mirror of
https://github.com/lightningnetwork/lnd.git
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2cf6969dbc
This commit refactors the remaining usage of WriteElements. By replacing the interface types with concrete types for the params used in the methods, most of the encoding of the messages now takes zero heap allocations.
82 lines
2.2 KiB
Go
82 lines
2.2 KiB
Go
package lnwire
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import (
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"bytes"
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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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// 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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// 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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&c.ExtraData,
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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 *bytes.Buffer, pver uint32) error {
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if err := WriteChannelID(w, c.ChanID); err != nil {
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return err
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}
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if err := WriteUint32(w, c.FeePerKw); err != nil {
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return err
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}
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return WriteBytes(w, c.ExtraData)
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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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// 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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