diff --git a/swap/src/database/bob.rs b/swap/src/database/bob.rs
index 6e396a45..d6309154 100644
--- a/swap/src/database/bob.rs
+++ b/swap/src/database/bob.rs
@@ -33,9 +33,9 @@ pub enum Bob {
 #[derive(Clone, strum::Display, Debug, Deserialize, Serialize, PartialEq)]
 pub enum BobEndState {
     SafelyAborted,
-    XmrRedeemed(Box<bob::State6>),
+    XmrRedeemed { tx_lock_id: bitcoin::Txid },
     BtcRefunded(Box<bob::State4>),
-    BtcPunished(Box<bob::State6>),
+    BtcPunished { tx_lock_id: bitcoin::Txid },
 }
 
 impl From<BobState> for Bob {
@@ -50,8 +50,12 @@ impl From<BobState> for Bob {
             BobState::CancelTimelockExpired(state4) => Bob::CancelTimelockExpired(state4),
             BobState::BtcCancelled(state4) => Bob::BtcCancelled(state4),
             BobState::BtcRefunded(state4) => Bob::Done(BobEndState::BtcRefunded(Box::new(state4))),
-            BobState::XmrRedeemed(state6) => Bob::Done(BobEndState::XmrRedeemed(Box::new(state6))),
-            BobState::BtcPunished(state6) => Bob::Done(BobEndState::BtcPunished(Box::new(state6))),
+            BobState::XmrRedeemed { tx_lock_id } => {
+                Bob::Done(BobEndState::XmrRedeemed { tx_lock_id })
+            }
+            BobState::BtcPunished { tx_lock_id } => {
+                Bob::Done(BobEndState::BtcPunished { tx_lock_id })
+            }
             BobState::SafelyAborted => Bob::Done(BobEndState::SafelyAborted),
         }
     }
@@ -70,9 +74,9 @@ impl From<Bob> for BobState {
             Bob::BtcCancelled(state4) => BobState::BtcCancelled(state4),
             Bob::Done(end_state) => match end_state {
                 BobEndState::SafelyAborted => BobState::SafelyAborted,
-                BobEndState::XmrRedeemed(state6) => BobState::XmrRedeemed(*state6),
+                BobEndState::XmrRedeemed { tx_lock_id } => BobState::XmrRedeemed { tx_lock_id },
                 BobEndState::BtcRefunded(state4) => BobState::BtcRefunded(*state4),
-                BobEndState::BtcPunished(state6) => BobState::BtcPunished(*state6),
+                BobEndState::BtcPunished { tx_lock_id } => BobState::BtcPunished { tx_lock_id },
             },
         }
     }
diff --git a/swap/src/protocol/bob/state.rs b/swap/src/protocol/bob/state.rs
index 14137da7..5ab1caea 100644
--- a/swap/src/protocol/bob/state.rs
+++ b/swap/src/protocol/bob/state.rs
@@ -35,8 +35,12 @@ pub enum BobState {
     CancelTimelockExpired(State4),
     BtcCancelled(State4),
     BtcRefunded(State4),
-    XmrRedeemed(State6),
-    BtcPunished(State6),
+    XmrRedeemed {
+        tx_lock_id: bitcoin::Txid,
+    },
+    BtcPunished {
+        tx_lock_id: bitcoin::Txid,
+    },
     SafelyAborted,
 }
 
@@ -52,8 +56,8 @@ impl fmt::Display for BobState {
             BobState::CancelTimelockExpired(..) => write!(f, "cancel timelock is expired"),
             BobState::BtcCancelled(..) => write!(f, "btc is cancelled"),
             BobState::BtcRefunded(..) => write!(f, "btc is refunded"),
-            BobState::XmrRedeemed(..) => write!(f, "xmr is redeemed"),
-            BobState::BtcPunished(..) => write!(f, "btc is punished"),
+            BobState::XmrRedeemed { .. } => write!(f, "xmr is redeemed"),
+            BobState::BtcPunished { .. } => write!(f, "btc is punished"),
             BobState::SafelyAborted => write!(f, "safely aborted"),
         }
     }
@@ -592,12 +596,6 @@ impl State4 {
     pub fn tx_lock_id(&self) -> bitcoin::Txid {
         self.tx_lock.txid()
     }
-
-    pub fn state6(&self) -> State6 {
-        State6 {
-            tx_lock_id: self.tx_lock.txid(),
-        }
-    }
 }
 
 #[derive(Debug, Clone, Deserialize, Serialize, PartialEq)]
@@ -650,21 +648,4 @@ impl State5 {
     pub fn tx_lock_id(&self) -> bitcoin::Txid {
         self.tx_lock.txid()
     }
-
-    pub fn state6(&self) -> State6 {
-        State6 {
-            tx_lock_id: self.tx_lock.txid(),
-        }
-    }
-}
-
-#[derive(Debug, Clone, Deserialize, Serialize, PartialEq)]
-pub struct State6 {
-    pub tx_lock_id: Txid,
-}
-
-impl State6 {
-    pub fn tx_lock_id(&self) -> bitcoin::Txid {
-        self.tx_lock_id
-    }
 }
diff --git a/swap/src/protocol/bob/swap.rs b/swap/src/protocol/bob/swap.rs
index ee9942cc..879efd59 100644
--- a/swap/src/protocol/bob/swap.rs
+++ b/swap/src/protocol/bob/swap.rs
@@ -273,7 +273,9 @@ where
                 // Bob redeems XMR using revealed s_a
                 state.claim_xmr(monero_wallet.as_ref()).await?;
 
-                let state = BobState::XmrRedeemed(state.state6());
+                let state = BobState::XmrRedeemed {
+                    tx_lock_id: state.tx_lock_id(),
+                };
                 let db_state = state.clone().into();
                 db.insert_latest_state(swap_id, Swap::Bob(db_state)).await?;
                 run_until(
@@ -323,7 +325,9 @@ where
                         state.refund_btc(bitcoin_wallet.as_ref()).await?;
                         BobState::BtcRefunded(state)
                     }
-                    ExpiredTimelocks::Punish => BobState::BtcPunished(state.state6()),
+                    ExpiredTimelocks::Punish => BobState::BtcPunished {
+                        tx_lock_id: state.tx_lock_id(),
+                    },
                 };
 
                 let db_state = state.clone().into();
@@ -341,9 +345,9 @@ where
                 .await
             }
             BobState::BtcRefunded(state4) => Ok(BobState::BtcRefunded(state4)),
-            BobState::BtcPunished(state6) => Ok(BobState::BtcPunished(state6)),
+            BobState::BtcPunished { tx_lock_id } => Ok(BobState::BtcPunished { tx_lock_id }),
             BobState::SafelyAborted => Ok(BobState::SafelyAborted),
-            BobState::XmrRedeemed(state6) => Ok(BobState::XmrRedeemed(state6)),
+            BobState::XmrRedeemed { tx_lock_id } => Ok(BobState::XmrRedeemed { tx_lock_id }),
         }
     }
 }
diff --git a/swap/tests/testutils/mod.rs b/swap/tests/testutils/mod.rs
index 95be1e29..30f69b7b 100644
--- a/swap/tests/testutils/mod.rs
+++ b/swap/tests/testutils/mod.rs
@@ -363,8 +363,8 @@ impl BobHarness {
     }
 
     pub async fn assert_redeemed(&self, state: BobState) {
-        let lock_tx_id = if let BobState::XmrRedeemed(state6) = state {
-            state6.tx_lock_id()
+        let lock_tx_id = if let BobState::XmrRedeemed { tx_lock_id } = state {
+            tx_lock_id
         } else {
             panic!("Bob in unexpected state");
         };
@@ -423,8 +423,8 @@ impl BobHarness {
     }
 
     pub async fn assert_punished(&self, state: BobState) {
-        let lock_tx_id = if let BobState::BtcPunished(state6) = state {
-            state6.tx_lock_id()
+        let lock_tx_id = if let BobState::BtcPunished { tx_lock_id } = state {
+            tx_lock_id
         } else {
             panic!("Bob in unexpected state");
         };