Fiber Dev Log 2025-11-27

[eval-exec]

Updates

Features / Releases

• Multi-hop payment support for CCH (cross-chain hub): feat: multi-hop fiber payments for cch #942

  Enables CCH to process multi-hop payments directly, improving payment flow and consolidating different order types for better consistency and efficiency.

Improvements & Fixes

• Integrated monitoring instrumentation and observability into the large-scale test environment.
• Fixed inconsistent behavior of migration checks across different operating systems: Update check-migrate version #953
• Added pending_tlcs field to rpc list_channels: feat: add pending_tlcs field to rpc list_channels #954
• Enabled three Ractor metrics: Enable ractor metrics #947

In Pipeline

• Auto-Synchronize CCH with Fiber store changes: feat: monitor fiber store changes for cch #950

  Automatically tracks and syncs invoice and payment states in Fiber, handling preimage-based settlement without manual checks.

• Refactoring LND Trackers for CCH:refactor(cch): refactor lnd trackers #948

  Modularizes LND trackers, defines payment/invoice events for CCH, and limits concurrent invoice tracking to streamline monitoring and support future Fiber integration.

• Enforcing invoice status checks before settlement and removing unused invoice attribute: feat: enforce invoice status checks before settlement #961, Ensure add tlc expiry is large than final tlc minimum expiry delta #962

  Validates add_tlc.expiry against final_tlc_minimum_expiry_delta to ensure all MPP (Multipath payment) parts can be settled, sets a default final expiry delta, correctly calculates CCH TLC expiries, and cleans up the unused FinalHtlcTimeout invoice attribute.

• Experimenting with refactoring CCH order lifecycle management using a finite state machine. If the refactoring works, this pattern can also be applied to channel, payment, and TLC lifecycle management.