Implementation of Sapling transaction verification.

include/librustzcash.h

@@ -36,6 +36,46 @@ extern "C" {
         const unsigned char *b,
         unsigned char *result
     );
+
+    /// Creates a Sapling verification context. Please free this
+    /// when you're done.
+    void * librustzcash_sapling_verification_ctx_init();
+
+    /// Check the validity of a Sapling Spend description,
+    /// accumulating the value commitment into the context.
+    bool librustzcash_sapling_check_spend(
+        void *ctx,
+        const unsigned char *cv,
+        const unsigned char *anchor,
+        const unsigned char *nullifier,
+        const unsigned char *rk,
+        const unsigned char *zkproof,
+        const unsigned char *spendAuthSig,
+        const unsigned char *sighashValue
+    );
+
+    /// Check the validity of a Sapling Output description,
+    /// accumulating the value commitment into the context.
+    bool librustzcash_sapling_check_output(
+        void *ctx,
+        const unsigned char *cv,
+        const unsigned char *cm,
+        const unsigned char *ephemeralKey,
+        const unsigned char *zkproof
+    );
+
+    /// Finally checks the validity of the entire Sapling
+    /// transaction given valueBalance and the binding signature.
+    bool librustzcash_sapling_final_check(
+        void *ctx,
+        int64_t valueBalance,
+        const unsigned char *bindingSig,
+        const unsigned char *sighashValue
+    );
+
+    /// Frees a Sapling verification context returned from
+    /// `librustzcash_sapling_verification_ctx_init`.
+    void librustzcash_sapling_verification_ctx_free(void *);
 }
 
 #endif // LIBRUSTZCASH_INCLUDE_H_