1 files changed, 7 insertions, 7 deletions
diff --git a/src/hasher.rs b/src/hasher.rs
index a26dd3c..101b23c 100644
--- a/src/hasher.rs
+++ b/src/hasher.rs
@@ -7,8 +7,8 @@ use sha2::{Digest, Sha256};
 ///
 /// This allows the Merkle tree to use any hash function that conforms to this interface.
 pub trait Hasher {
-    /// Hashes an input string and returns the resulting hash as a hexadecimal string.
-    fn hash(&self, input: &str) -> String;
+    /// Hashes a sequence of bytes and returns the resulting hash as a hexadecimal string.
+    fn hash(&self, input: &[u8]) -> String;
 }
 
 /// A dummy hasher used for testing or demonstration purposes.
@@ -17,7 +17,7 @@ pub trait Hasher {
 pub struct DefaultHasher;
 
 impl Hasher for DefaultHasher {
-    fn hash(&self, _input: &str) -> String {
+    fn hash(&self, _input: &[u8]) -> String {
         "0xc0ff3".to_string()
     }
 }
@@ -28,9 +28,9 @@ pub struct SHA256Hasher;
 
 #[cfg(feature = "sha256")]
 impl Hasher for SHA256Hasher {
-    fn hash(&self, input: &str) -> String {
+    fn hash(&self, input: &[u8]) -> String {
         let mut hasher = Sha256::new();
-        hasher.update(input.as_bytes());
+        hasher.update(input);
         hex::encode(hasher.finalize())
     }
 }
@@ -42,7 +42,7 @@ mod tests {
     #[test]
     fn test_sha256_hasher_with_known_input() {
         let hasher = SHA256Hasher;
-        let input = "hello";
+        let input = "hello".as_bytes();
         let expected_hash = "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824";
         let actual_hash = hasher.hash(input);
         assert_eq!(actual_hash, expected_hash);
@@ -51,7 +51,7 @@ mod tests {
     #[test]
     fn test_sha256_hasher_empty_string() {
         let hasher = SHA256Hasher;
-        let input = "";
+        let input = &[];
         let expected_hash = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855";
         let actual_hash = hasher.hash(input);
         assert_eq!(actual_hash, expected_hash);