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.
96 lines
3.2 KiB
Go
96 lines
3.2 KiB
Go
package lnwire
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import (
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"io"
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)
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// CommitSig is sent by either side to stage any pending HTLC's in the
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// receiver's pending set into a new commitment state. Implicitly, the new
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// commitment transaction constructed which has been signed by CommitSig
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// includes all HTLC's in the remote node's pending set. A CommitSig message
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// may be sent after a series of UpdateAddHTLC/UpdateFulfillHTLC messages in
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// order to batch add several HTLC's with a single signature covering all
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// implicitly accepted HTLC's.
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type CommitSig struct {
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// ChanID uniquely identifies to which currently active channel this
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// CommitSig applies to.
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ChanID ChannelID
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// CommitSig is Alice's signature for Bob's new commitment transaction.
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// Alice is able to send this signature without requesting any
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// additional data due to the piggybacking of Bob's next revocation
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// hash in his prior RevokeAndAck message, as well as the canonical
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// ordering used for all inputs/outputs within commitment transactions.
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// If initiating a new commitment state, this signature should ONLY
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// cover all of the sending party's pending log updates, and the log
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// updates of the remote party that have been ACK'd.
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CommitSig Sig
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// HtlcSigs is a signature for each relevant HTLC output within the
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// created commitment. The order of the signatures is expected to be
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// identical to the placement of the HTLC's within the BIP 69 sorted
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// commitment transaction. For each outgoing HTLC (from the PoV of the
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// sender of this message), a signature for an HTLC timeout transaction
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// should be signed, for each incoming HTLC the HTLC timeout
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// transaction should be signed.
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HtlcSigs []Sig
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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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// NewCommitSig creates a new empty CommitSig message.
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func NewCommitSig() *CommitSig {
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return &CommitSig{
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ExtraData: make([]byte, 0),
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}
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}
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// A compile time check to ensure CommitSig implements the lnwire.Message
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// interface.
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var _ Message = (*CommitSig)(nil)
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// Decode deserializes a serialized CommitSig message stored in the
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// passed 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 *CommitSig) 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.CommitSig,
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&c.HtlcSigs,
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&c.ExtraData,
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)
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}
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// Encode serializes the target CommitSig 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 *CommitSig) 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.CommitSig,
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c.HtlcSigs,
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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 *CommitSig) MsgType() MessageType {
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return MsgCommitSig
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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 *CommitSig) TargetChanID() ChannelID {
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return c.ChanID
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}
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