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https://github.com/lightningnetwork/lnd.git
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7ff04d8bad
Removes the MaxPayloadLength function from the Message interface and checks that each message payload is not greater than MaxMsgBody. Since all messages are now allowed to be 65535 bytes in size, the MaxPayloadLength is no longer needed.
88 lines
2.7 KiB
Go
88 lines
2.7 KiB
Go
package lnwire
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import (
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"io"
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"math"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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)
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// QueryChannelRange is a message sent by a node in order to query the
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// receiving node of the set of open channel they know of with short channel
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// ID's after the specified block height, capped at the number of blocks beyond
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// that block height. This will be used by nodes upon initial connect to
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// synchronize their views of the network.
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type QueryChannelRange struct {
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// ChainHash denotes the target chain that we're trying to synchronize
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// channel graph state for.
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ChainHash chainhash.Hash
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// FirstBlockHeight is the first block in the query range. The
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// responder should send all new short channel IDs from this block
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// until this block plus the specified number of blocks.
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FirstBlockHeight uint32
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// NumBlocks is the number of blocks beyond the first block that short
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// channel ID's should be sent for.
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NumBlocks 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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// NewQueryChannelRange creates a new empty QueryChannelRange message.
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func NewQueryChannelRange() *QueryChannelRange {
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return &QueryChannelRange{}
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}
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// A compile time check to ensure QueryChannelRange implements the
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// lnwire.Message interface.
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var _ Message = (*QueryChannelRange)(nil)
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// Decode deserializes a serialized QueryChannelRange 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 (q *QueryChannelRange) Decode(r io.Reader, pver uint32) error {
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return ReadElements(r,
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q.ChainHash[:],
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&q.FirstBlockHeight,
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&q.NumBlocks,
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&q.ExtraData,
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)
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}
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// Encode serializes the target QueryChannelRange 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 (q *QueryChannelRange) Encode(w io.Writer, pver uint32) error {
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return WriteElements(w,
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q.ChainHash[:],
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q.FirstBlockHeight,
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q.NumBlocks,
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q.ExtraData,
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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 (q *QueryChannelRange) MsgType() MessageType {
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return MsgQueryChannelRange
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}
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// LastBlockHeight returns the last block height covered by the range of a
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// QueryChannelRange message.
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func (q *QueryChannelRange) LastBlockHeight() uint32 {
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// Handle overflows by casting to uint64.
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lastBlockHeight := uint64(q.FirstBlockHeight) + uint64(q.NumBlocks) - 1
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if lastBlockHeight > math.MaxUint32 {
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return math.MaxUint32
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}
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return uint32(lastBlockHeight)
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}
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