rust-lightning/CHANGELOG.md

0.0.100 - WIP

Serialization Compatibility

• HTLCs which were in the process of being claimed on-chain when a pre-0.0.100 ChannelMonitor was serialized may generate PaymentForwarded events with spurious fee_earned_msat values. This only applies to payments which were unresolved at the time of the upgrade.
• 0.0.100 clients with pending PaymentForwarded events at serialization-time will generate serialized ChannelManager objects which 0.0.99 and earlier clients cannot read. The likelihood of this can be reduced by ensuring you process all pending events immediately before serialization (as is done by the lightning-background-processor crate).

0.0.99 - 2021-07-09

API Updates

• lightning_block_sync::poll::Validate is now public, allowing you to implement the lightning_block_sync::poll::Poll trait without lightning_block_sync::poll::ChainPoller (#956).
• lightning::ln::peer_handler::PeerManager no longer requires that no calls are made to referencing the same SocketDescriptor after disconnect_socket returns. This makes the API significantly less deadlock-prone and simplifies SocketDescriptor implementations significantly. The relevant changes have been made to lightning_net_tokio and PeerManager documentation has been substantially rewritten (#957).
• lightning::util::message_signing's sign and verify methods now take secret and public keys by reference instead of value (#974).
• Substantially more information is now exposed about channels in ChannelDetails. See documentation for more info (#984 and #988).
• The latest best block seen is now exposed in ChannelManager::current_best_block and ChannelMonitor::current_best_block (#984).
• Feerates charged when forwarding payments over channels is now set in ChannelConfig::fee_base_msat when the channel is opened. For existing channels, the value is set to the value provided in ChannelManagerReadArgs::default_config::channel_options the first time the ChannelManager is loaded in 0.0.99 (#975).
• We now reject HTLCs which are received to be forwarded over private channels unless UserConfig::accept_forwards_to_priv_channels is set. Note that UserConfig is never serialized and must be provided via ChannelManagerReadArgs::default_config at each start (#975).

Bug Fixes

• We now forward gossip messages to peers instead of only relaying locally-generated gossip or sending gossip messages during initial sync (#948).
• Correctly send channel_update messages to direct peers on private channels (#949). Without this, a private node connected to an LDK node over a private channel cannot receive funds as it does not know which fees the LDK node will charge.
• lightning::ln::channelmanager::ChannelManager no longer expects to be persisted spuriously after we receive a channel_update message about any channel in the routing gossip (#972).
• Asynchronous ChannelMonitor updates (using the ChannelMonitorUpdateErr::TemporaryFailure return variant) no longer cause spurious HTLC forwarding failures (#954).
• Transaction provided via ChannelMonitor::transactions_confirmed after ChannelMonitor::best_block_updated was called for a much later block now trigger all relevant actions as of the later block. Previously some transaction broadcasts or other responses required an additional block be provided via ChannelMonitor::best_block_updated (#970).
• We no longer panic in rare cases when an invoice contained last-hop route hints which were unusable (#958).

Node Compatibility

• We now accept spurious funding_locked messages sent prior to channel_reestablish messages after reconnect. This is a known, long-standing bug in lnd (#966).
• We now set the first_blocknum and number_of_blocks fields in reply_channel_range messages to values which c-lightning versions prior to 0.10 accepted. This avoids spurious force-closes from such nodes (#961).

Serialization Compatibility

• Due to a bug discovered in 0.0.98, if a ChannelManager is serialized on version 0.0.98 while an Event::PaymentSent is pending processing, the ChannelManager will fail to deserialize both on version 0.0.98 and later versions. If you have such a ChannelManager available, a simple patch will allow it to deserialize. Please file an issue if you need assistance (#973).

0.0.98 - 2021-06-11

0.0.98 should be considered a release candidate to the first alpha release of Rust-Lightning and the broader LDK. It represents several years of work designing and fine-tuning a flexible API for integrating lightning into any application. LDK should make it easy to build a lightning node or client which meets specific requirements that other lightning node software cannot. As lightning continues to evolve, and new use-cases for lightning develop, the API of LDK will continue to change and expand. However, starting with version 0.1, objects serialized with prior versions will be readable with the latest LDK. While Rust-Lightning is approaching the 0.1 milestone, language bindings components of LDK available at https://github.com/lightningdevkit are still of varying quality. Some are also approaching an 0.1 release, while others are still much more experimental. Please note that, at 0.0.98, using Rust-Lightning on mainnet is strongly discouraged.