package lnwire import ( "io" "github.com/btcsuite/btcd/chaincfg/chainhash" ) // QueryChannelRange is a message sent by a node in order to query the // receiving node of the set of open channel they know of with short channel // ID's after the specified block height, capped at the number of blocks beyond // that block height. This will be used by nodes upon initial connect to // synchronize their views of the network. type QueryChannelRange struct { // ChainHash denotes the target chain that we're trying to synchronize // channel graph state for. ChainHash chainhash.Hash // FirstBlockHeight is the first block in the query range. The // responder should send all new short channel IDs from this block // until this block plus the specified number of blocks. FirstBlockHeight uint32 // NumBlocks is the number of blocks beyond the first block that short // channel ID's should be sent for. NumBlocks uint32 } // NewQueryChannelRange creates a new empty QueryChannelRange message. func NewQueryChannelRange() *QueryChannelRange { return &QueryChannelRange{} } // A compile time check to ensure QueryChannelRange implements the // lnwire.Message interface. var _ Message = (*QueryChannelRange)(nil) // Decode deserializes a serialized QueryChannelRange message stored in the // passed io.Reader observing the specified protocol version. // // This is part of the lnwire.Message interface. func (q *QueryChannelRange) Decode(r io.Reader, pver uint32) error { return readElements(r, q.ChainHash[:], &q.FirstBlockHeight, &q.NumBlocks, ) } // Encode serializes the target QueryChannelRange into the passed io.Writer // observing the protocol version specified. // // This is part of the lnwire.Message interface. func (q *QueryChannelRange) Encode(w io.Writer, pver uint32) error { return writeElements(w, q.ChainHash[:], q.FirstBlockHeight, q.NumBlocks, ) } // MsgType returns the integer uniquely identifying this message type on the // wire. // // This is part of the lnwire.Message interface. func (q *QueryChannelRange) MsgType() MessageType { return MsgQueryChannelRange } // MaxPayloadLength returns the maximum allowed payload size for a // QueryChannelRange complete message observing the specified protocol version. // // This is part of the lnwire.Message interface. func (q *QueryChannelRange) MaxPayloadLength(uint32) uint32 { // 32 + 4 + 4 return 40 }