Fix stateblock receive account field to be consistent with legacy blo…

…cks (nanocurrency#820)

* Fix stateblock receive account field to be consistent with legacy blocks

* Add account field to output of account_history RPC call

* Only look up account if it is not provided in account_history RPC call

rai/node/rpc.cpp

@@ -1800,7 +1800,7 @@ class history_visitor : public rai::block_visitor
 				{
 					tree.put ("type", "receive");
 				}
-				tree.put ("account", block_a.hashables.account.to_account ());
+				tree.put ("account", handler.node.ledger.account (transaction, block_a.hashables.link).to_account ());
 				tree.put ("amount", (balance - previous_balance).convert_to<std::string> ());
 			}
 		}
@@ -1815,6 +1815,7 @@ class history_visitor : public rai::block_visitor
 
 void rai::rpc_handler::account_history ()
 {
+	std::string account_text;
 	std::string count_text (request.get<std::string> ("count"));
 	bool output_raw (request.get_optional<bool> ("raw") == true);
 	auto error (false);
@@ -1824,14 +1825,18 @@ void rai::rpc_handler::account_history ()
 	if (head_str)
 	{
 		error = hash.decode_hex (*head_str);
-		if (error)
+		if (!error)
+		{
+			account_text = node.ledger.account (transaction, hash).to_account ();
+		}
+		else
 		{
 			error_response (response, "Invalid block hash");
 		}
 	}
 	else
 	{
-		std::string account_text (request.get<std::string> ("account"));
+		account_text = request.get<std::string> ("account");
 		rai::uint256_union account;
 		error = account.decode_account (account_text);
 		if (!error)
@@ -1856,6 +1861,7 @@ void rai::rpc_handler::account_history ()
 				boost::property_tree::ptree history;
 				if (!error)
 				{
+					response_l.put ("account", account_text);
 					auto block (node.store.block_get (transaction, hash));
 					while (block != nullptr && count > 0)
 					{