lnd/lnwire/musig2.go
2023-08-22 16:29:22 -07:00

51 lines
1.3 KiB
Go

package lnwire
import (
"io"
"github.com/btcsuite/btcd/btcec/v2/schnorr/musig2"
"github.com/lightningnetwork/lnd/tlv"
)
const (
// NonceRecordType is the TLV type used to encode a local musig2 nonce.
NonceRecordType tlv.Type = 4
)
// Musig2Nonce represents a musig2 public nonce, which is the concatenation of
// two EC points serialized in compressed format.
type Musig2Nonce [musig2.PubNonceSize]byte
// Record returns a TLV record that can be used to encode/decode the musig2
// nonce from a given TLV stream.
func (m *Musig2Nonce) Record() tlv.Record {
return tlv.MakeStaticRecord(
NonceRecordType, m, musig2.PubNonceSize, nonceTypeEncoder,
nonceTypeDecoder,
)
}
// nonceTypeEncoder is a custom TLV encoder for the Musig2Nonce type.
func nonceTypeEncoder(w io.Writer, val interface{}, buf *[8]byte) error {
if v, ok := val.(*Musig2Nonce); ok {
_, err := w.Write(v[:])
return err
}
return tlv.NewTypeForEncodingErr(val, "lnwire.Musig2Nonce")
}
// nonceTypeDecoder is a custom TLV decoder for the Musig2Nonce record.
func nonceTypeDecoder(r io.Reader, val interface{}, buf *[8]byte,
l uint64) error {
if v, ok := val.(*Musig2Nonce); ok {
_, err := io.ReadFull(r, v[:])
return err
}
return tlv.NewTypeForDecodingErr(
val, "lnwire.Musig2Nonce", l, musig2.PubNonceSize,
)
}