Split out common metadata validation code

1 files changed, 80 insertions, 0 deletions

diff --git a/test/Metadata.cpp b/test/Metadata.cpp
new file mode 100644
index 00000000..03f905b1
--- /dev/null
+++ b/test/Metadata.cpp
@@ -0,0 +1,80 @@
+/*
+	This file is part of solidity.
+
+	solidity is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	solidity is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with solidity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @date 2017
+ * Metadata processing helpers.
+ */
+
+#include <string>
+#include <iostream>
+#include <regex>
+#include <libdevcore/JSON.h>
+
+using namespace std;
+
+namespace dev
+{
+namespace test
+{
+
+string bytecodeSansMetadata(string const& _bytecode)
+{
+	/// The metadata hash takes up 43 bytes (or 86 characters in hex)
+	/// /a165627a7a72305820([0-9a-f]{64})0029$/
+
+	if (_bytecode.size() < 88)
+		return _bytecode;
+
+	if (_bytecode.substr(_bytecode.size() - 4, 4) != "0029")
+		return _bytecode;
+
+	if (_bytecode.substr(_bytecode.size() - 86, 18) != "a165627a7a72305820")
+		return _bytecode;
+
+	return _bytecode.substr(0, _bytecode.size() - 86);
+}
+
+bool isValidMetadata(string const& _metadata)
+{
+	Json::Value metadata;
+	if (!Json::Reader().parse(_metadata, metadata, false))
+		return false;
+
+	if (
+		!metadata.isObject() ||
+		!metadata.isMember("version") ||
+		!metadata.isMember("language") ||
+		!metadata.isMember("compiler") ||
+		!metadata.isMember("settings") ||
+		!metadata.isMember("sources") ||
+		!metadata.isMember("output")
+	)
+		return false;
+
+	if (!metadata["version"].isNumeric() || metadata["version"] != 1)
+		return false;
+
+	if (!metadata["language"].isString() || metadata["language"].asString() != "Solidity")
+		return false;
+
+	/// @TODO add more strict checks
+
+	return true;
+}
+
+}
+} // end namespaces