Remove alloc for extensions

src/merkle/types.rs

@@ -7,7 +7,7 @@ pub enum Version {
 	V1 = 0
 }
 
-pub type CtExtensions = Vec<u8>;
+pub type CtExtensions<'a> = &'a [u8];
 
 #[repr(u8)]
 #[non_exhaustive]
@@ -16,7 +16,7 @@ pub enum MerkleLeafType<'a> {
 	TimeStampedEntry {
 		timestamp: u64,
 		entry_type: LogEntryType<'a>,
-		extensions: CtExtensions
+		extensions: CtExtensions<'a>
 	} = 0
 }
 

src/parsing/leaf.rs

@@ -95,14 +95,14 @@ pub fn parse_merkle_tree_leaf(
 
 				let (
 					_,             // no more to parse
-					ct_extensions  // opaque CtExtensions<0..2^16-1>
+					extensions  // opaque CtExtensions<0..2^16-1>
 				) = nom::multi::length_data(nom::number::complete::be_u16)(input)
 					.map_err(|e| e.map(|e| LeafParsingError::Nom(e)))?;
 
 				MerkleLeafType::TimeStampedEntry {
 					timestamp,
 					entry_type,
-					extensions: ct_extensions.to_vec()
+					extensions
 				}
 			}
 			_ =>