Note values should be little-endian byte order.

src/zcash/util.h

@@ -0,0 +1,9 @@
+#ifndef __ZCASH_UTIL_H
+#define __ZCASH_UTIL_H
+
+#include <vector>
+#include <cstdint>
+
+std::vector<unsigned char> convertIntToVectorLE(const uint64_t val_int);
+
+#endif // __ZCASH_UTIL_H