86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
package lnwire
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import "io"
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// OpaqueReason is an opaque encrypted byte slice that encodes the exact
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// failure reason and additional some supplemental data. The contents of this
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// slice can only be decrypted by the sender of the original HTLC.
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type OpaqueReason []byte
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// UpdateFailHTLC is sent by Alice to Bob in order to remove a previously added
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// HTLC. Upon receipt of an UpdateFailHTLC the HTLC should be removed from the
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// next commitment transaction, with the UpdateFailHTLC propagated backwards in
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// the route to fully undo the HTLC.
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type UpdateFailHTLC struct {
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// ChanIDPoint is the particular active channel that this
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// UpdateFailHTLC is bound to.
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ChanID ChannelID
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// ID references which HTLC on the remote node's commitment transaction
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// has timed out.
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ID uint64
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// Reason is an onion-encrypted blob that details why the HTLC was
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// failed. This blob is only fully decryptable by the initiator of the
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// HTLC message.
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Reason OpaqueReason
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}
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// A compile time check to ensure UpdateFailHTLC implements the lnwire.Message
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// interface.
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var _ Message = (*UpdateFailHTLC)(nil)
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// Decode deserializes a serialized UpdateFailHTLC message stored in the passed
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// io.Reader observing the specified protocol version.
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//
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// This is part of the lnwire.Message interface.
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func (c *UpdateFailHTLC) Decode(r io.Reader, pver uint32) error {
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return readElements(r,
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&c.ChanID,
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&c.ID,
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&c.Reason,
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)
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}
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// Encode serializes the target UpdateFailHTLC into the passed io.Writer observing
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// the protocol version specified.
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//
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// This is part of the lnwire.Message interface.
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func (c *UpdateFailHTLC) Encode(w io.Writer, pver uint32) error {
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return writeElements(w,
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c.ChanID,
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c.ID,
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c.Reason,
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)
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}
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// MsgType returns the integer uniquely identifying this message type on the
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// wire.
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//
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// This is part of the lnwire.Message interface.
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func (c *UpdateFailHTLC) MsgType() MessageType {
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return MsgUpdateFailHTLC
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}
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// MaxPayloadLength returns the maximum allowed payload size for an UpdateFailHTLC
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// complete message observing the specified protocol version.
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//
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// This is part of the lnwire.Message interface.
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func (c *UpdateFailHTLC) MaxPayloadLength(uint32) uint32 {
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var length uint32
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// Length of the ChanID
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length += 32
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// Length of the ID
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length += 8
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// Length of the length opaque reason
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length += 2
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// Length of the Reason
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length += 292
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return length
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}
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