Remove NodeSigner::sign_bolt12_invoice_request

Now that invoice requests are signed using transient keys only, remove
the corresponding signing method from NodeSigner since it is never used.

Author: jkczyz

fuzz/src/chanmon_consistency.rs

@@ -58,7 +58,6 @@ use lightning::ln::msgs::{
 use lightning::ln::script::ShutdownScript;
 use lightning::ln::{ChannelId, PaymentHash, PaymentPreimage, PaymentSecret};
 use lightning::offers::invoice::{BlindedPayInfo, UnsignedBolt12Invoice};
-use lightning::offers::invoice_request::UnsignedInvoiceRequest;
 use lightning::onion_message::messenger::{Destination, MessageRouter, OnionMessagePath};
 use lightning::routing::router::{InFlightHtlcs, Path, Route, RouteHop, RouteParameters, Router};
 use lightning::sign::{
@@ -337,12 +336,6 @@ impl NodeSigner for KeyProvider {
 		unreachable!()
 	}
 
-	fn sign_bolt12_invoice_request(
-		&self, _invoice_request: &UnsignedInvoiceRequest,
-	) -> Result<schnorr::Signature, ()> {
-		unreachable!()
-	}
-
 	fn sign_bolt12_invoice(
 		&self, _invoice: &UnsignedBolt12Invoice,
 	) -> Result<schnorr::Signature, ()> {

fuzz/src/full_stack.rs

@@ -51,7 +51,6 @@ use lightning::ln::peer_handler::{
 use lightning::ln::script::ShutdownScript;
 use lightning::ln::{ChannelId, PaymentHash, PaymentPreimage, PaymentSecret};
 use lightning::offers::invoice::{BlindedPayInfo, UnsignedBolt12Invoice};
-use lightning::offers::invoice_request::UnsignedInvoiceRequest;
 use lightning::onion_message::messenger::{Destination, MessageRouter, OnionMessagePath};
 use lightning::routing::gossip::{NetworkGraph, P2PGossipSync};
 use lightning::routing::router::{
@@ -411,12 +410,6 @@ impl NodeSigner for KeyProvider {
 		unreachable!()
 	}
 
-	fn sign_bolt12_invoice_request(
-		&self, _invoice_request: &UnsignedInvoiceRequest,
-	) -> Result<schnorr::Signature, ()> {
-		unreachable!()
-	}
-
 	fn sign_bolt12_invoice(
 		&self, _invoice: &UnsignedBolt12Invoice,
 	) -> Result<schnorr::Signature, ()> {

fuzz/src/onion_message.rs

@@ -12,7 +12,6 @@ use lightning::ln::features::InitFeatures;
 use lightning::ln::msgs::{self, DecodeError, OnionMessageHandler};
 use lightning::ln::script::ShutdownScript;
 use lightning::offers::invoice::UnsignedBolt12Invoice;
-use lightning::offers::invoice_request::UnsignedInvoiceRequest;
 use lightning::onion_message::async_payments::{
 	AsyncPaymentsMessageHandler, HeldHtlcAvailable, ReleaseHeldHtlc,
 };
@@ -230,12 +229,6 @@ impl NodeSigner for KeyProvider {
 		unreachable!()
 	}
 
-	fn sign_bolt12_invoice_request(
-		&self, _invoice_request: &UnsignedInvoiceRequest,
-	) -> Result<schnorr::Signature, ()> {
-		unreachable!()
-	}
-
 	fn sign_bolt12_invoice(
 		&self, _invoice: &UnsignedBolt12Invoice,
 	) -> Result<schnorr::Signature, ()> {

lightning/src/sign/mod.rs

@@ -56,7 +56,6 @@ use crate::ln::msgs::{UnsignedChannelAnnouncement, UnsignedGossipMessage};
 use crate::ln::script::ShutdownScript;
 use crate::ln::types::PaymentPreimage;
 use crate::offers::invoice::UnsignedBolt12Invoice;
-use crate::offers::invoice_request::UnsignedInvoiceRequest;
 use crate::util::ser::{Readable, ReadableArgs, Writeable, Writer};
 use crate::util::transaction_utils;
 
@@ -870,21 +869,6 @@ pub trait NodeSigner {
 		&self, hrp_bytes: &[u8], invoice_data: &[u5], recipient: Recipient,
 	) -> Result<RecoverableSignature, ()>;
 
-	/// Signs the [`TaggedHash`] of a BOLT 12 invoice request.
-	///
-	/// May be called by a function passed to [`UnsignedInvoiceRequest::sign`] where
-	/// `invoice_request` is the callee.
-	///
-	/// Implementors may check that the `invoice_request` is expected rather than blindly signing
-	/// the tagged hash. An `Ok` result should sign `invoice_request.tagged_hash().as_digest()` with
-	/// the node's signing key or an ephemeral key to preserve privacy, whichever is associated with
-	/// [`UnsignedInvoiceRequest::payer_signing_pubkey`].
-	///
-	/// [`TaggedHash`]: crate::offers::merkle::TaggedHash
-	fn sign_bolt12_invoice_request(
-		&self, invoice_request: &UnsignedInvoiceRequest,
-	) -> Result<schnorr::Signature, ()>;
-
 	/// Signs the [`TaggedHash`] of a BOLT 12 invoice.
 	///
 	/// May be called by a function passed to [`UnsignedBolt12Invoice::sign`] where `invoice` is the
@@ -2187,15 +2171,6 @@ impl NodeSigner for KeysManager {
 		))
 	}
 
-	fn sign_bolt12_invoice_request(
-		&self, invoice_request: &UnsignedInvoiceRequest,
-	) -> Result<schnorr::Signature, ()> {
-		let message = invoice_request.tagged_hash().as_digest();
-		let keys = Keypair::from_secret_key(&self.secp_ctx, &self.node_secret);
-		let aux_rand = self.get_secure_random_bytes();
-		Ok(self.secp_ctx.sign_schnorr_with_aux_rand(message, &keys, &aux_rand))
-	}
-
 	fn sign_bolt12_invoice(
 		&self, invoice: &UnsignedBolt12Invoice,
 	) -> Result<schnorr::Signature, ()> {
@@ -2365,12 +2340,6 @@ impl NodeSigner for PhantomKeysManager {
 		))
 	}
 
-	fn sign_bolt12_invoice_request(
-		&self, invoice_request: &UnsignedInvoiceRequest,
-	) -> Result<schnorr::Signature, ()> {
-		self.inner.sign_bolt12_invoice_request(invoice_request)
-	}
-
 	fn sign_bolt12_invoice(
 		&self, invoice: &UnsignedBolt12Invoice,
 	) -> Result<schnorr::Signature, ()> {

lightning/src/util/test_utils.rs

@@ -35,7 +35,6 @@ use crate::ln::{msgs, wire};
 use crate::ln::msgs::LightningError;
 use crate::ln::script::ShutdownScript;
 use crate::offers::invoice::{BlindedPayInfo, UnsignedBolt12Invoice};
-use crate::offers::invoice_request::UnsignedInvoiceRequest;
 use crate::onion_message::messenger::{DefaultMessageRouter, Destination, MessageRouter, OnionMessagePath};
 use crate::routing::gossip::{EffectiveCapacity, NetworkGraph, NodeId, RoutingFees};
 use crate::routing::utxo::{UtxoLookup, UtxoLookupError, UtxoResult};
@@ -1221,12 +1220,6 @@ impl NodeSigner for TestNodeSigner {
 		unreachable!()
 	}
 
-	fn sign_bolt12_invoice_request(
-		&self, _invoice_request: &UnsignedInvoiceRequest
-	) -> Result<schnorr::Signature, ()> {
-		unreachable!()
-	}
-
 	fn sign_bolt12_invoice(
 		&self, _invoice: &UnsignedBolt12Invoice,
 	) -> Result<schnorr::Signature, ()> {
@@ -1274,12 +1267,6 @@ impl NodeSigner for TestKeysInterface {
 		self.backing.sign_invoice(hrp_bytes, invoice_data, recipient)
 	}
 
-	fn sign_bolt12_invoice_request(
-		&self, invoice_request: &UnsignedInvoiceRequest
-	) -> Result<schnorr::Signature, ()> {
-		self.backing.sign_bolt12_invoice_request(invoice_request)
-	}
-
 	fn sign_bolt12_invoice(
 		&self, invoice: &UnsignedBolt12Invoice,
 	) -> Result<schnorr::Signature, ()> {