diff --git a/Cargo.lock b/Cargo.lock
index 063841b..d8bb67c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -594,12 +594,14 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "async-trait",
+ "crunch-envelope",
  "crunch-traits",
  "futures",
  "thiserror",
  "tokio",
  "tokio-stream",
  "tracing",
+ "uuid",
 ]
 
 [[package]]
diff --git a/crates/crunch-in-memory/Cargo.toml b/crates/crunch-in-memory/Cargo.toml
index e8bc10b..bc93a0e 100644
--- a/crates/crunch-in-memory/Cargo.toml
+++ b/crates/crunch-in-memory/Cargo.toml
@@ -7,6 +7,7 @@ edition = "2021"
 
 [dependencies]
 crunch-traits.workspace = true
+crunch-envelope.workspace = true
 
 anyhow.workspace = true
 tracing.workspace = true
@@ -14,4 +15,5 @@ tokio.workspace = true
 thiserror.workspace = true
 async-trait.workspace = true
 futures.workspace = true
+uuid.workspace = true
 tokio-stream = {workspace = true, features = ["sync"]}
diff --git a/crates/crunch-in-memory/src/lib.rs b/crates/crunch-in-memory/src/lib.rs
index bfc7a33..4e5cc30 100644
--- a/crates/crunch-in-memory/src/lib.rs
+++ b/crates/crunch-in-memory/src/lib.rs
@@ -1 +1,92 @@
 pub mod transport;
+
+pub mod persistence {
+    use std::{
+        collections::{BTreeMap, VecDeque},
+        sync::Arc,
+    };
+
+    use async_trait::async_trait;
+    use crunch_traits::{errors::PersistenceError, EventInfo};
+    use tokio::sync::RwLock;
+
+    #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
+    enum MsgState {
+        Pending,
+        Published,
+    }
+
+    #[derive(Debug, Clone)]
+    pub struct Msg {
+        id: String,
+        info: EventInfo,
+        msg: Vec<u8>,
+        state: MsgState,
+    }
+
+    pub struct InMemoryPersistence {
+        pub outbox: Arc<RwLock<VecDeque<Msg>>>,
+        pub store: Arc<RwLock<BTreeMap<String, Msg>>>,
+    }
+
+    #[async_trait]
+    impl crunch_traits::Persistence for InMemoryPersistence {
+        async fn insert(&self, event_info: &EventInfo, content: Vec<u8>) -> anyhow::Result<()> {
+            let msg =
+                crunch_envelope::proto::wrap(event_info.domain, event_info.entity_type, &content);
+            let msg = Msg {
+                id: uuid::Uuid::new_v4().to_string(),
+                info: *event_info,
+                msg,
+                state: MsgState::Pending,
+            };
+            let mut outbox = self.outbox.write().await;
+            outbox.push_back(msg.clone());
+            self.store.write().await.insert(msg.id.clone(), msg);
+
+            tracing::debug!(
+                event_info = event_info.to_string(),
+                content_len = content.len(),
+                "inserted event"
+            );
+
+            Ok(())
+        }
+
+        async fn next(&self) -> Option<String> {
+            let mut outbox = self.outbox.write().await;
+            outbox.pop_front().map(|i| i.id)
+        }
+
+        async fn get(
+            &self,
+            event_id: &str,
+        ) -> Result<Option<(EventInfo, Vec<u8>)>, PersistenceError> {
+            let store = self.store.read().await;
+
+            let event = match store.get(event_id).filter(|m| m.state == MsgState::Pending) {
+                Some(event) => event,
+                None => return Ok(None),
+            };
+
+            let (content, _) = crunch_envelope::proto::unwrap(event.msg.as_slice())
+                .map_err(|e| PersistenceError::GetErr(anyhow::anyhow!(e)))?;
+
+            Ok(Some((event.info, content)))
+        }
+
+        async fn update_published(&self, event_id: &str) -> Result<(), PersistenceError> {
+            match self.store.write().await.get_mut(event_id) {
+                Some(msg) => msg.state = MsgState::Published,
+                None => {
+                    return Err(PersistenceError::UpdatePublished(anyhow::anyhow!(
+                        "event was not found on id: {}",
+                        event_id
+                    )))
+                }
+            }
+
+            Ok(())
+        }
+    }
+}
diff --git a/crates/crunch/src/impls.rs b/crates/crunch/src/impls.rs
index 3c02ecf..ac52c7b 100644
--- a/crates/crunch/src/impls.rs
+++ b/crates/crunch/src/impls.rs
@@ -1,88 +1,4 @@
-use std::{
-    collections::{BTreeMap, VecDeque},
-    ops::Deref,
-    sync::Arc,
-};
-
-use async_trait::async_trait;
-use crunch_traits::{errors::PersistenceError, EventInfo};
-use tokio::sync::RwLock;
-
-#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
-enum MsgState {
-    Pending,
-    Published,
-}
-
-#[derive(Debug, Clone)]
-struct Msg {
-    id: String,
-    info: EventInfo,
-    msg: Vec<u8>,
-    state: MsgState,
-}
-
-pub struct InMemoryPersistence {
-    outbox: Arc<RwLock<VecDeque<Msg>>>,
-    store: Arc<RwLock<BTreeMap<String, Msg>>>,
-}
-
-#[async_trait]
-impl crunch_traits::Persistence for InMemoryPersistence {
-    async fn insert(&self, event_info: &EventInfo, content: Vec<u8>) -> anyhow::Result<()> {
-        let msg = crunch_envelope::proto::wrap(event_info.domain, event_info.entity_type, &content);
-        let msg = Msg {
-            id: uuid::Uuid::new_v4().to_string(),
-            info: *event_info,
-            msg,
-            state: MsgState::Pending,
-        };
-        let mut outbox = self.outbox.write().await;
-        outbox.push_back(msg.clone());
-        self.store.write().await.insert(msg.id.clone(), msg);
-
-        tracing::debug!(
-            event_info = event_info.to_string(),
-            content_len = content.len(),
-            "inserted event"
-        );
-
-        Ok(())
-    }
-
-    async fn next(&self) -> Option<String> {
-        let mut outbox = self.outbox.write().await;
-        outbox.pop_front().map(|i| i.id)
-    }
-
-    async fn get(&self, event_id: &str) -> Result<Option<(EventInfo, Vec<u8>)>, PersistenceError> {
-        let store = self.store.read().await;
-
-        let event = match store.get(event_id).filter(|m| m.state == MsgState::Pending) {
-            Some(event) => event,
-            None => return Ok(None),
-        };
-
-        let (content, _) = crunch_envelope::proto::unwrap(event.msg.as_slice())
-            .map_err(|e| PersistenceError::GetErr(anyhow::anyhow!(e)))?;
-
-        Ok(Some((event.info, content)))
-    }
-
-    async fn update_published(&self, event_id: &str) -> Result<(), PersistenceError> {
-        match self.store.write().await.get_mut(event_id) {
-            Some(msg) => msg.state = MsgState::Published,
-            None => {
-                return Err(PersistenceError::UpdatePublished(anyhow::anyhow!(
-                    "event was not found on id: {}",
-                    event_id
-                )))
-            }
-        }
-
-        Ok(())
-    }
-}
+use std::{ops::Deref, sync::Arc};
 
 #[derive(Clone)]
 pub struct Persistence {
@@ -92,6 +8,8 @@ pub struct Persistence {
 impl Persistence {
     #[cfg(feature = "in-memory")]
     pub fn in_memory() -> Self {
+        use crunch_in_memory::persistence::InMemoryPersistence;
+
         Self {
             inner: std::sync::Arc::new(InMemoryPersistence {
                 outbox: std::sync::Arc::default(),