hush3/depends/patches/librustzcash/no-groth16.patch

diff --git a/librustzcash/src/rustzcash.rs b/librustzcash/src/rustzcash.rs
index da448b0..4503ec9 100644
--- a/librustzcash/src/rustzcash.rs
+++ b/librustzcash/src/rustzcash.rs
@@ -181,6 +181,8 @@ pub extern "system" fn librustzcash_init_zksnark_params(
     )
 }
 
+// We ignore the values of sprout_path/sprout_hash but keep
+// same function signature for convenience
 fn init_zksnark_params(
     spend_path: &Path,
     spend_hash: *const c_char,
@@ -205,7 +207,8 @@ fn init_zksnark_params(
         .expect("hash should be a valid string");
 
     // Load params
-    let (spend_params, spend_vk, output_params, output_vk, sprout_vk) = load_parameters(
+    //let (spend_params, spend_vk, output_params, output_vk, sprout_vk) = load_parameters(
+    let (spend_params, spend_vk, output_params, output_vk) = load_parameters(
         spend_path,
         spend_hash,
         output_path,
@@ -223,7 +226,7 @@ fn init_zksnark_params(
 
         SAPLING_SPEND_VK = Some(spend_vk);
         SAPLING_OUTPUT_VK = Some(output_vk);
-        SPROUT_GROTH16_VK = Some(sprout_vk.unwrap());
+        //SPROUT_GROTH16_VK = Some(sprout_vk.unwrap());
     }
 }
 
@@ -864,7 +867,7 @@ pub extern "system" fn librustzcash_sprout_prove(
     )
     .expect("couldn't load Sprout groth16 parameters file");
 
-    let mut sprout_fs = BufReader::with_capacity(1024 * 1024, sprout_fs);
+    //let mut sprout_fs = BufReader::with_capacity(1024 * 1024, sprout_fs);
 
     let params = Parameters::<Bls12>::read(&mut sprout_fs, false)
         .expect("couldn't deserialize Sprout JoinSplit parameters file");
diff --git a/zcash_proofs/src/lib.rs b/zcash_proofs/src/lib.rs
index ca17a8b..36f89d3 100644
--- a/zcash_proofs/src/lib.rs
+++ b/zcash_proofs/src/lib.rs
@@ -32,14 +32,12 @@ pub fn load_parameters(
     // Load from each of the paths
     let spend_fs = File::open(spend_path).expect("couldn't load Sapling spend parameters file");
     let output_fs = File::open(output_path).expect("couldn't load Sapling output parameters file");
-    let sprout_fs =
-        sprout_path.map(|p| File::open(p).expect("couldn't load Sprout groth16 parameters file"));
+    //let sprout_fs = sprout_path.map(|p| File::open(p).expect("couldn't load Sprout groth16 parameters file"));
 
     let mut spend_fs = hashreader::HashReader::new(BufReader::with_capacity(1024 * 1024, spend_fs));
     let mut output_fs =
         hashreader::HashReader::new(BufReader::with_capacity(1024 * 1024, output_fs));
-    let mut sprout_fs =
-        sprout_fs.map(|fs| hashreader::HashReader::new(BufReader::with_capacity(1024 * 1024, fs)));
+    //let mut sprout_fs = sprout_fs.map(|fs| hashreader::HashReader::new(BufReader::with_capacity(1024 * 1024, fs)));
 
     // Deserialize params
     let spend_params = Parameters::<Bls12>::read(&mut spend_fs, false)
@@ -50,10 +48,10 @@ pub fn load_parameters(
     // We only deserialize the verifying key for the Sprout parameters, which
     // appears at the beginning of the parameter file. The rest is loaded
     // during proving time.
-    let sprout_vk = sprout_fs.as_mut().map(|mut fs| {
-        VerifyingKey::<Bls12>::read(&mut fs)
-            .expect("couldn't deserialize Sprout Groth16 verifying key")
-    });
+    //let sprout_vk = sprout_fs.as_mut().map(|mut fs| {
+    //    VerifyingKey::<Bls12>::read(&mut fs)
+    //        .expect("couldn't deserialize Sprout Groth16 verifying key")
+    //});
 
     // There is extra stuff (the transcript) at the end of the parameter file which is
     // used to verify the parameter validity, but we're not interested in that. We do
@@ -64,10 +62,10 @@ pub fn load_parameters(
         .expect("couldn't finish reading Sapling spend parameter file");
     io::copy(&mut output_fs, &mut sink)
         .expect("couldn't finish reading Sapling output parameter file");
-    if let Some(mut sprout_fs) = sprout_fs.as_mut() {
-        io::copy(&mut sprout_fs, &mut sink)
-            .expect("couldn't finish reading Sprout groth16 parameter file");
-    }
+    //if let Some(mut sprout_fs) = sprout_fs.as_mut() {
+    //    io::copy(&mut sprout_fs, &mut sink)
+    //        .expect("couldn't finish reading Sprout groth16 parameter file");
+    //}
 
     if spend_fs.into_hash() != spend_hash {
         panic!("Sapling spend parameter file is not correct, please clean your `~/.zcash-params/` and re-run `fetch-params`.");
@@ -77,14 +75,15 @@ pub fn load_parameters(
         panic!("Sapling output parameter file is not correct, please clean your `~/.zcash-params/` and re-run `fetch-params`.");
     }
 
-    if sprout_fs.map(|fs| fs.into_hash()) != sprout_hash.map(|h| h.to_owned()) {
-        panic!("Sprout groth16 parameter file is not correct, please clean your `~/.zcash-params/` and re-run `fetch-params`.");
-    }
+    //if sprout_fs.map(|fs| fs.into_hash()) != sprout_hash.map(|h| h.to_owned()) {
+    //    panic!("Sprout groth16 parameter file is not correct, please clean your `~/.zcash-params/` and re-run `fetch-params`.");
+    //}
 
     // Prepare verifying keys
     let spend_vk = prepare_verifying_key(&spend_params.vk);
     let output_vk = prepare_verifying_key(&output_params.vk);
-    let sprout_vk = sprout_vk.map(|vk| prepare_verifying_key(&vk));
+    //let sprout_vk = sprout_vk.map(|vk| prepare_verifying_key(&vk));
 
-    (spend_params, spend_vk, output_params, output_vk, sprout_vk)
+    //(spend_params, spend_vk, output_params, output_vk, sprout_vk)
+    (spend_params, spend_vk, output_params, output_vk)
 }