tests: Add fuzzing harness for various CTxIn related functions

1 files changed, 33 insertions, 0 deletions

diff --git a/src/test/fuzz/tx_in.cpp b/src/test/fuzz/tx_in.cpp
new file mode 100644
index 0000000000..8e116537d1
--- /dev/null
+++ b/src/test/fuzz/tx_in.cpp
@@ -0,0 +1,33 @@
+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <consensus/validation.h>
+#include <core_memusage.h>
+#include <policy/policy.h>
+#include <primitives/transaction.h>
+#include <streams.h>
+#include <test/fuzz/fuzz.h>
+#include <version.h>
+
+#include <cassert>
+
+void test_one_input(const std::vector<uint8_t>& buffer)
+{
+    CDataStream ds(buffer, SER_NETWORK, INIT_PROTO_VERSION);
+    CTxIn tx_in;
+    try {
+        int version;
+        ds >> version;
+        ds.SetVersion(version);
+        ds >> tx_in;
+    } catch (const std::ios_base::failure&) {
+        return;
+    }
+
+    (void)GetTransactionInputWeight(tx_in);
+    (void)GetVirtualTransactionInputSize(tx_in);
+    (void)RecursiveDynamicUsage(tx_in);
+
+    (void)tx_in.ToString();
+}