From 97d4b9983606c1f86016152241ebf47d8b546ada Mon Sep 17 00:00:00 2001
From: Tom French <tom@tomfren.ch>
Date: Tue, 25 Apr 2023 19:12:49 +0100
Subject: [PATCH] feat!: remove dead blake2 code

---
 barretenberg_static_lib/src/blake2s.rs | 44 --------------------
 barretenberg_static_lib/src/lib.rs     |  1 -
 barretenberg_wasm/src/blake2s.rs       | 56 --------------------------
 barretenberg_wasm/src/lib.rs           |  1 -
 4 files changed, 102 deletions(-)
 delete mode 100644 barretenberg_static_lib/src/blake2s.rs
 delete mode 100644 barretenberg_wasm/src/blake2s.rs

diff --git a/barretenberg_static_lib/src/blake2s.rs b/barretenberg_static_lib/src/blake2s.rs
deleted file mode 100644
index 349da4f0..00000000
--- a/barretenberg_static_lib/src/blake2s.rs
+++ /dev/null
@@ -1,44 +0,0 @@
-use common::acvm::FieldElement;
-
-use super::Barretenberg;
-
-impl Barretenberg {
-    /// Hashes to a bn254 scalar field element using blake2s
-    pub fn hash_to_field(&mut self, input: &[u8]) -> FieldElement {
-        let result_prt = barretenberg_sys::blake2s::hash_to_field(input);
-
-        FieldElement::from_be_bytes_reduce(&result_prt)
-    }
-}
-
-#[test]
-fn basic_interop() {
-    // Expected values were taken from barretenberg by running `crypto::pedersen::compress_native`
-    // printing the result in hex to `std::cout` and copying
-    struct Test<'a> {
-        input: Vec<u8>,
-        expected_hex: &'a str,
-    }
-
-    let tests = vec![
-        Test {
-            input: vec![0; 64],
-            expected_hex: "0x1cdcf02431ba623767fe389337d011df1048dcc24b98ed81cec97627bab454a0",
-        },
-        Test {
-            input: vec![1; 64],
-            expected_hex: "0x1aab12b2f330c2fb811d6042f10ce65c0678803354529dc7f9bb5b1d9ff6987b",
-        },
-        Test {
-            input: vec![2; 64],
-            expected_hex: "0x06c2335d6f7acb84bbc7d0892cefebb7ca31169a89024f24814d5785e0d05324",
-        },
-    ];
-
-    let mut barretenberg = Barretenberg::new();
-    for test in tests {
-        let expected = FieldElement::from_hex(test.expected_hex).unwrap();
-        let got = barretenberg.hash_to_field(&test.input);
-        assert_eq!(got, expected);
-    }
-}
diff --git a/barretenberg_static_lib/src/lib.rs b/barretenberg_static_lib/src/lib.rs
index 660ec217..7a0f87b1 100644
--- a/barretenberg_static_lib/src/lib.rs
+++ b/barretenberg_static_lib/src/lib.rs
@@ -3,7 +3,6 @@
 
 pub mod acvm_interop;
 pub use acvm_interop::Plonk;
-pub mod blake2s;
 pub mod composer;
 mod crs;
 pub mod pedersen;
diff --git a/barretenberg_wasm/src/blake2s.rs b/barretenberg_wasm/src/blake2s.rs
deleted file mode 100644
index e61f54bb..00000000
--- a/barretenberg_wasm/src/blake2s.rs
+++ /dev/null
@@ -1,56 +0,0 @@
-use super::{Barretenberg, FIELD_BYTES};
-use common::acvm::FieldElement;
-use wasmer::Value;
-
-impl Barretenberg {
-    // TODO : Replace this call with a blake2s call and a field element reduce
-    /// Hashes to a bn254 scalar field element using blake2s
-    pub fn hash_to_field(&mut self, input: &[u8]) -> FieldElement {
-        let input_ptr = self.allocate(input);
-        let result_ptr: usize = 0;
-
-        self.call_multiple(
-            "blake2s_to_field",
-            vec![
-                &input_ptr,
-                &Value::I32(input.len() as i32),
-                &Value::I32(result_ptr as i32),
-            ],
-        );
-
-        self.free(input_ptr);
-
-        let result_bytes = self.slice_memory(result_ptr, FIELD_BYTES);
-        FieldElement::from_be_bytes_reduce(&result_bytes)
-    }
-}
-
-#[test]
-fn basic_interop() {
-    struct Test<'a> {
-        input: Vec<u8>,
-        expected_hex: &'a str,
-    }
-
-    let tests = vec![
-        Test {
-            input: vec![0; 64],
-            expected_hex: "0x1cdcf02431ba623767fe389337d011df1048dcc24b98ed81cec97627bab454a0",
-        },
-        Test {
-            input: vec![1; 64],
-            expected_hex: "0x1aab12b2f330c2fb811d6042f10ce65c0678803354529dc7f9bb5b1d9ff6987b",
-        },
-        Test {
-            input: vec![2; 64],
-            expected_hex: "0x06c2335d6f7acb84bbc7d0892cefebb7ca31169a89024f24814d5785e0d05324",
-        },
-    ];
-
-    let mut barretenberg = Barretenberg::new();
-    for test in tests {
-        let expected = FieldElement::from_hex(test.expected_hex).unwrap();
-        let got = barretenberg.hash_to_field(&test.input);
-        assert_eq!(got, expected);
-    }
-}
diff --git a/barretenberg_wasm/src/lib.rs b/barretenberg_wasm/src/lib.rs
index 9381d7f8..a69dc890 100644
--- a/barretenberg_wasm/src/lib.rs
+++ b/barretenberg_wasm/src/lib.rs
@@ -10,7 +10,6 @@ struct Wasm;
 pub mod acvm_interop;
 pub use acvm_interop::Plonk;
 pub use common::acvm::{Backend, PartialWitnessGenerator, ProofSystemCompiler};
-pub mod blake2s;
 pub mod composer;
 pub mod pedersen;
 pub mod pippenger;