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authorSuhas Daftuar <sdaftuar@chaincode.com>2015-12-16 14:57:54 -0500
committerSuhas Daftuar <sdaftuar@gmail.com>2016-01-19 08:30:04 -0500
commiteaa8d2754b48b62cdd07255fc3028feecad0c095 (patch)
treeb8d312d93e9ec123af0ba08034ab5df18ce6f2e7 /src/policy/rbf.cpp
parentf9fd4c2884849bc667da3da8bf5f78f33dd01f1c (diff)
RPC: indicate which transactions are replaceable
Add "bip125-replaceable" output field to listtransactions and gettransaction which indicates if an unconfirmed transaction, or any unconfirmed parent, is signaling opt-in RBF according to BIP 125.
Diffstat (limited to 'src/policy/rbf.cpp')
-rw-r--r--src/policy/rbf.cpp46
1 files changed, 46 insertions, 0 deletions
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;
+}