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.
79 lines
2.5 KiB
Go
79 lines
2.5 KiB
Go
package lnwire
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import (
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"io"
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"github.com/btcsuite/btcutil"
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)
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// ClosingSigned is sent by both parties to a channel once the channel is clear
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// of HTLCs, and is primarily concerned with negotiating fees for the close
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// transaction. Each party provides a signature for a transaction with a fee
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// that they believe is fair. The process terminates when both sides agree on
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// the same fee, or when one side force closes the channel.
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//
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// NOTE: The responder is able to send a signature without any additional
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// messages as all transactions are assembled observing BIP 69 which defines a
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// canonical ordering for input/outputs. Therefore, both sides are able to
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// arrive at an identical closure transaction as they know the order of the
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// inputs/outputs.
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type ClosingSigned struct {
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// ChannelID serves to identify which channel is to be closed.
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ChannelID ChannelID
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// FeeSatoshis is the total fee in satoshis that the party to the
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// channel would like to propose for the close transaction.
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FeeSatoshis btcutil.Amount
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// Signature is for the proposed channel close transaction.
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Signature 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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// NewClosingSigned creates a new empty ClosingSigned message.
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func NewClosingSigned(cid ChannelID, fs btcutil.Amount,
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sig Sig) *ClosingSigned {
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return &ClosingSigned{
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ChannelID: cid,
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FeeSatoshis: fs,
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Signature: sig,
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}
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}
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// A compile time check to ensure ClosingSigned implements the lnwire.Message
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// interface.
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var _ Message = (*ClosingSigned)(nil)
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// Decode deserializes a serialized ClosingSigned 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 *ClosingSigned) Decode(r io.Reader, pver uint32) error {
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return ReadElements(
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r, &c.ChannelID, &c.FeeSatoshis, &c.Signature, &c.ExtraData,
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)
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}
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// Encode serializes the target ClosingSigned 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 *ClosingSigned) Encode(w io.Writer, pver uint32) error {
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return WriteElements(
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w, c.ChannelID, c.FeeSatoshis, c.Signature, 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 *ClosingSigned) MsgType() MessageType {
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return MsgClosingSigned
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}
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