aboutsummaryrefslogtreecommitdiff
path: root/src/policy
diff options
context:
space:
mode:
Diffstat (limited to 'src/policy')
-rw-r--r--src/policy/fees.cpp2
-rw-r--r--src/policy/fees.h6
-rw-r--r--src/policy/policy.cpp42
-rw-r--r--src/policy/policy.h2
-rw-r--r--src/policy/rbf.cpp46
-rw-r--r--src/policy/rbf.h20
6 files changed, 78 insertions, 40 deletions
diff --git a/src/policy/fees.cpp b/src/policy/fees.cpp
index 980ecf10df..de3c060d6a 100644
--- a/src/policy/fees.cpp
+++ b/src/policy/fees.cpp
@@ -87,7 +87,7 @@ double TxConfirmStats::EstimateMedianVal(int confTarget, double sufficientTxVal,
int maxbucketindex = buckets.size() - 1;
// requireGreater means we are looking for the lowest fee/priority such that all higher
- // values pass, so we start at maxbucketindex (highest fee) and look at succesively
+ // values pass, so we start at maxbucketindex (highest fee) and look at successively
// smaller buckets until we reach failure. Otherwise, we are looking for the highest
// fee/priority such that all lower values fail, and we go in the opposite direction.
unsigned int startbucket = requireGreater ? maxbucketindex : 0;
diff --git a/src/policy/fees.h b/src/policy/fees.h
index 7a293267d4..3fa31c39e7 100644
--- a/src/policy/fees.h
+++ b/src/policy/fees.h
@@ -29,7 +29,7 @@ class CTxMemPool;
* included in blocks before transactions of lower fee/priority. So for
* example if you wanted to know what fee you should put on a transaction to
* be included in a block within the next 5 blocks, you would start by looking
- * at the bucket with with the highest fee transactions and verifying that a
+ * at the bucket with the highest fee transactions and verifying that a
* sufficiently high percentage of them were confirmed within 5 blocks and
* then you would look at the next highest fee bucket, and so on, stopping at
* the last bucket to pass the test. The average fee of transactions in this
@@ -87,13 +87,13 @@ private:
// Count the total # of txs in each bucket
// Track the historical moving average of this total over blocks
std::vector<double> txCtAvg;
- // and calcuate the total for the current block to update the moving average
+ // and calculate the total for the current block to update the moving average
std::vector<int> curBlockTxCt;
// Count the total # of txs confirmed within Y blocks in each bucket
// Track the historical moving average of theses totals over blocks
std::vector<std::vector<double> > confAvg; // confAvg[Y][X]
- // and calcuate the totals for the current block to update the moving averages
+ // and calculate the totals for the current block to update the moving averages
std::vector<std::vector<int> > curBlockConf; // curBlockConf[Y][X]
// Sum the total priority/fee of all tx's in each bucket
diff --git a/src/policy/policy.cpp b/src/policy/policy.cpp
index 46c7f18942..332abc430e 100644
--- a/src/policy/policy.cpp
+++ b/src/policy/policy.cpp
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
+// Copyright (c) 2009-2015 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
@@ -23,9 +23,6 @@
* 2. P2SH scripts with a crazy number of expensive
* CHECKSIG/CHECKMULTISIG operations
*
- * Check transaction inputs, and make sure any
- * pay-to-script-hash transactions are evaluating IsStandard scripts
- *
* Why bother? To avoid denial-of-service attacks; an attacker
* can submit a standard HASH... OP_EQUAL transaction,
* which will get accepted into blocks. The redemption
@@ -135,45 +132,20 @@ bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs)
const CScript& prevScript = prev.scriptPubKey;
if (!Solver(prevScript, whichType, vSolutions))
return false;
- int nArgsExpected = ScriptSigArgsExpected(whichType, vSolutions);
- if (nArgsExpected < 0)
- return false;
-
- // Transactions with extra stuff in their scriptSigs are
- // non-standard. Note that this EvalScript() call will
- // be quick, because if there are any operations
- // beside "push data" in the scriptSig
- // IsStandardTx() will have already returned false
- // and this method isn't called.
- std::vector<std::vector<unsigned char> > stack;
- if (!EvalScript(stack, tx.vin[i].scriptSig, SCRIPT_VERIFY_NONE, BaseSignatureChecker()))
- return false;
if (whichType == TX_SCRIPTHASH)
{
+ std::vector<std::vector<unsigned char> > stack;
+ // convert the scriptSig into a stack, so we can inspect the redeemScript
+ if (!EvalScript(stack, tx.vin[i].scriptSig, SCRIPT_VERIFY_NONE, BaseSignatureChecker(), 0))
+ return false;
if (stack.empty())
return false;
CScript subscript(stack.back().begin(), stack.back().end());
- std::vector<std::vector<unsigned char> > vSolutions2;
- txnouttype whichType2;
- if (Solver(subscript, whichType2, vSolutions2))
- {
- int tmpExpected = ScriptSigArgsExpected(whichType2, vSolutions2);
- if (tmpExpected < 0)
- return false;
- nArgsExpected += tmpExpected;
- }
- else
- {
- // Any other Script with less than 15 sigops OK:
- unsigned int sigops = subscript.GetSigOpCount(true);
- // ... extra data left on the stack after execution is OK, too:
- return (sigops <= MAX_P2SH_SIGOPS);
+ if (subscript.GetSigOpCount(true) > MAX_P2SH_SIGOPS) {
+ return false;
}
}
-
- if (stack.size() != (unsigned int)nArgsExpected)
- return false;
}
return true;
diff --git a/src/policy/policy.h b/src/policy/policy.h
index f25dbf22d5..aabeebb25d 100644
--- a/src/policy/policy.h
+++ b/src/policy/policy.h
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
+// Copyright (c) 2009-2015 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/policy/rbf.cpp b/src/policy/rbf.cpp
new file mode 100644
index 0000000000..98b1a1ba4c
--- /dev/null
+++ b/src/policy/rbf.cpp
@@ -0,0 +1,46 @@
+// Copyright (c) 2016 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "policy/rbf.h"
+
+bool SignalsOptInRBF(const CTransaction &tx)
+{
+ BOOST_FOREACH(const CTxIn &txin, tx.vin) {
+ if (txin.nSequence < std::numeric_limits<unsigned int>::max()-1) {
+ return true;
+ }
+ }
+ return false;
+}
+
+bool IsRBFOptIn(const CTxMemPoolEntry &entry, CTxMemPool &pool)
+{
+ AssertLockHeld(pool.cs);
+
+ CTxMemPool::setEntries setAncestors;
+
+ // First check the transaction itself.
+ if (SignalsOptInRBF(entry.GetTx())) {
+ return true;
+ }
+
+ // If this transaction is not in our mempool, then we can't be sure
+ // we will know about all its inputs.
+ if (!pool.exists(entry.GetTx().GetHash())) {
+ throw std::runtime_error("Cannot determine RBF opt-in signal for non-mempool transaction\n");
+ }
+
+ // If all the inputs have nSequence >= maxint-1, it still might be
+ // signaled for RBF if any unconfirmed parents have signaled.
+ uint64_t noLimit = std::numeric_limits<uint64_t>::max();
+ std::string dummy;
+ pool.CalculateMemPoolAncestors(entry, setAncestors, noLimit, noLimit, noLimit, noLimit, dummy, false);
+
+ BOOST_FOREACH(CTxMemPool::txiter it, setAncestors) {
+ if (SignalsOptInRBF(it->GetTx())) {
+ return true;
+ }
+ }
+ return false;
+}
diff --git a/src/policy/rbf.h b/src/policy/rbf.h
new file mode 100644
index 0000000000..925ce0d9bd
--- /dev/null
+++ b/src/policy/rbf.h
@@ -0,0 +1,20 @@
+// Copyright (c) 2016 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_POLICY_RBF_H
+#define BITCOIN_POLICY_RBF_H
+
+#include "txmempool.h"
+
+// Check whether the sequence numbers on this transaction are signaling
+// opt-in to replace-by-fee, according to BIP 125
+bool SignalsOptInRBF(const CTransaction &tx);
+
+// Determine whether an in-mempool transaction is signaling opt-in to RBF
+// according to BIP 125
+// This involves checking sequence numbers of the transaction, as well
+// as the sequence numbers of all in-mempool ancestors.
+bool IsRBFOptIn(const CTxMemPoolEntry &entry, CTxMemPool &pool);
+
+#endif // BITCOIN_POLICY_RBF_H
generated by cgit v1.2.3 (git 2.26.2) at 2024-07-16 10:56:26 +0000