lnd/docs/release-notes/release-notes-0.14.0.md

Release Notes

Backend Enhancements & Optimizations

Full remote database support

lnd now stores all its data in the same remote/external database such as etcd instead of only the channel state and wallet data. This makes lnd fully stateless and therefore makes switching over to a new leader instance almost instantaneous. Read the guide on leader election for more information.

RPC Server

• Return payment address and add index from addholdinvoice call.

• The versions of several gRPC related libraries were bumped and the main rpc.proto was renamed to lightning.proto to fix a warning related to protobuf file name collisions.

Security

Admin macaroon permissions

The default file permissions of admin.macaroon were changed from 0600 to 0640. This makes it easier to allow other users to manage LND. This is safe on common Unix systems because they always create a new group for each user.

If you use a strange system or changed group membership of the group running LND you may want to check your system to see if it introduces additional risk for you.

Build System

• A new pre-submit check has been added to ensure that all PRs (aside from merge commits) add an entry in the release notes folder that at least links to PR being added.

• A new build target itest-race to help uncover undetected data races with our itests.

• The itest error whitelist check was removed to reduce the number of failed Travis builds.

Documentation

• Outdated warning about unsupported pruning was replaced with clarification that LND does support pruning

• Clarified 'ErrReservedValueInvalidated' error string to explain that the error is triggered by a transaction that would deplete funds already reserved for potential future anchor channel closings (via CPFP) and that more information (e.g., specific sat amounts) can be found in the debug logs.

Misc

• The direct use of certain syscalls in packages such as bbolt or lnd's own healthcheck package made it impossible to import lnd code as a library into projects that are compiled to WASM binaries. That problem was fixed by guarding those syscalls with build tags.

Code Health

Code cleanup, refactor, typo fixes

• Unused error check removed.

• Shorten Pull Request check list by referring to the CI checks that are in place.

• Added minor fixes to contribution guidelines.

• Fixed typo in dest_custom_records description comment.

• Bumped version of github.com/miekg/dns library to fix a Dependabot alert.

• Fixed timeout flakes in async payment benchmark tests.

• Fixed a missing import and git tag in the healthcheck package.

• Fixed a data race in payment unit test.

• Missing dots in cmd interface.

Database

• Ensure single writer for legacy code when using etcd backend.

• Optimized payment sequence generation to make LNDs payment throughput (and latency) with better when using etcd.

Performance improvements

• Update MC store in blocks to make payment throughput better when using etcd.

Contributors (Alphabetical Order)

• ErikEk
• Martin Habovstiak
• Zero-1729
• Oliver Gugger
• xanoni
• Yong Yu