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

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# Release Notes
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# Backend Enhancements & Optimizations
## Full remote database support
`lnd` now stores [all its data in the same remote/external
database](https://github.com/lightningnetwork/lnd/pull/5484) 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](https://github.com/lightningnetwork/lnd/blob/master/docs/leader_election.md)
for more information.
## RPC Server
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* [Return payment address and add index from
addholdinvoice call](https://github.com/lightningnetwork/lnd/pull/5533).
* [The versions of several gRPC related libraries were bumped and the main
`rpc.proto` was renamed to
`lightning.proto`](https://github.com/lightningnetwork/lnd/pull/5473) 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](https://github.com/lightningnetwork/lnd/pull/5534). 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
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* [A new pre-submit check has been
added](https://github.com/lightningnetwork/lnd/pull/5520) to ensure that all
PRs ([aside from merge
commits](https://github.com/lightningnetwork/lnd/pull/5543)) add an entry in
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the release notes folder that at least links to PR being added.
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* [A new build target itest-race](https://github.com/lightningnetwork/lnd/pull/5542)
to help uncover undetected data races with our itests.
* [The itest error whitelist check was removed to reduce the number of failed
Travis builds](https://github.com/lightningnetwork/lnd/pull/5588).
# Documentation
* [Outdated warning about unsupported pruning was replaced with clarification that LND **does**
support pruning](https://github.com/lightningnetwork/lnd/pull/5553)
* [Clarified 'ErrReservedValueInvalidated' error string](https://github.com/lightningnetwork/lnd/pull/5577)
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.
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# 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](https://github.com/lightningnetwork/lnd/pull/5526).
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# Code Health
## Code cleanup, refactor, typo fixes
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* [Unused error check
removed](https://github.com/lightningnetwork/lnd/pull/5537).
* [Shorten Pull Request check list by referring to the CI checks that are
in place](https://github.com/lightningnetwork/lnd/pull/5545).
* [Added minor fixes to contribution guidelines](https://github.com/lightningnetwork/lnd/pull/5503).
* [Fixed typo in `dest_custom_records` description comment](https://github.com/lightningnetwork/lnd/pull/5541).
* [Bumped version of `github.com/miekg/dns` library to fix a Dependabot
alert](https://github.com/lightningnetwork/lnd/pull/5576).
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* [Fixed timeout flakes in async payment benchmark tests](https://github.com/lightningnetwork/lnd/pull/5579).
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* [Fixed a missing import and git tag in the healthcheck package](https://github.com/lightningnetwork/lnd/pull/5582).
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* [Fixed a data race in payment unit test](https://github.com/lightningnetwork/lnd/pull/5573).
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* [Missing dots in cmd interface](https://github.com/lightningnetwork/lnd/pull/5535).
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## Database
* [Ensure single writer for legacy
code](https://github.com/lightningnetwork/lnd/pull/5547) when using etcd
backend.
* [Optimized payment sequence generation](https://github.com/lightningnetwork/lnd/pull/5514/)
to make LNDs payment throughput (and latency) with better when using etcd.
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## Performance improvements
* [Update MC store in blocks](https://github.com/lightningnetwork/lnd/pull/5515)
to make payment throughput better when using etcd.
# Contributors (Alphabetical Order)
* ErikEk
* Martin Habovstiak
* Zero-1729
* Oliver Gugger
* xanoni
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* Yong Yu