Add RPC block_hash action (#830)

rai/core_test/rpc.cpp

@@ -3328,6 +3328,30 @@ TEST (rpc, block_create_state_request_work)
 	}
 }
 
+TEST (rpc, block_hash)
+{
+	rai::system system (24000, 1);
+	rai::keypair key;
+	auto latest (system.nodes[0]->latest (rai::test_genesis_key.pub));
+	auto & node1 (*system.nodes[0]);
+	rai::send_block send (latest, key.pub, 100, rai::test_genesis_key.prv, rai::test_genesis_key.pub, node1.generate_work (latest));
+	rai::rpc rpc (system.service, node1, rai::rpc_config (true));
+	rpc.start ();
+	boost::property_tree::ptree request;
+	request.put ("action", "block_hash");
+	std::string json;
+	send.serialize_json (json);
+	request.put ("block", json);
+	test_response response (request, rpc, system.service);
+	while (response.status == 0)
+	{
+		system.poll ();
+	}
+	ASSERT_EQ (200, response.status);
+	std::string send_hash (response.json.get<std::string> ("hash"));
+	ASSERT_EQ (send.hash ().to_string (), send_hash);
+}
+
 TEST (rpc, wallet_lock)
 {
 	rai::system system (24000, 1);

rai/node/rpc.cpp

@@ -1390,6 +1390,27 @@ void rai::rpc_handler::block_create ()
 	}
 }
 
+void rai::rpc_handler::block_hash ()
+{
+	std::string block_text (request.get<std::string> ("block"));
+	boost::property_tree::ptree block_l;
+	std::stringstream block_stream (block_text);
+	boost::property_tree::read_json (block_stream, block_l);
+	block_l.put ("signature", "0");
+	block_l.put ("work", "0");
+	auto block (rai::deserialize_block_json (block_l));
+	if (block != nullptr)
+	{
+		boost::property_tree::ptree response_l;
+		response_l.put ("hash", block->hash ().to_string ());
+		response (response_l);
+	}
+	else
+	{
+		error_response (response, "Block is invalid");
+	}
+}
+
 void rai::rpc_handler::successors ()
 {
 	std::string block_text (request.get<std::string> ("block"));
@@ -4696,6 +4717,10 @@ void rai::rpc_handler::process_request ()
 		{
 			block_create ();
 		}
+		else if (action == "block_hash")
+		{
+			block_hash ();
+		}
 		else if (action == "successors")
 		{
 			successors ();

rai/node/rpc.hpp

@@ -140,6 +140,7 @@ class rpc_handler : public std::enable_shared_from_this<rai::rpc_handler>
 	void block_count ();
 	void block_count_type ();
 	void block_create ();
+	void block_hash ();
 	void bootstrap ();
 	void bootstrap_any ();
 	void chain ();