diff --git a/CMakeLists.txt b/CMakeLists.txt
index daacda9a0c5..777134b3b4c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -126,6 +126,11 @@ FIND_PACKAGE(Boost 1.67 REQUIRED COMPONENTS
     locale
     iostreams)
 
+# Some new stdlibc++s will #error on <experimental/string_view>; a problem for boost pre-1.69
+if( APPLE AND UNIX )
+   add_definitions(-DBOOST_ASIO_DISABLE_STD_EXPERIMENTAL_STRING_VIEW)
+endif()
+
 if( WIN32 )
 
     message( STATUS "Configuring EOSIO on WIN32")
diff --git a/Docker/README.md b/Docker/README.md
index fe8486e7dc5..06a1c6d7397 100644
--- a/Docker/README.md
+++ b/Docker/README.md
@@ -200,3 +200,4 @@ The `blocks` data are stored under `--data-dir` by default, and the wallet files
 
 Currently, the mongodb plugin is disabled in `config.ini` by default, you have to change it manually in `config.ini` or you can mount a `config.ini` file to `/opt/eosio/bin/data-dir/config.ini` in the docker-compose file.
 
+
diff --git a/README.md b/README.md
index 75e3c252bc5..fcb64fdbb2e 100644
--- a/README.md
+++ b/README.md
@@ -46,3 +46,4 @@ BOSCore bases on EOSIO, so you can also referer:
 [EOSIO Developer Portal](https://developers.eos.io).
 
 
+
diff --git a/libraries/chain/controller.cpp b/libraries/chain/controller.cpp
index b582e6ee40c..2a5581a1c20 100644
--- a/libraries/chain/controller.cpp
+++ b/libraries/chain/controller.cpp
@@ -430,14 +430,7 @@ struct controller_impl {
 
    void clear_all_undo() {
       // Rewind the database to the last irreversible block
-      db.with_write_lock([&] {
-         db.undo_all();
-         /*
-         FC_ASSERT(db.revision() == self.head_block_num(),
-                   "Chainbase revision does not match head block num",
-                   ("rev", db.revision())("head_block", self.head_block_num()));
-                   */
-      });
+      db.undo_all();
    }
 
    void add_contract_tables_to_snapshot( const snapshot_writer_ptr& snapshot ) const {
@@ -1149,6 +1142,9 @@ struct controller_impl {
       transaction_trace_ptr trace;
       try {
          auto start = fc::time_point::now();
+         const bool check_auth = !self.skip_auth_check() && !trx->implicit;
+         // call recover keys so that trx->sig_cpu_usage is set correctly
+         const flat_set<public_key_type>& recovered_keys = check_auth ? trx->recover_keys( chain_id ) : flat_set<public_key_type>();
          if( !explicit_billed_cpu_time ) {
             fc::microseconds already_consumed_time( EOS_PERCENT(trx->sig_cpu_usage.count(), conf.sig_cpu_bill_pct) );
 
@@ -1180,15 +1176,13 @@ struct controller_impl {
             }
             trx_context.delay = fc::seconds(trn.delay_sec);
 
-            if( !self.skip_auth_check() && !trx->implicit ) {
+            if( check_auth ) {
                authorization.check_authorization(
                        trn.actions,
-                       trx->recover_keys( chain_id ),
+                       recovered_keys,
                        {},
                        trx_context.delay,
-                       [](){}
-                       /*std::bind(&transaction_context::add_cpu_usage_and_check_time, &trx_context,
-                                 std::placeholders::_1)*/,
+                       [&trx_context](){ trx_context.checktime(); },
                        false
                );
             }
diff --git a/plugins/net_plugin/net_plugin.cpp b/plugins/net_plugin/net_plugin.cpp
index 889eefb9ed0..8161a7119cf 100644
--- a/plugins/net_plugin/net_plugin.cpp
+++ b/plugins/net_plugin/net_plugin.cpp
@@ -593,9 +593,6 @@ namespace eosio {
 
       const string peer_name();
 
-      void txn_send_pending(const vector<transaction_id_type>& ids);
-      void txn_send(const vector<transaction_id_type>& txn_lis);
-
       void blk_send_branch();
       void blk_send(const block_id_type& blkid);
       void stop_send();
@@ -742,6 +739,7 @@ namespace eosio {
       void rejected_block(const block_id_type& id);
 
       void recv_block(const connection_ptr& conn, const block_id_type& msg, uint32_t bnum);
+      void expire_blocks( uint32_t bnum );
       void recv_transaction(const connection_ptr& conn, const transaction_id_type& id);
       void recv_notice(const connection_ptr& conn, const notice_message& msg, bool generated);
 
@@ -848,27 +846,6 @@ namespace eosio {
       fc_dlog(logger, "canceling wait on ${p}", ("p",peer_name()));
       cancel_wait();
       if( read_delay_timer ) read_delay_timer->cancel();
-      pending_message_buffer.reset();
-   }
-
-   void connection::txn_send_pending(const vector<transaction_id_type>& ids) {
-      const std::set<transaction_id_type, sha256_less> known_ids(ids.cbegin(), ids.cend());
-      my_impl->expire_local_txns();
-      for(auto tx = my_impl->local_txns.begin(); tx != my_impl->local_txns.end(); ++tx ){
-         const bool found = known_ids.find( tx->id ) != known_ids.cend();
-         if( !found ) {
-            queue_write( tx->serialized_txn, true, []( boost::system::error_code ec, std::size_t ) {} );
-         }
-      }
-   }
-
-   void connection::txn_send(const vector<transaction_id_type>& ids) {
-      for(const auto& t : ids) {
-         auto tx = my_impl->local_txns.get<by_id>().find(t);
-         if( tx != my_impl->local_txns.end() ) {
-            queue_write( tx->serialized_txn, true, []( boost::system::error_code ec, std::size_t ) {} );
-         }
-      }
    }
 
    void connection::blk_send_branch() {
@@ -1697,11 +1674,23 @@ namespace eosio {
    }
 
    void dispatch_manager::rejected_block(const block_id_type& id) {
-      fc_dlog(logger,"not sending rejected transaction ${tid}",("tid",id));
+      fc_dlog( logger, "rejected block ${id}", ("id", id) );
       auto range = received_blocks.equal_range(id);
       received_blocks.erase(range.first, range.second);
    }
 
+   void dispatch_manager::expire_blocks( uint32_t lib_num ) {
+      for( auto i = received_blocks.begin(); i != received_blocks.end(); ) {
+         const block_id_type& blk_id = i->first;
+         uint32_t blk_num = block_header::num_from_id( blk_id );
+         if( blk_num <= lib_num ) {
+            i = received_blocks.erase( i );
+         } else {
+            ++i;
+         }
+      }
+   }
+
    void dispatch_manager::bcast_transaction(const transaction_metadata_ptr& ptrx) {
       std::set<connection_ptr> skips;
       const auto& id = ptrx->id;
@@ -1926,6 +1915,7 @@ namespace eosio {
       auto current_endpoint = *endpoint_itr;
       ++endpoint_itr;
       c->connecting = true;
+      c->pending_message_buffer.reset();
       connection_wptr weak_conn = c;
       c->socket->async_connect( current_endpoint, [weak_conn, endpoint_itr, this] ( const boost::system::error_code& err ) {
             auto c = weak_conn.lock();
@@ -2129,7 +2119,7 @@ namespace eosio {
             conn->pending_message_buffer.get_buffer_sequence_for_boost_async_read(), completion_handler,
             [this,weak_conn]( boost::system::error_code ec, std::size_t bytes_transferred ) {
                auto conn = weak_conn.lock();
-               if (!conn) {
+               if (!conn || !conn->socket || !conn->socket->is_open()) {
                   return;
                }
 
@@ -2490,17 +2480,6 @@ namespace eosio {
          break;
       }
       case catch_up : {
-         if( msg.known_trx.pending > 0) {
-            // plan to get all except what we already know about.
-            req.req_trx.mode = catch_up;
-            send_req = true;
-            size_t known_sum = local_txns.size();
-            if( known_sum ) {
-               for( const auto& t : local_txns.get<by_id>() ) {
-                  req.req_trx.ids.push_back( t.id );
-               }
-            }
-         }
          break;
       }
       case normal: {
@@ -2558,14 +2537,17 @@ namespace eosio {
 
       switch (msg.req_trx.mode) {
       case catch_up :
-         c->txn_send_pending(msg.req_trx.ids);
-         break;
-      case normal :
-         c->txn_send(msg.req_trx.ids);
          break;
       case none :
          if(msg.req_blocks.mode == none)
             c->stop_send();
+         // no break
+      case normal :
+         if( !msg.req_trx.ids.empty() ) {
+            elog( "Invalid request_message, req_trx.ids.size ${s}", ("s", msg.req_trx.ids.size()) );
+            close(c);
+            return;
+         }
          break;
       default:;
       }
@@ -2693,6 +2675,7 @@ namespace eosio {
       }
       else {
          sync_master->rejected_block(c, blk_num);
+         dispatcher->rejected_block( blk_id );
       }
    }
 
@@ -2754,6 +2737,7 @@ namespace eosio {
 
       controller& cc = chain_plug->chain();
       uint32_t lib = cc.last_irreversible_block_num();
+      dispatcher->expire_blocks( lib );
       for ( auto &c : connections ) {
          auto &stale_txn = c->trx_state.get<by_block_num>();
          stale_txn.erase( stale_txn.lower_bound(1), stale_txn.upper_bound(lib) );
diff --git a/programs/cleos/main.cpp b/programs/cleos/main.cpp
index e1047613e24..d6768184cc2 100644
--- a/programs/cleos/main.cpp
+++ b/programs/cleos/main.cpp
@@ -438,9 +438,11 @@ bytes json_or_file_to_bin( const account_name& account, const action_name& actio
 
 void print_action_tree( const fc::variant& action ) {
    print_action( action );
-   const auto& inline_traces = action["inline_traces"].get_array();
-   for( const auto& t : inline_traces ) {
-      print_action_tree( t );
+   if( action.get_object().contains( "inline_traces" ) ) {
+      const auto& inline_traces = action["inline_traces"].get_array();
+      for( const auto& t : inline_traces ) {
+         print_action_tree( t );
+      }
    }
 }
 
@@ -448,12 +450,13 @@ void print_result( const fc::variant& result ) { try {
       if (result.is_object() && result.get_object().contains("processed")) {
          const auto& processed = result["processed"];
          const auto& transaction_id = processed["id"].as_string();
-         string status = processed["receipt"].is_object() ? processed["receipt"]["status"].as_string() : "failed";
+         string status = "failed";
          int64_t net = -1;
          int64_t cpu = -1;
          if( processed.get_object().contains( "receipt" )) {
             const auto& receipt = processed["receipt"];
             if( receipt.is_object()) {
+               status = receipt["status"].as_string();
                net = receipt["net_usage_words"].as_int64() * 8;
                cpu = receipt["cpu_usage_us"].as_int64();
             }