7ff04d8bad
Removes the MaxPayloadLength function from the Message interface and checks that each message payload is not greater than MaxMsgBody. Since all messages are now allowed to be 65535 bytes in size, the MaxPayloadLength is no longer needed.
87 lines
2.5 KiB
Go
87 lines
2.5 KiB
Go
package lnwire
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import (
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"io"
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)
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// UpdateFulfillHTLC is sent by Alice to Bob when she wishes to settle a
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// particular HTLC referenced by its HTLCKey within a specific active channel
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// referenced by ChannelPoint. A subsequent CommitSig message will be sent by
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// Alice to "lock-in" the removal of the specified HTLC, possible containing a
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// batch signature covering several settled HTLC's.
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type UpdateFulfillHTLC struct {
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// ChanID references an active channel which holds the HTLC to be
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// settled.
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ChanID ChannelID
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// ID denotes the exact HTLC stage within the receiving node's
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// commitment transaction to be removed.
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ID uint64
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// PaymentPreimage is the R-value preimage required to fully settle an
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// HTLC.
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PaymentPreimage [32]byte
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// ExtraData is the set of data that was appended to this message to
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// fill out the full maximum transport message size. These fields can
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// be used to specify optional data such as custom TLV fields.
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ExtraData ExtraOpaqueData
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}
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// NewUpdateFulfillHTLC returns a new empty UpdateFulfillHTLC.
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func NewUpdateFulfillHTLC(chanID ChannelID, id uint64,
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preimage [32]byte) *UpdateFulfillHTLC {
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return &UpdateFulfillHTLC{
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ChanID: chanID,
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ID: id,
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PaymentPreimage: preimage,
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}
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}
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// A compile time check to ensure UpdateFulfillHTLC implements the lnwire.Message
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// interface.
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var _ Message = (*UpdateFulfillHTLC)(nil)
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// Decode deserializes a serialized UpdateFulfillHTLC 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 *UpdateFulfillHTLC) 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.PaymentPreimage[:],
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&c.ExtraData,
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)
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}
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// Encode serializes the target UpdateFulfillHTLC into the passed io.Writer
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// 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 *UpdateFulfillHTLC) 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.PaymentPreimage[:],
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c.ExtraData,
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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 *UpdateFulfillHTLC) MsgType() MessageType {
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return MsgUpdateFulfillHTLC
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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 *UpdateFulfillHTLC) TargetChanID() ChannelID {
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return c.ChanID
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}
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