feat: account ID refactor additional methods (#1039)

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Changes
 
+- Implemented `to_hex` for `AccountIdPrefix` and `epoch_block_num` for `BlockHeader` (#1039).
 - Added tracing to the `miden-tx-prover` CLI (#1014).
 - Added health check endpoints to the prover service (#1006).
 - Implemented serialization for `AccountHeader` (#996).

objects/src/accounts/account_id_prefix.rs

@@ -1,4 +1,4 @@
-use alloc::string::ToString;
+use alloc::string::{String, ToString};
 use core::fmt;
 
 use miden_crypto::utils::ByteWriter;
@@ -110,6 +110,11 @@ impl AccountIdPrefix {
         account_id::extract_version(self.first_felt.as_int())
             .expect("account id prefix should have been constructed with a valid version")
     }
+
+    /// Returns the prefix as a big-endian, hex-encoded string.
+    pub fn to_hex(&self) -> String {
+        format!("0x{:016x}", self.first_felt.as_int())
+    }
 }
 
 // CONVERSIONS FROM ACCOUNT ID PREFIX
@@ -201,7 +206,7 @@ impl Ord for AccountIdPrefix {
 
 impl fmt::Display for AccountIdPrefix {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "0x{:016x}", self.first_felt.as_int())
+        write!(f, "{}", self.to_hex())
     }
 }
 

objects/src/block/header.rs

@@ -186,6 +186,11 @@ impl BlockHeader {
         self.timestamp
     }
 
+    /// Returns the block number of the epoch block to which this block belongs.
+    pub fn epoch_block_num(&self) -> u32 {
+        block_num_from_epoch(self.block_epoch())
+    }
+
     // HELPERS
     // --------------------------------------------------------------------------------------------