feat!: return Pedersen structure in stdlib (#3190)

Co-authored-by: Tom French <15848336+TomAFrench@users.noreply.github.com>
Co-authored-by: kek kek kek <andriy.n@obox.systems>
Co-authored-by: kevaundray <kevtheappdev@gmail.com>
Co-authored-by: jfecher <jake@aztecprotocol.com>
Co-authored-by: josh crites <jc@joshcrites.com>
Co-authored-by: github-merge-queue[bot] <github-merge-queue[bot]@users.noreply.github.com>
Co-authored-by: Martin Verzilli <martin.verzilli@gmail.com>
Co-authored-by: Savio <72797635+Savio-Sou@users.noreply.github.com>
Co-authored-by: Alex Gherghisan <alexghr@users.noreply.github.com>
Co-authored-by: vezenovm <mvezenov@gmail.com>
Co-authored-by: José Pedro Sousa <jose@aztecprotocol.com>
Co-authored-by: jfecher <jfecher11@gmail.com>
Co-authored-by: Álvaro Rodríguez <sirasistant@gmail.com>
Co-authored-by: Gustavo Giráldez <ggiraldez@manas.tech>
Co-authored-by: Jan Beneš <janbenes1234@gmail.com>
Co-authored-by: Maddiaa <47148561+Maddiaa0@users.noreply.github.com>
Co-authored-by: Tom French <tom@tomfren.ch>

noir_stdlib/src/hash.nr

@@ -7,12 +7,25 @@ pub fn sha256<N>(_input : [u8; N]) -> [u8; 32] {}
 #[foreign(blake2s)]
 pub fn blake2s<N>(_input : [u8; N]) -> [u8; 32] {}
 
-pub fn pedersen_commitment<N>(input : [Field; N]) -> [Field; 2] {
+struct PedersenPoint {
+   x : Field,
+   y : Field,
+}
+
+pub fn pedersen_commitment<N>(input : [Field; N]) -> PedersenPoint {
     pedersen_commitment_with_separator(input, 0)
 }
 
 #[foreign(pedersen)]
-pub fn pedersen_commitment_with_separator<N>(_input : [Field; N], _separator : u32) -> [Field; 2] {}
+pub fn __pedersen_commitment_with_separator<N>(_input : [Field; N], _separator : u32) -> [Field; 2] {}
+
+pub fn pedersen_commitment_with_separator<N>(input : [Field; N], separator : u32) -> PedersenPoint {
+  let values = __pedersen_commitment_with_separator(input, separator);
+  PedersenPoint {
+     x: values[0],
+     y: values[1],
+  }
+}
 
 pub fn pedersen_hash<N>(input : [Field; N]) -> Field {
     pedersen_hash_with_separator(input, 0)

noir_stdlib/src/lib.nr

@@ -63,4 +63,4 @@ pub fn wrapping_mul<T>(x : T, y: T) -> T {
 /// Shift-left x by y bits
 /// If the result overflow the bitsize; it does not fail and returns 0 instead
 #[builtin(wrapping_shift_left)]
-pub fn wrapping_shift_left<T>(x : T, y: T) -> T {}
+pub fn wrapping_shift_left<T>(_x : T, _y: T) -> T {}

tooling/debugger/src/lib.rs

@@ -5,6 +5,7 @@ use acvm::BlackBoxFunctionSolver;
 use acvm::{acir::circuit::Circuit, acir::native_types::WitnessMap};
 
 use nargo::artifacts::debug::DebugArtifact;
+
 use nargo::NargoError;
 
 pub fn debug_circuit<B: BlackBoxFunctionSolver>(

tooling/nargo_cli/tests/compile_success_empty/trait_override_implementation/src/main.nr

@@ -39,17 +39,20 @@ impl F for Bar {
     fn f3(self) -> Field { 30 }
 }
 
+
 // Impls on mutable references are temporarily disabled
 // impl F for &mut Bar {
 //     fn f1(self) -> Field { 101 }
 //     fn f5(self) -> Field { 505 }
 // }
 
+
 fn main(x: Field) {
     let first = Foo::method2(x);
     assert(first == 3 * x);
 
     let bar = Bar{};
+
     assert(bar.f1() == 10, "1");
     assert(bar.f2() == 2, "2");
     assert(bar.f3() == 30, "3");
@@ -71,3 +74,4 @@ fn main(x: Field) {
     assert(bar_mut.f4() == 4, "14");
     assert(bar_mut.f5() == 50, "15");
 }
+

tooling/nargo_cli/tests/execution_success/brillig_pedersen/src/main.nr

@@ -2,12 +2,15 @@ use dep::std;
 
 unconstrained fn main(x: Field, y: Field, salt: Field, out_x: Field, out_y: Field, out_hash: Field) {
     let res = std::hash::pedersen_commitment_with_separator([x, y], 0);
-    assert(res[0] == out_x);
-    assert(res[1] == out_y);
+    assert(res.x == out_x);
+    assert(res.y == out_y);
+
+
     let res_hash = std::hash::pedersen_hash_with_separator([x, y], 0);
     assert_eq(res_hash, out_hash);
 
-    assert(res_hash != res[0]);
+    assert(res_hash != res.x);
+
 
     let raw_data = [x, y];
     let mut state = 0;
@@ -16,6 +19,6 @@ unconstrained fn main(x: Field, y: Field, salt: Field, out_x: Field, out_y: Fiel
     }
     state += salt;
     let hash = std::hash::pedersen_commitment_with_separator([state], 0);
-    assert(std::hash::pedersen_commitment_with_separator([43], 0)[0] == hash[0]);
+    assert(std::hash::pedersen_commitment_with_separator([43], 0).x == hash.x);
 }
 

tooling/nargo_cli/tests/execution_success/pedersen_check/src/main.nr

@@ -2,12 +2,14 @@ use dep::std;
 
 fn main(x: Field, y: Field, salt: Field, out_x: Field, out_y: Field, out_hash: Field) {
     let res = std::hash::pedersen_commitment([x, y]);
-    assert(res[0] == out_x);
-    assert(res[1] == out_y);
+    assert(res.x == out_x);
+    assert(res.y == out_y);
+
     let res_hash = std::hash::pedersen_hash_with_separator([x, y], 0);
     assert_eq(res_hash, out_hash);
 
-    assert(res_hash != res[0]);
+    assert(res_hash != res.x);
+
 
     let raw_data = [x, y];
     let mut state = 0;
@@ -16,6 +18,6 @@ fn main(x: Field, y: Field, salt: Field, out_x: Field, out_y: Field, out_hash: F
     }
     state += salt;
     let hash = std::hash::pedersen_commitment([state]);
-    assert(std::hash::pedersen_commitment([43])[0] == hash[0]);
+    assert(std::hash::pedersen_commitment([43]).x == hash.x);
 }
 

tooling/nargo_cli/tests/execution_success/simple_shield/src/main.nr

@@ -23,13 +23,13 @@ fn main(
     let note_commitment = std::hash::pedersen_commitment([pubkey_x, pubkey_y]);
 
     // Compute input note nullifier
-    let nullifier = std::hash::pedersen_commitment([note_commitment[0], index, priv_key]);
+    let nullifier = std::hash::pedersen_commitment([note_commitment.x, index, priv_key]);
 
     // Compute output note nullifier
     let receiver_note_commitment = std::hash::pedersen_commitment([to_pubkey_x, to_pubkey_y]);
 
     // Check that the input note nullifier is in the root
-    assert(note_root == std::merkle::compute_merkle_root(note_commitment[0], index, note_hash_path));
+    assert(note_root == std::merkle::compute_merkle_root(note_commitment.x, index, note_hash_path));
 
-    [nullifier[0], receiver_note_commitment[0]]
+    [nullifier.x, receiver_note_commitment.x]
 }

tooling/nargo_cli/tests/noir_test_success/should_fail_with_matches/src/main.nr

@@ -10,10 +10,10 @@ fn test_should_fail_without_match() {
 
 #[test(should_fail_with = "Not equal")]
 fn test_should_fail_with_runtime_match() {
-    assert_eq(dep::std::hash::pedersen_commitment([27])[0], 0, "Not equal");
+    assert_eq(dep::std::hash::pedersen_commitment([27]).x, 0, "Not equal");
 }
 
 #[test(should_fail)]
 fn test_should_fail_without_runtime_match() {
-    assert_eq(dep::std::hash::pedersen_commitment([27])[0], 0);
+    assert_eq(dep::std::hash::pedersen_commitment([27]).x, 0);
 }