diff --git a/wit_fce/examples/export_test/src/lib.rs b/wit_fce/examples/export_test/src/lib.rs
index 9e9db848..9646e714 100644
--- a/wit_fce/examples/export_test/src/lib.rs
+++ b/wit_fce/examples/export_test/src/lib.rs
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#![allow(clippy::missing_safety_doc)]
 
 mod mem;
 mod result;
diff --git a/wit_fce/examples/export_test/src/mem.rs b/wit_fce/examples/export_test/src/mem.rs
index e39eb89a..4dd7abd8 100644
--- a/wit_fce/examples/export_test/src/mem.rs
+++ b/wit_fce/examples/export_test/src/mem.rs
@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-
 use std::alloc::{alloc as global_alloc, dealloc as global_dealloc, Layout};
 use std::ptr::NonNull;
 
diff --git a/wit_fce/examples/export_test/src/result.rs b/wit_fce/examples/export_test/src/result.rs
index 872ef773..57ba678c 100644
--- a/wit_fce/examples/export_test/src/result.rs
+++ b/wit_fce/examples/export_test/src/result.rs
@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-
 use std::sync::atomic::AtomicUsize;
 
 pub static mut RESULT_PTR: AtomicUsize = AtomicUsize::new(0);
diff --git a/wit_fce/examples/ipfs_node/src/lib.rs b/wit_fce/examples/ipfs_node/src/lib.rs
index 4fe56e50..5d5f6a05 100644
--- a/wit_fce/examples/ipfs_node/src/lib.rs
+++ b/wit_fce/examples/ipfs_node/src/lib.rs
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#![allow(clippy::missing_safety_doc)]
+
 mod mem;
 mod result;
 
@@ -21,17 +23,14 @@ use crate::result::{RESULT_PTR, RESULT_SIZE};
 
 #[no_mangle]
 pub unsafe fn put(file_content_ptr: *mut u8, file_content_size: usize) {
-    let file_content = String::from_raw_parts(
-        file_content_ptr,
-        file_content_size,
-        file_content_size
-    );
+    let file_content =
+        String::from_raw_parts(file_content_ptr, file_content_size, file_content_size);
 
     let msg = format!("from Wasm node: file content is {}\n", file_content);
     log_utf8_string(msg.as_ptr() as _, msg.len() as _);
 
     let cmd = format!("put {}", file_content);
-    ipfs(file_content.as_ptr() as _, file_content.len() as _);
+    ipfs(cmd.as_ptr() as _, cmd.len() as _);
 
     let result = "Hello from IPFS node, take your hash".to_string();
 
@@ -42,11 +41,7 @@ pub unsafe fn put(file_content_ptr: *mut u8, file_content_size: usize) {
 
 #[no_mangle]
 pub unsafe fn get(hash_ptr: *mut u8, hash_size: usize) {
-    let hash = String::from_raw_parts(
-        hash_ptr,
-        hash_size,
-        hash_size
-    );
+    let hash = String::from_raw_parts(hash_ptr, hash_size, hash_size);
 
     let msg = format!("from Wasm node: file content is {}\n", hash);
     log_utf8_string(msg.as_ptr() as _, msg.len() as _);
diff --git a/wit_fce/examples/ipfs_node/src/mem.rs b/wit_fce/examples/ipfs_node/src/mem.rs
index 23231126..a9fc45d6 100644
--- a/wit_fce/examples/ipfs_node/src/mem.rs
+++ b/wit_fce/examples/ipfs_node/src/mem.rs
@@ -14,9 +14,8 @@
  * limitations under the License.
  */
 
-
-use std::alloc::{alloc as global_alloc, dealloc as global_dealloc, Layout};
 use crate::log_utf8_string;
+use std::alloc::{alloc as global_alloc, dealloc as global_dealloc, Layout};
 use std::ptr::NonNull;
 
 /// Allocates memory area of specified size and returns its address.
diff --git a/wit_fce/examples/ipfs_node/src/result.rs b/wit_fce/examples/ipfs_node/src/result.rs
index b0144bf4..e294922e 100644
--- a/wit_fce/examples/ipfs_node/src/result.rs
+++ b/wit_fce/examples/ipfs_node/src/result.rs
@@ -14,16 +14,15 @@
  * limitations under the License.
  */
 
-
-use std::sync::atomic::AtomicUsize;
 use crate::log_utf8_string;
+use std::sync::atomic::AtomicUsize;
 
 pub static mut RESULT_PTR: AtomicUsize = AtomicUsize::new(0);
 pub static mut RESULT_SIZE: AtomicUsize = AtomicUsize::new(0);
 
 #[no_mangle]
 pub unsafe fn get_result_ptr() -> usize {
-    let msg = format!("wasm_node: calling get_result_ptr\n");
+    let msg = "wasm_node: calling get_result_ptr\n";
     log_utf8_string(msg.as_ptr() as _, msg.len() as _);
 
     *RESULT_PTR.get_mut()
@@ -31,7 +30,7 @@ pub unsafe fn get_result_ptr() -> usize {
 
 #[no_mangle]
 pub unsafe fn get_result_size() -> usize {
-    let msg = format!("wasm_node: calling get_result_size\n");
+    let msg = "wasm_node: calling get_result_size\n";
     log_utf8_string(msg.as_ptr() as _, msg.len() as _);
 
     *RESULT_SIZE.get_mut()
diff --git a/wit_fce/examples/ipfs_rpc/src/lib.rs b/wit_fce/examples/ipfs_rpc/src/lib.rs
index 33348394..bb1f50ec 100644
--- a/wit_fce/examples/ipfs_rpc/src/lib.rs
+++ b/wit_fce/examples/ipfs_rpc/src/lib.rs
@@ -13,19 +13,17 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#![allow(clippy::missing_safety_doc)]
 
 mod mem;
 mod result;
 
-use crate::result::{RESULT_PTR, RESULT_SIZE};
+// use crate::result::{RESULT_PTR, RESULT_SIZE};
 
 #[no_mangle]
 pub unsafe fn invoke(file_content_ptr: *mut u8, file_content_size: usize) {
-    let file_content = String::from_raw_parts(
-        file_content_ptr,
-        file_content_size,
-        file_content_size,
-    );
+    let file_content =
+        String::from_raw_parts(file_content_ptr, file_content_size, file_content_size);
     let msg = format!("from Wasm rpc: file_content is {}\n", file_content);
     log_utf8_string(msg.as_ptr() as _, msg.len() as _);
 
@@ -54,6 +52,7 @@ extern "C" {
     /// Put a file to ipfs, returns ipfs hash of the file.
     fn put(ptr: i32, size: i32);
 
+    #[allow(unused)]
     /// Get file from ipfs by hash.
     fn get(ptr: i32, size: i32);
 }
diff --git a/wit_fce/examples/ipfs_rpc/src/mem.rs b/wit_fce/examples/ipfs_rpc/src/mem.rs
index 60dfca94..a0f490c2 100644
--- a/wit_fce/examples/ipfs_rpc/src/mem.rs
+++ b/wit_fce/examples/ipfs_rpc/src/mem.rs
@@ -14,9 +14,8 @@
  * limitations under the License.
  */
 
-
-use std::alloc::{alloc as global_alloc, dealloc as global_dealloc, Layout};
 use crate::log_utf8_string;
+use std::alloc::{alloc as global_alloc, dealloc as global_dealloc, Layout};
 use std::ptr::NonNull;
 
 /// Allocates memory area of specified size and returns its address.
diff --git a/wit_fce/examples/ipfs_rpc/src/result.rs b/wit_fce/examples/ipfs_rpc/src/result.rs
index 3091d355..4daf8179 100644
--- a/wit_fce/examples/ipfs_rpc/src/result.rs
+++ b/wit_fce/examples/ipfs_rpc/src/result.rs
@@ -14,16 +14,15 @@
  * limitations under the License.
  */
 
-
-use std::sync::atomic::AtomicUsize;
 use crate::log_utf8_string;
+use std::sync::atomic::AtomicUsize;
 
 pub static mut RESULT_PTR: AtomicUsize = AtomicUsize::new(0);
 pub static mut RESULT_SIZE: AtomicUsize = AtomicUsize::new(0);
 
 #[no_mangle]
 pub unsafe fn get_result_ptr() -> usize {
-    let msg = format!("wasm_rpc: calling get_result_ptr\n");
+    let msg = "wasm_rpc: calling get_result_ptr\n";
     log_utf8_string(msg.as_ptr() as _, msg.len() as _);
 
     *RESULT_PTR.get_mut()
@@ -31,7 +30,7 @@ pub unsafe fn get_result_ptr() -> usize {
 
 #[no_mangle]
 pub unsafe fn get_result_size() -> usize {
-    let msg = format!("wasm_rpc: calling get_result_size\n");
+    let msg = "wasm_rpc: calling get_result_size\n";
     log_utf8_string(msg.as_ptr() as _, msg.len() as _);
 
     *RESULT_SIZE.get_mut()
diff --git a/wit_fce/src/instance/wit_function.rs b/wit_fce/src/instance/wit_function.rs
index 5f5d6d7b..2116820d 100644
--- a/wit_fce/src/instance/wit_function.rs
+++ b/wit_fce/src/instance/wit_function.rs
@@ -30,6 +30,7 @@ enum WITFunctionInner {
         outputs: Vec<InterfaceType>,
     },
     Import {
+        // TODO: use WITInstance here instead of WITModule
         wit_module: Arc<WITModule>,
         func_name: String,
         inputs: Vec<InterfaceType>,
diff --git a/wit_fce/src/instance/wit_module.rs b/wit_fce/src/instance/wit_module.rs
index 2179163e..3f48cdf6 100644
--- a/wit_fce/src/instance/wit_module.rs
+++ b/wit_fce/src/instance/wit_module.rs
@@ -39,12 +39,13 @@ use wasmer_runtime_core::import::Namespace;
 const WIT_SECTION_NAME: &str = "interface-types";
 type WITInterpreter =
     Interpreter<WITInstance, WITExport, WITFunction, WITMemory, WITMemoryView<'static>>;
+type WITModuleFunc = (WITInterpreter, Vec<InterfaceType>, Vec<InterfaceType>);
 
 pub struct WITModule {
     #[allow(unused)]
     instance: WasmerInstance,
     wit_instance: Arc<WITInstance>,
-    funcs: HashMap<String, (WITInterpreter, Vec<InterfaceType>, Vec<InterfaceType>)>,
+    funcs: HashMap<String, WITModuleFunc>,
 }
 
 impl WITModule {
@@ -128,10 +129,7 @@ impl WITModule {
 
     fn extract_wit_exports(
         interfaces: &Interfaces,
-    ) -> Result<
-        HashMap<String, (WITInterpreter, Vec<InterfaceType>, Vec<InterfaceType>)>,
-        WITFCEError,
-    > {
+    ) -> Result<HashMap<String, WITModuleFunc>, WITFCEError> {
         let exports_type_to_names = interfaces
             .exports
             .iter()
@@ -254,29 +252,31 @@ impl WITModule {
                 let interpreter: WITInterpreter = instructions.try_into().unwrap();
 
                 let wit_instance = wit_instance.clone();
-                let inner_import = Box::new(move |_: &mut Ctx, inputs: &[Value]| -> Vec<Value> {
-                    // copy here to because otherwise wit_instance will be consumed by the closure
-                    let wit_instance_callable = wit_instance.clone();
-                    let converted_inputs = inputs.iter().map(wval_to_ival).collect::<Vec<_>>();
-                    unsafe {
-                        // error here will be propagated by the special error instruction
-                        let _ = interpreter.run(
-                            &converted_inputs,
-                            Arc::make_mut(&mut wit_instance_callable.assume_init()),
-                        );
-                    }
+                let wit_inner_import =
+                    Box::new(move |_: &mut Ctx, inputs: &[Value]| -> Vec<Value> {
+                        // copy here to because otherwise wit_instance will be consumed by the closure
+                        let wit_instance_callable = wit_instance.clone();
+                        let converted_inputs = inputs.iter().map(wval_to_ival).collect::<Vec<_>>();
+                        unsafe {
+                            // error here will be propagated by the special error instruction
+                            let _ = interpreter.run(
+                                &converted_inputs,
+                                Arc::make_mut(&mut wit_instance_callable.assume_init()),
+                            );
+                        }
 
-                    // wit import functions should only change the stack state -
-                    // the result will be returned by an export function
-                    vec![]
-                });
+                        // wit import functions should only change the stack state -
+                        // the result will be returned by an export function
+                        vec![]
+                    });
 
-                let linking_import = dyn_func_from_imports(inputs.clone(), inner_import);
+                let wit_import = dyn_func_from_imports(inputs.clone(), wit_inner_import);
 
-                let mut n = Namespace::new();
-                n.insert(func_name.clone(), linking_import);
+                // TODO: refactor this
+                let mut module_namespace = Namespace::new();
+                module_namespace.insert(func_name.clone(), wit_import);
 
-                import_namespaces.insert(namespace, n);
+                import_namespaces.insert(namespace, module_namespace);
             } else {
                 // TODO: change error type
                 return Err(WITFCEError::WasmerResolveError(format!(