//! Events are returned from various bits in the library which indicate some action must be taken
//! by the client.
//!
-//! Because we don't have a built-in runtime, its up to the client to call events at a time in the
+//! Because we don't have a built-in runtime, it's up to the client to call events at a time in the
//! future, as well as generate and broadcast funding transactions handle payment preimages and a
//! few other things.
//!
//TODO: We need better separation of event types ^
use ln::msgs;
+use ln::channelmanager::{PaymentPreimage, PaymentHash};
use chain::transaction::OutPoint;
use chain::keysinterface::SpendableOutputDescriptor;
use secp256k1::key::PublicKey;
-use std::time::Instant;
+use std::time::Duration;
/// An Event which you should probably take some action in response to.
pub enum Event {
- // Events a user will probably have to handle
/// Used to indicate that the client should generate a funding transaction with the given
/// parameters and then call ChannelManager::funding_transaction_generated.
/// Generated in ChannelManager message handling.
+ /// Note that *all inputs* in the funding transaction must spend SegWit outputs or your
+ /// counterparty can steal your funds!
FundingGenerationReady {
/// The random channel_id we picked which you'll need to pass into
/// ChannelManager::funding_transaction_generated.
/// Indicates we've received money! Just gotta dig out that payment preimage and feed it to
/// ChannelManager::claim_funds to get it....
/// Note that if the preimage is not known or the amount paid is incorrect, you must call
- /// ChannelManager::fail_htlc_backwards with PaymentFailReason::PreimageUnknown or
- /// PaymentFailReason::AmountMismatch, respectively, to free up resources for this HTLC.
+ /// ChannelManager::fail_htlc_backwards to free up resources for this HTLC.
/// The amount paid should be considered 'incorrect' when it is less than or more than twice
/// the amount expected.
PaymentReceived {
/// The hash for which the preimage should be handed to the ChannelManager.
- payment_hash: [u8; 32],
- /// The value, in thousandths of a satoshi, that this payment is for.
+ payment_hash: PaymentHash,
+ /// The value, in thousandths of a satoshi, that this payment is for. Note that you must
+ /// compare this to the expected value before accepting the payment (as otherwise you are
+ /// providing proof-of-payment for less than the value you expected!).
amt: u64,
},
/// Indicates an outbound payment we made succeeded (ie it made it all the way to its target
/// The preimage to the hash given to ChannelManager::send_payment.
/// Note that this serves as a payment receipt, if you wish to have such a thing, you must
/// store it somehow!
- payment_preimage: [u8; 32],
+ payment_preimage: PaymentPreimage,
},
/// Indicates an outbound payment we made failed. Probably some intermediary node dropped
/// something. You may wish to retry with a different route.
/// deduplicate them by payment_hash (which MUST be unique)!
PaymentFailed {
/// The hash which was given to ChannelManager::send_payment.
- payment_hash: [u8; 32],
+ payment_hash: PaymentHash,
/// Indicates the payment was rejected for some reason by the recipient. This implies that
/// the payment has failed, not just the route in question. If this is not set, you may
/// retry the payment via a different route.
rejected_by_dest: bool,
+#[cfg(test)]
+ error_code: Option<u16>,
},
/// Used to indicate that ChannelManager::process_pending_htlc_forwards should be called at a
/// time in the future.
PendingHTLCsForwardable {
- /// The earliest time at which process_pending_htlc_forwards should be called.
- time_forwardable: Instant,
+ /// The minimum amount of time that should be waited prior to calling
+ /// process_pending_htlc_forwards. To increase the effort required to correlate payments,
+ /// you should wait a random amount of time in roughly the range (now + time_forwardable,
+ /// now + 5*time_forwardable).
+ time_forwardable: Duration,
},
/// Used to indicate that an output was generated on-chain which you should know how to spend.
/// Such an output will *not* ever be spent by rust-lightning, so you need to store them
/// The outputs which you should store as spendable by you.
outputs: Vec<SpendableOutputDescriptor>,
},
+}
- // Events indicating the network loop should send a message to a peer:
- // TODO: Move these into a separate struct and make a top-level enum
- /// Used to indicate that we've initialted a channel open and should send the open_channel
+/// An event generated by ChannelManager which indicates a message should be sent to a peer (or
+/// broadcast to most peers).
+/// These events are handled by PeerManager::process_events if you are using a PeerManager.
+#[derive(Clone)]
+pub enum MessageSendEvent {
+ /// Used to indicate that we've accepted a channel open and should send the accept_channel
+ /// message provided to the given peer.
+ SendAcceptChannel {
+ /// The node_id of the node which should receive this message
+ node_id: PublicKey,
+ /// The message which should be sent.
+ msg: msgs::AcceptChannel,
+ },
+ /// Used to indicate that we've initiated a channel open and should send the open_channel
/// message provided to the given peer.
- ///
- /// This event is handled by PeerManager::process_events if you are using a PeerManager.
SendOpenChannel {
/// The node_id of the node which should receive this message
node_id: PublicKey,
msg: msgs::OpenChannel,
},
/// Used to indicate that a funding_created message should be sent to the peer with the given node_id.
- ///
- /// This event is handled by PeerManager::process_events if you are using a PeerManager.
SendFundingCreated {
/// The node_id of the node which should receive this message
node_id: PublicKey,
/// The message which should be sent.
msg: msgs::FundingCreated,
},
+ /// Used to indicate that a funding_signed message should be sent to the peer with the given node_id.
+ SendFundingSigned {
+ /// The node_id of the node which should receive this message
+ node_id: PublicKey,
+ /// The message which should be sent.
+ msg: msgs::FundingSigned,
+ },
/// Used to indicate that a funding_locked message should be sent to the peer with the given node_id.
- ///
- /// This event is handled by PeerManager::process_events if you are using a PeerManager.
SendFundingLocked {
/// The node_id of the node which should receive these message(s)
node_id: PublicKey,
/// The funding_locked message which should be sent.
msg: msgs::FundingLocked,
- /// An optional additional announcement_signatures message which should be sent.
- announcement_sigs: Option<msgs::AnnouncementSignatures>,
+ },
+ /// Used to indicate that an announcement_signatures message should be sent to the peer with the given node_id.
+ SendAnnouncementSignatures {
+ /// The node_id of the node which should receive these message(s)
+ node_id: PublicKey,
+ /// The announcement_signatures message which should be sent.
+ msg: msgs::AnnouncementSignatures,
},
/// Used to indicate that a series of HTLC update messages, as well as a commitment_signed
/// message should be sent to the peer with the given node_id.
- ///
- /// This event is handled by PeerManager::process_events if you are using a PeerManager.
UpdateHTLCs {
/// The node_id of the node which should receive these message(s)
node_id: PublicKey,
updates: msgs::CommitmentUpdate,
},
/// Used to indicate that a revoke_and_ack message should be sent to the peer with the given node_id.
- ///
- /// This event is handled by PeerManager::process_events if you are using a PeerManager.
SendRevokeAndACK {
/// The node_id of the node which should receive this message
node_id: PublicKey,
/// The message which should be sent.
msg: msgs::RevokeAndACK,
},
+ /// Used to indicate that a closing_signed message should be sent to the peer with the given node_id.
+ SendClosingSigned {
+ /// The node_id of the node which should receive this message
+ node_id: PublicKey,
+ /// The message which should be sent.
+ msg: msgs::ClosingSigned,
+ },
/// Used to indicate that a shutdown message should be sent to the peer with the given node_id.
- ///
- /// This event is handled by PeerManager::process_events if you are using a PeerManager.
SendShutdown {
/// The node_id of the node which should receive this message
node_id: PublicKey,
/// The message which should be sent.
msg: msgs::Shutdown,
},
+ /// Used to indicate that a channel_reestablish message should be sent to the peer with the given node_id.
+ SendChannelReestablish {
+ /// The node_id of the node which should receive this message
+ node_id: PublicKey,
+ /// The message which should be sent.
+ msg: msgs::ChannelReestablish,
+ },
/// Used to indicate that a channel_announcement and channel_update should be broadcast to all
/// peers (except the peer with node_id either msg.contents.node_id_1 or msg.contents.node_id_2).
- ///
- /// This event is handled by PeerManager::process_events if you are using a PeerManager.
BroadcastChannelAnnouncement {
/// The channel_announcement which should be sent.
msg: msgs::ChannelAnnouncement,
update_msg: msgs::ChannelUpdate,
},
/// Used to indicate that a channel_update should be broadcast to all peers.
- ///
- /// This event is handled by PeerManager::process_events if you are using a PeerManager.
BroadcastChannelUpdate {
/// The channel_update which should be sent.
msg: msgs::ChannelUpdate,
},
-
- //Error handling
/// Broadcast an error downstream to be handled
- ///
- /// This event is handled by PeerManager::process_events if you are using a PeerManager.
HandleError {
/// The node_id of the node which should receive this message
node_id: PublicKey,
/// The action which should be taken.
- action: Option<msgs::ErrorAction>
+ action: msgs::ErrorAction
},
/// When a payment fails we may receive updates back from the hop where it failed. In such
/// cases this event is generated so that we can inform the router of this information.
- ///
- /// This event is handled by PeerManager::process_events if you are using a PeerManager.
PaymentFailureNetworkUpdate {
/// The channel/node update which should be sent to router
update: msgs::HTLCFailChannelUpdate,
}
}
+/// A trait indicating an object may generate message send events
+pub trait MessageSendEventsProvider {
+ /// Gets the list of pending events which were generated by previous actions, clearing the list
+ /// in the process.
+ fn get_and_clear_pending_msg_events(&self) -> Vec<MessageSendEvent>;
+}
+
/// A trait indicating an object may generate events
pub trait EventsProvider {
/// Gets the list of pending events which were generated by previous actions, clearing the list
projects / rust-lightning / blobdiff