4226232881
In this commit, we export the ReadElements and WriteElements functions. We do this as exporting these functions makes it possible for outside packages to define serializations which use the BOLT 1.0 wire format.
79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
package lnwire
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import "io"
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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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}
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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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)
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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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)
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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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// MaxPayloadLength returns the maximum allowed payload size for an UpdateFulfillHTLC
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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 *UpdateFulfillHTLC) MaxPayloadLength(uint32) uint32 {
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// 32 + 8 + 32
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return 72
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}
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