use bitcoin::secp256k1::{self, PublicKey, Secp256k1, SecretKey};
-use crate::sign::EntropySource;
use crate::ln::msgs::DecodeError;
+use crate::offers::invoice::BlindedPayInfo;
+use crate::sign::EntropySource;
use crate::util::ser::{Readable, Writeable, Writer};
use crate::io;
}
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];
})
}
+ /// Create a one-hop blinded path for a payment.
+ pub fn one_hop_for_payment<ES: EntropySource + ?Sized, 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 a provided node id is invalid.
+ /// Errors if:
+ /// * a provided node id is invalid
+ /// * [`BlindedPayInfo`] calculation results in an integer overflow
+ /// * any unknown features are required in the provided [`ForwardTlvs`]
+ ///
+ /// [`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>(
- intermediate_nodes: &[(PublicKey, payment::ForwardTlvs)], payee_node_id: PublicKey,
- payee_tlvs: payment::ReceiveTlvs, entropy_source: &ES, secp_ctx: &Secp256k1<T>
- ) -> Result<Self, ()> {
+ pub fn new_for_payment<ES: EntropySource + ?Sized, 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>
+ ) -> Result<(BlindedPayInfo, Self), ()> {
let blinding_secret_bytes = entropy_source.get_secure_random_bytes();
let blinding_secret = SecretKey::from_slice(&blinding_secret_bytes[..]).expect("RNG is busted");
- Ok(BlindedPath {
- introduction_node_id: intermediate_nodes.first().map_or(payee_node_id, |n| n.0),
+ let blinded_payinfo = payment::compute_payinfo(intermediate_nodes, &payee_tlvs, htlc_maximum_msat)?;
+ Ok((blinded_payinfo, BlindedPath {
+ introduction_node_id: intermediate_nodes.first().map_or(payee_node_id, |n| n.node_id),
blinding_point: PublicKey::from_secret_key(secp_ctx, &blinding_secret),
blinded_hops: payment::blinded_hops(
secp_ctx, intermediate_nodes, payee_node_id, payee_tlvs, &blinding_secret
).map_err(|_| ())?,
- })
+ }))
}
}