nostr: Fix warning lints

Signed-off-by: Awiteb <[email protected]>

Author: TheAwiteb

crates/nostr/src/event/mod.rs

@@ -339,7 +339,7 @@ struct EventIntermediate<'a> {
     pub created_at: Cow<'a, Timestamp>,
     pub kind: Cow<'a, Kind>,
     pub tags: Cow<'a, Tags>,
-    pub content: Cow<'a, String>,
+    pub content: Cow<'a, str>,
     pub sig: Cow<'a, Signature>,
 }
 

crates/nostr/src/nips/nip06/bip32.rs

@@ -27,11 +27,9 @@ impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
             Self::Secp256k1(ref e) => write!(f, "{e}"),
-            Self::InvalidChildNumber(ref n) => write!(
-                f,
-                "child number {} is invalid (not within [0, 2^31 - 1])",
-                n
-            ),
+            Self::InvalidChildNumber(ref n) => {
+                write!(f, "child number {n} is invalid (not within [0, 2^31 - 1])")
+            }
         }
     }
 }

crates/nostr/src/nips/nip44/v2.rs

@@ -384,7 +384,7 @@ mod tests {
         for i in (0..len).step_by(2) {
             let high = val(hex[i], i);
             let low = val(hex[i + 1], i + 1);
-            bytes.push(high << 4 | low);
+            bytes.push((high << 4) | low);
         }
 
         bytes

crates/nostr/src/util/hex.rs

@@ -31,7 +31,7 @@ impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             Self::InvalidHexCharacter { c, index } => {
-                write!(f, "Invalid character {} at position {}", c, index)
+                write!(f, "Invalid character {c} at position {index}")
             }
             Self::OddLength => write!(f, "Odd number of digits"),
             Self::InvalidLength => write!(f, "Invalid length"),