//! For a normal node you probably don't need to use anything here, however, if you wish to split a
//! node into an internet-facing route/message socket handling daemon and a separate daemon (or
//! server entirely) which handles only channel-related messages you may wish to implement
-//! ChannelMessageHandler yourself and use it to re-serialize messages and pass them across
+//! [`ChannelMessageHandler`] yourself and use it to re-serialize messages and pass them across
//! daemons/servers.
//!
//! Note that if you go with such an architecture (instead of passing raw socket events to a
//! non-internet-facing system) you trust the frontend internet-facing system to not lie about the
-//! source node_id of the message, however this does allow you to significantly reduce bandwidth
+//! source `node_id` of the message, however this does allow you to significantly reduce bandwidth
//! between the systems as routing messages can represent a significant chunk of bandwidth usage
//! (especially for non-channel-publicly-announcing nodes). As an alternate design which avoids
//! this issue, if you have sufficient bidirectional bandwidth between your systems, you may send
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum DecodeError {
/// A version byte specified something we don't know how to handle.
- /// Includes unknown realm byte in an OnionHopData packet
+ ///
+ /// Includes unknown realm byte in an onion hop data packet.
UnknownVersion,
- /// Unknown feature mandating we fail to parse message (eg TLV with an even, unknown type)
+ /// Unknown feature mandating we fail to parse message (e.g., TLV with an even, unknown type)
UnknownRequiredFeature,
- /// Value was invalid, eg a byte which was supposed to be a bool was something other than a 0
+ /// Value was invalid.
+ ///
+ /// For example, a byte which was supposed to be a bool was something other than a 0
/// or 1, a public key/private key/signature was invalid, text wasn't UTF-8, TLV was
- /// syntactically incorrect, etc
+ /// syntactically incorrect, etc.
InvalidValue,
- /// Buffer too short
+ /// The buffer to be read was too short.
ShortRead,
- /// A length descriptor in the packet didn't describe the later data correctly
+ /// A length descriptor in the packet didn't describe the later data correctly.
BadLengthDescriptor,
- /// Error from std::io
+ /// Error from [`std::io`].
Io(io::ErrorKind),
/// The message included zlib-compressed values, which we don't support.
UnsupportedCompression,
}
-/// An init message to be sent or received from a peer
+/// An [`init`] message to be sent to or received from a peer.
+///
+/// [`init`]: https://github.com/lightning/bolts/blob/master/01-messaging.md#the-init-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Init {
- /// The relevant features which the sender supports
+ /// The relevant features which the sender supports.
pub features: InitFeatures,
- /// The receipient's network address. This adds the option to report a remote IP address
- /// back to a connecting peer using the init message. A node can decide to use that information
- /// to discover a potential update to its public IPv4 address (NAT) and use
- /// that for a node_announcement update message containing the new address.
+ /// The receipient's network address.
+ ///
+ /// This adds the option to report a remote IP address back to a connecting peer using the init
+ /// message. A node can decide to use that information to discover a potential update to its
+ /// public IPv4 address (NAT) and use that for a [`NodeAnnouncement`] update message containing
+ /// the new address.
pub remote_network_address: Option<NetAddress>,
}
-/// An error message to be sent or received from a peer
+/// An [`error`] message to be sent to or received from a peer.
+///
+/// [`error`]: https://github.com/lightning/bolts/blob/master/01-messaging.md#the-error-and-warning-messages
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct ErrorMessage {
/// The channel ID involved in the error.
/// with the sending peer should be closed.
pub channel_id: [u8; 32],
/// A possibly human-readable error description.
- /// The string should be sanitized before it is used (e.g. emitted to logs or printed to
- /// stdout). Otherwise, a well crafted error message may trigger a security vulnerability in
+ ///
+ /// The string should be sanitized before it is used (e.g., emitted to logs or printed to
+ /// `stdout`). Otherwise, a well crafted error message may trigger a security vulnerability in
/// the terminal emulator or the logging subsystem.
pub data: String,
}
-/// A warning message to be sent or received from a peer
+/// A [`warning`] message to be sent to or received from a peer.
+///
+/// [`warning`]: https://github.com/lightning/bolts/blob/master/01-messaging.md#the-error-and-warning-messages
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct WarningMessage {
/// The channel ID involved in the warning.
/// All-0s indicates a warning unrelated to a specific channel.
pub channel_id: [u8; 32],
/// A possibly human-readable warning description.
+ ///
/// The string should be sanitized before it is used (e.g. emitted to logs or printed to
/// stdout). Otherwise, a well crafted error message may trigger a security vulnerability in
/// the terminal emulator or the logging subsystem.
pub data: String,
}
-/// A ping message to be sent or received from a peer
+/// A [`ping`] message to be sent to or received from a peer.
+///
+/// [`ping`]: https://github.com/lightning/bolts/blob/master/01-messaging.md#the-ping-and-pong-messages
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Ping {
- /// The desired response length
+ /// The desired response length.
pub ponglen: u16,
/// The ping packet size.
+ ///
/// This field is not sent on the wire. byteslen zeros are sent.
pub byteslen: u16,
}
-/// A pong message to be sent or received from a peer
+/// A [`pong`] message to be sent to or received from a peer.
+///
+/// [`pong`]: https://github.com/lightning/bolts/blob/master/01-messaging.md#the-ping-and-pong-messages
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Pong {
/// The pong packet size.
+ ///
/// This field is not sent on the wire. byteslen zeros are sent.
pub byteslen: u16,
}
-/// An open_channel message to be sent or received from a peer
+/// An [`open_channel`] message to be sent to or received from a peer.
+///
+/// [`open_channel`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#the-open_channel-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct OpenChannel {
/// The genesis hash of the blockchain where the channel is to be opened
pub channel_reserve_satoshis: u64,
/// The minimum HTLC size incoming to sender, in milli-satoshi
pub htlc_minimum_msat: u64,
- /// The feerate per 1000-weight of sender generated transactions, until updated by update_fee
+ /// The feerate per 1000-weight of sender generated transactions, until updated by
+ /// [`UpdateFee`]
pub feerate_per_kw: u32,
- /// The number of blocks which the counterparty will have to wait to claim on-chain funds if they broadcast a commitment transaction
+ /// The number of blocks which the counterparty will have to wait to claim on-chain funds if
+ /// they broadcast a commitment transaction
pub to_self_delay: u16,
/// The maximum number of inbound HTLCs towards sender
pub max_accepted_htlcs: u16,
pub htlc_basepoint: PublicKey,
/// The first to-be-broadcast-by-sender transaction's per commitment point
pub first_per_commitment_point: PublicKey,
- /// Channel flags
+ /// The channel flags to be used
pub channel_flags: u8,
- /// Optionally, a request to pre-set the to-sender output's scriptPubkey for when we collaboratively close
+ /// Optionally, a request to pre-set the to-sender output's `scriptPubkey` for when we collaboratively close
pub shutdown_scriptpubkey: OptionalField<Script>,
- /// The channel type that this channel will represent. If none is set, we derive the channel
- /// type from the intersection of our feature bits with our counterparty's feature bits from
- /// the Init message.
+ /// The channel type that this channel will represent
+ ///
+ /// If this is `None`, we derive the channel type from the intersection of our
+ /// feature bits with our counterparty's feature bits from the [`Init`] message.
pub channel_type: Option<ChannelTypeFeatures>,
}
-/// An accept_channel message to be sent or received from a peer
+/// An [`accept_channel`] message to be sent to or received from a peer.
+///
+/// [`accept_channel`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#the-accept_channel-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct AcceptChannel {
/// A temporary channel ID, until the funding outpoint is announced
pub first_per_commitment_point: PublicKey,
/// Optionally, a request to pre-set the to-sender output's scriptPubkey for when we collaboratively close
pub shutdown_scriptpubkey: OptionalField<Script>,
- /// The channel type that this channel will represent. If none is set, we derive the channel
- /// type from the intersection of our feature bits with our counterparty's feature bits from
- /// the Init message.
+ /// The channel type that this channel will represent.
///
+ /// If this is `None`, we derive the channel type from the intersection of
+ /// our feature bits with our counterparty's feature bits from the [`Init`] message.
/// This is required to match the equivalent field in [`OpenChannel::channel_type`].
pub channel_type: Option<ChannelTypeFeatures>,
}
-/// A funding_created message to be sent or received from a peer
+/// A [`funding_created`] message to be sent to or received from a peer.
+///
+/// [`funding_created`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#the-funding_created-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct FundingCreated {
/// A temporary channel ID, until the funding is established
pub signature: Signature,
}
-/// A funding_signed message to be sent or received from a peer
+/// A [`funding_signed`] message to be sent to or received from a peer.
+///
+/// [`funding_signed`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#the-funding_signed-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct FundingSigned {
/// The channel ID
pub signature: Signature,
}
-/// A channel_ready message to be sent or received from a peer
+/// A [`channel_ready`] message to be sent to or received from a peer.
+///
+/// [`channel_ready`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#the-channel_ready-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct ChannelReady {
/// The channel ID
pub channel_id: [u8; 32],
/// The per-commitment point of the second commitment transaction
pub next_per_commitment_point: PublicKey,
- /// If set, provides a short_channel_id alias for this channel. The sender will accept payments
- /// to be forwarded over this SCID and forward them to this messages' recipient.
+ /// If set, provides a `short_channel_id` alias for this channel.
+ ///
+ /// The sender will accept payments to be forwarded over this SCID and forward them to this
+ /// messages' recipient.
pub short_channel_id_alias: Option<u64>,
}
-/// A shutdown message to be sent or received from a peer
+/// A [`shutdown`] message to be sent to or received from a peer.
+///
+/// [`shutdown`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#closing-initiation-shutdown
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Shutdown {
/// The channel ID
pub channel_id: [u8; 32],
/// The destination of this peer's funds on closing.
- /// Must be in one of these forms: p2pkh, p2sh, p2wpkh, p2wsh.
+ ///
+ /// Must be in one of these forms: P2PKH, P2SH, P2WPKH, P2WSH, P2TR.
pub scriptpubkey: Script,
}
/// The minimum and maximum fees which the sender is willing to place on the closing transaction.
+///
/// This is provided in [`ClosingSigned`] by both sides to indicate the fee range they are willing
/// to use.
#[derive(Clone, Debug, PartialEq, Eq)]
pub max_fee_satoshis: u64,
}
-/// A closing_signed message to be sent or received from a peer
+/// A [`closing_signed`] message to be sent to or received from a peer.
+///
+/// [`closing_signed`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#closing-negotiation-closing_signed
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct ClosingSigned {
/// The channel ID
pub fee_range: Option<ClosingSignedFeeRange>,
}
-/// An update_add_htlc message to be sent or received from a peer
+/// An [`update_add_htlc`] message to be sent to or received from a peer.
+///
+/// [`update_add_htlc`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#adding-an-htlc-update_add_htlc
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct UpdateAddHTLC {
/// The channel ID
pub(crate) onion_routing_packet: OnionPacket,
}
- /// An onion message to be sent or received from a peer
+ /// An onion message to be sent to or received from a peer.
+ ///
+ // TODO: update with link to OM when they are merged into the BOLTs
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct OnionMessage {
/// Used in decrypting the onion packet's payload.
pub(crate) onion_routing_packet: onion_message::Packet,
}
-/// An update_fulfill_htlc message to be sent or received from a peer
+/// An [`update_fulfill_htlc`] message to be sent to or received from a peer.
+///
+/// [`update_fulfill_htlc`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#removing-an-htlc-update_fulfill_htlc-update_fail_htlc-and-update_fail_malformed_htlc
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct UpdateFulfillHTLC {
/// The channel ID
pub payment_preimage: PaymentPreimage,
}
-/// An update_fail_htlc message to be sent or received from a peer
+/// An [`update_fail_htlc`] message to be sent to or received from a peer.
+///
+/// [`update_fail_htlc`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#removing-an-htlc-update_fulfill_htlc-update_fail_htlc-and-update_fail_malformed_htlc
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct UpdateFailHTLC {
/// The channel ID
pub(crate) reason: OnionErrorPacket,
}
-/// An update_fail_malformed_htlc message to be sent or received from a peer
+/// An [`update_fail_malformed_htlc`] message to be sent to or received from a peer.
+///
+/// [`update_fail_malformed_htlc`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#removing-an-htlc-update_fulfill_htlc-update_fail_htlc-and-update_fail_malformed_htlc
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct UpdateFailMalformedHTLC {
/// The channel ID
pub failure_code: u16,
}
-/// A commitment_signed message to be sent or received from a peer
+/// A [`commitment_signed`] message to be sent to or received from a peer.
+///
+/// [`commitment_signed`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#committing-updates-so-far-commitment_signed
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct CommitmentSigned {
/// The channel ID
pub htlc_signatures: Vec<Signature>,
}
-/// A revoke_and_ack message to be sent or received from a peer
+/// A [`revoke_and_ack`] message to be sent to or received from a peer.
+///
+/// [`revoke_and_ack`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#completing-the-transition-to-the-updated-state-revoke_and_ack
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct RevokeAndACK {
/// The channel ID
pub next_per_commitment_point: PublicKey,
}
-/// An update_fee message to be sent or received from a peer
+/// An [`update_fee`] message to be sent to or received from a peer
+///
+/// [`update_fee`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#updating-fees-update_fee
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct UpdateFee {
/// The channel ID
#[derive(Clone, Debug, PartialEq, Eq)]
/// Proof that the sender knows the per-commitment secret of the previous commitment transaction.
+///
/// This is used to convince the recipient that the channel is at a certain commitment
-/// number even if they lost that data due to a local failure. Of course, the peer may lie
+/// number even if they lost that data due to a local failure. Of course, the peer may lie
/// and even later commitments may have been revoked.
pub struct DataLossProtect {
/// Proof that the sender knows the per-commitment secret of a specific commitment transaction
pub my_current_per_commitment_point: PublicKey,
}
-/// A channel_reestablish message to be sent or received from a peer
+/// A [`channel_reestablish`] message to be sent to or received from a peer.
+///
+/// [`channel_reestablish`]: https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#message-retransmission
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct ChannelReestablish {
/// The channel ID
pub data_loss_protect: OptionalField<DataLossProtect>,
}
-/// An announcement_signatures message to be sent or received from a peer
+/// An [`announcement_signatures`] message to be sent to or received from a peer.
+///
+/// [`announcement_signatures`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-announcement_signatures-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct AnnouncementSignatures {
/// The channel ID
pub bitcoin_signature: Signature,
}
-/// An address which can be used to connect to a remote peer
+/// An address which can be used to connect to a remote peer.
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum NetAddress {
/// An IPv4 address/port on which the peer is listening.
/// addresses. Thus, the details are not parsed here.
OnionV2([u8; 12]),
/// A new-style Tor onion address/port on which the peer is listening.
- /// To create the human-readable "hostname", concatenate ed25519_pubkey, checksum, and version,
+ ///
+ /// To create the human-readable "hostname", concatenate the ED25519 pubkey, checksum, and version,
/// wrap as base32 and append ".onion".
OnionV3 {
/// The ed25519 long-term public key of the peer
},
}
impl NetAddress {
- /// Gets the ID of this address type. Addresses in node_announcement messages should be sorted
+ /// Gets the ID of this address type. Addresses in [`NodeAnnouncement`] messages should be sorted
/// by this.
pub(crate) fn get_id(&self) -> u8 {
match self {
}
-/// The unsigned part of a node_announcement
+/// The unsigned part of a [`node_announcement`] message.
+///
+/// [`node_announcement`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-node_announcement-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct UnsignedNodeAnnouncement {
/// The advertised features
pub features: NodeFeatures,
/// A strictly monotonic announcement counter, with gaps allowed
pub timestamp: u32,
- /// The node_id this announcement originated from (don't rebroadcast the node_announcement back
+ /// The `node_id` this announcement originated from (don't rebroadcast the `node_announcement` back
/// to this node).
pub node_id: PublicKey,
/// An RGB color for UI purposes
pub rgb: [u8; 3],
- /// An alias, for UI purposes. This should be sanitized before use. There is no guarantee
- /// of uniqueness.
+ /// An alias, for UI purposes.
+ ///
+ /// This should be sanitized before use. There is no guarantee of uniqueness.
pub alias: [u8; 32],
/// List of addresses on which this node is reachable
pub addresses: Vec<NetAddress>,
pub(crate) excess_data: Vec<u8>,
}
#[derive(Clone, Debug, PartialEq, Eq)]
-/// A node_announcement message to be sent or received from a peer
+/// A [`node_announcement`] message to be sent to or received from a peer.
+///
+/// [`node_announcement`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-node_announcement-message
pub struct NodeAnnouncement {
/// The signature by the node key
pub signature: Signature,
pub contents: UnsignedNodeAnnouncement,
}
-/// The unsigned part of a channel_announcement
+/// The unsigned part of a [`channel_announcement`] message.
+///
+/// [`channel_announcement`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-channel_announcement-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct UnsignedChannelAnnouncement {
/// The advertised channel features
pub chain_hash: BlockHash,
/// The short channel ID
pub short_channel_id: u64,
- /// One of the two node_ids which are endpoints of this channel
+ /// One of the two `node_id`s which are endpoints of this channel
pub node_id_1: PublicKey,
- /// The other of the two node_ids which are endpoints of this channel
+ /// The other of the two `node_id`s which are endpoints of this channel
pub node_id_2: PublicKey,
/// The funding key for the first node
pub bitcoin_key_1: PublicKey,
pub bitcoin_key_2: PublicKey,
pub(crate) excess_data: Vec<u8>,
}
-/// A channel_announcement message to be sent or received from a peer
+/// A [`channel_announcement`] message to be sent to or received from a peer.
+///
+/// [`channel_announcement`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-channel_announcement-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct ChannelAnnouncement {
/// Authentication of the announcement by the first public node
pub contents: UnsignedChannelAnnouncement,
}
-/// The unsigned part of a channel_update
+/// The unsigned part of a [`channel_update`] message.
+///
+/// [`channel_update`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-channel_update-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct UnsignedChannelUpdate {
/// The genesis hash of the blockchain where the channel is to be opened
pub flags: u8,
/// The number of blocks such that if:
/// `incoming_htlc.cltv_expiry < outgoing_htlc.cltv_expiry + cltv_expiry_delta`
- /// then we need to fail the HTLC backwards. When forwarding an HTLC, cltv_expiry_delta determines
- /// the outgoing HTLC's minimum cltv_expiry value -- so, if an incoming HTLC comes in with a
- /// cltv_expiry of 100000, and the node we're forwarding to has a cltv_expiry_delta value of 10,
- /// then we'll check that the outgoing HTLC's cltv_expiry value is at least 100010 before
+ /// then we need to fail the HTLC backwards. When forwarding an HTLC, `cltv_expiry_delta` determines
+ /// the outgoing HTLC's minimum `cltv_expiry` value -- so, if an incoming HTLC comes in with a
+ /// `cltv_expiry` of 100000, and the node we're forwarding to has a `cltv_expiry_delta` value of 10,
+ /// then we'll check that the outgoing HTLC's `cltv_expiry` value is at least 100010 before
/// forwarding. Note that the HTLC sender is the one who originally sets this value when
/// constructing the route.
pub cltv_expiry_delta: u16,
/// The minimum HTLC size incoming to sender, in milli-satoshi
pub htlc_minimum_msat: u64,
- /// The maximum HTLC value incoming to sender, in milli-satoshi. Used to be optional.
+ /// The maximum HTLC value incoming to sender, in milli-satoshi.
+ ///
+ /// This used to be optional.
pub htlc_maximum_msat: u64,
/// The base HTLC fee charged by sender, in milli-satoshi
pub fee_base_msat: u32,
/// The amount to fee multiplier, in micro-satoshi
pub fee_proportional_millionths: u32,
/// Excess data which was signed as a part of the message which we do not (yet) understand how
- /// to decode. This is stored to ensure forward-compatibility as new fields are added to the
- /// lightning gossip
+ /// to decode.
+ ///
+ /// This is stored to ensure forward-compatibility as new fields are added to the lightning gossip protocol.
pub excess_data: Vec<u8>,
}
-/// A channel_update message to be sent or received from a peer
+/// A [`channel_update`] message to be sent to or received from a peer.
+///
+/// [`channel_update`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-channel_update-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct ChannelUpdate {
/// A signature of the channel update
pub contents: UnsignedChannelUpdate,
}
-/// A query_channel_range message is used to query a peer for channel
+/// A [`query_channel_range`] message is used to query a peer for channel
/// UTXOs in a range of blocks. The recipient of a query makes a best
-/// effort to reply to the query using one or more reply_channel_range
+/// effort to reply to the query using one or more [`ReplyChannelRange`]
/// messages.
+///
+/// [`query_channel_range`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-query_channel_range-and-reply_channel_range-messages
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct QueryChannelRange {
/// The genesis hash of the blockchain being queried
pub number_of_blocks: u32,
}
-/// A reply_channel_range message is a reply to a query_channel_range
-/// message. Multiple reply_channel_range messages can be sent in reply
-/// to a single query_channel_range message. The query recipient makes a
+/// A [`reply_channel_range`] message is a reply to a [`QueryChannelRange`]
+/// message.
+///
+/// Multiple `reply_channel_range` messages can be sent in reply
+/// to a single [`QueryChannelRange`] message. The query recipient makes a
/// best effort to respond based on their local network view which may
-/// not be a perfect view of the network. The short_channel_ids in the
-/// reply are encoded. We only support encoding_type=0 uncompressed
-/// serialization and do not support encoding_type=1 zlib serialization.
+/// not be a perfect view of the network. The `short_channel_id`s in the
+/// reply are encoded. We only support `encoding_type=0` uncompressed
+/// serialization and do not support `encoding_type=1` zlib serialization.
+///
+/// [`reply_channel_range`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-query_channel_range-and-reply_channel_range-messages
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct ReplyChannelRange {
/// The genesis hash of the blockchain being queried
pub number_of_blocks: u32,
/// True when this is the final reply for a query
pub sync_complete: bool,
- /// The short_channel_ids in the channel range
+ /// The `short_channel_id`s in the channel range
pub short_channel_ids: Vec<u64>,
}
-/// A query_short_channel_ids message is used to query a peer for
-/// routing gossip messages related to one or more short_channel_ids.
+/// A [`query_short_channel_ids`] message is used to query a peer for
+/// routing gossip messages related to one or more `short_channel_id`s.
+///
/// The query recipient will reply with the latest, if available,
-/// channel_announcement, channel_update and node_announcement messages
-/// it maintains for the requested short_channel_ids followed by a
-/// reply_short_channel_ids_end message. The short_channel_ids sent in
-/// this query are encoded. We only support encoding_type=0 uncompressed
-/// serialization and do not support encoding_type=1 zlib serialization.
+/// [`ChannelAnnouncement`], [`ChannelUpdate`] and [`NodeAnnouncement`] messages
+/// it maintains for the requested `short_channel_id`s followed by a
+/// [`ReplyShortChannelIdsEnd`] message. The `short_channel_id`s sent in
+/// this query are encoded. We only support `encoding_type=0` uncompressed
+/// serialization and do not support `encoding_type=1` zlib serialization.
+///
+/// [`query_short_channel_ids`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-query_short_channel_idsreply_short_channel_ids_end-messages
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct QueryShortChannelIds {
/// The genesis hash of the blockchain being queried
pub short_channel_ids: Vec<u64>,
}
-/// A reply_short_channel_ids_end message is sent as a reply to a
-/// query_short_channel_ids message. The query recipient makes a best
+/// A [`reply_short_channel_ids_end message`] is sent as a reply to a
+/// message. The query recipient makes a best
/// effort to respond based on their local network view which may not be
/// a perfect view of the network.
+///
+/// [`reply_short_channel_ids_end`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-query_short_channel_idsreply_short_channel_ids_end-messages
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct ReplyShortChannelIdsEnd {
/// The genesis hash of the blockchain that was queried
pub chain_hash: BlockHash,
/// Indicates if the query recipient maintains up-to-date channel
- /// information for the chain_hash
+ /// information for the `chain_hash`
pub full_information: bool,
}
-/// A gossip_timestamp_filter message is used by a node to request
+/// A [`gossip_timestamp_filter`] message is used by a node to request
/// gossip relay for messages in the requested time range when the
-/// gossip_queries feature has been negotiated.
+/// `gossip_queries` feature has been negotiated.
+///
+/// [`gossip_timestamp_filter`]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#the-gossip_timestamp_filter-message
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct GossipTimestampFilter {
/// The genesis hash of the blockchain for channel and node information
}
/// Encoding type for data compression of collections in gossip queries.
-/// We do not support encoding_type=1 zlib serialization defined in BOLT #7.
+///
+/// We do not support `encoding_type=1` zlib serialization [defined in BOLT
+/// #7](https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#query-messages).
enum EncodingType {
Uncompressed = 0x00,
}
-/// Used to put an error message in a LightningError
+/// Used to put an error message in a [`LightningError`].
#[derive(Clone, Debug)]
pub enum ErrorAction {
/// The peer took some action which made us think they were useless. Disconnect them.
pub action: ErrorAction,
}
-/// Struct used to return values from revoke_and_ack messages, containing a bunch of commitment
+/// Struct used to return values from [`RevokeAndACK`] messages, containing a bunch of commitment
/// transaction updates if they were pending.
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct CommitmentUpdate {
- /// update_add_htlc messages which should be sent
+ /// `update_add_htlc` messages which should be sent
pub update_add_htlcs: Vec<UpdateAddHTLC>,
- /// update_fulfill_htlc messages which should be sent
+ /// `update_fulfill_htlc` messages which should be sent
pub update_fulfill_htlcs: Vec<UpdateFulfillHTLC>,
- /// update_fail_htlc messages which should be sent
+ /// `update_fail_htlc` messages which should be sent
pub update_fail_htlcs: Vec<UpdateFailHTLC>,
- /// update_fail_malformed_htlc messages which should be sent
+ /// `update_fail_malformed_htlc` messages which should be sent
pub update_fail_malformed_htlcs: Vec<UpdateFailMalformedHTLC>,
- /// An update_fee message which should be sent
+ /// An `update_fee` message which should be sent
pub update_fee: Option<UpdateFee>,
- /// Finally, the commitment_signed message which should be sent
+ /// A `commitment_signed` message which should be sent
pub commitment_signed: CommitmentSigned,
}
/// As we wish to serialize these differently from `Option<T>`s (`Options` get a tag byte, but
/// [`OptionalField`] simply gets `Present` if there are enough bytes to read into it), we have a
/// separate enum type for them.
-/// (C-not exported) due to a free generic in T
+///
+/// (C-not exported) due to a free generic in `T`
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum OptionalField<T> {
/// Optional field is included in message
/// A trait to describe an object which can receive channel messages.
///
-/// Messages MAY be called in parallel when they originate from different their_node_ids, however
-/// they MUST NOT be called in parallel when the two calls have the same their_node_id.
+/// Messages MAY be called in parallel when they originate from different `their_node_ids`, however
+/// they MUST NOT be called in parallel when the two calls have the same `their_node_id`.
pub trait ChannelMessageHandler : MessageSendEventsProvider {
- //Channel init:
- /// Handle an incoming open_channel message from the given peer.
+ // Channel init:
+ /// Handle an incoming `open_channel` message from the given peer.
fn handle_open_channel(&self, their_node_id: &PublicKey, their_features: InitFeatures, msg: &OpenChannel);
- /// Handle an incoming accept_channel message from the given peer.
+ /// Handle an incoming `accept_channel` message from the given peer.
fn handle_accept_channel(&self, their_node_id: &PublicKey, their_features: InitFeatures, msg: &AcceptChannel);
- /// Handle an incoming funding_created message from the given peer.
+ /// Handle an incoming `funding_created` message from the given peer.
fn handle_funding_created(&self, their_node_id: &PublicKey, msg: &FundingCreated);
- /// Handle an incoming funding_signed message from the given peer.
+ /// Handle an incoming `funding_signed` message from the given peer.
fn handle_funding_signed(&self, their_node_id: &PublicKey, msg: &FundingSigned);
- /// Handle an incoming channel_ready message from the given peer.
+ /// Handle an incoming `channel_ready` message from the given peer.
fn handle_channel_ready(&self, their_node_id: &PublicKey, msg: &ChannelReady);
// Channl close:
- /// Handle an incoming shutdown message from the given peer.
+ /// Handle an incoming `shutdown` message from the given peer.
fn handle_shutdown(&self, their_node_id: &PublicKey, their_features: &InitFeatures, msg: &Shutdown);
- /// Handle an incoming closing_signed message from the given peer.
+ /// Handle an incoming `closing_signed` message from the given peer.
fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &ClosingSigned);
// HTLC handling:
- /// Handle an incoming update_add_htlc message from the given peer.
+ /// Handle an incoming `update_add_htlc` message from the given peer.
fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &UpdateAddHTLC);
- /// Handle an incoming update_fulfill_htlc message from the given peer.
+ /// Handle an incoming `update_fulfill_htlc` message from the given peer.
fn handle_update_fulfill_htlc(&self, their_node_id: &PublicKey, msg: &UpdateFulfillHTLC);
- /// Handle an incoming update_fail_htlc message from the given peer.
+ /// Handle an incoming `update_fail_htlc` message from the given peer.
fn handle_update_fail_htlc(&self, their_node_id: &PublicKey, msg: &UpdateFailHTLC);
- /// Handle an incoming update_fail_malformed_htlc message from the given peer.
+ /// Handle an incoming `update_fail_malformed_htlc` message from the given peer.
fn handle_update_fail_malformed_htlc(&self, their_node_id: &PublicKey, msg: &UpdateFailMalformedHTLC);
- /// Handle an incoming commitment_signed message from the given peer.
+ /// Handle an incoming `commitment_signed` message from the given peer.
fn handle_commitment_signed(&self, their_node_id: &PublicKey, msg: &CommitmentSigned);
- /// Handle an incoming revoke_and_ack message from the given peer.
+ /// Handle an incoming `revoke_and_ack` message from the given peer.
fn handle_revoke_and_ack(&self, their_node_id: &PublicKey, msg: &RevokeAndACK);
- /// Handle an incoming update_fee message from the given peer.
+ /// Handle an incoming `update_fee` message from the given peer.
fn handle_update_fee(&self, their_node_id: &PublicKey, msg: &UpdateFee);
// Channel-to-announce:
- /// Handle an incoming announcement_signatures message from the given peer.
+ /// Handle an incoming `announcement_signatures` message from the given peer.
fn handle_announcement_signatures(&self, their_node_id: &PublicKey, msg: &AnnouncementSignatures);
// Connection loss/reestablish:
/// Indicates a connection to the peer failed/an existing connection was lost. If no connection
/// is believed to be possible in the future (eg they're sending us messages we don't
- /// understand or indicate they require unknown feature bits), no_connection_possible is set
+ /// understand or indicate they require unknown feature bits), `no_connection_possible` is set
/// and any outstanding channels should be failed.
///
/// Note that in some rare cases this may be called without a corresponding
/// [`Self::peer_connected`].
fn peer_disconnected(&self, their_node_id: &PublicKey, no_connection_possible: bool);
- /// Handle a peer reconnecting, possibly generating channel_reestablish message(s).
+ /// Handle a peer reconnecting, possibly generating `channel_reestablish` message(s).
///
/// May return an `Err(())` if the features the peer supports are not sufficient to communicate
/// with us. Implementors should be somewhat conservative about doing so, however, as other
/// message handlers may still wish to communicate with this peer.
fn peer_connected(&self, their_node_id: &PublicKey, msg: &Init) -> Result<(), ()>;
- /// Handle an incoming channel_reestablish message from the given peer.
+ /// Handle an incoming `channel_reestablish` message from the given peer.
fn handle_channel_reestablish(&self, their_node_id: &PublicKey, msg: &ChannelReestablish);
- /// Handle an incoming channel update from the given peer.
+ /// Handle an incoming `channel_update` message from the given peer.
fn handle_channel_update(&self, their_node_id: &PublicKey, msg: &ChannelUpdate);
// Error:
- /// Handle an incoming error message from the given peer.
+ /// Handle an incoming `error` message from the given peer.
fn handle_error(&self, their_node_id: &PublicKey, msg: &ErrorMessage);
// Handler information:
///
/// # Implementor DoS Warnings
///
-/// For `gossip_queries` messages there are potential DoS vectors when handling
-/// inbound queries. Implementors using an on-disk network graph should be aware of
+/// For messages enabled with the `gossip_queries` feature there are potential DoS vectors when
+/// handling inbound queries. Implementors using an on-disk network graph should be aware of
/// repeated disk I/O for queries accessing different parts of the network graph.
pub trait RoutingMessageHandler : MessageSendEventsProvider {
- /// Handle an incoming node_announcement message, returning true if it should be forwarded on,
- /// false or returning an Err otherwise.
+ /// Handle an incoming `node_announcement` message, returning `true` if it should be forwarded on,
+ /// `false` or returning an `Err` otherwise.
fn handle_node_announcement(&self, msg: &NodeAnnouncement) -> Result<bool, LightningError>;
- /// Handle a channel_announcement message, returning true if it should be forwarded on, false
- /// or returning an Err otherwise.
+ /// Handle a `channel_announcement` message, returning `true` if it should be forwarded on, `false`
+ /// or returning an `Err` otherwise.
fn handle_channel_announcement(&self, msg: &ChannelAnnouncement) -> Result<bool, LightningError>;
- /// Handle an incoming channel_update message, returning true if it should be forwarded on,
- /// false or returning an Err otherwise.
+ /// Handle an incoming `channel_update` message, returning true if it should be forwarded on,
+ /// `false` or returning an `Err` otherwise.
fn handle_channel_update(&self, msg: &ChannelUpdate) -> Result<bool, LightningError>;
/// Gets channel announcements and updates required to dump our routing table to a remote node,
- /// starting at the short_channel_id indicated by starting_point and including announcements
+ /// starting at the `short_channel_id` indicated by `starting_point` and including announcements
/// for a single channel.
fn get_next_channel_announcement(&self, starting_point: u64) -> Option<(ChannelAnnouncement, Option<ChannelUpdate>, Option<ChannelUpdate>)>;
/// Gets a node announcement required to dump our routing table to a remote node, starting at
/// the node *after* the provided pubkey and including up to one announcement immediately
- /// higher (as defined by <PublicKey as Ord>::cmp) than starting_point.
- /// If None is provided for starting_point, we start at the first node.
+ /// higher (as defined by `<PublicKey as Ord>::cmp`) than `starting_point`.
+ /// If `None` is provided for `starting_point`, we start at the first node.
fn get_next_node_announcement(&self, starting_point: Option<&PublicKey>) -> Option<NodeAnnouncement>;
/// Called when a connection is established with a peer. This can be used to
/// perform routing table synchronization using a strategy defined by the
/// a node has completed its best effort to send us the pertaining routing
/// gossip messages.
fn handle_reply_short_channel_ids_end(&self, their_node_id: &PublicKey, msg: ReplyShortChannelIdsEnd) -> Result<(), LightningError>;
- /// Handles when a peer asks us to send a list of short_channel_ids
+ /// Handles when a peer asks us to send a list of `short_channel_id`s
/// for the requested range of blocks.
fn handle_query_channel_range(&self, their_node_id: &PublicKey, msg: QueryChannelRange) -> Result<(), LightningError>;
/// Handles when a peer asks us to send routing gossip messages for a
- /// list of short_channel_ids.
+ /// list of `short_channel_id`s.
fn handle_query_short_channel_ids(&self, their_node_id: &PublicKey, msg: QueryShortChannelIds) -> Result<(), LightningError>;
// Handler information:
/// A trait to describe an object that can receive onion messages.
pub trait OnionMessageHandler : OnionMessageProvider {
- /// Handle an incoming onion_message message from the given peer.
+ /// Handle an incoming `onion_message` message from the given peer.
fn handle_onion_message(&self, peer_node_id: &PublicKey, msg: &OnionMessage);
/// Called when a connection is established with a peer. Can be used to track which peers
/// advertise onion message support and are online.
#[derive(Clone)]
pub(crate) struct OnionPacket {
pub(crate) version: u8,
- /// In order to ensure we always return an error on Onion decode in compliance with BOLT 4, we
- /// have to deserialize OnionPackets contained in UpdateAddHTLCs even if the ephemeral public
- /// key (here) is bogus, so we hold a Result instead of a PublicKey as we'd like.
+ /// In order to ensure we always return an error on onion decode in compliance with [BOLT
+ /// #4](https://github.com/lightning/bolts/blob/master/04-onion-routing.md), we have to
+ /// deserialize `OnionPacket`s contained in [`UpdateAddHTLC`] messages even if the ephemeral
+ /// public key (here) is bogus, so we hold a [`Result`] instead of a [`PublicKey`] as we'd
+ /// like.
pub(crate) public_key: Result<PublicKey, secp256k1::Error>,
pub(crate) hop_data: [u8; 20*65],
pub(crate) hmac: [u8; 32],
}, {});
impl QueryChannelRange {
- /**
- * Calculates the overflow safe ending block height for the query.
- * Overflow returns `0xffffffff`, otherwise returns `first_blocknum + number_of_blocks`
- */
+ /// Calculates the overflow safe ending block height for the query.
+ ///
+ /// Overflow returns `0xffffffff`, otherwise returns `first_blocknum + number_of_blocks`.
pub fn end_blocknum(&self) -> u32 {
match self.first_blocknum.checked_add(self.number_of_blocks) {
Some(block) => block,
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