lnd/docs/release-notes/release-notes-0.21.1.md

Release Notes

• Bug Fixes
• New Features
  • Functional Enhancements
  • RPC Additions
  • lncli Additions
• Improvements
  • Functional Updates
  • RPC Updates
  • lncli Updates
  • Breaking Changes
  • Performance Improvements
  • Deprecations
• Technical and Architectural Updates
  • BOLT Spec Updates
  • Testing
  • Database
  • Code Health
  • Robustness
  • Tooling and Documentation
• Contributors (Alphabetical Order)

Bug Fixes

• Updated the tor module to v1.1.7 so fresh nodes started with --tor.active --tor.v3 create v3 onion services with NEW:ED25519-V3. Previously, the root module still resolved tor v1.1.6, which could default new onion service creation to the retired v2 NEW:RSA1024 key type that modern Tor rejects with 513 Invalid key type.

• Fixed a panic in the DNS fallback SRV lookup, which unconditionally type-asserted each DNS Answer record to *dns.SRV and crashed the daemon when the response contained a non-SRV record. Non-SRV records are now skipped, and an empty LookupHost result for the shim no longer triggers an out-of-bounds index.

• Fixed on-chain forward interceptor settlement after the incoming channel force closes. Held forwards are now tracked as off-chain or on-chain entries, allowing an on-chain re-offer to replace the old off-chain hold so settlement reaches the witness beacon. Go callers of the exported htlcswitch.InterceptedPacket type should use the new Deadline field to distinguish off-chain auto-fail heights from on-chain settlement deadlines, or AutoFailHeight() if they only need the legacy flattened value.

New Features

Functional Enhancements

RPC Additions

lncli Additions

Improvements

Functional Updates

• lnd now validates the CLTV expiry of HTLCs at the final hop. A final HTLC whose CLTV expiry falls outside the node's receive policy is failed back, bringing the final hop in line with the CLTV delta limits already enforced on the forwarding path. As part of this change, the channel policy TimeLockDelta is now validated against LND's supported forwarding bounds: any node that previously set a per-channel TimeLockDelta greater than 2016 (the maximum default value) will now have its UpdateChannelPolicy request rejected, and must lower the value accordingly below the specified maximum.

RPC Updates

lncli Updates

Breaking Changes

Performance Improvements

Deprecations

⚠️ Warning: Deprecated fields in lnrpc.Hop will be removed in release version 0.22

⚠️ Warning: The deprecated fee rate option --sat_per_byte will be removed in release version 0.22

Technical and Architectural Updates

BOLT Spec Updates

Testing

Database

Code Health

Robustness

Tooling and Documentation

Contributors (Alphabetical Order)

• Erick Cestari
• Ziggie