From b8e8717fe6b98144f04b8d068cd59c92354ef3c8 Mon Sep 17 00:00:00 2001
From: nathan <nathan@pacificao.com>
Date: Fri, 8 May 2026 08:33:06 -0700
Subject: [PATCH] Restore Quark proof-of-work mining

---
 contrib/build-linux.sh   | 7 ++++++-
 src/primitives/block.cpp | 5 +----
 src/rpc/mining.cpp       | 1 +
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/contrib/build-linux.sh b/contrib/build-linux.sh
index 360f69a8..5e86277a 100755
--- a/contrib/build-linux.sh
+++ b/contrib/build-linux.sh
@@ -4,6 +4,7 @@ set -euo pipefail
 ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 JOBS="${JOBS:-1}"
 MODE="${MODE:-daemon}"
+DAEMON_TARGETS="${DAEMON_TARGETS:-agrariand agrarian-cli agrarian-tx}"
 HOST="${HOST:-$("$ROOT/depends/config.guess")}"
 PREFIX="$ROOT/depends/$HOST"
 BASE_CONFIG="$PREFIX/share/config.site"
@@ -65,5 +66,9 @@ case "$MODE" in
     ;;
 esac
 
-make -j"$JOBS"
+if [[ "$MODE" == "daemon" ]]; then
+  make -j"$JOBS" $DAEMON_TARGETS
+else
+  make -j"$JOBS"
+fi
 echo "Linux $MODE build complete."
diff --git a/src/primitives/block.cpp b/src/primitives/block.cpp
index 9786e906..752a4c71 100644
--- a/src/primitives/block.cpp
+++ b/src/primitives/block.cpp
@@ -15,10 +15,7 @@
 
 uint256 CBlockHeader::GetHash() const
 {
-    if(nVersion < 4)
-        return HashQuark(BEGIN(nVersion), END(nNonce));
-
-    return Hash(BEGIN(nVersion), END(nAccumulatorCheckpoint));
+    return HashQuark(BEGIN(nVersion), END(nNonce));
 }
 
 uint256 CBlock::BuildMerkleTree(bool* fMutated) const
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index 69c3b90e..9ac45837 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -605,6 +605,7 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
     result.push_back(Pair("curtime", pblock->GetBlockTime()));
     result.push_back(Pair("bits", strprintf("%08x", pblock->nBits)));
     result.push_back(Pair("height", (int64_t)(pindexPrev->nHeight + 1)));
+    result.push_back(Pair("acc_checkpoint", pblock->nAccumulatorCheckpoint.GetHex()));
     result.push_back(Pair("votes", aVotes));