diff --git a/whatsrust/src/actions.rs b/whatsrust/src/actions.rs
index 5f9d2e3..15961e1 100644
--- a/whatsrust/src/actions.rs
+++ b/whatsrust/src/actions.rs
@@ -1,3 +1,5 @@
+use std::ffi::CString;
+
 use super::*;
 
 pub(crate) fn reaction_to_ffi(
diff --git a/whatsrust/src/lib.rs b/whatsrust/src/lib.rs
index 339438b..a0a35b4 100644
--- a/whatsrust/src/lib.rs
+++ b/whatsrust/src/lib.rs
@@ -2,8 +2,6 @@
 //! Implementation and focused tests live in owning modules.
 //! Explicit reexports keep the public API boundary auditable.
 
-use std::ffi::CString;
-
 #[macro_use]
 mod callbacks;
 mod abi;
@@ -37,7 +35,7 @@ pub use models::{
     FileId, FileKind, ForwardingInfo, GroupInfo, GroupInfoError, GroupParticipant, JID,
     LogoutError, Mention, Message, MessageActionFailed, MessageActionKind, MessageContent,
     MessageId, MessageInfo, PresenceUpdate, ProfilePicture, ProfilePictureAvailability,
-    ProfilePictureError,
+    ProfilePictureError, VIEW_ONCE_UNAVAILABLE_DESCRIPTION,
 };
 pub use presence::{SubscribePresenceResult, drain_raw_presence_diagnostics, subscribe_presence};
 pub use queries::{
@@ -54,18 +52,3 @@ pub use caches::{
     remove_forward_source, store_forward_source, store_message_mention_ranges,
     store_message_push_name,
 };
-
-pub const VIEW_ONCE_UNAVAILABLE_DESCRIPTION: &str =
-    "View-once media is unavailable here. View it on your phone.";
-
-impl CallbackTranslator<CJID> for JID {
-    unsafe fn to_rust(from: CJID) -> Self {
-        (&from).into()
-    }
-}
-
-impl CallbackTranslator<i64> for i64 {
-    unsafe fn to_rust(value: i64) -> Self {
-        value
-    }
-}
diff --git a/whatsrust/src/lifecycle.rs b/whatsrust/src/lifecycle.rs
index 1c1fb85..3ab9d75 100644
--- a/whatsrust/src/lifecycle.rs
+++ b/whatsrust/src/lifecycle.rs
@@ -1,4 +1,4 @@
-use std::ffi::{CStr, c_char};
+use std::ffi::{CStr, CString, c_char};
 
 use super::*;
 
diff --git a/whatsrust/src/media.rs b/whatsrust/src/media.rs
index ff23386..82e3925 100644
--- a/whatsrust/src/media.rs
+++ b/whatsrust/src/media.rs
@@ -1,4 +1,7 @@
-use std::{ffi::CStr, path::Path};
+use std::{
+    ffi::{CStr, CString},
+    path::Path,
+};
 
 use super::*;
 
diff --git a/whatsrust/src/models.rs b/whatsrust/src/models.rs
index fdc537b..a5f50ff 100644
--- a/whatsrust/src/models.rs
+++ b/whatsrust/src/models.rs
@@ -6,6 +6,7 @@ use std::{
 use strum::{EnumIter, FromRepr};
 
 use crate::abi::{CContact, CJID, LogoutStatus, ReceiptKind};
+use crate::callbacks::CallbackTranslator;
 
 #[derive(Clone, Debug, Eq, Hash, PartialEq)]
 pub struct JID(pub Arc<str>);
@@ -34,6 +35,15 @@ impl From<&JID> for CJID {
     }
 }
 
+impl CallbackTranslator<CJID> for JID {
+    unsafe fn to_rust(from: CJID) -> Self {
+        (&from).into()
+    }
+}
+
+pub const VIEW_ONCE_UNAVAILABLE_DESCRIPTION: &str =
+    "View-once media is unavailable here. View it on your phone.";
+
 pub type MessageId = Arc<str>;
 
 #[derive(Clone, Debug)]
diff --git a/whatsrust/src/presence.rs b/whatsrust/src/presence.rs
index 9c6d741..5fe807a 100644
--- a/whatsrust/src/presence.rs
+++ b/whatsrust/src/presence.rs
@@ -1,5 +1,5 @@
 use std::{
-    ffi::{CStr, c_char},
+    ffi::{CStr, CString, c_char},
     sync::atomic::{AtomicUsize, Ordering},
 };
 
diff --git a/whatsrust/src/registrations.rs b/whatsrust/src/registrations.rs
index 72680cd..074b35a 100644
--- a/whatsrust/src/registrations.rs
+++ b/whatsrust/src/registrations.rs
@@ -20,6 +20,12 @@ impl CallbackTranslator<u8> for u8 {
     }
 }
 
+impl CallbackTranslator<i64> for i64 {
+    unsafe fn to_rust(value: i64) -> Self {
+        value
+    }
+}
+
 pub fn set_presence_handler<F>(mut callback: F)
 where
     F: FnMut(PresenceUpdate) + 'static,