with working blake3

src/hashes/blake3.rs

@@ -0,0 +1,47 @@
+use super::*;
+
+pub struct BLAKE3 {
+    hash: BITS256,
+    hasher: ::blake3::Hasher,
+}
+
+impl Hasher for BLAKE3 {
+    fn new() -> Self {
+        BLAKE3 {
+            hash: [0; 32],
+            hasher: ::blake3::Hasher::new(),
+        }
+    }
+
+    fn digest(&mut self, bytes: impl AsRef<[u8]>) {
+        self.hasher.update(bytes.as_ref());
+    }
+
+    fn complete(self) -> HashReturn {
+        let res = self.hasher.finalize();
+        let mut ret = BITS256::default();
+        ret.copy_from_slice(res.as_bytes());
+        HashReturn::BLAKE3(ret)
+    }
+}
+
+#[cfg(test)]
+pub mod test {
+    use super::*;
+
+    #[test]
+    fn test_blake3_hash() {
+        let input = "HelloWorld";
+        let expected_output = "0588e8d8f7d781f64f170e58bad59d3d4de9fd6e7a61af0109819b2a41d09309";
+
+        let mut blake3 = BLAKE3::new();
+
+        blake3.digest(input);
+
+        let result = blake3.complete().into_bytes();
+
+        let hash_out = crate::hex_table::u8_array_to_lower_hex_string(&result).unwrap();
+
+        assert_eq!(hash_out, expected_output);
+    }
+}