+# 0.0.104 - 2021-12-17
+
+## API Updates
+ * A `PaymentFailed` event is now provided to indicate a payment has failed
+ fully. This event is generated either after
+ `ChannelManager::abandon_payment` is called for a given payment, or the
+ payment times out, and there are no further pending HTLCs for the payment.
+ This event should be used to detect payment failure instead of
+ `PaymentPathFailed::all_paths_failed`, unless no payment retries occur via
+ `ChannelManager::retry_payment` (#1202).
+ * Payment secrets are now generated deterministically using material from
+ the new `KeysInterface::get_inbound_payment_key_material` (#1177).
+ * A `PaymentPathSuccessful` event has been added to ease passing success info
+ to a scorer, along with a `Score::payment_path_successful` method to accept
+ such info (#1178, #1197).
+ * `Score::channel_penalty_msat` has additional arguments describing the
+ channel's capacity and the HTLC amount being sent over the channel (#1166).
+ * A new log level `Gossip` has been added, which is used for verbose
+ information generated during network graph sync. Enabling the
+ `max_level_trace` feature or ignoring `Gossip` log entries reduces log
+ growth during initial start up from many GiB to several MiB (#1145).
+ * The `allow_wallclock_use` feature has been removed in favor of only using
+ the `std` and `no-std` features (#1212).
+ * `NetworkGraph` can now remove channels that we haven't heard updates for in
+ two weeks with `NetworkGraph::remove_stale_channels{,with_time}`. The first
+ is called automatically if a `NetGraphMsgHandler` is passed to
+ `BackgroundProcessor::start` (#1212).
+ * `InvoicePayer::pay_pubkey` was added to enable sending "keysend" payments to
+ supported recipients, using the `InvoicePayer` to handle retires (#1160).
+ * `user_payment_id` has been removed from `PaymentPurpose`, and
+ `ChannelManager::create_inbound_payment{,_for_hash}` (#1180).
+ * Updated documentation for several `ChannelManager` functions to remove stale
+ references to panics which no longer occur (#1201).
+ * The `Score` and `LockableScore` objects have moved into the
+ `routing::scoring` module instead of being in the `routing` module (#1166).
+ * The `Time` parameter to `ScorerWithTime` is no longer longer exposed,
+ instead being fixed based on the `std`/`no-std` feature (#1184).
+ * `ChannelDetails::balance_msat` was added to fetch a channel's balance
+ without subtracting the reserve values, lining up with on-chain claim amounts
+ less on-chain fees (#1203).
+ * An explicit `UserConfig::accept_inbound_channels` flag is now provided,
+ removing the need to set `min_funding_satoshis` to > 21 million BTC (#1173).
+ * Inbound channels that fail to see the funding transaction confirm within
+ 2016 blocks are automatically force-closed with
+ `ClosureReason::FundingTimedOut` (#1083).
+ * We now accept a channel_reserve value of 0 from counterparties, as it is
+ insecure for our counterparty but not us (#1163).
+ * `NetAddress::OnionV2` parsing was removed as version 2 onion services are no
+ longer supported in modern Tor (#1204).
+ * Generation and signing of anchor outputs is now supported in the
+ `KeysInterface`, though no support for them exists in the channel itself (#1176)
+
+## Bug Fixes
+ * Fixed a race condition in `InvoicePayer` where paths may be retried after
+ the retry count has been exceeded. In this case the
+ `Event::PaymentPathFailed::all_paths_failed` field is not a reliable payment
+ failure indicator. There was no acceptable alternative indicator,
+ `Event::PaymentFailed` as been added to provide one (#1202).
+ * Reduced the blocks-before-timeout we expect of outgoing HTLCs before
+ refusing to forward. This check was overly strict and resulted in refusing
+ to forward som HTLCs to a next hop that had a lower security threshold than
+ us (#1119).
+ * LDK no longer attempt to update the channel fee for outbound channels when
+ we cannot afford the new fee. This could have caused force-closure by our
+ channel counterparty (#1054).
+ * Fixed several bugs which may have prevented the reliable broadcast of our
+ own channel announcements and updates (#1169).
+ * Fixed a rare bug which may have resulted in spurious route finding failures
+ when using last-hop hints and MPP with large value payments (#1168).
+ * `KeysManager::spend_spendable_outputs` no longer adds a change output that
+ is below the dust threshold for non-standard change scripts (#1131).
+ * Fixed a minor memory leak when attempting to send a payment that fails due
+ to an error when updating the `ChannelMonitor` (#1143).
+ * Fixed a bug where a `FeeEstimator` that returns values rounded to the next
+ sat/vbyte may result in force-closures (#1208).
+ * Handle MPP timeout HTLC error codes, instead of considering the recipient to
+ have sent an invalid error, removing them from the network graph (#1148)
+
+## Serialization Compatibility
+ * All above new events/fields are ignored by prior clients. All above new
+ events/fields are not present when reading objects serialized by prior
+ versions of the library.
+ * Payment secrets are now generated deterministically. This reduces the memory
+ footprint for inbound payments, however, newly-generated inbound payments
+ using `ChannelManager::create_inbound_payment{,_for_hash}` will not be
+ receivable using versions prior to 0.0.104.
+ `ChannelManager::create_inbound_payment{,_for_hash}_legacy` are provided for
+ backwards compatibility (#1177).
+ * `PaymentPurpose::InvoicePayment::user_payment_id` will be 0 when reading
+ objects written with 0.0.104 when read by 0.0.103 and previous (#1180).
+
+In total, this release features 51 files changed, 5356 insertions, 2238
+deletions in 107 commits from 9 authors, in alphabetical order:
+ * Antoine Riard
+ * Conor Okus
+ * Devrandom
+ * Duncan Dean
+ * Elias Rohrer
+ * Jeffrey Czyz
+ * Ken Sedgwick
+ * Matt Corallo
+ * Valentine Wallace
+
+
# 0.0.103 - 2021-11-02
## API Updates
projects / rust-lightning / blobdiff