+ ///
+ /// Note that MPP keysend is not widely supported yet. The `allow_mpp` lets you choose
+ /// whether your router will be allowed to find a multi-part route for this payment. If you
+ /// set `allow_mpp` to true, you should ensure a payment secret is set on send, likely via
+ /// [`RecipientOnionFields::secret_only`].
+ ///
+ /// [`RecipientOnionFields::secret_only`]: crate::ln::channelmanager::RecipientOnionFields::secret_only
+ pub fn for_keysend(payee_pubkey: PublicKey, final_cltv_expiry_delta: u32, allow_mpp: bool) -> Self {
+ Self::from_node_id(payee_pubkey, final_cltv_expiry_delta)
+ .with_bolt11_features(InvoiceFeatures::for_keysend(allow_mpp))
+ .expect("PaymentParameters::from_node_id should always initialize the payee as unblinded")
+ }
+
+ /// Creates parameters for paying to a blinded payee from the provided invoice. Sets
+ /// [`Payee::Blinded::route_hints`], [`Payee::Blinded::features`], and
+ /// [`PaymentParameters::expiry_time`].
+ pub fn from_bolt12_invoice(invoice: &Bolt12Invoice) -> Self {
+ Self::blinded(invoice.payment_paths().to_vec())
+ .with_bolt12_features(invoice.features().clone()).unwrap()
+ .with_expiry_time(invoice.created_at().as_secs().saturating_add(invoice.relative_expiry().as_secs()))
+ }
+
+ fn blinded(blinded_route_hints: Vec<(BlindedPayInfo, BlindedPath)>) -> Self {
+ Self {
+ payee: Payee::Blinded { route_hints: blinded_route_hints, features: None },
+ expiry_time: None,
+ max_total_cltv_expiry_delta: DEFAULT_MAX_TOTAL_CLTV_EXPIRY_DELTA,
+ max_path_count: DEFAULT_MAX_PATH_COUNT,
+ max_channel_saturation_power_of_half: 2,
+ previously_failed_channels: Vec::new(),
+ }
+ }
+
+ /// Includes the payee's features. Errors if the parameters were not initialized with
+ /// [`PaymentParameters::from_bolt12_invoice`].
+ ///
+ /// This is not exported to bindings users since bindings don't support move semantics
+ pub fn with_bolt12_features(self, features: Bolt12InvoiceFeatures) -> Result<Self, ()> {
+ match self.payee {
+ Payee::Clear { .. } => Err(()),
+ Payee::Blinded { route_hints, .. } =>
+ Ok(Self { payee: Payee::Blinded { route_hints, features: Some(features) }, ..self })
+ }