84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
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package lnwire
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import (
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"crypto/sha256"
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"io"
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)
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// UpdateFailMalformedHTLC is sent by either the payment forwarder or by
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// payment receiver to the payment sender in order to notify it that the onion
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// blob can't be parsed. For that reason we send this message instead of
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// obfuscate the onion failure.
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type UpdateFailMalformedHTLC struct {
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// ChanID is the particular active channel that this
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// UpdateFailMalformedHTLC 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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// ShaOnionBlob hash of the onion blob on which can't be parsed by the
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// node in the payment path.
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ShaOnionBlob [sha256.Size]byte
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// FailureCode the exact reason why onion blob haven't been parsed.
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FailureCode FailCode
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}
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// A compile time check to ensure UpdateFailMalformedHTLC implements the
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// lnwire.Message interface.
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var _ Message = (*UpdateFailMalformedHTLC)(nil)
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// Decode deserializes a serialized UpdateFailMalformedHTLC 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 *UpdateFailMalformedHTLC) 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.ShaOnionBlob[:],
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&c.FailureCode,
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)
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}
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// Encode serializes the target UpdateFailMalformedHTLC into the passed
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// io.Writer observing 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 *UpdateFailMalformedHTLC) 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.ShaOnionBlob[:],
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c.FailureCode,
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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 *UpdateFailMalformedHTLC) MsgType() MessageType {
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return MsgUpdateFailMalformedHTLC
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}
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// MaxPayloadLength returns the maximum allowed payload size for a
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// UpdateFailMalformedHTLC complete message observing the specified protocol
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// version.
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//
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// This is part of the lnwire.Message interface.
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func (c *UpdateFailMalformedHTLC) MaxPayloadLength(uint32) uint32 {
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// 32 + 8 + 32 + 2
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return 74
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}
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// TargetChanID returns the channel id of the link for which this message is
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// intended.
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//
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// NOTE: Part of peer.LinkUpdater interface.
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func (c *UpdateFailMalformedHTLC) TargetChanID() ChannelID {
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return c.ChanID
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}
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