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.
92 lines
2.9 KiB
Go
92 lines
2.9 KiB
Go
package lnwire
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import (
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"io"
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"github.com/btcsuite/btcd/btcec"
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)
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// RevokeAndAck is sent by either side once a CommitSig message has been
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// received, and validated. This message serves to revoke the prior commitment
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// transaction, which was the most up to date version until a CommitSig message
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// referencing the specified ChannelPoint was received. Additionally, this
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// message also piggyback's the next revocation hash that Alice should use when
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// constructing the Bob's version of the next commitment transaction (which
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// would be done before sending a CommitSig message). This piggybacking allows
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// Alice to send the next CommitSig message modifying Bob's commitment
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// transaction without first asking for a revocation hash initially.
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type RevokeAndAck struct {
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// ChanID uniquely identifies to which currently active channel this
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// RevokeAndAck applies to.
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ChanID ChannelID
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// Revocation is the preimage to the revocation hash of the now prior
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// commitment transaction.
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Revocation [32]byte
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// NextRevocationKey is the next commitment point which should be used
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// for the next commitment transaction the remote peer creates for us.
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// This, in conjunction with revocation base point will be used to
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// create the proper revocation key used within the commitment
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// transaction.
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NextRevocationKey *btcec.PublicKey
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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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// NewRevokeAndAck creates a new RevokeAndAck message.
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func NewRevokeAndAck() *RevokeAndAck {
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return &RevokeAndAck{
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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 RevokeAndAck implements the lnwire.Message
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// interface.
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var _ Message = (*RevokeAndAck)(nil)
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// Decode deserializes a serialized RevokeAndAck 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 *RevokeAndAck) 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.Revocation[:],
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&c.NextRevocationKey,
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&c.ExtraData,
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)
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}
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// Encode serializes the target RevokeAndAck 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 *RevokeAndAck) 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.Revocation[:],
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c.NextRevocationKey,
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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 *RevokeAndAck) MsgType() MessageType {
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return MsgRevokeAndAck
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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 *RevokeAndAck) TargetChanID() ChannelID {
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return c.ChanID
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}
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