refactor: doc & remove unimplemented function

Scarb.toml

@@ -5,7 +5,7 @@ edition = "2024_07"
 
 [dependencies]
 starknet = "2.8.4"
-utils = { git = "https://github.com/keep-starknet-strange/raito.git" }
+utils = { git = "https://github.com/keep-starknet-strange/raito.git", rev = "02a13045b7074ae2b3247431cd91f1ad76263fb2" }
 
 [dev-dependencies]
 snforge_std = { git = "https://github.com/foundry-rs/starknet-foundry.git", tag = "v0.31.0" }

src/interfaces.cairo

@@ -61,11 +61,18 @@ pub trait IUtuRelay<TContractState> {
         height_proof: Option<HeightProof>
     );
 
-    fn challenge_block(
-        ref self: TContractState, block_height: u64, blocks: Array<BlockHeader>
-    ) -> bool;
-
+    /// Returns the status of a block given its hash.
+    ///
+    /// This function retrieves information about any registered block, regardless of whether
+    /// it is part of the canonical chain or not. The returned status includes:
+    /// - registration_timestamp: when the block was registered
+    /// - prev_block_digest: hash of the previous block
+    /// - pow: proof of work value
     fn get_status(self: @TContractState, block_hash: Digest) -> BlockStatus;
 
+    /// Returns the hash of the block at the specified height in the canonical chain.
+    ///
+    /// This function retrieves the block hash for a given height in the canonical chain.
+    /// If no block is set at this height, it returns an empty Digest (Zero::zero()).
     fn get_block(self: @TContractState, height: u64) -> Digest;
 }

src/utu_relay.cairo

@@ -124,15 +124,6 @@ pub mod UtuRelay {
             }
         }
 
-
-        fn challenge_block(
-            ref self: ContractState, block_height: u64, blocks: Array<BlockHeader>
-        ) -> bool {
-            // Implementation for challenge_block
-            // For now, we'll just return false
-            false
-        }
-
         fn get_status(self: @ContractState, block_hash: Digest) -> BlockStatus {
             self.blocks.read(block_hash)
         }