Try mutiny2mutiny offers

Author: benthecarman

mutiny-core/src/node.rs

@@ -43,7 +43,7 @@ use crate::utils::get_monitor_version;
 use bitcoin::util::bip32::ExtendedPrivKey;
 use lightning::events::bump_transaction::{BumpTransactionEventHandler, Wallet};
 use lightning::ln::PaymentSecret;
-use lightning::offers::offer::Offer;
+use lightning::offers::offer::{Offer, Quantity};
 use lightning::onion_message::OnionMessenger as LdkOnionMessenger;
 use lightning::sign::{EntropySource, InMemorySigner, NodeSigner, Recipient};
 use lightning::util::config::MaxDustHTLCExposure;
@@ -944,6 +944,43 @@ impl<S: MutinyStorage> Node<S> {
         Ok(invoice)
     }
 
+    pub async fn create_offer(
+        &self,
+        amount_sat: Option<u64>,
+        labels: Vec<String>,
+    ) -> Result<Offer, MutinyError> {
+        // wait for first sync to complete
+        for _ in 0..60 {
+            // check if we've been stopped
+            if self.stop.load(Ordering::Relaxed) {
+                return Err(MutinyError::NotRunning);
+            }
+
+            if let Ok(true) = self.persister.storage.has_done_first_sync() {
+                break;
+            }
+
+            sleep(1_000).await;
+        }
+
+        let mut builder = self
+            .channel_manager
+            .create_offer_builder("".to_string())
+            .supported_quantity(Quantity::Unbounded);
+
+        if let Some(amount_sats) = amount_sat {
+            builder = builder.amount_msats(amount_sats * 1_000);
+        }
+
+        let offer = builder.build()?;
+
+        self.persister
+            .storage
+            .set_invoice_labels(offer.to_string(), labels)?;
+
+        Ok(offer)
+    }
+
     pub fn get_invoice(&self, invoice: &Bolt11Invoice) -> Result<MutinyInvoice, MutinyError> {
         self.get_invoice_by_hash(invoice.payment_hash())
     }
@@ -1225,16 +1262,32 @@ impl<S: MutinyStorage> Node<S> {
         getrandom::getrandom(&mut bytes).map_err(|_| MutinyError::SeedGenerationFailed)?;
         let payment_id = PaymentId(bytes);
 
+        let quantity = match quantity {
+            None => {
+                if offer.expects_quantity() {
+                    Some(1)
+                } else {
+                    None
+                }
+            }
+            Some(q) => Some(q),
+        };
+
         let amount_msats = amt_sats.map(|a| a * 1_000);
-        self.channel_manager.pay_for_offer(
-            &offer,
-            quantity,
-            amount_msats,
-            payer_note,
-            payment_id,
-            Self::retry_strategy(),
-            None,
-        )?;
+        self.channel_manager
+            .pay_for_offer(
+                &offer,
+                quantity,
+                amount_msats,
+                payer_note,
+                payment_id,
+                Self::retry_strategy(),
+                None,
+            )
+            .map_err(|e| {
+                log_error!(self.logger, "failed to make payment: {e:?}");
+                e
+            })?;
 
         // persist and label offer after calling pay_for_offer, it only fails if we can't initiate a payment
 

mutiny-core/src/nodemanager.rs

@@ -1662,6 +1662,20 @@ impl<S: MutinyStorage> NodeManager<S> {
         Ok(invoice.into())
     }
 
+    /// Creates a lightning offer. The amount should be in satoshis.
+    /// If no amount is provided, the offer will be created with no amount.
+    pub async fn create_offer(
+        &self,
+        from_node: &PublicKey,
+        amount: Option<u64>,
+        labels: Vec<String>,
+    ) -> Result<Offer, MutinyError> {
+        let node = self.get_node(from_node).await?;
+        let offer = node.create_offer(amount, labels).await?;
+
+        Ok(offer)
+    }
+
     /// Pays a lightning invoice from the selected node.
     /// An amount should only be provided if the invoice does not have an amount.
     /// The amount should be in satoshis.

mutiny-wasm/src/lib.rs

@@ -646,6 +646,27 @@ impl MutinyWallet {
             .into())
     }
 
+    /// Creates a lightning offer. The amount should be in satoshis.
+    /// If no amount is provided, the offer will be created with no amount.
+    #[wasm_bindgen]
+    pub async fn create_offer(
+        &self,
+        from_node: String,
+        amount: Option<u64>,
+        labels: &JsValue, /* Vec<String> */
+    ) -> Result<String, MutinyJsError> {
+        let from_node = PublicKey::from_str(&from_node)?;
+        let labels: Vec<String> = labels
+            .into_serde()
+            .map_err(|_| MutinyJsError::InvalidArgumentsError)?;
+        Ok(self
+            .inner
+            .node_manager
+            .create_offer(&from_node, amount, labels)
+            .await?
+            .to_string())
+    }
+
     /// Pays a lightning invoice from the selected node.
     /// An amount should only be provided if the invoice does not have an amount.
     /// The amount should be in satoshis.