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Add option -permitrbf to set transaction replacement policy

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Add a configuration option `-permitrbf` to set transaction replacement policy
for the mempool.

Enabling it will enable (opt-in) RBF, disabling it will refuse all
conflicting transactions.
This commit is contained in:
Wladimir J. van der Laan 2016-01-21 11:11:01 +01:00
parent ae2db67fee
commit b768108d9c
3 changed files with 13 additions and 4 deletions
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2
src/init.cpp
View file

@ -367,6 +367,7 @@ std::string HelpMessage(HelpMessageMode mode)
strUsage += HelpMessageOpt("-onion=<ip:port>", strprintf(_("Use separate SOCKS5 proxy to reach peers via Tor hidden services (default: %s)"), "-proxy"));
strUsage += HelpMessageOpt("-onlynet=<net>", _("Only connect to nodes in network <net> (ipv4, ipv6 or onion)"));
strUsage += HelpMessageOpt("-permitbaremultisig", strprintf(_("Relay non-P2SH multisig (default: %u)"), DEFAULT_PERMIT_BAREMULTISIG));
strUsage += HelpMessageOpt("-permitrbf", strprintf(_("Permit transaction replacement (default: %u)"), DEFAULT_PERMIT_REPLACEMENT));
strUsage += HelpMessageOpt("-peerbloomfilters", strprintf(_("Support filtering of blocks and transaction with bloom filters (default: %u)"), 1));
if (showDebug)
strUsage += HelpMessageOpt("-enforcenodebloom", strprintf("Enforce minimum protocol version to limit use of bloom filters (default: %u)", 0));
@ -1029,6 +1030,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
nLocalServices |= NODE_BLOOM;
nMaxTipAge = GetArg("-maxtipage", DEFAULT_MAX_TIP_AGE);
fPermitReplacement = GetBoolArg("-permitrbf", DEFAULT_PERMIT_REPLACEMENT);
// ********************************************************* Step 4: application initialization: dir lock, daemonize, pidfile, debug log

12
src/main.cpp
View file

@ -78,6 +78,7 @@ bool fAlerts = DEFAULT_ALERTS;
/* If the tip is older than this (in seconds), the node is considered to be in initial block download.
*/
int64_t nMaxTipAge = DEFAULT_MAX_TIP_AGE;
bool fPermitReplacement = DEFAULT_PERMIT_REPLACEMENT;
/** Fees smaller than this (in satoshi) are considered zero fee (for relaying, mining and transaction creation) */
CFeeRate minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE);
@ -868,12 +869,15 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState &state, const C
// unconfirmed ancestors anyway; doing otherwise is hopelessly
// insecure.
bool fReplacementOptOut = true;
BOOST_FOREACH(const CTxIn &txin, ptxConflicting->vin)
if (fPermitReplacement)
{
if (txin.nSequence < std::numeric_limits<unsigned int>::max()-1)
BOOST_FOREACH(const CTxIn &txin, ptxConflicting->vin)
{
fReplacementOptOut = false;
break;
if (txin.nSequence < std::numeric_limits<unsigned int>::max()-1)
{
fReplacementOptOut = false;
break;
}
}
}
if (fReplacementOptOut)

3
src/main.h
View file

@ -107,6 +107,8 @@ static const bool DEFAULT_TXINDEX = false;
static const unsigned int DEFAULT_BANSCORE_THRESHOLD = 100;
static const bool DEFAULT_TESTSAFEMODE = false;
/** Default for -permitrbf */
static const bool DEFAULT_PERMIT_REPLACEMENT = true;
/** Maximum number of headers to announce when relaying blocks with headers message.*/
static const unsigned int MAX_BLOCKS_TO_ANNOUNCE = 8;
@ -139,6 +141,7 @@ extern size_t nCoinCacheUsage;
extern CFeeRate minRelayTxFee;
extern bool fAlerts;
extern int64_t nMaxTipAge;
extern bool fPermitReplacement;
/** Best header we've seen so far (used for getheaders queries' starting points). */
extern CBlockIndex *pindexBestHeader;