Jimmy Chen c2a92f1a8c Maintain peers across all data column subnets (#7915) ...

Closes:
- #7865
- #7855

Changes extracted from earlier PR #7876

This PR fixes two main things with a few other improvements mentioned below:
- Prevent Lighthouse from repeatedly sending `DataColumnByRoot` requests to an unsynced peer, causing lookup sync to get stuck
- Allows Lighthouse to send discovery requests if there isn't enough **synced** peers in the required sampling subnets - this fixes the stuck sync scenario where there isn't enough usable peers in sampling subnet but no discovery is attempted.


  - Make peer discovery queries if custody subnet peer count drops below the minimum threshold
- Update peer pruning logic to prioritise uniform distribution across all data column subnets and avoid pruning sampling peers if the count is below the target threshold (2)
- Check sync status when making discovery requests, to make sure we don't ignore requests if there isn't enough synced peers in the required sampling subnets
- Optimise some of the `PeerDB` functions checking custody peers
- Only send lookup requests to peers that are synced or advanced

2025-09-04 05:36:20 +00:00

..

src

Maintain peers across all data column subnets (#7915)

2025-09-04 05:36:20 +00:00

Cargo.toml

Implement tracing spans for data columm RPC requests and responses (#7831)

2025-08-20 23:35:51 +00:00