Merge pull request #5525

0605406 daemon: sort alt chains by height (moneromooo-monero)
4228ee0  daemon: add optional arguments to alt_chain_info (moneromooo-monero)
880ebfd daemon: add more chain specific info in alt_chain_info (moneromooo-monero)

3 files changed, 92 insertions, 7 deletions

diff --git a/src/daemon/command_parser_executor.cpp b/src/daemon/command_parser_executor.cpp
index 778d7b4d8..924447701 100644
--- a/src/daemon/command_parser_executor.cpp
+++ b/src/daemon/command_parser_executor.cpp
@@ -674,11 +674,38 @@ bool t_command_parser_executor::alt_chain_info(const std::vector<std::string>& a
 {
   if(args.size() > 1)
   {
-    std::cout << "usage: alt_chain_info [block_hash]" << std::endl;
+    std::cout << "usage: alt_chain_info [block_hash|>N|-N]" << std::endl;
     return false;
   }
 
-  return m_executor.alt_chain_info(args.size() == 1 ? args[0] : "");
+  std::string tip;
+  size_t above = 0;
+  uint64_t last_blocks = 0;
+  if (args.size() == 1)
+  {
+    if (args[0].size() > 0 && args[0][0] == '>')
+    {
+      if (!epee::string_tools::get_xtype_from_string(above, args[0].c_str() + 1))
+      {
+        std::cout << "invalid above parameter" << std::endl;
+        return false;
+      }
+    }
+    else if (args[0].size() > 0 && args[0][0] == '-')
+    {
+      if (!epee::string_tools::get_xtype_from_string(last_blocks, args[0].c_str() + 1))
+      {
+        std::cout << "invalid last_blocks parameter" << std::endl;
+        return false;
+      }
+    }
+    else
+    {
+      tip = args[0];
+    }
+  }
+
+  return m_executor.alt_chain_info(tip, above, last_blocks);
 }
 
 bool t_command_parser_executor::print_blockchain_dynamic_stats(const std::vector<std::string>& args)
diff --git a/src/daemon/rpc_command_executor.cpp b/src/daemon/rpc_command_executor.cpp
index ca80e8e98..309e5c8dd 100644
--- a/src/daemon/rpc_command_executor.cpp
+++ b/src/daemon/rpc_command_executor.cpp
@@ -1818,7 +1818,7 @@ bool t_rpc_command_executor::print_coinbase_tx_sum(uint64_t height, uint64_t cou
   return true;
 }
 
-bool t_rpc_command_executor::alt_chain_info(const std::string &tip)
+bool t_rpc_command_executor::alt_chain_info(const std::string &tip, size_t above, uint64_t last_blocks)
 {
   cryptonote::COMMAND_RPC_GET_INFO::request ireq;
   cryptonote::COMMAND_RPC_GET_INFO::response ires;
@@ -1855,16 +1855,31 @@ bool t_rpc_command_executor::alt_chain_info(const std::string &tip)
 
   if (tip.empty())
   {
-    tools::msg_writer() << boost::lexical_cast<std::string>(res.chains.size()) << " alternate chains found:";
-    for (const auto &chain: res.chains)
+    auto chains = res.chains;
+    std::sort(chains.begin(), chains.end(), [](const cryptonote::COMMAND_RPC_GET_ALTERNATE_CHAINS::chain_info &info0, cryptonote::COMMAND_RPC_GET_ALTERNATE_CHAINS::chain_info &info1){ return info0.height < info1.height; });
+    std::vector<size_t> display;
+    for (size_t i = 0; i < chains.size(); ++i)
     {
-      uint64_t start_height = (chain.height - chain.length + 1);
+      const auto &chain = chains[i];
+      if (chain.length <= above)
+        continue;
+      const uint64_t start_height = (chain.height - chain.length + 1);
+      if (last_blocks > 0 && ires.height - 1 - start_height >= last_blocks)
+        continue;
+      display.push_back(i);
+    }
+    tools::msg_writer() << boost::lexical_cast<std::string>(display.size()) << " alternate chains found:";
+    for (const size_t idx: display)
+    {
+      const auto &chain = chains[idx];
+      const uint64_t start_height = (chain.height - chain.length + 1);
       tools::msg_writer() << chain.length << " blocks long, from height " << start_height << " (" << (ires.height - start_height - 1)
           << " deep), diff " << chain.difficulty << ": " << chain.block_hash;
     }
   }
   else
   {
+    const uint64_t now = time(NULL);
     const auto i = std::find_if(res.chains.begin(), res.chains.end(), [&tip](cryptonote::COMMAND_RPC_GET_ALTERNATE_CHAINS::chain_info &info){ return info.block_hash == tip; });
     if (i != res.chains.end())
     {
@@ -1876,6 +1891,49 @@ bool t_rpc_command_executor::alt_chain_info(const std::string &tip)
       for (const std::string &block_id: chain.block_hashes)
         tools::msg_writer() << "  " << block_id;
       tools::msg_writer() << "Chain parent on main chain: " << chain.main_chain_parent_block;
+      cryptonote::COMMAND_RPC_GET_BLOCK_HEADER_BY_HASH::request bhreq;
+      cryptonote::COMMAND_RPC_GET_BLOCK_HEADER_BY_HASH::response bhres;
+      bhreq.hashes = chain.block_hashes;
+      bhreq.hashes.push_back(chain.main_chain_parent_block);
+      bhreq.fill_pow_hash = false;
+      if (m_is_rpc)
+      {
+        if (!m_rpc_client->json_rpc_request(bhreq, bhres, "getblockheaderbyhash", fail_message.c_str()))
+        {
+          return true;
+        }
+      }
+      else
+      {
+        if (!m_rpc_server->on_get_block_header_by_hash(bhreq, bhres, error_resp))
+        {
+          tools::fail_msg_writer() << make_error(fail_message, res.status);
+          return true;
+        }
+      }
+      if (bhres.block_headers.size() != chain.length + 1)
+      {
+        tools::fail_msg_writer() << "Failed to get block header info for alt chain";
+        return true;
+      }
+      uint64_t t0 = bhres.block_headers.front().timestamp, t1 = t0;
+      for (const cryptonote::block_header_response &block_header: bhres.block_headers)
+      {
+        t0 = std::min<uint64_t>(t0, block_header.timestamp);
+        t1 = std::max<uint64_t>(t1, block_header.timestamp);
+      }
+      const uint64_t dt = t1 - t0;
+      const uint64_t age = std::max(dt, t0 < now ? now - t0 : 0);
+      tools::msg_writer() << "Age: " << tools::get_human_readable_timespan(age);
+      if (chain.length > 1)
+      {
+        tools::msg_writer() << "Time span: " << tools::get_human_readable_timespan(dt);
+        cryptonote::difficulty_type start_difficulty = bhres.block_headers.back().difficulty;
+        if (start_difficulty > 0)
+          tools::msg_writer() << "Approximated " << 100.f * DIFFICULTY_TARGET_V2 * chain.length / dt << "% of network hash rate";
+        else
+          tools::fail_msg_writer() << "Bad cmumulative difficulty reported by dameon";
+      }
     }
     else
       tools::fail_msg_writer() << "Block hash " << tip << " is not the tip of any known alternate chain";
diff --git a/src/daemon/rpc_command_executor.h b/src/daemon/rpc_command_executor.h
index 4622609ae..f3ed48319 100644
--- a/src/daemon/rpc_command_executor.h
+++ b/src/daemon/rpc_command_executor.h
@@ -145,7 +145,7 @@ public:
 
   bool print_coinbase_tx_sum(uint64_t height, uint64_t count);
 
-  bool alt_chain_info(const std::string &tip);
+  bool alt_chain_info(const std::string &tip, size_t above, uint64_t last_blocks);
 
   bool print_blockchain_dynamic_stats(uint64_t nblocks);