use bitcoin::hashes::{Hash, HashEngine};
use bitcoin::hashes::hmac::{Hmac, HmacEngine};
use bitcoin::hashes::sha256::Hash as Sha256;
use bitcoin::hashes::{Hash, HashEngine};
use bitcoin::hashes::hmac::{Hmac, HmacEngine};
use bitcoin::hashes::sha256::Hash as Sha256;
-use bitcoin::secp256k1::{self, PublicKey, Secp256k1, SecretKey};
+use bitcoin::secp256k1::{self, PublicKey, Secp256k1, SecretKey, Scalar};
msg_blinding_point = PublicKey::from_secret_key(secp_ctx, &msg_blinding_point_priv);
let onion_packet_pubkey_blinding_factor = {
msg_blinding_point = PublicKey::from_secret_key(secp_ctx, &msg_blinding_point_priv);
let onion_packet_pubkey_blinding_factor = {