Merge #7440: [0.12] Rename permitrbf to mempoolreplacement and provide minimal string-list forward compatibility

af9f564 release-notes: Update for replacebyfee->mempoolreplacement rename (Luke Dashjr)
4ad418b Rename replacebyfee=opt-in to mempoolreplacement=fee (Luke Dashjr)
b2287a7 release-notes: Update for permitrbf->replacebyfee rename (Luke Dashjr)
5f456a6 Simplify check for replacebyfee=opt-in (Luke Dashjr)
e8d19ab Accept replacebyfee=opt-in for turning on opt-in RBF (Luke Dashjr)
1205f87 Rename permitrbf to replacebyfee (Luke Dashjr)

3 files changed, 16 insertions, 7 deletions

diff --git a/src/init.cpp b/src/init.cpp
index 57eafd2a24..71a9eae861 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -47,8 +47,10 @@
 #include <signal.h>
 #endif
 
+#include <boost/algorithm/string/classification.hpp>
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/algorithm/string/replace.hpp>
+#include <boost/algorithm/string/split.hpp>
 #include <boost/bind.hpp>
 #include <boost/filesystem.hpp>
 #include <boost/function.hpp>
@@ -367,7 +369,6 @@ 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));
@@ -488,6 +489,7 @@ std::string HelpMessage(HelpMessageMode mode)
     strUsage += HelpMessageOpt("-bytespersigop", strprintf(_("Minimum bytes per sigop in transactions we relay and mine (default: %u)"), DEFAULT_BYTES_PER_SIGOP));
     strUsage += HelpMessageOpt("-datacarrier", strprintf(_("Relay and mine data carrier transactions (default: %u)"), DEFAULT_ACCEPT_DATACARRIER));
     strUsage += HelpMessageOpt("-datacarriersize", strprintf(_("Maximum size of data in data carrier transactions we relay and mine (default: %u)"), MAX_OP_RETURN_RELAY));
+    strUsage += HelpMessageOpt("-mempoolreplacement", strprintf(_("Enable transaction replacement in the memory pool (default: %u)"), DEFAULT_ENABLE_REPLACEMENT));
 
     strUsage += HelpMessageGroup(_("Block creation options:"));
     strUsage += HelpMessageOpt("-blockminsize=<n>", strprintf(_("Set minimum block size in bytes (default: %u)"), DEFAULT_BLOCK_MIN_SIZE));
@@ -1026,7 +1028,14 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
     if (GetBoolArg("-peerbloomfilters", true))
         nLocalServices |= NODE_BLOOM;
 
-    fPermitReplacement = GetBoolArg("-permitrbf", DEFAULT_PERMIT_REPLACEMENT);
+    fEnableReplacement = GetBoolArg("-mempoolreplacement", DEFAULT_ENABLE_REPLACEMENT);
+    if ((!fEnableReplacement) && mapArgs.count("-mempoolreplacement")) {
+        // Minimal effort at forwards compatibility
+        std::string strReplacementModeList = GetArg("-mempoolreplacement", "");  // default is impossible
+        std::vector<std::string> vstrReplacementModes;
+        boost::split(vstrReplacementModes, strReplacementModeList, boost::is_any_of(","));
+        fEnableReplacement = (std::find(vstrReplacementModes.begin(), vstrReplacementModes.end(), "fee") != vstrReplacementModes.end());
+    }
 
     // ********************************************************* Step 4: application initialization: dir lock, daemonize, pidfile, debug log
 
diff --git a/src/main.cpp b/src/main.cpp
index 7bfc985747..359167961b 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -75,7 +75,7 @@ bool fCheckpointsEnabled = DEFAULT_CHECKPOINTS_ENABLED;
 size_t nCoinCacheUsage = 5000 * 300;
 uint64_t nPruneTarget = 0;
 bool fAlerts = DEFAULT_ALERTS;
-bool fPermitReplacement = DEFAULT_PERMIT_REPLACEMENT;
+bool fEnableReplacement = DEFAULT_ENABLE_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);
@@ -866,7 +866,7 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState &state, const C
                 // unconfirmed ancestors anyway; doing otherwise is hopelessly
                 // insecure.
                 bool fReplacementOptOut = true;
-                if (fPermitReplacement)
+                if (fEnableReplacement)
                 {
                     BOOST_FOREACH(const CTxIn &txin, ptxConflicting->vin)
                     {
diff --git a/src/main.h b/src/main.h
index fd25f0bae6..9fd97d2126 100644
--- a/src/main.h
+++ b/src/main.h
@@ -108,8 +108,8 @@ 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;
+/** Default for -mempoolreplacement */
+static const bool DEFAULT_ENABLE_REPLACEMENT = true;
 
 /** Maximum number of headers to announce when relaying blocks with headers message.*/
 static const unsigned int MAX_BLOCKS_TO_ANNOUNCE = 8;
@@ -141,7 +141,7 @@ extern bool fCheckpointsEnabled;
 extern size_t nCoinCacheUsage;
 extern CFeeRate minRelayTxFee;
 extern bool fAlerts;
-extern bool fPermitReplacement;
+extern bool fEnableReplacement;
 
 /** Best header we've seen so far (used for getheaders queries' starting points). */
 extern CBlockIndex *pindexBestHeader;