simplewallet: new "fee" command to display fee information

including expected transaction backlog at different priorities

2 files changed, 67 insertions, 3 deletions

diff --git a/src/simplewallet/simplewallet.cpp b/src/simplewallet/simplewallet.cpp
index 479adcafc..ecdae2891 100644
--- a/src/simplewallet/simplewallet.cpp
+++ b/src/simplewallet/simplewallet.cpp
@@ -391,6 +391,61 @@ bool simple_wallet::payment_id(const std::vector<std::string> &args/* = std::vec
   return true;
 }
 
+bool simple_wallet::print_fee_info(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
+{
+  if (!try_connect_to_daemon())
+  {
+    fail_msg_writer() << tr("Cannot connect to daemon");
+    return true;
+  }
+  const uint64_t per_kb_fee = m_wallet->get_per_kb_fee();
+  const uint64_t typical_size_kb = 13;
+  message_writer() << (boost::format(tr("Current fee is %s monero per kB")) % print_money(per_kb_fee)).str();
+
+  std::vector<uint64_t> fees;
+  for (uint32_t priority = 1; priority <= 4; ++priority)
+  {
+    uint64_t mult = m_wallet->get_fee_multiplier(priority);
+    fees.push_back(per_kb_fee * typical_size_kb * mult);
+  }
+  std::vector<std::pair<uint64_t, uint64_t>> blocks;
+  try
+  {
+    uint64_t base_size = typical_size_kb * 1024;
+    blocks = m_wallet->estimate_backlog(base_size, base_size + 1023, fees);
+  }
+  catch (const std::exception &e)
+  {
+    fail_msg_writer() << tr("Error: failed to estimate backlog array size: ") << e.what();
+    return true;
+  }
+  if (blocks.size() != 4)
+  {
+    fail_msg_writer() << tr("Error: bad estimated backlog array size");
+    return true;
+  }
+
+  for (uint32_t priority = 1; priority <= 4; ++priority)
+  {
+    uint64_t nblocks_low = blocks[priority - 1].first;
+    uint64_t nblocks_high = blocks[priority - 1].second;
+    if (nblocks_low > 0)
+    {
+      std::string msg;
+      if (priority == m_wallet->get_default_priority() || (m_wallet->get_default_priority() == 0 && priority == 2))
+        msg = tr(" (current)");
+      uint64_t minutes_low = nblocks_low * DIFFICULTY_TARGET_V2 / 60, minutes_high = nblocks_high * DIFFICULTY_TARGET_V2 / 60;
+      if (nblocks_high == nblocks_low)
+        message_writer() << (boost::format(tr("%u block (%u minutes) backlog at priority %u%s")) % nblocks_low % minutes_low % priority % msg).str();
+      else
+        message_writer() << (boost::format(tr("%u to %u block (%u to %u minutes) backlog at priority %u")) % nblocks_low % nblocks_high % minutes_low % minutes_high % priority).str();
+    }
+    else
+      message_writer() << tr("No backlog at priority ") << priority;
+  }
+  return true;
+}
+
 bool simple_wallet::set_always_confirm_transfers(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
 {
   const auto pwd_container = get_and_verify_password();
@@ -722,6 +777,7 @@ simple_wallet::simple_wallet()
   m_cmd_binder.set_handler("show_transfer", boost::bind(&simple_wallet::show_transfer, this, _1), tr("Show information about a transfer to/from this address"));
   m_cmd_binder.set_handler("password", boost::bind(&simple_wallet::change_password, this, _1), tr("Change wallet password"));
   m_cmd_binder.set_handler("payment_id", boost::bind(&simple_wallet::payment_id, this, _1), tr("Generate a new random full size payment id - these will be unencrypted on the blockchain, see integrated_address for encrypted short payment ids"));
+  m_cmd_binder.set_handler("fee", boost::bind(&simple_wallet::print_fee_info, this, _1), tr("Print information about fee and current transaction backlog"));
   m_cmd_binder.set_handler("help", boost::bind(&simple_wallet::help, this, _1), tr("Show this help"));
 }
 //----------------------------------------------------------------------------------------------------
@@ -2461,9 +2517,16 @@ bool simple_wallet::transfer_main(int transfer_type, const std::vector<std::stri
       }
       try
       {
-        uint64_t nblocks = m_wallet->estimate_backlog(size, fee);
-        if (nblocks > 0)
-          prompt << (boost::format(tr("There is currently a %u block backlog at that fee level. Is this okay?  (Y/Yes/N/No)")) % nblocks).str();
+        std::vector<std::pair<uint64_t, uint64_t>> nblocks = m_wallet->estimate_backlog(size, size, {fee});
+        if (nblocks.size() != 1)
+        {
+          prompt << "Internal error checking for backlog. " << tr("Is this okay anyway?  (Y/Yes/N/No): ");
+        }
+        else
+        {
+          if (nblocks[0].first > 0)
+            prompt << (boost::format(tr("There is currently a %u block backlog at that fee level. Is this okay?  (Y/Yes/N/No)")) % nblocks[0].first).str();
+        }
       }
       catch (const std::exception &e)
       {
diff --git a/src/simplewallet/simplewallet.h b/src/simplewallet/simplewallet.h
index eac4cbc99..079fae9f5 100644
--- a/src/simplewallet/simplewallet.h
+++ b/src/simplewallet/simplewallet.h
@@ -175,6 +175,7 @@ namespace cryptonote
     bool show_transfer(const std::vector<std::string> &args);
     bool change_password(const std::vector<std::string>& args);
     bool payment_id(const std::vector<std::string> &args);
+    bool print_fee_info(const std::vector<std::string> &args);
 
     uint64_t get_daemon_blockchain_height(std::string& err);
     bool try_connect_to_daemon(bool silent = false, uint32_t* version = nullptr);