Change ciphertext length to match protocol spec, and refactor the use of constants.

src/zcash/Zcash.h

@@ -0,0 +1,18 @@
+#ifndef _ZCCONSTANTS_H_
+#define _ZCCONSTANTS_H_
+
+#define ZC_NUM_JS_INPUTS 2
+#define ZC_NUM_JS_OUTPUTS 2
+#define INCREMENTAL_MERKLE_TREE_DEPTH 20
+#define INCREMENTAL_MERKLE_TREE_DEPTH_TESTING 4
+
+// TODO: these constants should be 'ZC'
+// for consistency, but I didn't want to
+// interfere with the old constants
+#define ZCASH_NOTEPLAINTEXT_LEADING 1
+#define ZCASH_V_SIZE 8
+#define ZCASH_RHO_SIZE 32
+#define ZCASH_R_SIZE 32
+#define ZCASH_MEMO_SIZE 128
+
+#endif // _ZCCONSTANTS_H_