Fiber Dev Log 2025-11-13

[mohanson]

Updates

Features

• Multi-Hop Cross Chain Hub (CCH) refactor

  Enabled multi-hop payments and hold-invoice in CCH, along with store-change notifications to support tracking and settlement of payment state transitions.

  • PRs: feat: record and notify store changes #930, feat: multi-hop fiber payments for cch #942, feat: hold invoice #945,

• Liquidity solutions survey for Fiber: Survey Liquidity Solutions for Fiber (Report)

Improvements & Fixes

Performance & robustness

• Improve PR (fiber): Settle payment with invoice in network actor #934
• Verified fix for high CPU usage in large-scale tests (verification complete)

Observability & diagnostics

• Fix negative metrics: Fix negative metrics #946
• Fix flamegraph call stack errors: Fix pprof output incorrect stack calls #939
• Add error tracking with context for P2P TimedOut: https://github.com/jjyr/p2p/tree/error-with-context

Dashboard UX

• Finalized dashboard UI designs of Nodes and Channels pages

In Pipeline

Fiber v0.6 & HTLC

• Preparing v0.6 with pending HTLC RPC for easier testing
• Iterating on single-direction payment channel + HTLC design

Observability

• Expanding observability adding ractor metrics (pending count/schedule)
• Adding task/channel action monitoring metrics

Dashboard

• Progressing from design to implementation (nodes/channels visualization and alerts).

Testing & Research

• Investigating forced shutdown during stress tests
• Expanding Multi-Hop CCH test coverage
• Refine tech specs and product designs for liquidity solutions (Submarine Swap, Liquidity Ads); prototype/PoC next.