81 lines
2.5 KiB
Go
81 lines
2.5 KiB
Go
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package lnwire
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import (
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"io"
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"github.com/roasbeef/btcd/chaincfg/chainhash"
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)
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// GossipTimestampRange is a message that allows the sender to restrict the set
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// of future gossip announcements sent by the receiver. Nodes should send this
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// if they have the gossip-queries feature bit active. Nodes are able to send
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// new GossipTimestampRange messages to replace the prior window.
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type GossipTimestampRange struct {
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// ChainHash denotes the chain that the sender wishes to restrict the
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// set of received announcements of.
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ChainHash chainhash.Hash
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// FirstTimestamp is the timestamp of the earliest announcement message
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// that should be sent by the receiver.
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FirstTimestamp uint32
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// TimestampRange is the horizon beyond the FirstTimestamp that any
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// announcement messages should be sent for. The receiving node MUST
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// NOT send any announcements that have a timestamp greater than
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// FirstTimestamp + TimestampRange.
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TimestampRange uint32
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}
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// NewGossipTimestampRange creates a new empty GossipTimestampRange message.
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func NewGossipTimestampRange() *GossipTimestampRange {
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return &GossipTimestampRange{}
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}
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// A compile time check to ensure GossipTimestampRange implements the
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// lnwire.Message interface.
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var _ Message = (*GossipTimestampRange)(nil)
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// Decode deserializes a serialized GossipTimestampRange 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 (g *GossipTimestampRange) Decode(r io.Reader, pver uint32) error {
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return readElements(r,
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g.ChainHash[:],
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&g.FirstTimestamp,
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&g.TimestampRange,
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)
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}
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// Encode serializes the target GossipTimestampRange 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 (g *GossipTimestampRange) Encode(w io.Writer, pver uint32) error {
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return writeElements(w,
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g.ChainHash[:],
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g.FirstTimestamp,
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g.TimestampRange,
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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 (g *GossipTimestampRange) MsgType() MessageType {
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return MsgGossipTimestampRange
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}
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// MaxPayloadLength returns the maximum allowed payload size for a
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// GossipTimestampRange complete message observing the specified protocol
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// version.
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//
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// This is part of the lnwire.Message interface.
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func (c *GossipTimestampRange) MaxPayloadLength(uint32) uint32 {
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// 32 + 4 + 4
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//
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// TODO(roasbeef): update to 8 byte timestmaps?
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return 40
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}
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