fix some issues while debugging

Author: noel2004

coordinator/internal/logic/provertask/bundle_prover_task.go

@@ -243,9 +243,14 @@ func (bp *BundleProverTask) formatProverTask(ctx context.Context, task *orm.Prov
 		return nil, fmt.Errorf("failed to get batch proofs for bundle task id:%s, no batch found", task.TaskID)
 	}
 
-	parentBatch, err := bp.batchOrm.GetBatchByHash(ctx, batches[0].ParentBatchHash)
-	if err != nil {
-		return nil, fmt.Errorf("failed to get parent batch for batch task id:%s err:%w", task.TaskID, err)
+	var prevStateRoot common.Hash
+	// this would be common in test cases: the first batch has empty parent
+	if batches[0].Index > 1 {
+		parentBatch, err := bp.batchOrm.GetBatchByHash(ctx, batches[0].ParentBatchHash)
+		if err != nil {
+			return nil, fmt.Errorf("failed to get parent batch for batch task id:%s err:%w", task.TaskID, err)
+		}
+		prevStateRoot = common.HexToHash(parentBatch.StateRoot)
 	}
 
 	var batchProofs []*message.OpenVMBatchProof
@@ -264,7 +269,7 @@ func (bp *BundleProverTask) formatProverTask(ctx context.Context, task *orm.Prov
 
 	taskDetail.BundleInfo = &message.OpenVMBundleInfo{
 		ChainID:       bp.cfg.L2.ChainID,
-		PrevStateRoot: common.HexToHash(parentBatch.StateRoot),
+		PrevStateRoot: prevStateRoot,
 		PostStateRoot: common.HexToHash(batches[len(batches)-1].StateRoot),
 		WithdrawRoot:  common.HexToHash(batches[len(batches)-1].WithdrawRoot),
 		NumBatches:    uint32(len(batches)),

crates/l2geth/src/rpc_client.rs

@@ -108,7 +108,7 @@ impl ChunkInterpreter for RpcClient<'_> {
                 .get_block_by_hash(block_hash)
                 .full()
                 .await?
-                .ok_or_else(|| eyre::eyre!("Block not found"))?;
+                .ok_or_else(|| eyre::eyre!("Block {block_hash} not found"))?;
 
             let number = block.header.number;
             if number == 0 {

crates/libzkp_c/src/lib.rs

@@ -204,8 +204,7 @@ pub unsafe extern "C" fn gen_universal_task(
                 .as_secs();
             let c_str = unsafe { std::ffi::CStr::from_ptr(fork_name) };
             let filename = format!("/tmp/task_{}_{}.json", c_str.to_str().unwrap(), timestamp);
-            let c_str = unsafe { std::ffi::CStr::from_ptr(task) };
-            if let Err(e) = std::fs::write(&filename, c_str.to_bytes()) {
+            if let Err(e) = std::fs::write(&filename, task_json.as_bytes()) {
                 eprintln!("Failed to write task to file {}: {}", filename, e);
             } else {
                 println!("Dumped failed task to {}", filename);