nostr: use generic for hex::encode

Partially revert e200fbe

Signed-off-by: Yuki Kishimoto <[email protected]>

crates/nostr/src/key/public_key.rs

@@ -92,7 +92,7 @@ impl PublicKey {
     /// Get public key as `hex` string
     #[inline]
     pub fn to_hex(&self) -> String {
-        hex::encode(&self.to_bytes())
+        hex::encode(self.to_bytes())
     }
 
     /// Get public key as `bytes`

crates/nostr/src/util/hex.rs

@@ -50,7 +50,11 @@ const fn from_digit(num: u8) -> u8 {
 
 /// Hex encode
 #[inline]
-pub fn encode(data: &[u8]) -> String {
+pub fn encode<T>(data: T) -> String
+where
+    T: AsRef<[u8]>,
+{
+    let data: &[u8] = data.as_ref();
     let mut hex: String = String::with_capacity(2 * data.len());
     for byte in data.iter() {
         hex.push(from_digit(byte >> 4) as char);