109 lines
3.0 KiB
Go
109 lines
3.0 KiB
Go
package lnwire
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import (
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"io"
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"github.com/roasbeef/btcd/wire"
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)
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// HTLCSettleRequest 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. The message allows multiple hash preimages to be
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// presented in order to support N-of-M HTLC contracts. A subsequent
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// CommitSignature message will be sent by Alice to "lock-in" the removal of the
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// specified HTLC, possible containing a batch signature covering several settled
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// HTLCs.
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type HTLCSettleRequest struct {
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// ChannelPoint references an active channel which holds the HTLC to be
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// settled.
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ChannelPoint *wire.OutPoint
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// HTLCKey denotes the exact HTLC stage within the receiving node's
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// commitment transaction to be removed.
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// TODO(roasbeef): rename to LogIndex
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HTLCKey HTLCKey
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// RedemptionProofs are the R-value preimages required to fully settle
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// an HTLC. The number of preimages in the slice will depend on the
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// specific ContractType of the referenced HTLC.
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RedemptionProofs [][32]byte
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}
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// NewHTLCSettleRequest returns a new empty HTLCSettleRequest.
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func NewHTLCSettleRequest(chanPoint *wire.OutPoint, key HTLCKey,
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redemptionProofs [][32]byte) *HTLCSettleRequest {
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return &HTLCSettleRequest{
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ChannelPoint: chanPoint,
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HTLCKey: key,
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RedemptionProofs: redemptionProofs,
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}
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}
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// A compile time check to ensure HTLCSettleRequest implements the lnwire.Message
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// interface.
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var _ Message = (*HTLCSettleRequest)(nil)
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// Decode deserializes a serialized HTLCSettleRequest 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 *HTLCSettleRequest) Decode(r io.Reader, pver uint32) error {
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// ChannelPoint(8)
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// HTLCKey(8)
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// RedemptionProofs(N*32)
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err := readElements(r,
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&c.ChannelPoint,
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&c.HTLCKey,
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&c.RedemptionProofs,
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)
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if err != nil {
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return err
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}
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return nil
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}
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// Encode serializes the target HTLCSettleRequest 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 *HTLCSettleRequest) Encode(w io.Writer, pver uint32) error {
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err := writeElements(w,
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c.ChannelPoint,
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c.HTLCKey,
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c.RedemptionProofs,
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)
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if err != nil {
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return err
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}
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return nil
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}
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// Command 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 *HTLCSettleRequest) Command() uint32 {
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return CmdHTLCSettleRequest
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}
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// MaxPayloadLength returns the maximum allowed payload size for a HTLCSettleRequest
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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 *HTLCSettleRequest) MaxPayloadLength(uint32) uint32 {
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// 36 + 8 + (32 * 15)
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return 524
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}
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// Validate performs any necessary sanity checks to ensure all fields present
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// on the HTLCSettleRequest are valid.
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//
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// This is part of the lnwire.Message interface.
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func (c *HTLCSettleRequest) Validate() error {
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// We're good!
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return nil
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}
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