From 905f744baf31944a5ffcba00ed2e9ccfeac85520 Mon Sep 17 00:00:00 2001
From: Brannon King <countprimes@gmail.com>
Date: Sun, 19 Apr 2020 10:34:43 -0600
Subject: [PATCH] fixed missing flags in getblocktemplate

---
 configure.ac       |  2 +-
 src/rpc/mining.cpp | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 1c0fdde62..aff8f3fa3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@ AC_PREREQ([2.60])
 define(_CLIENT_VERSION_MAJOR, 0)
 define(_CLIENT_VERSION_MINOR, 19)
 define(_CLIENT_VERSION_REVISION, 1)
-define(_CLIENT_VERSION_BUILD, 1)
+define(_CLIENT_VERSION_BUILD, 2)
 define(_CLIENT_VERSION_RC, 0)
 define(_CLIENT_VERSION_IS_RELEASE, true)
 define(_COPYRIGHT_YEAR, 2020)
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index eb94a1fd8..300276d2e 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -369,6 +369,7 @@ static UniValue getblocktemplate(const JSONRPCRequest& request)
     UniValue lpval = NullUniValue;
     std::set<std::string> setClientRules;
     int64_t nMaxVersionPreVB = -1;
+    UniValue aMutable(UniValue::VARR);
     if (!request.params[0].isNull())
     {
         const UniValue& oparam = request.params[0].get_obj();
@@ -383,6 +384,13 @@ static UniValue getblocktemplate(const JSONRPCRequest& request)
             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid mode");
         lpval = find_value(oparam, "longpollid");
 
+        const UniValue& capval = find_value(oparam, "capabilities");
+        if (capval.isArray()) {
+            for (std::size_t i = 0; i < capval.size(); ++i)
+                if (capval[i].get_str().rfind("coinbase/", 0) == 0) // we don't care what they do to the coinbase
+                    aMutable.push_back(capval[i]);
+        }
+
         if (strMode == "proposal")
         {
             const UniValue& dataval = find_value(oparam, "data");
@@ -573,7 +581,6 @@ static UniValue getblocktemplate(const JSONRPCRequest& request)
 
     arith_uint256 hashTarget = arith_uint256().SetCompact(pblock->nBits);
 
-    UniValue aMutable(UniValue::VARR);
     aMutable.push_back("time");
     aMutable.push_back("transactions");
     aMutable.push_back("prevblock");
@@ -623,6 +630,10 @@ static UniValue getblocktemplate(const JSONRPCRequest& request)
             }
         }
     }
+    if (pindexPrev->nHeight + 1 >= consensusParams.CSVHeight)
+        aRules.push_back("csv");
+    if (pindexPrev->nHeight + 1 >= consensusParams.SegwitHeight)
+        aRules.push_back("segwit");
     result.pushKV("version", pblock->nVersion);
     result.pushKV("rules", aRules);
     result.pushKV("vbavailable", vbavailable);