From aa523c7fe050e8f5e9caaa45554bd18b010e714a Mon Sep 17 00:00:00 2001
From: SergiySW <sergiysw@gmail.com>
Date: Tue, 18 Jul 2017 10:50:02 +0300
Subject: [PATCH] RPC pending_exists

---
 rai/node/rpc.cpp | 33 +++++++++++++++++++++++++++++++++
 rai/node/rpc.hpp |  1 +
 2 files changed, 34 insertions(+)

diff --git a/rai/node/rpc.cpp b/rai/node/rpc.cpp
index 57fc5289..773031f5 100755
--- a/rai/node/rpc.cpp
+++ b/rai/node/rpc.cpp
@@ -1392,6 +1392,35 @@ void rai::rpc_handler::pending ()
 	}
 }
 
+void rai::rpc_handler::pending_exists ()
+{
+	std::string hash_text (request.get <std::string> ("hash"));
+	rai::uint256_union hash;
+	auto error (hash.decode_hex (hash_text));
+	if (!error)
+	{
+		rai::transaction transaction (node.store.environment, nullptr, false);
+		auto block (node.store.block_get (transaction, hash));
+		if (block != nullptr)
+		{
+			auto block_l (static_cast <rai::send_block *> (block.release ()));
+			auto account (block_l->hashables.destination);
+			boost::property_tree::ptree response_l;
+			auto exists (node.store.pending_exists (transaction, rai::pending_key (account, hash)));
+			response_l.put ("exists", exists ? "1" : "0");
+			response (response_l);
+		}
+		else
+		{
+			error_response (response, "Block not found");
+		}
+	}
+	else
+	{
+		error_response (response, "Bad hash number");
+	}
+}
+
 void rai::rpc_handler::pending_threshold ()
 {
 	std::string account_text (request.get <std::string> ("account"));
@@ -2872,6 +2901,10 @@ void rai::rpc_handler::process_request ()
 		{
 			pending ();
 		}
+		else if (action == "pending_exists")
+		{
+			pending_exists ();
+		}
 		else if (action == "pending_threshold")
 		{
 			pending_threshold ();
diff --git a/rai/node/rpc.hpp b/rai/node/rpc.hpp
index 8f7ee457..6f0baa98 100644
--- a/rai/node/rpc.hpp
+++ b/rai/node/rpc.hpp
@@ -133,6 +133,7 @@ public:
 	void payment_wait ();
 	void peers ();
 	void pending ();
+	void pending_exists ();
 	void pending_threshold ();
 	void process ();
 	void rai_to_raw ();