From bb88fdfcdd2e919486892887a74cac203245d31f Mon Sep 17 00:00:00 2001
From: Crypto City <cryptocity@example.com>
Date: Sun, 17 Nov 2019 21:12:46 +0000
Subject: [PATCH] wallet2: add on_reorg callback

---
 src/wallet/wallet2.cpp | 5 ++++-
 src/wallet/wallet2.h   | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 0a1d9d074..04e824bf2 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -3851,7 +3851,7 @@ void wallet2::detach_blockchain(uint64_t height, std::map<std::pair<uint64_t, ui
   transfers_detached = std::distance(it, m_transfers.end());
   m_transfers.erase(it, m_transfers.end());
 
-  size_t blocks_detached = m_blockchain.size() - height;
+  const uint64_t blocks_detached = m_blockchain.size() - height;
   m_blockchain.crop(height);
 
   for (auto it = m_payments.begin(); it != m_payments.end(); )
@@ -3870,6 +3870,9 @@ void wallet2::detach_blockchain(uint64_t height, std::map<std::pair<uint64_t, ui
       ++it;
   }
 
+  if (m_callback)
+    m_callback->on_reorg(height, blocks_detached, transfers_detached);
+
   LOG_PRINT_L0("Detached blockchain on height " << height << ", transfers detached " << transfers_detached << ", blocks detached " << blocks_detached);
 }
 //----------------------------------------------------------------------------------------------------
diff --git a/src/wallet/wallet2.h b/src/wallet/wallet2.h
index 70d03b339..c4a2879a6 100644
--- a/src/wallet/wallet2.h
+++ b/src/wallet/wallet2.h
@@ -138,6 +138,7 @@ private:
   public:
     // Full wallet callbacks
     virtual void on_new_block(uint64_t height, const cryptonote::block& block) {}
+    virtual void on_reorg(uint64_t height, uint64_t blocks_detached, size_t transfers_detached) {}
     virtual void on_money_received(uint64_t height, const crypto::hash &txid, const cryptonote::transaction& tx, uint64_t amount, uint64_t burnt, const cryptonote::subaddress_index& subaddr_index, bool is_change, uint64_t unlock_time) {}
     virtual void on_unconfirmed_money_received(uint64_t height, const crypto::hash &txid, const cryptonote::transaction& tx, uint64_t amount, const cryptonote::subaddress_index& subaddr_index) {}
     virtual void on_money_spent(uint64_t height, const crypto::hash &txid, const cryptonote::transaction& in_tx, uint64_t amount, const cryptonote::transaction& spend_tx, const cryptonote::subaddress_index& subaddr_index) {}