From 66fd77982d64aa2af138c2a3fcf53aebae0e847f Mon Sep 17 00:00:00 2001
From: Necokeine <necokeine@gmail.com>
Date: Mon, 17 Dec 2018 12:19:54 +0800
Subject: [PATCH] Return 400 on get_block with uonexist block number. For issue
 6374

---
 plugins/http_plugin/http_plugin.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/plugins/http_plugin/http_plugin.cpp b/plugins/http_plugin/http_plugin.cpp
index d9be006bb45..6226cec8fd0 100644
--- a/plugins/http_plugin/http_plugin.cpp
+++ b/plugins/http_plugin/http_plugin.cpp
@@ -561,6 +561,9 @@ namespace eosio {
       try {
          try {
             throw;
+         } catch (chain::unknown_block_exception& e) {
+            error_results results{400, "Unknown Block", error_results::error_info(e, verbose_http_errors)};
+            cb( 400, fc::json::to_string( results ));
          } catch (chain::unsatisfied_authorization& e) {
             error_results results{401, "UnAuthorized", error_results::error_info(e, verbose_http_errors)};
             cb( 401, fc::json::to_string( results ));