From 2639c4f2ff345b1142cfb8d822c05867b384c410 Mon Sep 17 00:00:00 2001
From: selsta <selsta@sent.at>
Date: Sat, 20 Aug 2022 00:40:46 +0200
Subject: [PATCH] rpc: skip bootstrap nodes that are lower than last checkpoint

---
 src/cryptonote_core/blockchain.h        | 7 +++++++
 src/cryptonote_core/cryptonote_core.cpp | 4 ++++
 src/cryptonote_core/cryptonote_core.h   | 7 +++++++
 src/rpc/core_rpc_server.cpp             | 6 ++++++
 4 files changed, 24 insertions(+)

diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h
index 7a94f6358..355d0de1a 100644
--- a/src/cryptonote_core/blockchain.h
+++ b/src/cryptonote_core/blockchain.h
@@ -158,6 +158,13 @@ namespace cryptonote
      */
     bool deinit();
 
+    /**
+     * @brief get a set of blockchain checkpoint hashes
+     *
+     * @return set of blockchain checkpoint hashes
+     */
+    const checkpoints& get_checkpoints() const { return m_checkpoints; }
+
     /**
      * @brief assign a set of blockchain checkpoint hashes
      *
diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp
index a78f5d673..96e88e6fd 100644
--- a/src/cryptonote_core/cryptonote_core.cpp
+++ b/src/cryptonote_core/cryptonote_core.cpp
@@ -252,6 +252,10 @@ namespace cryptonote
       m_pprotocol = &m_protocol_stub;
   }
   //-----------------------------------------------------------------------------------
+  const checkpoints& core::get_checkpoints() const
+  {
+    return m_blockchain_storage.get_checkpoints();
+  }
   void core::set_checkpoints(checkpoints&& chk_pts)
   {
     m_blockchain_storage.set_checkpoints(std::move(chk_pts));
diff --git a/src/cryptonote_core/cryptonote_core.h b/src/cryptonote_core/cryptonote_core.h
index 0b36730b6..98572df2b 100644
--- a/src/cryptonote_core/cryptonote_core.h
+++ b/src/cryptonote_core/cryptonote_core.h
@@ -436,6 +436,13 @@ namespace cryptonote
       */
      void set_cryptonote_protocol(i_cryptonote_protocol* pprotocol);
 
+     /**
+      * @copydoc Blockchain::get_checkpoints
+      *
+      * @note see Blockchain::get_checkpoints()
+      */
+     const checkpoints& get_checkpoints() const;
+
      /**
       * @copydoc Blockchain::set_checkpoints
       *
diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index 5304333ff..8d13b7634 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -2290,6 +2290,12 @@ namespace cryptonote
         return m_bootstrap_daemon->handle_result(false, {});
       }
 
+      if (bootstrap_daemon_height < m_core.get_checkpoints().get_max_height())
+      {
+        MINFO("Bootstrap daemon height is lower than the latest checkpoint");
+        return m_bootstrap_daemon->handle_result(false, {});
+      }
+
       if (!m_p2p.get_payload_object().no_sync())
       {
         uint64_t top_height = m_core.get_current_blockchain_height();