Move Sprout and Sapling circuits into zcash_proofs

Cargo.lock

@@ -567,7 +567,9 @@ dependencies = [
  "directories 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ff 0.4.0",
  "pairing 0.14.2",
+ "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_os 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "sapling-crypto 0.0.1",
  "zcash_primitives 0.0.0",
 ]

librustzcash/src/rustzcash.rs

@@ -26,8 +26,8 @@ use sapling_crypto::{
     },
 };
 
-use sapling_crypto::circuit::sapling::TREE_DEPTH as SAPLING_TREE_DEPTH;
-use sapling_crypto::circuit::sprout::{self, TREE_DEPTH as SPROUT_TREE_DEPTH};
+use zcash_proofs::circuit::sapling::TREE_DEPTH as SAPLING_TREE_DEPTH;
+use zcash_proofs::circuit::sprout::{self, TREE_DEPTH as SPROUT_TREE_DEPTH};
 
 use bellman::groth16::{
     create_random_proof, verify_proof, Parameters, PreparedVerifyingKey, Proof,

sapling-crypto/src/circuit/mod.rs

@@ -1,4 +1,3 @@
-#[cfg(test)]
 pub mod test;
 
 pub mod boolean;
@@ -12,9 +11,6 @@ pub mod pedersen_hash;
 pub mod multipack;
 pub mod sha256;
 
-pub mod sapling;
-pub mod sprout;
-
 use bellman::{
     SynthesisError
 };
@@ -25,7 +21,7 @@ use bellman::{
 /// This basically is just an extension to `Option`
 /// which allows for a convenient mapping to an
 /// error on `None`.
-trait Assignment<T> {
+pub trait Assignment<T> {
     fn get(&self) -> Result<&T, SynthesisError>;
 }
 

zcash_primitives/src/sapling.rs

@@ -14,8 +14,7 @@ use crate::merkle_tree::Hashable;
 use crate::redjubjub::{PrivateKey, PublicKey, Signature};
 use JUBJUB;
 
-pub(crate) const SAPLING_COMMITMENT_TREE_DEPTH: usize =
-    sapling_crypto::circuit::sapling::TREE_DEPTH;
+pub const SAPLING_COMMITMENT_TREE_DEPTH: usize = 32;
 
 /// Compute a parent node in the Sapling commitment tree given its two children.
 pub fn merkle_hash(depth: usize, lhs: &FrRepr, rhs: &FrRepr) -> FrRepr {

zcash_proofs/Cargo.toml

@@ -16,6 +16,10 @@ rand_os = "0.2"
 sapling-crypto = { path = "../sapling-crypto" }
 zcash_primitives = { path = "../zcash_primitives" }
 
+[dev-dependencies]
+rand_core = "0.5"
+rand_xorshift = "0.2"
+
 [features]
 default = ["local-prover"]
 local-prover = ["directories"]

zcash_proofs/examples/bench.rs

@@ -4,6 +4,7 @@ extern crate bellman;
 extern crate pairing;
 extern crate rand_core;
 extern crate rand_xorshift;
+extern crate zcash_proofs;
 
 use ff::Field;
 use std::time::{Duration, Instant};
@@ -12,7 +13,7 @@ use sapling_crypto::jubjub::{
     edwards,
     fs,
 };
-use sapling_crypto::circuit::sapling::{
+use zcash_proofs::circuit::sapling::{
     Spend
 };
 use sapling_crypto::primitives::{

zcash_proofs/src/circuit.rs

@@ -0,0 +1,2 @@
+pub mod sapling;
+pub mod sprout;

zcash_proofs/src/circuit/sapling.rs

@@ -6,28 +6,28 @@ use bellman::{
     Circuit
 };
 
-use jubjub::{
+use sapling_crypto::jubjub::{
     JubjubEngine,
     FixedGenerators
 };
 
-use constants;
+use sapling_crypto::constants;
 
-use primitives::{
+use sapling_crypto::primitives::{
     ValueCommitment,
     ProofGenerationKey,
     PaymentAddress
 };
 
-use super::Assignment;
-use super::boolean;
-use super::ecc;
-use super::pedersen_hash;
-use super::blake2s;
-use super::num;
-use super::multipack;
+use sapling_crypto::circuit::Assignment;
+use sapling_crypto::circuit::boolean;
+use sapling_crypto::circuit::ecc;
+use sapling_crypto::circuit::pedersen_hash;
+use sapling_crypto::circuit::blake2s;
+use sapling_crypto::circuit::num;
+use sapling_crypto::circuit::multipack;
 
-pub const TREE_DEPTH: usize = 32;
+pub const TREE_DEPTH: usize = zcash_primitives::sapling::SAPLING_COMMITMENT_TREE_DEPTH;
 
 /// This is an instance of the `Spend` circuit.
 pub struct Spend<'a, E: JubjubEngine> {
@@ -602,9 +602,12 @@ fn test_input_circuit_with_bls12_381() {
     use pairing::bls12_381::*;
     use rand_core::{RngCore, SeedableRng};
     use rand_xorshift::XorShiftRng;
-
-    use ::circuit::test::*;
-    use jubjub::{JubjubBls12, fs, edwards};
+    use sapling_crypto::{
+        circuit::test::*,
+        jubjub::{JubjubBls12, fs, edwards},
+        pedersen_hash,
+        primitives::{Diversifier, Note, ProofGenerationKey},
+    };
 
     let params = &JubjubBls12::new();
     let rng = &mut XorShiftRng::from_seed([
@@ -623,7 +626,7 @@ fn test_input_circuit_with_bls12_381() {
         let nsk = fs::Fs::random(rng);
         let ak = edwards::Point::rand(rng, params).mul_by_cofactor(params);
 
-        let proof_generation_key = ::primitives::ProofGenerationKey {
+        let proof_generation_key = ProofGenerationKey {
             ak: ak.clone(),
             nsk: nsk.clone()
         };
@@ -636,7 +639,7 @@ fn test_input_circuit_with_bls12_381() {
             let diversifier = {
                 let mut d = [0; 11];
                 rng.fill_bytes(&mut d);
-                ::primitives::Diversifier(d)
+                Diversifier(d)
             };
 
             if let Some(p) = viewing_key.into_payment_address(
@@ -657,7 +660,7 @@ fn test_input_circuit_with_bls12_381() {
         {
             let rk = viewing_key.rk(ar, params).into_xy();
             let expected_value_cm = value_commitment.cm(params).into_xy();
-            let note = ::primitives::Note {
+            let note = Note {
                 value: value_commitment.value,
                 g_d: g_d.clone(),
                 pk_d: payment_address.pk_d.clone(),
@@ -685,8 +688,8 @@ fn test_input_circuit_with_bls12_381() {
                 lhs.reverse();
                 rhs.reverse();
 
-                cur = ::pedersen_hash::pedersen_hash::<Bls12, _>(
-                    ::pedersen_hash::Personalization::MerkleTree(i),
+                cur = pedersen_hash::pedersen_hash::<Bls12, _>(
+                    pedersen_hash::Personalization::MerkleTree(i),
                     lhs.into_iter()
                        .take(Fr::NUM_BITS as usize)
                        .chain(rhs.into_iter().take(Fr::NUM_BITS as usize)),
@@ -743,8 +746,11 @@ fn test_output_circuit_with_bls12_381() {
     use pairing::bls12_381::*;
     use rand_core::{RngCore, SeedableRng};
     use rand_xorshift::XorShiftRng;
-    use ::circuit::test::*;
-    use jubjub::{JubjubBls12, fs, edwards};
+    use sapling_crypto::{
+        circuit::test::*,
+        jubjub::{JubjubBls12, fs, edwards},
+        primitives::{Diversifier, ProofGenerationKey},
+    };
 
     let params = &JubjubBls12::new();
     let rng = &mut XorShiftRng::from_seed([
@@ -761,7 +767,7 @@ fn test_output_circuit_with_bls12_381() {
         let nsk = fs::Fs::random(rng);
         let ak = edwards::Point::rand(rng, params).mul_by_cofactor(params);
 
-        let proof_generation_key = ::primitives::ProofGenerationKey {
+        let proof_generation_key = ProofGenerationKey {
             ak: ak.clone(),
             nsk: nsk.clone()
         };
@@ -774,7 +780,7 @@ fn test_output_circuit_with_bls12_381() {
             let diversifier = {
                 let mut d = [0; 11];
                 rng.fill_bytes(&mut d);
-                ::primitives::Diversifier(d)
+                Diversifier(d)
             };
 
             if let Some(p) = viewing_key.into_payment_address(

zcash_proofs/src/circuit/sprout/commitment.rs

@@ -1,9 +1,9 @@
 use pairing::{Engine};
 use bellman::{ConstraintSystem, SynthesisError};
-use circuit::sha256::{
+use sapling_crypto::circuit::sha256::{
     sha256
 };
-use circuit::boolean::{
+use sapling_crypto::circuit::boolean::{
     Boolean
 };
 

zcash_proofs/src/circuit/sprout/input.rs

@@ -1,9 +1,9 @@
 use pairing::{Engine};
 use bellman::{ConstraintSystem, SynthesisError};
-use circuit::sha256::{
+use sapling_crypto::circuit::sha256::{
     sha256_block_no_padding
 };
-use circuit::boolean::{
+use sapling_crypto::circuit::boolean::{
     AllocatedBit,
     Boolean
 };

zcash_proofs/src/circuit/sprout/mod.rs

@@ -1,11 +1,11 @@
 use ff::Field;
 use pairing::Engine;
 use bellman::{ConstraintSystem, SynthesisError, Circuit, LinearCombination};
-use circuit::boolean::{
+use sapling_crypto::circuit::boolean::{
     AllocatedBit,
     Boolean
 };
-use circuit::multipack::pack_into_inputs;
+use sapling_crypto::circuit::multipack::pack_into_inputs;
 
 mod prfs;
 mod commitment;
@@ -355,7 +355,7 @@ fn witness_u252<E, CS>(
 #[test]
 fn test_sprout_constraints() {
     use pairing::bls12_381::{Bls12};
-    use ::circuit::test::*;
+    use sapling_crypto::circuit::test::*;
 
     use byteorder::{WriteBytesExt, ReadBytesExt, LittleEndian};
 
@@ -479,7 +479,7 @@ fn test_sprout_constraints() {
         expected_inputs.write_u64::<LittleEndian>(vpub_old.unwrap()).unwrap();
         expected_inputs.write_u64::<LittleEndian>(vpub_new.unwrap()).unwrap();
 
-        use circuit::multipack;
+        use sapling_crypto::circuit::multipack;
 
         let expected_inputs = multipack::bytes_to_bits(&expected_inputs);
         let expected_inputs = multipack::compute_multipacking::<Bls12>(&expected_inputs);

zcash_proofs/src/circuit/sprout/output.rs

@@ -1,6 +1,6 @@
 use pairing::{Engine};
 use bellman::{ConstraintSystem, SynthesisError};
-use circuit::boolean::{Boolean};
+use sapling_crypto::circuit::boolean::{Boolean};
 
 use super::*;
 use super::prfs::*;

zcash_proofs/src/circuit/sprout/prfs.rs

@@ -1,9 +1,9 @@
 use pairing::{Engine};
 use bellman::{ConstraintSystem, SynthesisError};
-use circuit::sha256::{
+use sapling_crypto::circuit::sha256::{
     sha256_block_no_padding
 };
-use circuit::boolean::{
+use sapling_crypto::circuit::boolean::{
     Boolean
 };
 

zcash_proofs/src/lib.rs

@@ -10,12 +10,19 @@ extern crate zcash_primitives;
 #[cfg(feature = "local-prover")]
 extern crate directories;
 
+#[cfg(test)]
+extern crate rand_core;
+
+#[cfg(test)]
+extern crate rand_xorshift;
+
 use bellman::groth16::{prepare_verifying_key, Parameters, PreparedVerifyingKey, VerifyingKey};
 use pairing::bls12_381::Bls12;
 use std::fs::File;
 use std::io::{self, BufReader};
 use std::path::Path;
 
+pub mod circuit;
 mod hashreader;
 pub mod sapling;
 

zcash_proofs/src/sapling/prover.rs

@@ -5,10 +5,7 @@ use ff::Field;
 use pairing::bls12_381::{Bls12, Fr};
 use rand_os::OsRng;
 use sapling_crypto::{
-    circuit::{
-        multipack,
-        sapling::{Output, Spend},
-    },
+    circuit::multipack,
     jubjub::{edwards, fs::Fs, FixedGenerators, JubjubBls12, Unknown},
     primitives::{Diversifier, Note, PaymentAddress, ProofGenerationKey, ValueCommitment},
 };
@@ -20,6 +17,7 @@ use zcash_primitives::{
 };
 
 use super::compute_value_balance;
+use crate::circuit::sapling::{Output, Spend};
 
 /// A context object for creating the Sapling components of a Zcash transaction.
 pub struct SaplingProvingContext {