add host fills from built block to block header

This PR adds the host fills from the build block to the rollup block
header

Author: dylanlott

src/tasks/submit.rs

@@ -193,9 +193,6 @@ impl SubmitTask {
         resp: &SignResponse,
         block: &BuiltBlock,
     ) -> Result<TransactionRequest, eyre::Error> {
-        // TODO: ENG-1082 Implement fills
-        let fills = vec![];
-
         // manually retrieve nonce
         let nonce =
             self.provider().get_transaction_count(self.provider().default_signer_address()).await?;
@@ -223,6 +220,10 @@ impl SubmitTask {
         };
         debug!(?header, "built block header");
 
+        // Extract fills from the built block
+        let fills = self.extract_fills(block);
+        debug!(?fills, "extracted fills");
+        
         // Create a blob transaction with the blob header and signature values and return it
         let tx = self
             .build_blob_tx(fills, header, v, r, s, block)?
@@ -395,6 +396,15 @@ impl SubmitTask {
         Ok(block_num + 1)
     }
 
+    // This function converts &[SignedFill] --> [FillPermit2]
+    fn extract_fills(&self, block: &BuiltBlock) -> Vec<FillPermit2> {
+        let mut fills = vec![];
+        for signed_fill in block.host_fills() {
+            fills.push(FillPermit2::from(signed_fill))
+        }
+        fills
+    }
+
     /// Task future for the submit task
     /// NB: This task assumes that the simulator will only send it blocks for
     /// slots that it's assigned.
@@ -442,6 +452,7 @@ impl SubmitTask {
     }
 }
 
+
 // Returns gas parameters based on retry counts. This uses
 fn calculate_gas_limits(
     retry_count: usize,