79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
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package lnwire
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import (
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"io"
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)
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// UpdateFee is the message the channel initiator sends to the other peer if
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// the channel commitment fee needs to be updated.
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type UpdateFee struct {
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// ChanID is the channel that this UpdateFee is meant for.
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ChanID ChannelID
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// FeePerKw is the fee-per-kw on commit transactions that the sender of
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// this message wants to use for this channel.
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//
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// TODO(halseth): make SatPerKWeight when fee estimation is moved to
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// own package. Currently this will cause an import cycle.
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FeePerKw uint32
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}
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// NewUpdateFee creates a new UpdateFee message.
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func NewUpdateFee(chanID ChannelID, feePerKw uint32) *UpdateFee {
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return &UpdateFee{
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ChanID: chanID,
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FeePerKw: feePerKw,
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}
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}
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// A compile time check to ensure UpdateFee implements the lnwire.Message
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// interface.
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var _ Message = (*UpdateFee)(nil)
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// Decode deserializes a serialized UpdateFee 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 *UpdateFee) 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.FeePerKw,
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)
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}
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// Encode serializes the target UpdateFee 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 *UpdateFee) 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.FeePerKw,
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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 *UpdateFee) MsgType() MessageType {
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return MsgUpdateFee
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}
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// MaxPayloadLength returns the maximum allowed payload size for an UpdateFee
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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 *UpdateFee) MaxPayloadLength(uint32) uint32 {
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// 32 + 4
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return 36
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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 *UpdateFee) TargetChanID() ChannelID {
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return c.ChanID
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}
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