75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
package wtwire
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import (
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"io"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/lightningnetwork/lnd/lnwire"
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)
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// Init is the first message sent over the watchtower wire protocol, and
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// specifies connection features bits and level of requiredness maintained by
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// the sending node. The Init message also sends the chain hash identifying the
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// network that the sender is on.
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type Init struct {
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// ConnFeatures are the feature bits being advertised for the duration
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// of a single connection with a peer.
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ConnFeatures *lnwire.RawFeatureVector
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// ChainHash is the genesis hash of the chain that the advertiser claims
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// to be on.
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ChainHash chainhash.Hash
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}
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// NewInitMessage generates a new Init message from a raw connection feature
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// vector and chain hash.
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func NewInitMessage(connFeatures *lnwire.RawFeatureVector,
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chainHash chainhash.Hash) *Init {
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return &Init{
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ConnFeatures: connFeatures,
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ChainHash: chainHash,
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}
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}
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// Encode serializes the target Init into the passed io.Writer observing the
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// protocol version specified.
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//
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// This is part of the wtwire.Message interface.
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func (msg *Init) Encode(w io.Writer, pver uint32) error {
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return WriteElements(w,
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msg.ConnFeatures,
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msg.ChainHash,
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)
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}
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// Decode deserializes a serialized Init message stored in the passed io.Reader
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// observing the specified protocol version.
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//
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// This is part of the wtwire.Message interface.
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func (msg *Init) Decode(r io.Reader, pver uint32) error {
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return ReadElements(r,
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&msg.ConnFeatures,
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&msg.ChainHash,
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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 wtwire.Message interface.
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func (msg *Init) MsgType() MessageType {
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return MsgInit
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}
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// MaxPayloadLength returns the maximum allowed payload size for an Init
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// complete message observing the specified protocol version.
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//
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// This is part of the wtwire.Message interface.
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func (msg *Init) MaxPayloadLength(uint32) uint32 {
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return MaxMessagePayload
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}
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// A compile-time constraint to ensure Init implements the Message interface.
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var _ Message = (*Init)(nil)
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