lnd.xprv/lnwire/update_fail_htlc.go

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package lnwire
import (
"io"
)
// OpaqueReason is an opaque encrypted byte slice that encodes the exact
// failure reason and additional some supplemental data. The contents of this
// slice can only be decrypted by the sender of the original HTLC.
type OpaqueReason []byte
// UpdateFailHTLC is sent by Alice to Bob in order to remove a previously added
// HTLC. Upon receipt of an UpdateFailHTLC the HTLC should be removed from the
// next commitment transaction, with the UpdateFailHTLC propagated backwards in
// the route to fully undo the HTLC.
type UpdateFailHTLC struct {
// ChanIDPoint is the particular active channel that this
// UpdateFailHTLC is bound to.
ChanID ChannelID
// ID references which HTLC on the remote node's commitment transaction
// has timed out.
ID uint64
// Reason is an onion-encrypted blob that details why the HTLC was
// failed. This blob is only fully decryptable by the initiator of the
// HTLC message.
Reason OpaqueReason
// ExtraData is the set of data that was appended to this message to
// fill out the full maximum transport message size. These fields can
// be used to specify optional data such as custom TLV fields.
ExtraData ExtraOpaqueData
}
// A compile time check to ensure UpdateFailHTLC implements the lnwire.Message
// interface.
var _ Message = (*UpdateFailHTLC)(nil)
// Decode deserializes a serialized UpdateFailHTLC message stored in the passed
// io.Reader observing the specified protocol version.
//
// This is part of the lnwire.Message interface.
func (c *UpdateFailHTLC) Decode(r io.Reader, pver uint32) error {
return ReadElements(r,
&c.ChanID,
&c.ID,
&c.Reason,
&c.ExtraData,
)
}
// Encode serializes the target UpdateFailHTLC into the passed io.Writer observing
// the protocol version specified.
//
// This is part of the lnwire.Message interface.
func (c *UpdateFailHTLC) Encode(w io.Writer, pver uint32) error {
return WriteElements(w,
c.ChanID,
c.ID,
c.Reason,
c.ExtraData,
)
}
// MsgType returns the integer uniquely identifying this message type on the
// wire.
//
// This is part of the lnwire.Message interface.
func (c *UpdateFailHTLC) MsgType() MessageType {
return MsgUpdateFailHTLC
}
// TargetChanID returns the channel id of the link for which this message is
// intended.
//
// NOTE: Part of peer.LinkUpdater interface.
func (c *UpdateFailHTLC) TargetChanID() ChannelID {
return c.ChanID
}