Refactored bitcoin driver programs

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

@@ -0,0 +1,40 @@
+use crate::bitcoin::driver;
+use bdk::wallet::AddressIndex;
+use bdk::SignOptions;
+
+pub(crate) async fn run() -> anyhow::Result<()> {
+    tracing::info!("starting htlc flow");
+    let (dave, sammy) = driver::setup().await?;
+
+    // format a new commitment transaction like in Lightning
+    let mut commitment_builder = dave.wallet.build_tx();
+    let amount = 500;
+    let recipient = sammy.wallet.get_address(AddressIndex::New)?.script_pubkey();
+    commitment_builder.add_recipient(recipient, amount);
+    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.wallet.get_balance();
+    Ok(())
+}