Create nonce generation method on Taproot signer.

Author: arik-so

lightning/src/sign/taproot.rs

@@ -2,14 +2,16 @@ use bitcoin::blockdata::transaction::Transaction;
 use bitcoin::secp256k1;
 use bitcoin::secp256k1::{PublicKey, schnorr::Signature, Secp256k1, SecretKey};
 
-use musig2::types::PartialSignature;
+use musig2::types::{PartialSignature, PublicNonce};
 
 use crate::events::bump_transaction::HTLCDescriptor;
 use crate::ln::chan_utils::{ClosingTransaction, CommitmentTransaction, HolderCommitmentTransaction, HTLCOutputInCommitment};
 use crate::ln::PaymentPreimage;
 use crate::sign::ChannelSigner;
 
-trait TaprootSigner: ChannelSigner {
+pub trait TaprootSigner: ChannelSigner {
+	fn generate_local_nonce_pair(&self, secp_ctx: &Secp256k1<secp256k1::All>) -> PublicNonce;
+
 	/// Create a signature for a counterparty's commitment transaction and associated HTLC transactions.
 	///
 	/// Note that if signing fails or is rejected, the channel will be force-closed.