lnd/lnwire/update_fee.go

70 lines
1.8 KiB
Go

package lnwire
import (
"io"
"github.com/roasbeef/btcutil"
)
// UpdateFee is the message the channel initiator sends to the other peer if
// the channel commitment fee needs to be updated.
type UpdateFee struct {
// ChanID is the channel that this UpdateFee is meant for.
ChanID ChannelID
// FeePerKw is the fee-per-kw on commit transactions that the sender of
// this message wants to use for this channel.
FeePerKw btcutil.Amount
}
// NewUpdateFee creates a new UpdateFee message.
func NewUpdateFee(chanID ChannelID, feePerKw btcutil.Amount) *UpdateFee {
return &UpdateFee{
ChanID: chanID,
FeePerKw: feePerKw,
}
}
// A compile time check to ensure UpdateFee implements the lnwire.Message
// interface.
var _ Message = (*UpdateFee)(nil)
// Decode deserializes a serialized UpdateFee message stored in the passed
// io.Reader observing the specified protocol version.
//
// This is part of the lnwire.Message interface.
func (c *UpdateFee) Decode(r io.Reader, pver uint32) error {
return readElements(r,
&c.ChanID,
&c.FeePerKw,
)
}
// Encode serializes the target UpdateFee into the passed io.Writer
// observing the protocol version specified.
//
// This is part of the lnwire.Message interface.
func (c *UpdateFee) Encode(w io.Writer, pver uint32) error {
return writeElements(w,
c.ChanID,
c.FeePerKw,
)
}
// MsgType returns the integer uniquely identifying this message type on the
// wire.
//
// This is part of the lnwire.Message interface.
func (c *UpdateFee) MsgType() MessageType {
return MsgUpdateFee
}
// MaxPayloadLength returns the maximum allowed payload size for a UpdateFee
// complete message observing the specified protocol version.
//
// This is part of the lnwire.Message interface.
func (c *UpdateFee) MaxPayloadLength(uint32) uint32 {
// 32 + 8
return 40
}