INNER CODE UNIT · Go

blindGroupElement

lightningnetwork/lightning-onion · crypto.go:185

func blindGroupElement(hopPubKey *btcec.PublicKey, blindingFactor btcec.ModNScalar) *btcec.PublicKey {
	var hopPubKeyJ btcec.JacobianPoint
	hopPubKey.AsJacobian(&hopPubKeyJ)

	var blindedPoint btcec.JacobianPoint
	btcec.ScalarMultNonConst(
		&blindingFactor, &hopPubKeyJ, &blindedPoint,
	)
	blindedPoint.ToAffine()

	return btcec.NewPublicKey(&blindedPoint.X, &blindedPoint.Y)
}

// blindBaseElement blinds the groups's generator G by performing scalar base
// multiplication using the blindingFactor: blindingFactor * G.
func blindBaseElement(blindingFactor btcec.ModNScalar) *btcec.PublicKey {
	// TODO(roasbeef): remove after btcec version bump to add alias for
	// this method

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