=<n>", strprintf("Do not accept transactions whose size with all in-mempool ancestors exceeds <n> kilobytes (default: %u)", DEFAULT_ANCESTOR_SIZE_LIMIT));
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strUsage += HelpMessageOpt("-limitdescendantcount=<n>", strprintf("Do not accept transactions if any ancestor would have <n> or more in-mempool descendants (default: %u)", DEFAULT_DESCENDANT_LIMIT));
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strUsage += HelpMessageOpt("-limitdescendantsize=<n>", strprintf("Do not accept transactions if any ancestor would have more than <n> kilobytes of in-mempool descendants (default: %u).", DEFAULT_DESCENDANT_SIZE_LIMIT));
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}
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string debugCategories = "addrman, alert, bench, coindb, db, lock, rand, rpc, selectcoins, mempool, mempoolrej, net, proxy, prune, http"; // Don't translate these and qt below
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if (mode == HMM_BITCOIN_QT)
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27
src/main.cpp
27
src/main.cpp
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@ -921,6 +921,17 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
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REJECT_HIGHFEE, "absurdly-high-fee",
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strprintf("%d > %d", nFees, ::minRelayTxFee.GetFee(nSize) * 10000));
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// Calculate in-mempool ancestors, up to a limit.
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CTxMemPool::setEntries setAncestors;
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size_t nLimitAncestors = GetArg("-limitancestorcount", DEFAULT_ANCESTOR_LIMIT);
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size_t nLimitAncestorSize = GetArg("-limitancestorsize", DEFAULT_ANCESTOR_SIZE_LIMIT)*1000;
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size_t nLimitDescendants = GetArg("-limitdescendantcount", DEFAULT_DESCENDANT_LIMIT);
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size_t nLimitDescendantSize = GetArg("-limitdescendantsize", DEFAULT_DESCENDANT_SIZE_LIMIT)*1000;
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std::string errString;
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if (!pool.CalculateMemPoolAncestors(entry, setAncestors, nLimitAncestors, nLimitAncestorSize, nLimitDescendants, nLimitDescendantSize, errString)) {
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return state.DoS(0, false, REJECT_NONSTANDARD, "too-long-mempool-chain", false, errString);
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}
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// Check against previous transactions
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// This is done last to help prevent CPU exhaustion denial-of-service attacks.
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if (!CheckInputs(tx, state, view, true, STANDARD_SCRIPT_VERIFY_FLAGS, true))
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@ -942,7 +953,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
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}
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// Store transaction in memory
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pool.addUnchecked(hash, entry, !IsInitialBlockDownload());
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pool.addUnchecked(hash, entry, setAncestors, !IsInitialBlockDownload());
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}
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SyncWithWallets(tx, NULL);
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@ -2033,13 +2044,23 @@ bool static DisconnectTip(CValidationState &state) {
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if (!FlushStateToDisk(state, FLUSH_STATE_IF_NEEDED))
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return false;
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// Resurrect mempool transactions from the disconnected block.
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std::vector<uint256> vHashUpdate;
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BOOST_FOREACH(const CTransaction &tx, block.vtx) {
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// ignore validation errors in resurrected transactions
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list<CTransaction> removed;
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CValidationState stateDummy;
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if (tx.IsCoinBase() || !AcceptToMemoryPool(mempool, stateDummy, tx, false, NULL))
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if (tx.IsCoinBase() || !AcceptToMemoryPool(mempool, stateDummy, tx, false, NULL)) {
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mempool.remove(tx, removed, true);
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} else if (mempool.exists(tx.GetHash())) {
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vHashUpdate.push_back(tx.GetHash());
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}
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}
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// AcceptToMemoryPool/addUnchecked all assume that new mempool entries have
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// no in-mempool children, which is generally not true when adding
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// previously-confirmed transactions back to the mempool.
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// UpdateTransactionsFromBlock finds descendants of any transactions in this
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// block that were added back and cleans up the mempool state.
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mempool.UpdateTransactionsFromBlock(vHashUpdate);
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mempool.removeCoinbaseSpends(pcoinsTip, pindexDelete->nHeight);
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mempool.check(pcoinsTip);
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// Update chainActive and related variables.
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@ -4258,7 +4279,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
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LogPrint("mempool", "AcceptToMemoryPool: peer=%d %s: accepted %s (poolsz %u)\n",
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pfrom->id, pfrom->cleanSubVer,
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tx.GetHash().ToString(),
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mempool.mapTx.size());
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mempool.size());
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// Recursively process any orphan transactions that depended on this one
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set<NodeId> setMisbehaving;
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@ -43,6 +43,14 @@ struct CNodeStateStats;
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static const bool DEFAULT_ALERTS = true;
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/** Default for -maxorphantx, maximum number of orphan transactions kept in memory */
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static const unsigned int DEFAULT_MAX_ORPHAN_TRANSACTIONS = 100;
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/** Default for -limitancestorcount, max number of in-mempool ancestors */
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static const unsigned int DEFAULT_ANCESTOR_LIMIT = 100;
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/** Default for -limitancestorsize, maximum kilobytes of tx + all in-mempool ancestors */
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static const unsigned int DEFAULT_ANCESTOR_SIZE_LIMIT = 900;
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/** Default for -limitdescendantcount, max number of in-mempool descendants */
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static const unsigned int DEFAULT_DESCENDANT_LIMIT = 1000;
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/** Default for -limitdescendantsize, maximum kilobytes of in-mempool descendants */
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static const unsigned int DEFAULT_DESCENDANT_SIZE_LIMIT = 2500;
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/** The maximum size of a blk?????.dat file (since 0.8) */
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static const unsigned int MAX_BLOCKFILE_SIZE = 0x8000000; // 128 MiB
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/** The pre-allocation chunk size for blk?????.dat files (since 0.8) */
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@ -74,18 +74,30 @@ static inline size_t DynamicUsage(const std::vector<X>& v)
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return MallocUsage(v.capacity() * sizeof(X));
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}
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template<typename X>
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static inline size_t DynamicUsage(const std::set<X>& s)
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template<typename X, typename Y>
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static inline size_t DynamicUsage(const std::set<X, Y>& s)
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{
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return MallocUsage(sizeof(stl_tree_node<X>)) * s.size();
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}
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template<typename X, typename Y>
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static inline size_t DynamicUsage(const std::map<X, Y>& m)
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static inline size_t IncrementalDynamicUsage(const std::set<X, Y>& s)
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{
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return MallocUsage(sizeof(stl_tree_node<X>));
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}
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template<typename X, typename Y, typename Z>
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static inline size_t DynamicUsage(const std::map<X, Y, Z>& m)
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{
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return MallocUsage(sizeof(stl_tree_node<std::pair<const X, Y> >)) * m.size();
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}
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template<typename X, typename Y, typename Z>
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static inline size_t IncrementalDynamicUsage(const std::map<X, Y, Z>& m)
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{
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return MallocUsage(sizeof(stl_tree_node<std::pair<const X, Y> >));
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}
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// Boost data structures
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template<typename X>
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@ -191,6 +191,9 @@ UniValue mempoolToJSON(bool fVerbose = false)
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info.push_back(Pair("height", (int)e.GetHeight()));
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info.push_back(Pair("startingpriority", e.GetPriority(e.GetHeight())));
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info.push_back(Pair("currentpriority", e.GetPriority(chainActive.Height())));
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info.push_back(Pair("descendantcount", e.GetCountWithDescendants()));
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info.push_back(Pair("descendantsize", e.GetSizeWithDescendants()));
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info.push_back(Pair("descendantfees", e.GetFeesWithDescendants()));
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const CTransaction& tx = e.GetTx();
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set<string> setDepends;
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BOOST_FOREACH(const CTxIn& txin, tx.vin)
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@ -245,6 +248,9 @@ UniValue getrawmempool(const UniValue& params, bool fHelp)
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" \"height\" : n, (numeric) block height when transaction entered pool\n"
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" \"startingpriority\" : n, (numeric) priority when transaction entered pool\n"
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" \"currentpriority\" : n, (numeric) transaction priority now\n"
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" \"descendantcount\" : n, (numeric) number of in-mempool descendant transactions (including this one)\n"
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" \"descendantsize\" : n, (numeric) size of in-mempool descendants (including this one)\n"
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" \"descendantfees\" : n, (numeric) fees of in-mempool descendants (including this one)\n"
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" \"depends\" : [ (array) unconfirmed transactions used as inputs for this transaction\n"
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" \"transactionid\", (string) parent transaction id\n"
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" ... ]\n"
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@ -9,6 +9,7 @@
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#include <boost/test/unit_test.hpp>
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#include <list>
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#include <vector>
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BOOST_FIXTURE_TEST_SUITE(mempool_tests, TestingSetup)
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@ -100,6 +101,16 @@ BOOST_AUTO_TEST_CASE(MempoolRemoveTest)
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removed.clear();
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}
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void CheckSort(CTxMemPool &pool, std::vector<std::string> &sortedOrder)
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{
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BOOST_CHECK_EQUAL(pool.size(), sortedOrder.size());
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CTxMemPool::indexed_transaction_set::nth_index<1>::type::iterator it = pool.mapTx.get<1>().begin();
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int count=0;
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for (; it != pool.mapTx.get<1>().end(); ++it, ++count) {
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BOOST_CHECK_EQUAL(it->GetTx().GetHash().ToString(), sortedOrder[count]);
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}
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}
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BOOST_AUTO_TEST_CASE(MempoolIndexingTest)
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{
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CTxMemPool pool(CFeeRate(0));
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@ -138,18 +149,136 @@ BOOST_AUTO_TEST_CASE(MempoolIndexingTest)
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tx5.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
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tx5.vout[0].nValue = 11 * COIN;
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pool.addUnchecked(tx5.GetHash(), CTxMemPoolEntry(tx5, 10000LL, 1, 10.0, 1, true));
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// there should be 4 transactions in the mempool
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BOOST_CHECK_EQUAL(pool.size(), 5);
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// Check the fee-rate index is in order, should be tx2, tx4, tx1, tx5, tx3
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CTxMemPool::indexed_transaction_set::nth_index<1>::type::iterator it = pool.mapTx.get<1>().begin();
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BOOST_CHECK_EQUAL(it++->GetTx().GetHash().ToString(), tx2.GetHash().ToString());
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BOOST_CHECK_EQUAL(it++->GetTx().GetHash().ToString(), tx4.GetHash().ToString());
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BOOST_CHECK_EQUAL(it++->GetTx().GetHash().ToString(), tx1.GetHash().ToString());
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BOOST_CHECK_EQUAL(it++->GetTx().GetHash().ToString(), tx5.GetHash().ToString());
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BOOST_CHECK_EQUAL(it++->GetTx().GetHash().ToString(), tx3.GetHash().ToString());
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BOOST_CHECK(it == pool.mapTx.get<1>().end());
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std::vector<std::string> sortedOrder;
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sortedOrder.resize(5);
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sortedOrder[0] = tx2.GetHash().ToString(); // 20000
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sortedOrder[1] = tx4.GetHash().ToString(); // 15000
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sortedOrder[2] = tx1.GetHash().ToString(); // 10000
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sortedOrder[3] = tx5.GetHash().ToString(); // 10000
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sortedOrder[4] = tx3.GetHash().ToString(); // 0
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CheckSort(pool, sortedOrder);
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/* low fee but with high fee child */
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/* tx6 -> tx7 -> tx8, tx9 -> tx10 */
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CMutableTransaction tx6 = CMutableTransaction();
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tx6.vout.resize(1);
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tx6.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
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tx6.vout[0].nValue = 20 * COIN;
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pool.addUnchecked(tx6.GetHash(), CTxMemPoolEntry(tx6, 0LL, 1, 10.0, 1, true));
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BOOST_CHECK_EQUAL(pool.size(), 6);
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// Check that at this point, tx6 is sorted low
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sortedOrder.push_back(tx6.GetHash().ToString());
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CheckSort(pool, sortedOrder);
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CTxMemPool::setEntries setAncestors;
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setAncestors.insert(pool.mapTx.find(tx6.GetHash()));
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CMutableTransaction tx7 = CMutableTransaction();
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tx7.vin.resize(1);
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tx7.vin[0].prevout = COutPoint(tx6.GetHash(), 0);
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tx7.vin[0].scriptSig = CScript() << OP_11;
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tx7.vout.resize(2);
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tx7.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
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tx7.vout[0].nValue = 10 * COIN;
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tx7.vout[1].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
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tx7.vout[1].nValue = 1 * COIN;
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CTxMemPool::setEntries setAncestorsCalculated;
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std::string dummy;
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CTxMemPoolEntry entry7(tx7, 2000000LL, 1, 10.0, 1, true);
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BOOST_CHECK_EQUAL(pool.CalculateMemPoolAncestors(entry7, setAncestorsCalculated, 100, 1000000, 1000, 1000000, dummy), true);
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BOOST_CHECK(setAncestorsCalculated == setAncestors);
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pool.addUnchecked(tx7.GetHash(), CTxMemPoolEntry(tx7, 2000000LL, 1, 10.0, 1, true), setAncestors);
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BOOST_CHECK_EQUAL(pool.size(), 7);
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// Now tx6 should be sorted higher (high fee child): tx7, tx6, tx2, ...
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sortedOrder.erase(sortedOrder.end()-1);
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sortedOrder.insert(sortedOrder.begin(), tx6.GetHash().ToString());
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sortedOrder.insert(sortedOrder.begin(), tx7.GetHash().ToString());
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CheckSort(pool, sortedOrder);
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/* low fee child of tx7 */
|
||||
CMutableTransaction tx8 = CMutableTransaction();
|
||||
tx8.vin.resize(1);
|
||||
tx8.vin[0].prevout = COutPoint(tx7.GetHash(), 0);
|
||||
tx8.vin[0].scriptSig = CScript() << OP_11;
|
||||
tx8.vout.resize(1);
|
||||
tx8.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
|
||||
tx8.vout[0].nValue = 10 * COIN;
|
||||
setAncestors.insert(pool.mapTx.find(tx7.GetHash()));
|
||||
pool.addUnchecked(tx8.GetHash(), CTxMemPoolEntry(tx8, 0LL, 2, 10.0, 1, true), setAncestors);
|
||||
|
||||
// Now tx8 should be sorted low, but tx6/tx both high
|
||||
sortedOrder.push_back(tx8.GetHash().ToString());
|
||||
CheckSort(pool, sortedOrder);
|
||||
|
||||
/* low fee child of tx7 */
|
||||
CMutableTransaction tx9 = CMutableTransaction();
|
||||
tx9.vin.resize(1);
|
||||
tx9.vin[0].prevout = COutPoint(tx7.GetHash(), 1);
|
||||
tx9.vin[0].scriptSig = CScript() << OP_11;
|
||||
tx9.vout.resize(1);
|
||||
tx9.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
|
||||
tx9.vout[0].nValue = 1 * COIN;
|
||||
pool.addUnchecked(tx9.GetHash(), CTxMemPoolEntry(tx9, 0LL, 3, 10.0, 1, true), setAncestors);
|
||||
|
||||
// tx9 should be sorted low
|
||||
BOOST_CHECK_EQUAL(pool.size(), 9);
|
||||
sortedOrder.push_back(tx9.GetHash().ToString());
|
||||
CheckSort(pool, sortedOrder);
|
||||
|
||||
std::vector<std::string> snapshotOrder = sortedOrder;
|
||||
|
||||
setAncestors.insert(pool.mapTx.find(tx8.GetHash()));
|
||||
setAncestors.insert(pool.mapTx.find(tx9.GetHash()));
|
||||
/* tx10 depends on tx8 and tx9 and has a high fee*/
|
||||
CMutableTransaction tx10 = CMutableTransaction();
|
||||
tx10.vin.resize(2);
|
||||
tx10.vin[0].prevout = COutPoint(tx8.GetHash(), 0);
|
||||
tx10.vin[0].scriptSig = CScript() << OP_11;
|
||||
tx10.vin[1].prevout = COutPoint(tx9.GetHash(), 0);
|
||||
tx10.vin[1].scriptSig = CScript() << OP_11;
|
||||
tx10.vout.resize(1);
|
||||
tx10.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
|
||||
tx10.vout[0].nValue = 10 * COIN;
|
||||
|
||||
setAncestorsCalculated.clear();
|
||||
CTxMemPoolEntry entry10(tx10, 200000LL, 4, 10.0, 1, true);
|
||||
BOOST_CHECK_EQUAL(pool.CalculateMemPoolAncestors(entry10, setAncestorsCalculated, 100, 1000000, 1000, 1000000, dummy), true);
|
||||
BOOST_CHECK(setAncestorsCalculated == setAncestors);
|
||||
|
||||
pool.addUnchecked(tx10.GetHash(), CTxMemPoolEntry(tx10, 200000LL, 4, 10.0, 1, true), setAncestors);
|
||||
|
||||
/**
|
||||
* tx8 and tx9 should both now be sorted higher
|
||||
* Final order after tx10 is added:
|
||||
*
|
||||
* tx7 = 2.2M (4 txs)
|
||||
* tx6 = 2.2M (5 txs)
|
||||
* tx10 = 200k (1 tx)
|
||||
* tx8 = 200k (2 txs)
|
||||
* tx9 = 200k (2 txs)
|
||||
* tx2 = 20000 (1)
|
||||
* tx4 = 15000 (1)
|
||||
* tx1 = 10000 (1)
|
||||
* tx5 = 10000 (1)
|
||||
* tx3 = 0 (1)
|
||||
*/
|
||||
sortedOrder.erase(sortedOrder.end()-2, sortedOrder.end()); // take out tx8, tx9 from the end
|
||||
sortedOrder.insert(sortedOrder.begin()+2, tx10.GetHash().ToString()); // tx10 is after tx6
|
||||
sortedOrder.insert(sortedOrder.begin()+3, tx9.GetHash().ToString());
|
||||
sortedOrder.insert(sortedOrder.begin()+3, tx8.GetHash().ToString());
|
||||
CheckSort(pool, sortedOrder);
|
||||
|
||||
// there should be 10 transactions in the mempool
|
||||
BOOST_CHECK_EQUAL(pool.size(), 10);
|
||||
|
||||
// Now try removing tx10 and verify the sort order returns to normal
|
||||
std::list<CTransaction> removed;
|
||||
pool.remove(pool.mapTx.find(tx10.GetHash())->GetTx(), removed, true);
|
||||
CheckSort(pool, snapshotOrder);
|
||||
}
|
||||
|
||||
BOOST_AUTO_TEST_SUITE_END()
|
||||
|
|
|
|||
|
|
@ -17,12 +17,6 @@
|
|||
|
||||
using namespace std;
|
||||
|
||||
CTxMemPoolEntry::CTxMemPoolEntry():
|
||||
nFee(0), nTxSize(0), nModSize(0), nUsageSize(0), nTime(0), dPriority(0.0), hadNoDependencies(false)
|
||||
{
|
||||
nHeight = MEMPOOL_HEIGHT;
|
||||
}
|
||||
|
||||
CTxMemPoolEntry::CTxMemPoolEntry(const CTransaction& _tx, const CAmount& _nFee,
|
||||
int64_t _nTime, double _dPriority,
|
||||
unsigned int _nHeight, bool poolHasNoInputsOf):
|
||||
|
|
@ -32,7 +26,10 @@ CTxMemPoolEntry::CTxMemPoolEntry(const CTransaction& _tx, const CAmount& _nFee,
|
|||
nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
|
||||
nModSize = tx.CalculateModifiedSize(nTxSize);
|
||||
nUsageSize = RecursiveDynamicUsage(tx);
|
||||
feeRate = CFeeRate(nFee, nTxSize);
|
||||
|
||||
nCountWithDescendants = 1;
|
||||
nSizeWithDescendants = nTxSize;
|
||||
nFeesWithDescendants = nFee;
|
||||
}
|
||||
|
||||
CTxMemPoolEntry::CTxMemPoolEntry(const CTxMemPoolEntry& other)
|
||||
|
|
@ -49,6 +46,244 @@ CTxMemPoolEntry::GetPriority(unsigned int currentHeight) const
|
|||
return dResult;
|
||||
}
|
||||
|
||||
// Update the given tx for any in-mempool descendants.
|
||||
// Assumes that setMemPoolChildren is correct for the given tx and all
|
||||
// descendants.
|
||||
bool CTxMemPool::UpdateForDescendants(txiter updateIt, int maxDescendantsToVisit, cacheMap &cachedDescendants, const std::set<uint256> &setExclude)
|
||||
{
|
||||
// Track the number of entries (outside setExclude) that we'd need to visit
|
||||
// (will bail out if it exceeds maxDescendantsToVisit)
|
||||
int nChildrenToVisit = 0;
|
||||
|
||||
setEntries stageEntries, setAllDescendants;
|
||||
stageEntries = GetMemPoolChildren(updateIt);
|
||||
|
||||
while (!stageEntries.empty()) {
|
||||
const txiter cit = *stageEntries.begin();
|
||||
if (cit->IsDirty()) {
|
||||
// Don't consider any more children if any descendant is dirty
|
||||
return false;
|
||||
}
|
||||
setAllDescendants.insert(cit);
|
||||
stageEntries.erase(cit);
|
||||
const setEntries &setChildren = GetMemPoolChildren(cit);
|
||||
BOOST_FOREACH(const txiter childEntry, setChildren) {
|
||||
cacheMap::iterator cacheIt = cachedDescendants.find(childEntry);
|
||||
if (cacheIt != cachedDescendants.end()) {
|
||||
// We've already calculated this one, just add the entries for this set
|
||||
// but don't traverse again.
|
||||
BOOST_FOREACH(const txiter cacheEntry, cacheIt->second) {
|
||||
// update visit count only for new child transactions
|
||||
// (outside of setExclude and stageEntries)
|
||||
if (setAllDescendants.insert(cacheEntry).second &&
|
||||
!setExclude.count(cacheEntry->GetTx().GetHash()) &&
|
||||
!stageEntries.count(cacheEntry)) {
|
||||
nChildrenToVisit++;
|
||||
}
|
||||
}
|
||||
} else if (!setAllDescendants.count(childEntry)) {
|
||||
// Schedule for later processing and update our visit count
|
||||
if (stageEntries.insert(childEntry).second && !setExclude.count(childEntry->GetTx().GetHash())) {
|
||||
nChildrenToVisit++;
|
||||
}
|
||||
}
|
||||
if (nChildrenToVisit > maxDescendantsToVisit) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
// setAllDescendants now contains all in-mempool descendants of updateIt.
|
||||
// Update and add to cached descendant map
|
||||
int64_t modifySize = 0;
|
||||
CAmount modifyFee = 0;
|
||||
int64_t modifyCount = 0;
|
||||
BOOST_FOREACH(txiter cit, setAllDescendants) {
|
||||
if (!setExclude.count(cit->GetTx().GetHash())) {
|
||||
modifySize += cit->GetTxSize();
|
||||
modifyFee += cit->GetFee();
|
||||
modifyCount++;
|
||||
cachedDescendants[updateIt].insert(cit);
|
||||
}
|
||||
}
|
||||
mapTx.modify(updateIt, update_descendant_state(modifySize, modifyFee, modifyCount));
|
||||
return true;
|
||||
}
|
||||
|
||||
// vHashesToUpdate is the set of transaction hashes from a disconnected block
|
||||
// which has been re-added to the mempool.
|
||||
// for each entry, look for descendants that are outside hashesToUpdate, and
|
||||
// add fee/size information for such descendants to the parent.
|
||||
void CTxMemPool::UpdateTransactionsFromBlock(const std::vector<uint256> &vHashesToUpdate)
|
||||
{
|
||||
LOCK(cs);
|
||||
// For each entry in vHashesToUpdate, store the set of in-mempool, but not
|
||||
// in-vHashesToUpdate transactions, so that we don't have to recalculate
|
||||
// descendants when we come across a previously seen entry.
|
||||
cacheMap mapMemPoolDescendantsToUpdate;
|
||||
|
||||
// Use a set for lookups into vHashesToUpdate (these entries are already
|
||||
// accounted for in the state of their ancestors)
|
||||
std::set<uint256> setAlreadyIncluded(vHashesToUpdate.begin(), vHashesToUpdate.end());
|
||||
|
||||
// Iterate in reverse, so that whenever we are looking at at a transaction
|
||||
// we are sure that all in-mempool descendants have already been processed.
|
||||
// This maximizes the benefit of the descendant cache and guarantees that
|
||||
// setMemPoolChildren will be updated, an assumption made in
|
||||
// UpdateForDescendants.
|
||||
BOOST_REVERSE_FOREACH(const uint256 &hash, vHashesToUpdate) {
|
||||
// we cache the in-mempool children to avoid duplicate updates
|
||||
setEntries setChildren;
|
||||
// calculate children from mapNextTx
|
||||
txiter it = mapTx.find(hash);
|
||||
if (it == mapTx.end()) {
|
||||
continue;
|
||||
}
|
||||
std::map<COutPoint, CInPoint>::iterator iter = mapNextTx.lower_bound(COutPoint(hash, 0));
|
||||
// First calculate the children, and update setMemPoolChildren to
|
||||
// include them, and update their setMemPoolParents to include this tx.
|
||||
for (; iter != mapNextTx.end() && iter->first.hash == hash; ++iter) {
|
||||
const uint256 &childHash = iter->second.ptx->GetHash();
|
||||
txiter childIter = mapTx.find(childHash);
|
||||
assert(childIter != mapTx.end());
|
||||
// We can skip updating entries we've encountered before or that
|
||||
// are in the block (which are already accounted for).
|
||||
if (setChildren.insert(childIter).second && !setAlreadyIncluded.count(childHash)) {
|
||||
UpdateChild(it, childIter, true);
|
||||
UpdateParent(childIter, it, true);
|
||||
}
|
||||
}
|
||||
if (!UpdateForDescendants(it, 100, mapMemPoolDescendantsToUpdate, setAlreadyIncluded)) {
|
||||
// Mark as dirty if we can't do the calculation.
|
||||
mapTx.modify(it, set_dirty());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
bool CTxMemPool::CalculateMemPoolAncestors(const CTxMemPoolEntry &entry, setEntries &setAncestors, uint64_t limitAncestorCount, uint64_t limitAncestorSize, uint64_t limitDescendantCount, uint64_t limitDescendantSize, std::string &errString)
|
||||
{
|
||||
setEntries parentHashes;
|
||||
const CTransaction &tx = entry.GetTx();
|
||||
|
||||
// Get parents of this transaction that are in the mempool
|
||||
// Entry may or may not already be in the mempool, and GetMemPoolParents()
|
||||
// is only valid for entries in the mempool, so we iterate mapTx to find
|
||||
// parents.
|
||||
// TODO: optimize this so that we only check limits and walk
|
||||
// tx.vin when called on entries not already in the mempool.
|
||||
for (unsigned int i = 0; i < tx.vin.size(); i++) {
|
||||
txiter piter = mapTx.find(tx.vin[i].prevout.hash);
|
||||
if (piter != mapTx.end()) {
|
||||
parentHashes.insert(piter);
|
||||
if (parentHashes.size() + 1 > limitAncestorCount) {
|
||||
errString = strprintf("too many unconfirmed parents [limit: %u]", limitAncestorCount);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
size_t totalSizeWithAncestors = entry.GetTxSize();
|
||||
|
||||
while (!parentHashes.empty()) {
|
||||
txiter stageit = *parentHashes.begin();
|
||||
|
||||
setAncestors.insert(stageit);
|
||||
parentHashes.erase(stageit);
|
||||
totalSizeWithAncestors += stageit->GetTxSize();
|
||||
|
||||
if (stageit->GetSizeWithDescendants() + entry.GetTxSize() > limitDescendantSize) {
|
||||
errString = strprintf("exceeds descendant size limit for tx %s [limit: %u]", stageit->GetTx().GetHash().ToString(), limitDescendantSize);
|
||||
return false;
|
||||
} else if (stageit->GetCountWithDescendants() + 1 > limitDescendantCount) {
|
||||
errString = strprintf("too many descendants for tx %s [limit: %u]", stageit->GetTx().GetHash().ToString(), limitDescendantCount);
|
||||
return false;
|
||||
} else if (totalSizeWithAncestors > limitAncestorSize) {
|
||||
errString = strprintf("exceeds ancestor size limit [limit: %u]", limitAncestorSize);
|
||||
return false;
|
||||
}
|
||||
|
||||
const setEntries & setMemPoolParents = GetMemPoolParents(stageit);
|
||||
BOOST_FOREACH(const txiter &phash, setMemPoolParents) {
|
||||
// If this is a new ancestor, add it.
|
||||
if (setAncestors.count(phash) == 0) {
|
||||
parentHashes.insert(phash);
|
||||
}
|
||||
if (parentHashes.size() + setAncestors.size() + 1 > limitAncestorCount) {
|
||||
errString = strprintf("too many unconfirmed ancestors [limit: %u]", limitAncestorCount);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void CTxMemPool::UpdateAncestorsOf(bool add, txiter it, setEntries &setAncestors)
|
||||
{
|
||||
setEntries parentIters = GetMemPoolParents(it);
|
||||
// add or remove this tx as a child of each parent
|
||||
BOOST_FOREACH(txiter piter, parentIters) {
|
||||
UpdateChild(piter, it, add);
|
||||
}
|
||||
const int64_t updateCount = (add ? 1 : -1);
|
||||
const int64_t updateSize = updateCount * it->GetTxSize();
|
||||
const CAmount updateFee = updateCount * it->GetFee();
|
||||
BOOST_FOREACH(txiter ancestorIt, setAncestors) {
|
||||
mapTx.modify(ancestorIt, update_descendant_state(updateSize, updateFee, updateCount));
|
||||
}
|
||||
}
|
||||
|
||||
void CTxMemPool::UpdateChildrenForRemoval(txiter it)
|
||||
{
|
||||
const setEntries &setMemPoolChildren = GetMemPoolChildren(it);
|
||||
BOOST_FOREACH(txiter updateIt, setMemPoolChildren) {
|
||||
UpdateParent(updateIt, it, false);
|
||||
}
|
||||
}
|
||||
|
||||
void CTxMemPool::UpdateForRemoveFromMempool(const setEntries &entriesToRemove)
|
||||
{
|
||||
// For each entry, walk back all ancestors and decrement size associated with this
|
||||
// transaction
|
||||
const uint64_t nNoLimit = std::numeric_limits<uint64_t>::max();
|
||||
BOOST_FOREACH(txiter removeIt, entriesToRemove) {
|
||||
setEntries setAncestors;
|
||||
const CTxMemPoolEntry &entry = *removeIt;
|
||||
std::string dummy;
|
||||
CalculateMemPoolAncestors(entry, setAncestors, nNoLimit, nNoLimit, nNoLimit, nNoLimit, dummy);
|
||||
// Note that UpdateAncestorsOf severs the child links that point to
|
||||
// removeIt in the entries for the parents of removeIt. This is
|
||||
// fine since we don't need to use the mempool children of any entries
|
||||
// to walk back over our ancestors (but we do need the mempool
|
||||
// parents!)
|
||||
UpdateAncestorsOf(false, removeIt, setAncestors);
|
||||
}
|
||||
// After updating all the ancestor sizes, we can now sever the link between each
|
||||
// transaction being removed and any mempool children (ie, update setMemPoolParents
|
||||
// for each direct child of a transaction being removed).
|
||||
BOOST_FOREACH(txiter removeIt, entriesToRemove) {
|
||||
UpdateChildrenForRemoval(removeIt);
|
||||
}
|
||||
}
|
||||
|
||||
void CTxMemPoolEntry::SetDirty()
|
||||
{
|
||||
nCountWithDescendants = 0;
|
||||
nSizeWithDescendants = nTxSize;
|
||||
nFeesWithDescendants = nFee;
|
||||
}
|
||||
|
||||
void CTxMemPoolEntry::UpdateState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount)
|
||||
{
|
||||
if (!IsDirty()) {
|
||||
nSizeWithDescendants += modifySize;
|
||||
assert(int64_t(nSizeWithDescendants) > 0);
|
||||
nFeesWithDescendants += modifyFee;
|
||||
assert(nFeesWithDescendants >= 0);
|
||||
nCountWithDescendants += modifyCount;
|
||||
assert(int64_t(nCountWithDescendants) > 0);
|
||||
}
|
||||
}
|
||||
|
||||
CTxMemPool::CTxMemPool(const CFeeRate& _minRelayFee) :
|
||||
nTransactionsUpdated(0)
|
||||
{
|
||||
|
|
@ -90,34 +325,103 @@ void CTxMemPool::AddTransactionsUpdated(unsigned int n)
|
|||
nTransactionsUpdated += n;
|
||||
}
|
||||
|
||||
|
||||
bool CTxMemPool::addUnchecked(const uint256& hash, const CTxMemPoolEntry &entry, bool fCurrentEstimate)
|
||||
bool CTxMemPool::addUnchecked(const uint256& hash, const CTxMemPoolEntry &entry, setEntries &setAncestors, bool fCurrentEstimate)
|
||||
{
|
||||
// Add to memory pool without checking anything.
|
||||
// Used by main.cpp AcceptToMemoryPool(), which DOES do
|
||||
// all the appropriate checks.
|
||||
LOCK(cs);
|
||||
mapTx.insert(entry);
|
||||
const CTransaction& tx = mapTx.find(hash)->GetTx();
|
||||
for (unsigned int i = 0; i < tx.vin.size(); i++)
|
||||
indexed_transaction_set::iterator newit = mapTx.insert(entry).first;
|
||||
mapLinks.insert(make_pair(newit, TxLinks()));
|
||||
|
||||
// Update cachedInnerUsage to include contained transaction's usage.
|
||||
// (When we update the entry for in-mempool parents, memory usage will be
|
||||
// further updated.)
|
||||
cachedInnerUsage += entry.DynamicMemoryUsage();
|
||||
|
||||
const CTransaction& tx = newit->GetTx();
|
||||
std::set<uint256> setParentTransactions;
|
||||
for (unsigned int i = 0; i < tx.vin.size(); i++) {
|
||||
mapNextTx[tx.vin[i].prevout] = CInPoint(&tx, i);
|
||||
setParentTransactions.insert(tx.vin[i].prevout.hash);
|
||||
}
|
||||
// Don't bother worrying about child transactions of this one.
|
||||
// Normal case of a new transaction arriving is that there can't be any
|
||||
// children, because such children would be orphans.
|
||||
// An exception to that is if a transaction enters that used to be in a block.
|
||||
// In that case, our disconnect block logic will call UpdateTransactionsFromBlock
|
||||
// to clean up the mess we're leaving here.
|
||||
|
||||
// Update ancestors with information about this tx
|
||||
BOOST_FOREACH (const uint256 &phash, setParentTransactions) {
|
||||
txiter pit = mapTx.find(phash);
|
||||
if (pit != mapTx.end()) {
|
||||
UpdateParent(newit, pit, true);
|
||||
}
|
||||
}
|
||||
UpdateAncestorsOf(true, newit, setAncestors);
|
||||
|
||||
nTransactionsUpdated++;
|
||||
totalTxSize += entry.GetTxSize();
|
||||
cachedInnerUsage += entry.DynamicMemoryUsage();
|
||||
minerPolicyEstimator->processTransaction(entry, fCurrentEstimate);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void CTxMemPool::removeUnchecked(txiter it)
|
||||
{
|
||||
const uint256 hash = it->GetTx().GetHash();
|
||||
BOOST_FOREACH(const CTxIn& txin, it->GetTx().vin)
|
||||
mapNextTx.erase(txin.prevout);
|
||||
|
||||
totalTxSize -= it->GetTxSize();
|
||||
cachedInnerUsage -= it->DynamicMemoryUsage();
|
||||
cachedInnerUsage -= memusage::DynamicUsage(mapLinks[it].parents) + memusage::DynamicUsage(mapLinks[it].children);
|
||||
mapLinks.erase(it);
|
||||
mapTx.erase(it);
|
||||
nTransactionsUpdated++;
|
||||
minerPolicyEstimator->removeTx(hash);
|
||||
}
|
||||
|
||||
// Calculates descendants of entry that are not already in setDescendants, and adds to
|
||||
// setDescendants. Assumes entryit is already a tx in the mempool and setMemPoolChildren
|
||||
// is correct for tx and all descendants.
|
||||
// Also assumes that if an entry is in setDescendants already, then all
|
||||
// in-mempool descendants of it are already in setDescendants as well, so that we
|
||||
// can save time by not iterating over those entries.
|
||||
void CTxMemPool::CalculateDescendants(txiter entryit, setEntries &setDescendants)
|
||||
{
|
||||
setEntries stage;
|
||||
if (setDescendants.count(entryit) == 0) {
|
||||
stage.insert(entryit);
|
||||
}
|
||||
// Traverse down the children of entry, only adding children that are not
|
||||
// accounted for in setDescendants already (because those children have either
|
||||
// already been walked, or will be walked in this iteration).
|
||||
while (!stage.empty()) {
|
||||
txiter it = *stage.begin();
|
||||
setDescendants.insert(it);
|
||||
stage.erase(it);
|
||||
|
||||
const setEntries &setChildren = GetMemPoolChildren(it);
|
||||
BOOST_FOREACH(const txiter &childiter, setChildren) {
|
||||
if (!setDescendants.count(childiter)) {
|
||||
stage.insert(childiter);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void CTxMemPool::remove(const CTransaction &origTx, std::list<CTransaction>& removed, bool fRecursive)
|
||||
{
|
||||
// Remove transaction from memory pool
|
||||
{
|
||||
LOCK(cs);
|
||||
std::deque<uint256> txToRemove;
|
||||
txToRemove.push_back(origTx.GetHash());
|
||||
if (fRecursive && !mapTx.count(origTx.GetHash())) {
|
||||
setEntries txToRemove;
|
||||
txiter origit = mapTx.find(origTx.GetHash());
|
||||
if (origit != mapTx.end()) {
|
||||
txToRemove.insert(origit);
|
||||
} else if (fRecursive) {
|
||||
// If recursively removing but origTx isn't in the mempool
|
||||
// be sure to remove any children that are in the pool. This can
|
||||
// happen during chain re-orgs if origTx isn't re-accepted into
|
||||
|
|
@ -126,34 +430,23 @@ void CTxMemPool::remove(const CTransaction &origTx, std::list<CTransaction>& rem
|
|||
std::map<COutPoint, CInPoint>::iterator it = mapNextTx.find(COutPoint(origTx.GetHash(), i));
|
||||
if (it == mapNextTx.end())
|
||||
continue;
|
||||
txToRemove.push_back(it->second.ptx->GetHash());
|
||||
txiter nextit = mapTx.find(it->second.ptx->GetHash());
|
||||
assert(nextit != mapTx.end());
|
||||
txToRemove.insert(nextit);
|
||||
}
|
||||
}
|
||||
while (!txToRemove.empty())
|
||||
{
|
||||
uint256 hash = txToRemove.front();
|
||||
txToRemove.pop_front();
|
||||
if (!mapTx.count(hash))
|
||||
continue;
|
||||
const CTransaction& tx = mapTx.find(hash)->GetTx();
|
||||
setEntries setAllRemoves;
|
||||
if (fRecursive) {
|
||||
for (unsigned int i = 0; i < tx.vout.size(); i++) {
|
||||
std::map<COutPoint, CInPoint>::iterator it = mapNextTx.find(COutPoint(hash, i));
|
||||
if (it == mapNextTx.end())
|
||||
continue;
|
||||
txToRemove.push_back(it->second.ptx->GetHash());
|
||||
BOOST_FOREACH(txiter it, txToRemove) {
|
||||
CalculateDescendants(it, setAllRemoves);
|
||||
}
|
||||
} else {
|
||||
setAllRemoves.swap(txToRemove);
|
||||
}
|
||||
BOOST_FOREACH(const CTxIn& txin, tx.vin)
|
||||
mapNextTx.erase(txin.prevout);
|
||||
|
||||
removed.push_back(tx);
|
||||
totalTxSize -= mapTx.find(hash)->GetTxSize();
|
||||
cachedInnerUsage -= mapTx.find(hash)->DynamicMemoryUsage();
|
||||
mapTx.erase(hash);
|
||||
nTransactionsUpdated++;
|
||||
minerPolicyEstimator->removeTx(hash);
|
||||
BOOST_FOREACH(txiter it, setAllRemoves) {
|
||||
removed.push_back(it->GetTx());
|
||||
}
|
||||
RemoveStaged(setAllRemoves);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -229,6 +522,7 @@ void CTxMemPool::removeForBlock(const std::vector<CTransaction>& vtx, unsigned i
|
|||
void CTxMemPool::clear()
|
||||
{
|
||||
LOCK(cs);
|
||||
mapLinks.clear();
|
||||
mapTx.clear();
|
||||
mapNextTx.clear();
|
||||
totalTxSize = 0;
|
||||
|
|
@ -255,7 +549,12 @@ void CTxMemPool::check(const CCoinsViewCache *pcoins) const
|
|||
checkTotal += it->GetTxSize();
|
||||
innerUsage += it->DynamicMemoryUsage();
|
||||
const CTransaction& tx = it->GetTx();
|
||||
txlinksMap::const_iterator linksiter = mapLinks.find(it);
|
||||
assert(linksiter != mapLinks.end());
|
||||
const TxLinks &links = linksiter->second;
|
||||
innerUsage += memusage::DynamicUsage(links.parents) + memusage::DynamicUsage(links.children);
|
||||
bool fDependsWait = false;
|
||||
setEntries setParentCheck;
|
||||
BOOST_FOREACH(const CTxIn &txin, tx.vin) {
|
||||
// Check that every mempool transaction's inputs refer to available coins, or other mempool tx's.
|
||||
indexed_transaction_set::const_iterator it2 = mapTx.find(txin.prevout.hash);
|
||||
|
|
@ -263,6 +562,7 @@ void CTxMemPool::check(const CCoinsViewCache *pcoins) const
|
|||
const CTransaction& tx2 = it2->GetTx();
|
||||
assert(tx2.vout.size() > txin.prevout.n && !tx2.vout[txin.prevout.n].IsNull());
|
||||
fDependsWait = true;
|
||||
setParentCheck.insert(it2);
|
||||
} else {
|
||||
const CCoins* coins = pcoins->AccessCoins(txin.prevout.hash);
|
||||
assert(coins && coins->IsAvailable(txin.prevout.n));
|
||||
|
|
@ -274,6 +574,33 @@ void CTxMemPool::check(const CCoinsViewCache *pcoins) const
|
|||
assert(it3->second.n == i);
|
||||
i++;
|
||||
}
|
||||
assert(setParentCheck == GetMemPoolParents(it));
|
||||
// Check children against mapNextTx
|
||||
CTxMemPool::setEntries setChildrenCheck;
|
||||
std::map<COutPoint, CInPoint>::const_iterator iter = mapNextTx.lower_bound(COutPoint(it->GetTx().GetHash(), 0));
|
||||
int64_t childSizes = 0;
|
||||
CAmount childFees = 0;
|
||||
for (; iter != mapNextTx.end() && iter->first.hash == it->GetTx().GetHash(); ++iter) {
|
||||
txiter childit = mapTx.find(iter->second.ptx->GetHash());
|
||||
assert(childit != mapTx.end()); // mapNextTx points to in-mempool transactions
|
||||
if (setChildrenCheck.insert(childit).second) {
|
||||
childSizes += childit->GetTxSize();
|
||||
childFees += childit->GetFee();
|
||||
}
|
||||
}
|
||||
assert(setChildrenCheck == GetMemPoolChildren(it));
|
||||
// Also check to make sure size/fees is greater than sum with immediate children.
|
||||
// just a sanity check, not definitive that this calc is correct...
|
||||
// also check that the size is less than the size of the entire mempool.
|
||||
if (!it->IsDirty()) {
|
||||
assert(it->GetSizeWithDescendants() >= childSizes + it->GetTxSize());
|
||||
assert(it->GetFeesWithDescendants() >= childFees + it->GetFee());
|
||||
} else {
|
||||
assert(it->GetSizeWithDescendants() == it->GetTxSize());
|
||||
assert(it->GetFeesWithDescendants() == it->GetFee());
|
||||
}
|
||||
assert(it->GetFeesWithDescendants() >= 0);
|
||||
|
||||
if (fDependsWait)
|
||||
waitingOnDependants.push_back(&(*it));
|
||||
else {
|
||||
|
|
@ -432,6 +759,60 @@ bool CCoinsViewMemPool::HaveCoins(const uint256 &txid) const {
|
|||
|
||||
size_t CTxMemPool::DynamicMemoryUsage() const {
|
||||
LOCK(cs);
|
||||
// Estimate the overhead of mapTx to be 6 pointers + an allocation, as no exact formula for boost::multi_index_contained is implemented.
|
||||
return memusage::MallocUsage(sizeof(CTxMemPoolEntry) + 6 * sizeof(void*)) * mapTx.size() + memusage::DynamicUsage(mapNextTx) + memusage::DynamicUsage(mapDeltas) + cachedInnerUsage;
|
||||
// Estimate the overhead of mapTx to be 9 pointers + an allocation, as no exact formula for boost::multi_index_contained is implemented.
|
||||
return memusage::MallocUsage(sizeof(CTxMemPoolEntry) + 9 * sizeof(void*)) * mapTx.size() + memusage::DynamicUsage(mapNextTx) + memusage::DynamicUsage(mapDeltas) + memusage::DynamicUsage(mapLinks) + cachedInnerUsage;
|
||||
}
|
||||
|
||||
void CTxMemPool::RemoveStaged(setEntries &stage) {
|
||||
AssertLockHeld(cs);
|
||||
UpdateForRemoveFromMempool(stage);
|
||||
BOOST_FOREACH(const txiter& it, stage) {
|
||||
removeUnchecked(it);
|
||||
}
|
||||
}
|
||||
|
||||
bool CTxMemPool::addUnchecked(const uint256&hash, const CTxMemPoolEntry &entry, bool fCurrentEstimate)
|
||||
{
|
||||
LOCK(cs);
|
||||
setEntries setAncestors;
|
||||
uint64_t nNoLimit = std::numeric_limits<uint64_t>::max();
|
||||
std::string dummy;
|
||||
CalculateMemPoolAncestors(entry, setAncestors, nNoLimit, nNoLimit, nNoLimit, nNoLimit, dummy);
|
||||
return addUnchecked(hash, entry, setAncestors, fCurrentEstimate);
|
||||
}
|
||||
|
||||
void CTxMemPool::UpdateChild(txiter entry, txiter child, bool add)
|
||||
{
|
||||
setEntries s;
|
||||
if (add && mapLinks[entry].children.insert(child).second) {
|
||||
cachedInnerUsage += memusage::IncrementalDynamicUsage(s);
|
||||
} else if (!add && mapLinks[entry].children.erase(child)) {
|
||||
cachedInnerUsage -= memusage::IncrementalDynamicUsage(s);
|
||||
}
|
||||
}
|
||||
|
||||
void CTxMemPool::UpdateParent(txiter entry, txiter parent, bool add)
|
||||
{
|
||||
setEntries s;
|
||||
if (add && mapLinks[entry].parents.insert(parent).second) {
|
||||
cachedInnerUsage += memusage::IncrementalDynamicUsage(s);
|
||||
} else if (!add && mapLinks[entry].parents.erase(parent)) {
|
||||
cachedInnerUsage -= memusage::IncrementalDynamicUsage(s);
|
||||
}
|
||||
}
|
||||
|
||||
const CTxMemPool::setEntries & CTxMemPool::GetMemPoolParents(txiter entry) const
|
||||
{
|
||||
assert (entry != mapTx.end());
|
||||
txlinksMap::const_iterator it = mapLinks.find(entry);
|
||||
assert(it != mapLinks.end());
|
||||
return it->second.parents;
|
||||
}
|
||||
|
||||
const CTxMemPool::setEntries & CTxMemPool::GetMemPoolChildren(txiter entry) const
|
||||
{
|
||||
assert (entry != mapTx.end());
|
||||
txlinksMap::const_iterator it = mapLinks.find(entry);
|
||||
assert(it != mapLinks.end());
|
||||
return it->second.children;
|
||||
}
|
||||
|
|
|
|||
273
src/txmempool.h
273
src/txmempool.h
|
|
@ -7,6 +7,7 @@
|
|||
#define BITCOIN_TXMEMPOOL_H
|
||||
|
||||
#include <list>
|
||||
#include <set>
|
||||
|
||||
#include "amount.h"
|
||||
#include "coins.h"
|
||||
|
|
@ -34,9 +35,25 @@ inline bool AllowFree(double dPriority)
|
|||
/** Fake height value used in CCoins to signify they are only in the memory pool (since 0.8) */
|
||||
static const unsigned int MEMPOOL_HEIGHT = 0x7FFFFFFF;
|
||||
|
||||
/**
|
||||
* CTxMemPool stores these:
|
||||
class CTxMemPool;
|
||||
|
||||
/** \class CTxMemPoolEntry
|
||||
*
|
||||
* CTxMemPoolEntry stores data about the correponding transaction, as well
|
||||
* as data about all in-mempool transactions that depend on the transaction
|
||||
* ("descendant" transactions).
|
||||
*
|
||||
* When a new entry is added to the mempool, we update the descendant state
|
||||
* (nCountWithDescendants, nSizeWithDescendants, and nFeesWithDescendants) for
|
||||
* all ancestors of the newly added transaction.
|
||||
*
|
||||
* If updating the descendant state is skipped, we can mark the entry as
|
||||
* "dirty", and set nSizeWithDescendants/nFeesWithDescendants to equal nTxSize/
|
||||
* nTxFee. (This can potentially happen during a reorg, where we limit the
|
||||
* amount of work we're willing to do to avoid consuming too much CPU.)
|
||||
*
|
||||
*/
|
||||
|
||||
class CTxMemPoolEntry
|
||||
{
|
||||
private:
|
||||
|
|
@ -45,27 +62,69 @@ private:
|
|||
size_t nTxSize; //! ... and avoid recomputing tx size
|
||||
size_t nModSize; //! ... and modified size for priority
|
||||
size_t nUsageSize; //! ... and total memory usage
|
||||
CFeeRate feeRate; //! ... and fee per kB
|
||||
int64_t nTime; //! Local time when entering the mempool
|
||||
double dPriority; //! Priority when entering the mempool
|
||||
unsigned int nHeight; //! Chain height when entering the mempool
|
||||
bool hadNoDependencies; //! Not dependent on any other txs when it entered the mempool
|
||||
|
||||
// Information about descendants of this transaction that are in the
|
||||
// mempool; if we remove this transaction we must remove all of these
|
||||
// descendants as well. if nCountWithDescendants is 0, treat this entry as
|
||||
// dirty, and nSizeWithDescendants and nFeesWithDescendants will not be
|
||||
// correct.
|
||||
uint64_t nCountWithDescendants; //! number of descendant transactions
|
||||
uint64_t nSizeWithDescendants; //! ... and size
|
||||
CAmount nFeesWithDescendants; //! ... and total fees (all including us)
|
||||
|
||||
public:
|
||||
CTxMemPoolEntry(const CTransaction& _tx, const CAmount& _nFee,
|
||||
int64_t _nTime, double _dPriority, unsigned int _nHeight, bool poolHasNoInputsOf = false);
|
||||
CTxMemPoolEntry();
|
||||
CTxMemPoolEntry(const CTxMemPoolEntry& other);
|
||||
|
||||
const CTransaction& GetTx() const { return this->tx; }
|
||||
double GetPriority(unsigned int currentHeight) const;
|
||||
CAmount GetFee() const { return nFee; }
|
||||
CFeeRate GetFeeRate() const { return feeRate; }
|
||||
size_t GetTxSize() const { return nTxSize; }
|
||||
int64_t GetTime() const { return nTime; }
|
||||
unsigned int GetHeight() const { return nHeight; }
|
||||
bool WasClearAtEntry() const { return hadNoDependencies; }
|
||||
size_t DynamicMemoryUsage() const { return nUsageSize; }
|
||||
|
||||
// Adjusts the descendant state, if this entry is not dirty.
|
||||
void UpdateState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount);
|
||||
|
||||
/** We can set the entry to be dirty if doing the full calculation of in-
|
||||
* mempool descendants will be too expensive, which can potentially happen
|
||||
* when re-adding transactions from a block back to the mempool.
|
||||
*/
|
||||
void SetDirty();
|
||||
bool IsDirty() const { return nCountWithDescendants == 0; }
|
||||
|
||||
uint64_t GetCountWithDescendants() const { return nCountWithDescendants; }
|
||||
uint64_t GetSizeWithDescendants() const { return nSizeWithDescendants; }
|
||||
CAmount GetFeesWithDescendants() const { return nFeesWithDescendants; }
|
||||
};
|
||||
|
||||
// Helpers for modifying CTxMemPool::mapTx, which is a boost multi_index.
|
||||
struct update_descendant_state
|
||||
{
|
||||
update_descendant_state(int64_t _modifySize, CAmount _modifyFee, int64_t _modifyCount) :
|
||||
modifySize(_modifySize), modifyFee(_modifyFee), modifyCount(_modifyCount)
|
||||
{}
|
||||
|
||||
void operator() (CTxMemPoolEntry &e)
|
||||
{ e.UpdateState(modifySize, modifyFee, modifyCount); }
|
||||
|
||||
private:
|
||||
int64_t modifySize;
|
||||
CAmount modifyFee;
|
||||
int64_t modifyCount;
|
||||
};
|
||||
|
||||
struct set_dirty
|
||||
{
|
||||
void operator() (CTxMemPoolEntry &e)
|
||||
{ e.SetDirty(); }
|
||||
};
|
||||
|
||||
// extracts a TxMemPoolEntry's transaction hash
|
||||
|
|
@ -78,14 +137,49 @@ struct mempoolentry_txid
|
|||
}
|
||||
};
|
||||
|
||||
/** \class CompareTxMemPoolEntryByFee
|
||||
*
|
||||
* Sort an entry by max(feerate of entry's tx, feerate with all descendants).
|
||||
*/
|
||||
class CompareTxMemPoolEntryByFee
|
||||
{
|
||||
public:
|
||||
bool operator()(const CTxMemPoolEntry& a, const CTxMemPoolEntry& b)
|
||||
{
|
||||
if (a.GetFeeRate() == b.GetFeeRate())
|
||||
bool fUseADescendants = UseDescendantFeeRate(a);
|
||||
bool fUseBDescendants = UseDescendantFeeRate(b);
|
||||
|
||||
double aFees = fUseADescendants ? a.GetFeesWithDescendants() : a.GetFee();
|
||||
double aSize = fUseADescendants ? a.GetSizeWithDescendants() : a.GetTxSize();
|
||||
|
||||
double bFees = fUseBDescendants ? b.GetFeesWithDescendants() : b.GetFee();
|
||||
double bSize = fUseBDescendants ? b.GetSizeWithDescendants() : b.GetTxSize();
|
||||
|
||||
// Avoid division by rewriting (a/b > c/d) as (a*d > c*b).
|
||||
double f1 = aFees * bSize;
|
||||
double f2 = aSize * bFees;
|
||||
|
||||
if (f1 == f2) {
|
||||
return a.GetTime() < b.GetTime();
|
||||
}
|
||||
return f1 > f2;
|
||||
}
|
||||
|
||||
// Calculate which feerate to use for an entry (avoiding division).
|
||||
bool UseDescendantFeeRate(const CTxMemPoolEntry &a)
|
||||
{
|
||||
double f1 = (double)a.GetFee() * a.GetSizeWithDescendants();
|
||||
double f2 = (double)a.GetFeesWithDescendants() * a.GetTxSize();
|
||||
return f2 > f1;
|
||||
}
|
||||
};
|
||||
|
||||
class CompareTxMemPoolEntryByEntryTime
|
||||
{
|
||||
public:
|
||||
bool operator()(const CTxMemPoolEntry& a, const CTxMemPoolEntry& b)
|
||||
{
|
||||
return a.GetTime() < b.GetTime();
|
||||
return a.GetFeeRate() > b.GetFeeRate();
|
||||
}
|
||||
};
|
||||
|
||||
|
|
@ -114,6 +208,71 @@ public:
|
|||
* are added to the pool: if a new transaction double-spends
|
||||
* an input of a transaction in the pool, it is dropped,
|
||||
* as are non-standard transactions.
|
||||
*
|
||||
* CTxMemPool::mapTx, and CTxMemPoolEntry bookkeeping:
|
||||
*
|
||||
* mapTx is a boost::multi_index that sorts the mempool on 2 criteria:
|
||||
* - transaction hash
|
||||
* - feerate [we use max(feerate of tx, feerate of tx with all descendants)]
|
||||
*
|
||||
* Note: the term "descendant" refers to in-mempool transactions that depend on
|
||||
* this one, while "ancestor" refers to in-mempool transactions that a given
|
||||
* transaction depends on.
|
||||
*
|
||||
* In order for the feerate sort to remain correct, we must update transactions
|
||||
* in the mempool when new descendants arrive. To facilitate this, we track
|
||||
* the set of in-mempool direct parents and direct children in mapLinks. Within
|
||||
* each CTxMemPoolEntry, we track the size and fees of all descendants.
|
||||
*
|
||||
* Usually when a new transaction is added to the mempool, it has no in-mempool
|
||||
* children (because any such children would be an orphan). So in
|
||||
* addUnchecked(), we:
|
||||
* - update a new entry's setMemPoolParents to include all in-mempool parents
|
||||
* - update the new entry's direct parents to include the new tx as a child
|
||||
* - update all ancestors of the transaction to include the new tx's size/fee
|
||||
*
|
||||
* When a transaction is removed from the mempool, we must:
|
||||
* - update all in-mempool parents to not track the tx in setMemPoolChildren
|
||||
* - update all ancestors to not include the tx's size/fees in descendant state
|
||||
* - update all in-mempool children to not include it as a parent
|
||||
*
|
||||
* These happen in UpdateForRemoveFromMempool(). (Note that when removing a
|
||||
* transaction along with its descendants, we must calculate that set of
|
||||
* transactions to be removed before doing the removal, or else the mempool can
|
||||
* be in an inconsistent state where it's impossible to walk the ancestors of
|
||||
* a transaction.)
|
||||
*
|
||||
* In the event of a reorg, the assumption that a newly added tx has no
|
||||
* in-mempool children is false. In particular, the mempool is in an
|
||||
* inconsistent state while new transactions are being added, because there may
|
||||
* be descendant transactions of a tx coming from a disconnected block that are
|
||||
* unreachable from just looking at transactions in the mempool (the linking
|
||||
* transactions may also be in the disconnected block, waiting to be added).
|
||||
* Because of this, there's not much benefit in trying to search for in-mempool
|
||||
* children in addUnchecked(). Instead, in the special case of transactions
|
||||
* being added from a disconnected block, we require the caller to clean up the
|
||||
* state, to account for in-mempool, out-of-block descendants for all the
|
||||
* in-block transactions by calling UpdateTransactionsFromBlock(). Note that
|
||||
* until this is called, the mempool state is not consistent, and in particular
|
||||
* mapLinks may not be correct (and therefore functions like
|
||||
* CalculateMemPoolAncestors() and CalculateDescendants() that rely
|
||||
* on them to walk the mempool are not generally safe to use).
|
||||
*
|
||||
* Computational limits:
|
||||
*
|
||||
* Updating all in-mempool ancestors of a newly added transaction can be slow,
|
||||
* if no bound exists on how many in-mempool ancestors there may be.
|
||||
* CalculateMemPoolAncestors() takes configurable limits that are designed to
|
||||
* prevent these calculations from being too CPU intensive.
|
||||
*
|
||||
* Adding transactions from a disconnected block can be very time consuming,
|
||||
* because we don't have a way to limit the number of in-mempool descendants.
|
||||
* To bound CPU processing, we limit the amount of work we're willing to do
|
||||
* to properly update the descendant information for a tx being added from
|
||||
* a disconnected block. If we would exceed the limit, then we instead mark
|
||||
* the entry as "dirty", and set the feerate for sorting purposes to be equal
|
||||
* the feerate of the transaction without any descendants.
|
||||
*
|
||||
*/
|
||||
class CTxMemPool
|
||||
{
|
||||
|
|
@ -141,6 +300,31 @@ public:
|
|||
|
||||
mutable CCriticalSection cs;
|
||||
indexed_transaction_set mapTx;
|
||||
typedef indexed_transaction_set::nth_index<0>::type::iterator txiter;
|
||||
struct CompareIteratorByHash {
|
||||
bool operator()(const txiter &a, const txiter &b) const {
|
||||
return a->GetTx().GetHash() < b->GetTx().GetHash();
|
||||
}
|
||||
};
|
||||
typedef std::set<txiter, CompareIteratorByHash> setEntries;
|
||||
|
||||
private:
|
||||
typedef std::map<txiter, setEntries, CompareIteratorByHash> cacheMap;
|
||||
|
||||
struct TxLinks {
|
||||
setEntries parents;
|
||||
setEntries children;
|
||||
};
|
||||
|
||||
typedef std::map<txiter, TxLinks, CompareIteratorByHash> txlinksMap;
|
||||
txlinksMap mapLinks;
|
||||
|
||||
const setEntries & GetMemPoolParents(txiter entry) const;
|
||||
const setEntries & GetMemPoolChildren(txiter entry) const;
|
||||
void UpdateParent(txiter entry, txiter parent, bool add);
|
||||
void UpdateChild(txiter entry, txiter child, bool add);
|
||||
|
||||
public:
|
||||
std::map<COutPoint, CInPoint> mapNextTx;
|
||||
std::map<uint256, std::pair<double, CAmount> > mapDeltas;
|
||||
|
||||
|
|
@ -156,7 +340,13 @@ public:
|
|||
void check(const CCoinsViewCache *pcoins) const;
|
||||
void setSanityCheck(bool _fSanityCheck) { fSanityCheck = _fSanityCheck; }
|
||||
|
||||
// addUnchecked must updated state for all ancestors of a given transaction,
|
||||
// to track size/count of descendant transactions. First version of
|
||||
// addUnchecked can be used to have it call CalculateMemPoolAncestors(), and
|
||||
// then invoke the second version.
|
||||
bool addUnchecked(const uint256& hash, const CTxMemPoolEntry &entry, bool fCurrentEstimate = true);
|
||||
bool addUnchecked(const uint256& hash, const CTxMemPoolEntry &entry, setEntries &setAncestors, bool fCurrentEstimate = true);
|
||||
|
||||
void remove(const CTransaction &tx, std::list<CTransaction>& removed, bool fRecursive = false);
|
||||
void removeCoinbaseSpends(const CCoinsViewCache *pcoins, unsigned int nMemPoolHeight);
|
||||
void removeConflicts(const CTransaction &tx, std::list<CTransaction>& removed);
|
||||
|
|
@ -178,6 +368,33 @@ public:
|
|||
void ApplyDeltas(const uint256 hash, double &dPriorityDelta, CAmount &nFeeDelta);
|
||||
void ClearPrioritisation(const uint256 hash);
|
||||
|
||||
public:
|
||||
/** Remove a set of transactions from the mempool.
|
||||
* If a transaction is in this set, then all in-mempool descendants must
|
||||
* also be in the set.*/
|
||||
void RemoveStaged(setEntries &stage);
|
||||
|
||||
/** When adding transactions from a disconnected block back to the mempool,
|
||||
* new mempool entries may have children in the mempool (which is generally
|
||||
* not the case when otherwise adding transactions).
|
||||
* UpdateTransactionsFromBlock() will find child transactions and update the
|
||||
* descendant state for each transaction in hashesToUpdate (excluding any
|
||||
* child transactions present in hashesToUpdate, which are already accounted
|
||||
* for). Note: hashesToUpdate should be the set of transactions from the
|
||||
* disconnected block that have been accepted back into the mempool.
|
||||
*/
|
||||
void UpdateTransactionsFromBlock(const std::vector<uint256> &hashesToUpdate);
|
||||
|
||||
/** Try to calculate all in-mempool ancestors of entry.
|
||||
* (these are all calculated including the tx itself)
|
||||
* limitAncestorCount = max number of ancestors
|
||||
* limitAncestorSize = max size of ancestors
|
||||
* limitDescendantCount = max number of descendants any ancestor can have
|
||||
* limitDescendantSize = max size of descendants any ancestor can have
|
||||
* errString = populated with error reason if any limits are hit
|
||||
*/
|
||||
bool CalculateMemPoolAncestors(const CTxMemPoolEntry &entry, setEntries &setAncestors, uint64_t limitAncestorCount, uint64_t limitAncestorSize, uint64_t limitDescendantCount, uint64_t limitDescendantSize, std::string &errString);
|
||||
|
||||
unsigned long size()
|
||||
{
|
||||
LOCK(cs);
|
||||
|
|
@ -209,6 +426,48 @@ public:
|
|||
bool ReadFeeEstimates(CAutoFile& filein);
|
||||
|
||||
size_t DynamicMemoryUsage() const;
|
||||
|
||||
private:
|
||||
/** UpdateForDescendants is used by UpdateTransactionsFromBlock to update
|
||||
* the descendants for a single transaction that has been added to the
|
||||
* mempool but may have child transactions in the mempool, eg during a
|
||||
* chain reorg. setExclude is the set of descendant transactions in the
|
||||
* mempool that must not be accounted for (because any descendants in
|
||||
* setExclude were added to the mempool after the transaction being
|
||||
* updated and hence their state is already reflected in the parent
|
||||
* state).
|
||||
*
|
||||
* If updating an entry requires looking at more than maxDescendantsToVisit
|
||||
* transactions, outside of the ones in setExclude, then give up.
|
||||
*
|
||||
* cachedDescendants will be updated with the descendants of the transaction
|
||||
* being updated, so that future invocations don't need to walk the
|
||||
* same transaction again, if encountered in another transaction chain.
|
||||
*/
|
||||
bool UpdateForDescendants(txiter updateIt,
|
||||
int maxDescendantsToVisit,
|
||||
cacheMap &cachedDescendants,
|
||||
const std::set<uint256> &setExclude);
|
||||
/** Update ancestors of hash to add/remove it as a descendant transaction. */
|
||||
void UpdateAncestorsOf(bool add, txiter hash, setEntries &setAncestors);
|
||||
/** For each transaction being removed, update ancestors and any direct children. */
|
||||
void UpdateForRemoveFromMempool(const setEntries &entriesToRemove);
|
||||
/** Sever link between specified transaction and direct children. */
|
||||
void UpdateChildrenForRemoval(txiter entry);
|
||||
/** Populate setDescendants with all in-mempool descendants of hash.
|
||||
* Assumes that setDescendants includes all in-mempool descendants of anything
|
||||
* already in it. */
|
||||
void CalculateDescendants(txiter it, setEntries &setDescendants);
|
||||
|
||||
/** Before calling removeUnchecked for a given transaction,
|
||||
* UpdateForRemoveFromMempool must be called on the entire (dependent) set
|
||||
* of transactions being removed at the same time. We use each
|
||||
* CTxMemPoolEntry's setMemPoolParents in order to walk ancestors of a
|
||||
* given transaction that is removed, so we can't remove intermediate
|
||||
* transactions in a chain before we've updated all the state for the
|
||||
* removal.
|
||||
*/
|
||||
void removeUnchecked(txiter entry);
|
||||
};
|
||||
|
||||
/**
|
||||
|
|
|
|||
Loading…
Reference in a new issue