From b49f48962b611734aa258113270d29fa3ccdec4e Mon Sep 17 00:00:00 2001
From: Alexis Enston <xn@outlook.com>
Date: Mon, 12 Oct 2020 14:08:35 +0100
Subject: [PATCH] fix next_seed_height regression in getblocktemplate rpc

---
 src/rpc/core_rpc_server.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index a50c70418..33c8a7055 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -1661,6 +1661,13 @@ namespace cryptonote
       return false;
     }
 
+    uint64_t next_height;
+    crypto::rx_seedheights(height, &seed_height, &next_height);
+    if (next_height != seed_height)
+      next_seed_hash = m_core.get_block_id_by_height(next_height);
+    else
+      next_seed_hash = seed_hash;
+
     if (extra_nonce.empty())
     {
       reserved_offset = 0;