X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fblinded_path%2Fmod.rs;h=1415836c01fee6cacaa8d2808f28d6d9ecfba37a;hb=d7a6d0d10db17f8c737bf3ad40e7b9f4343e60d8;hp=927bbea9f6e99ab6e15db2cbb619af0e187060ec;hpb=448b191fec4c6d1e9638c82aade7385b1516aa5d;p=rust-lightning

diff --git a/lightning/src/blinded_path/mod.rs b/lightning/src/blinded_path/mod.rs
index 927bbea9..1415836c 100644
--- a/lightning/src/blinded_path/mod.rs
+++ b/lightning/src/blinded_path/mod.rs
@@ -56,15 +56,22 @@ pub struct BlindedHop {
 }
 
 impl BlindedPath {
+	/// Create a one-hop blinded path for a message.
+	pub fn one_hop_for_message<ES: EntropySource + ?Sized, T: secp256k1::Signing + secp256k1::Verification>(
+		recipient_node_id: PublicKey, entropy_source: &ES, secp_ctx: &Secp256k1<T>
+	) -> Result<Self, ()> {
+		Self::new_for_message(&[recipient_node_id], entropy_source, secp_ctx)
+	}
+
 	/// Create a blinded path for an onion message, to be forwarded along `node_pks`. The last node
 	/// pubkey in `node_pks` will be the destination node.
 	///
-	/// Errors if less than two hops are provided or if `node_pk`(s) are invalid.
+	/// Errors if no hops are provided or if `node_pk`(s) are invalid.
 	//  TODO: make all payloads the same size with padding + add dummy hops
-	pub fn new_for_message<ES: EntropySource, T: secp256k1::Signing + secp256k1::Verification>
-		(node_pks: &[PublicKey], entropy_source: &ES, secp_ctx: &Secp256k1<T>) -> Result<Self, ()>
-	{
-		if node_pks.len() < 2 { return Err(()) }
+	pub fn new_for_message<ES: EntropySource + ?Sized, T: secp256k1::Signing + secp256k1::Verification>(
+		node_pks: &[PublicKey], entropy_source: &ES, secp_ctx: &Secp256k1<T>
+	) -> Result<Self, ()> {
+		if node_pks.is_empty() { return Err(()) }
 		let blinding_secret_bytes = entropy_source.get_secure_random_bytes();
 		let blinding_secret = SecretKey::from_slice(&blinding_secret_bytes[..]).expect("RNG is busted");
 		let introduction_node_id = node_pks[0];
@@ -76,6 +83,19 @@ impl BlindedPath {
 		})
 	}
 
+	/// Create a one-hop blinded path for a payment.
+	pub fn one_hop_for_payment<ES: EntropySource, T: secp256k1::Signing + secp256k1::Verification>(
+		payee_node_id: PublicKey, payee_tlvs: payment::ReceiveTlvs, entropy_source: &ES,
+		secp_ctx: &Secp256k1<T>
+	) -> Result<(BlindedPayInfo, Self), ()> {
+		// This value is not considered in pathfinding for 1-hop blinded paths, because it's intended to
+		// be in relation to a specific channel.
+		let htlc_maximum_msat = u64::max_value();
+		Self::new_for_payment(
+			&[], payee_node_id, payee_tlvs, htlc_maximum_msat, entropy_source, secp_ctx
+		)
+	}
+
 	/// Create a blinded path for a payment, to be forwarded along `intermediate_nodes`.
 	///
 	/// Errors if:
@@ -85,7 +105,7 @@ impl BlindedPath {
 	///
 	/// [`ForwardTlvs`]: crate::blinded_path::payment::ForwardTlvs
 	//  TODO: make all payloads the same size with padding + add dummy hops
-	pub fn new_for_payment<ES: EntropySource, T: secp256k1::Signing + secp256k1::Verification>(
+	pub(crate) fn new_for_payment<ES: EntropySource, T: secp256k1::Signing + secp256k1::Verification>(
 		intermediate_nodes: &[payment::ForwardNode], payee_node_id: PublicKey,
 		payee_tlvs: payment::ReceiveTlvs, htlc_maximum_msat: u64, entropy_source: &ES,
 		secp_ctx: &Secp256k1<T>