Renamed htlc to create_htlc so the driver is distinguished from the htlc model

side-node/src/bitcoin/driver/create_htlc.rs

@@ -0,0 +1,54 @@
+use crate::bitcoin::{self, driver};
+use crate::utils;
+use bdk::wallet::AddressIndex::New;
+use bdk::SignOptions;
+
+pub(crate) async fn run() -> anyhow::Result<()> {
+    tracing::info!("starting htlc flow");
+    let (dave, sammy) = driver::setup().await?;
+    let _ = dave.sync();
+    let _ = sammy.sync();
+
+    // format a new commitment transaction like in Lightning
+    let mut commitment_builder = dave.wallet.build_tx();
+    let value = 500;
+    let recipient = sammy.wallet.get_address(New)?.script_pubkey();
+    let hash_preimage = "blah".to_string();
+    let hashlock = utils::sha256(hash_preimage);
+
+    // Feed it a redeem identity, a hashlock from the preimage, a refund timelock, and a refund identity
+    //
+    let htlc = bitcoin::htlc::Htlc::new(dave.public_key, hashlock, 100, sammy.public_key);
+
+    let htlc_descriptor = htlc.to_miniscript_descriptor();
+
+    commitment_builder.add_recipient(recipient, value);
+    commitment_builder.enable_rbf();
+    let (psbt, _) = commitment_builder
+        .finish()
+        .expect("unable to build commitment");
+
+    // sign the commitment transaction
+    let mut dave_psbt = dave.sign(&mut psbt.clone(), false)?;
+    let sammy_psbt = sammy.sign(&mut psbt.clone(), false)?;
+
+    dave_psbt
+        .combine(sammy_psbt)
+        .expect("problem combining bitcoin PSBTs"); // these guys love mutability
+
+    let finalized = dave
+        .wallet
+        .finalize_psbt(&mut dave_psbt, SignOptions::default())
+        .expect("couldn't finalize");
+
+    assert!(finalized);
+    let tx = dave_psbt.extract_tx();
+
+    let _ = dave.broadcast(&tx)?;
+
+    let _ = sammy.sync();
+    let sammy_balance = sammy.wallet.get_balance()?;
+    tracing::info!("sammy balance: {}", sammy_balance);
+
+    Ok(())
+}