mirror of
https://github.com/lightningnetwork/lnd.git
synced 2024-11-19 09:53:54 +01:00
7569cca19b
To avoid code changing underneath the static migrations, we copy the lnwire dependency in its current form into the migration directory. Ideally the migrations doesn't depend on any code that might change, this takes us a step closer.
90 lines
2.7 KiB
Go
90 lines
2.7 KiB
Go
package lnwire
|
|
|
|
import (
|
|
"io"
|
|
"math"
|
|
|
|
"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
|
|
}
|
|
|
|
// LastBlockHeight returns the last block height covered by the range of a
|
|
// QueryChannelRange message.
|
|
func (q *QueryChannelRange) LastBlockHeight() uint32 {
|
|
// Handle overflows by casting to uint64.
|
|
lastBlockHeight := uint64(q.FirstBlockHeight) + uint64(q.NumBlocks) - 1
|
|
if lastBlockHeight > math.MaxUint32 {
|
|
return math.MaxUint32
|
|
}
|
|
return uint32(lastBlockHeight)
|
|
}
|