Find the absent when starting the execution

[jackzhhuang]

Pull request type

Please check the type of change your PR introduces:

• [ ] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] Documentation content changes
• [ ] Other (please describe):

What is the current behavior?

Issue Number: N/A

What is the new behavior?

-

-

Other information

Summary by CodeRabbit

• New Features

  • Improved block synchronization efficiency by streamlining the processing of absent blocks.
  • Enhanced block fetching logic to avoid unnecessary network calls for already present blocks.

• Bug Fixes

  • Simplified the method for finding absent ancestors, improving overall functionality and reliability.

[coderabbitai[bot]]

Walkthrough

The changes in this pull request focus on the BlockCollector and BlockSyncTask structures within the sync/src/tasks/block_sync_task.rs file. The find_absent_ancestor method's return type has been changed from Result<u64> to Result<()>, simplifying its functionality. Additionally, the ensure_dag_parent_blocks_exist method's logic has been modified to remove the count check for absent ancestors. The fetch_blocks method has been updated to prevent redundant network calls by retaining block IDs already present in the local store.

Changes

File Path	Change Summary
sync/src/tasks/block_sync_task.rs	- Updated find_absent_ancestor method return type from Result<u64> to Result<()>.
	- Removed count variable in find_absent_ancestor and simplified its implementation.
	- Modified ensure_dag_parent_blocks_exist to directly call find_absent_ancestor without count check.
	- Updated fetch_blocks to retain block IDs from local store to avoid unnecessary network requests.

Possibly related PRs

• 4199: This PR modifies the logic for processing absent blocks in the same block_sync_task.rs file, specifically addressing how blocks are added to the waiting list, which relates to the changes made in the find_absent_ancestor and fetch_blocks methods in the main PR.

Suggested reviewers

• sanlee42

Poem

🐇 In the code where blocks align,
A simpler path we now define.
Absent counts have hopped away,
Efficiency leads the way!
With each fetch, we save a call,
Syncing blocks, we stand tall!
🌟

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