Save state0 in the swarm to process message0

swap/src/alice/execution.rs

@@ -71,16 +71,6 @@ pub async fn negotiate(
     // TODO: get an ack from libp2p2
     swarm.send_amounts(channel, amounts);
 
-    let event = timeout(*BOB_TIME_TO_ACT, swarm.next())
-        .await
-        .context("Failed to receive message 0 from Bob")?;
-    let message0 = match event {
-        OutEvent::Message0(msg) => msg,
-        other => bail!("Unexpected event received: {:?}", other),
-    };
-
-    let SwapAmounts { btc, xmr } = amounts;
-
     let redeem_address = bitcoin_wallet.as_ref().new_address().await?;
     let punish_address = redeem_address.clone();
 
@@ -88,14 +78,27 @@ pub async fn negotiate(
         a,
         s_a,
         v_a,
-        btc,
-        xmr,
+        amounts.btc,
+        amounts.xmr,
         REFUND_TIMELOCK,
         PUNISH_TIMELOCK,
         redeem_address,
         punish_address,
     );
 
+    // TODO(Franck): Understand why this is needed.
+    swarm.set_state0(state0.clone());
+
+    let event = timeout(*BOB_TIME_TO_ACT, swarm.next())
+        .await
+        .context("Failed to receive message 0 from Bob")?;
+    let message0 = match event {
+        OutEvent::Message0(msg) => msg,
+        other => bail!("Unexpected event received: {:?}", other),
+    };
+
+    let SwapAmounts { btc, xmr } = amounts;
+
     let state1 = state0.receive(message0)?;
 
     let event = timeout(*BOB_TIME_TO_ACT, swarm.next())