diff --git a/Cargo.lock b/Cargo.lock
index 038df488..0639ca3b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1657,6 +1657,7 @@ name = "wasmer-runtime-core"
 version = "0.16.2"
 source = "git+http://github.com/fluencelabs/wasmer?branch=fluence#c3e9e367828d5c3a8d2e96e9ea6a09224e872a59"
 dependencies = [
+ "backtrace 0.3.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "bincode 1.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "blake3 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index cdc56976..5d220b90 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,9 +37,9 @@ bytes = "0.5.4"
 tokio = { version = "0.2.20", features = ["blocking", "macros"] }
 
 [profile.release]
-opt-level = 3
-debug = false
-lto = true
-debug-assertions = false
-overflow-checks = false
-panic = "abort"
+#opt-level = 3
+#debug = false
+#lto = true
+#debug-assertions = false
+#overflow-checks = false
+#panic = "abort"
diff --git a/src/lib.rs b/src/lib.rs
index d2cab149..ebed27e5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -27,5 +27,5 @@ mod misc;
 mod vm;
 
 pub use vm::config::Config;
-pub use vm::frank::Frank;
-pub use vm::service::FrankService;
+pub use vm::fce::FCE;
+pub use vm::service::FCEService;
diff --git a/src/main.rs b/src/main.rs
index 4eb1ea9e..df880bac 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -25,13 +25,13 @@
 #![warn(rust_2018_idioms)]
 
 mod misc;
-/// Command-line tool intended to test Frank VM.
+/// Command-line tool intended to test FCE VM.
 mod vm;
 
 use crate::misc::SlicePrettyPrinter;
 use crate::vm::config::Config;
-use crate::vm::frank::Frank;
-use crate::vm::service::FrankService;
+use crate::vm::fce::FCE;
+use crate::vm::service::FCEService;
 
 use exitfailure::ExitFailure;
 use std::fs;
@@ -39,7 +39,7 @@ use std::fs;
 fn main() -> Result<(), ExitFailure> {
     println!("Welcome to the FCE CLI:");
     let mut rl = rustyline::Editor::<()>::new();
-    let mut frank = Frank::new();
+    let mut fce = FCE::new();
 
     loop {
         let readline = rl.readline(">> ");
@@ -57,20 +57,17 @@ fn main() -> Result<(), ExitFailure> {
                         }
 
                         let config = Config::default();
-                        let result_msg = match frank.register_module(
-                            module_name,
-                            &wasm_bytes.unwrap(),
-                            config,
-                        ) {
-                            Ok(_) => "module successfully registered in Frank".to_string(),
-                            Err(e) => format!("module registration failed with: {:?}", e),
-                        };
+                        let result_msg =
+                            match fce.register_module(module_name, &wasm_bytes.unwrap(), config) {
+                                Ok(_) => "module successfully registered in FCE".to_string(),
+                                Err(e) => format!("module registration failed with: {:?}", e),
+                            };
                         println!("{}", result_msg);
                     }
                     "del" => {
                         let module_name = cmd[1];
-                        let result_msg = match frank.unregister_module(module_name) {
-                            Ok(_) => "module successfully deleted from Frank".to_string(),
+                        let result_msg = match fce.unregister_module(module_name) {
+                            Ok(_) => "module successfully deleted from FCE".to_string(),
                             Err(e) => format!("module deletion failed with: {:?}", e),
                         };
                         println!("{}", result_msg);
@@ -78,7 +75,7 @@ fn main() -> Result<(), ExitFailure> {
                     "execute" => {
                         let module_name = cmd[1];
                         let arg = cmd[2..].join(" ");
-                        let result = match frank.invoke(module_name, arg.as_bytes()) {
+                        let result = match fce.invoke(module_name, arg.as_bytes()) {
                             Ok(result) => {
                                 let outcome_copy = result.outcome.clone();
                                 match String::from_utf8(result.outcome) {
@@ -91,7 +88,7 @@ fn main() -> Result<(), ExitFailure> {
                         println!("{}", result);
                     }
                     "hash" => {
-                        let hash = frank.compute_state_hash();
+                        let hash = fce.compute_state_hash();
                         println!(
                             "vm state hash is {:2x}",
                             SlicePrettyPrinter(hash.as_slice())
@@ -100,8 +97,8 @@ fn main() -> Result<(), ExitFailure> {
                     "help" => {
                         println!(
                             "Enter:\n\
-                                add <module_name> <module_path> - to add a new Wasm module to Frank\n\
-                                del <module_name>               - to delete Wasm module to Frank\n\
+                                add <module_name> <module_path> - to add a new Wasm module to FCE\n\
+                                del <module_name>               - to delete Wasm module to FCE\n\
                                 execute <module_name> <arg>     - to call invoke on module with module_name\n\
                                 hash                            - to compute hash of internal Wasm state\n\
                                 help                            - to print this message\n\
diff --git a/src/vm/errors.rs b/src/vm/errors.rs
index 9f3f0933..483ce920 100644
--- a/src/vm/errors.rs
+++ b/src/vm/errors.rs
@@ -21,7 +21,7 @@ use wasmer_runtime::error::{
 use std::error::Error;
 
 #[derive(Debug)]
-pub enum FrankError {
+pub enum FCEError {
     /// Errors for I/O errors raising while opening a file.
     IOError(String),
 
@@ -47,72 +47,72 @@ pub enum FrankError {
     NoSuchModule,
 }
 
-impl Error for FrankError {}
+impl Error for FCEError {}
 
-impl std::fmt::Display for FrankError {
+impl std::fmt::Display for FCEError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
         match self {
-            FrankError::IOError(msg) => write!(f, "IOError: {}", msg),
-            FrankError::WasmerResolveError(msg) => write!(f, "WasmerResolveError: {}", msg),
-            FrankError::WasmerInvokeError(msg) => write!(f, "WasmerInvokeError: {}", msg),
-            FrankError::WasmerCompileError(msg) => write!(f, "WasmerCompileError: {}", msg),
-            FrankError::WasmerCreationError(msg) => write!(f, "WasmerCreationError: {}", msg),
-            FrankError::PrepareError(msg) => {
+            FCEError::IOError(msg) => write!(f, "IOError: {}", msg),
+            FCEError::WasmerResolveError(msg) => write!(f, "WasmerResolveError: {}", msg),
+            FCEError::WasmerInvokeError(msg) => write!(f, "WasmerInvokeError: {}", msg),
+            FCEError::WasmerCompileError(msg) => write!(f, "WasmerCompileError: {}", msg),
+            FCEError::WasmerCreationError(msg) => write!(f, "WasmerCreationError: {}", msg),
+            FCEError::PrepareError(msg) => {
                 write!(f, "Prepare error: {}, probably module is mailformed", msg)
             }
-            FrankError::NonUniqueModuleName => write!(f, "Frank already has module with such name"),
-            FrankError::NoSuchModule => write!(f, "Frank doesn't have a module with such name"),
+            FCEError::NonUniqueModuleName => write!(f, "FCE already has module with such name"),
+            FCEError::NoSuchModule => write!(f, "FCE doesn't have a module with such name"),
         }
     }
 }
 
-impl From<CreationError> for FrankError {
+impl From<CreationError> for FCEError {
     fn from(err: CreationError) -> Self {
-        FrankError::WasmerCreationError(format!("{}", err))
+        FCEError::WasmerCreationError(format!("{}", err))
     }
 }
 
-impl From<CompileError> for FrankError {
+impl From<CompileError> for FCEError {
     fn from(err: CompileError) -> Self {
-        FrankError::WasmerCompileError(format!("{}", err))
+        FCEError::WasmerCompileError(format!("{}", err))
     }
 }
 
-impl From<parity_wasm::elements::Error> for FrankError {
+impl From<parity_wasm::elements::Error> for FCEError {
     fn from(err: parity_wasm::elements::Error) -> Self {
-        FrankError::PrepareError(format!("{}", err))
+        FCEError::PrepareError(format!("{}", err))
     }
 }
 
-impl From<CallError> for FrankError {
+impl From<CallError> for FCEError {
     fn from(err: CallError) -> Self {
         match err {
-            CallError::Resolve(err) => FrankError::WasmerResolveError(format!("{}", err)),
-            CallError::Runtime(err) => FrankError::WasmerInvokeError(format!("{}", err)),
+            CallError::Resolve(err) => FCEError::WasmerResolveError(format!("{}", err)),
+            CallError::Runtime(err) => FCEError::WasmerInvokeError(format!("{}", err)),
         }
     }
 }
 
-impl From<ResolveError> for FrankError {
+impl From<ResolveError> for FCEError {
     fn from(err: ResolveError) -> Self {
-        FrankError::WasmerResolveError(format!("{}", err))
+        FCEError::WasmerResolveError(format!("{}", err))
     }
 }
 
-impl From<RuntimeError> for FrankError {
+impl From<RuntimeError> for FCEError {
     fn from(err: RuntimeError) -> Self {
-        FrankError::WasmerInvokeError(format!("{}", err))
+        FCEError::WasmerInvokeError(format!("{}", err))
     }
 }
 
-impl From<WasmerError> for FrankError {
+impl From<WasmerError> for FCEError {
     fn from(err: WasmerError) -> Self {
-        FrankError::WasmerInvokeError(format!("{}", err))
+        FCEError::WasmerInvokeError(format!("{}", err))
     }
 }
 
-impl From<std::io::Error> for FrankError {
+impl From<std::io::Error> for FCEError {
     fn from(err: std::io::Error) -> Self {
-        FrankError::IOError(format!("{}", err))
+        FCEError::IOError(format!("{}", err))
     }
 }
diff --git a/src/vm/frank.rs b/src/vm/fce.rs
similarity index 84%
rename from src/vm/frank.rs
rename to src/vm/fce.rs
index 7e47bd16..33be2458 100644
--- a/src/vm/frank.rs
+++ b/src/vm/fce.rs
@@ -14,9 +14,9 @@
  * limitations under the License.
  */
 
-use crate::vm::module::frank_result::FrankResult;
-use crate::vm::module::{FrankModule, ModuleAPI};
-use crate::vm::{config::Config, errors::FrankError, service::FrankService};
+use crate::vm::module::fce_result::FCEResult;
+use crate::vm::module::{FCEModule, ModuleAPI};
+use crate::vm::{config::Config, errors::FCEError, service::FCEService};
 
 use sha2::{digest::generic_array::GenericArray, digest::FixedOutput};
 use std::collections::hash_map::Entry;
@@ -24,15 +24,15 @@ use std::collections::HashMap;
 use wasmer_runtime::func;
 use wasmer_runtime_core::import::{ImportObject, Namespace};
 
-pub struct Frank {
-    // set of modules registered inside Frank
-    modules: HashMap<String, FrankModule>,
+pub struct FCE {
+    // set of modules registered inside FCE
+    modules: HashMap<String, FCEModule>,
 
     // contains ABI of each registered module in specific format for Wasmer
     abi_import_object: ImportObject,
 }
 
-impl Frank {
+impl FCE {
     pub fn new() -> Self {
         Self {
             modules: HashMap::new(),
@@ -41,7 +41,7 @@ impl Frank {
     }
 
     /// Extracts ABI of a module into Namespace.
-    fn create_import_object(module: &FrankModule, config: &Config) -> Namespace {
+    fn create_import_object(module: &FCEModule, config: &Config) -> Namespace {
         let mut namespace = Namespace::new();
         let module_abi = module.get_abi();
 
@@ -86,17 +86,17 @@ impl Frank {
     }
 }
 
-impl Default for Frank {
+impl Default for FCE {
     fn default() -> Self {
         Self::new()
     }
 }
 
-impl FrankService for Frank {
-    fn invoke(&mut self, module_name: &str, argument: &[u8]) -> Result<FrankResult, FrankError> {
+impl FCEService for FCE {
+    fn invoke(&mut self, module_name: &str, argument: &[u8]) -> Result<FCEResult, FCEError> {
         match self.modules.get_mut(module_name) {
             Some(module) => module.invoke(argument),
-            None => Err(FrankError::NoSuchModule),
+            None => Err(FCEError::NoSuchModule),
         }
     }
 
@@ -105,21 +105,21 @@ impl FrankService for Frank {
         module_name: S,
         wasm_bytes: &[u8],
         config: Config,
-    ) -> Result<(), FrankError>
+    ) -> Result<(), FCEError>
     where
         S: Into<String>,
     {
         let prepared_wasm_bytes =
             crate::vm::prepare::prepare_module(wasm_bytes, config.mem_pages_count)?;
 
-        let module = FrankModule::new(
+        let module = FCEModule::new(
             &prepared_wasm_bytes,
             config.clone(),
             self.abi_import_object.clone(),
         )?;
 
         // registers ABI of newly registered module in abi_import_object
-        let namespace = Frank::create_import_object(&module, &config);
+        let namespace = FCE::create_import_object(&module, &config);
         let module_name: String = module_name.into();
         self.abi_import_object
             .register(module_name.clone(), namespace);
@@ -129,14 +129,14 @@ impl FrankService for Frank {
                 entry.insert(module);
                 Ok(())
             }
-            Entry::Occupied(_) => Err(FrankError::NonUniqueModuleName),
+            Entry::Occupied(_) => Err(FCEError::NonUniqueModuleName),
         }
     }
 
-    fn unregister_module(&mut self, module_name: &str) -> Result<(), FrankError> {
+    fn unregister_module(&mut self, module_name: &str) -> Result<(), FCEError> {
         self.modules
             .remove(module_name)
-            .ok_or_else(|| FrankError::NoSuchModule)?;
+            .ok_or_else(|| FCEError::NoSuchModule)?;
         // unregister abi from a dispatcher
 
         Ok(())
diff --git a/src/vm/mod.rs b/src/vm/mod.rs
index d8244384..856d9111 100644
--- a/src/vm/mod.rs
+++ b/src/vm/mod.rs
@@ -16,7 +16,7 @@
 
 pub mod config;
 pub mod errors;
-pub mod frank;
+pub mod fce;
 pub mod service;
 
 mod module;
diff --git a/src/vm/module/abi.rs b/src/vm/module/abi.rs
index d1c52447..43c72830 100644
--- a/src/vm/module/abi.rs
+++ b/src/vm/module/abi.rs
@@ -16,7 +16,7 @@
 
 use wasmer_runtime::Func;
 
-/// Application binary interface of a Frank module. Different module could use such scheme for
+/// Application binary interface of a FCE module. Different module could use such scheme for
 /// communicate with each other.
 ///
 /// Given char string req as a request, the general scheme to use this ABI by other module
@@ -32,7 +32,7 @@ use wasmer_runtime::Func;
 pub(crate) struct ModuleABI<'a> {
     // It is safe to use unwrap() while calling these functions because Option is used here
     // just to allow partially initialization. And all Option fields will contain Some if
-    // invoking Frank::new has been succeed.
+    // invoking FCE::new has been succeed.
     /// Allocates a region of memory inside a module. Used for passing argument inside the module.
     pub(crate) allocate: Option<Func<'a, i32, i32>>,
 
diff --git a/src/vm/module/api.rs b/src/vm/module/api.rs
index 7b063203..efdc010e 100644
--- a/src/vm/module/api.rs
+++ b/src/vm/module/api.rs
@@ -14,16 +14,16 @@
  * limitations under the License.
  */
 
-use crate::vm::errors::FrankError;
-use crate::vm::module::frank_result::FrankResult;
+use crate::vm::errors::FCEError;
+use crate::vm::module::fce_result::FCEResult;
 
 use sha2::digest::generic_array::GenericArray;
 use sha2::digest::FixedOutput;
 
-/// Application interface of a Frank module. Intended to use by Frank instance itself.
+/// Application interface of a FCE module. Intended to use by FCE instance itself.
 pub(crate) trait ModuleAPI {
     /// Invokes a module supplying byte array and expecting byte array with some outcome back.
-    fn invoke(&mut self, argument: &[u8]) -> Result<FrankResult, FrankError>;
+    fn invoke(&mut self, argument: &[u8]) -> Result<FCEResult, FCEError>;
 
     /// Computes hash of the internal modules state.
     fn compute_state_hash(&mut self)
diff --git a/src/vm/module/frank_module.rs b/src/vm/module/fce_module.rs
similarity index 87%
rename from src/vm/module/frank_module.rs
rename to src/vm/module/fce_module.rs
index 9e9599db..a10fb348 100644
--- a/src/vm/module/frank_module.rs
+++ b/src/vm/module/fce_module.rs
@@ -15,8 +15,8 @@
  */
 
 use crate::vm::config::Config;
-use crate::vm::errors::FrankError;
-use crate::vm::module::frank_result::FrankResult;
+use crate::vm::errors::FCEError;
+use crate::vm::module::fce_result::FCEResult;
 use crate::vm::module::{ModuleABI, ModuleAPI};
 
 use sha2::digest::generic_array::GenericArray;
@@ -26,21 +26,17 @@ use wasmer_runtime_core::import::ImportObject;
 use wasmer_runtime_core::memory::ptr::{Array, WasmPtr};
 use wasmer_wasi::generate_import_object_for_version;
 
-pub(crate) struct FrankModule {
+pub(crate) struct FCEModule {
     instance: &'static Instance,
     abi: ModuleABI<'static>,
 }
 
-impl FrankModule {
+impl FCEModule {
     /// Creates a new virtual machine executor.
-    pub fn new(
-        wasm_bytes: &[u8],
-        config: Config,
-        imports: ImportObject,
-    ) -> Result<Self, FrankError> {
+    pub fn new(wasm_bytes: &[u8], config: Config, imports: ImportObject) -> Result<Self, FCEError> {
         let logger_imports = imports! {
             "logger" => {
-                "log_utf8_string" => func!(FrankModule::logger_log_utf8_string),
+                "log_utf8_string" => func!(FCEModule::logger_log_utf8_string),
             },
         };
 
@@ -77,12 +73,12 @@ impl FrankModule {
         let wasm_ptr = WasmPtr::<u8, Array>::new(offset as _);
         match wasm_ptr.get_utf8_string(ctx.memory(0), size as _) {
             Some(msg) => print!("{}", msg),
-            None => print!("frank logger: incorrect UTF8 string's been supplied to logger"),
+            None => print!("fce logger: incorrect UTF8 string's been supplied to logger"),
         }
     }
 
     /// Writes given value on the given address to module memory.
-    fn write_to_mem(&mut self, address: usize, value: &[u8]) -> Result<(), FrankError> {
+    fn write_to_mem(&mut self, address: usize, value: &[u8]) -> Result<(), FCEError> {
         let memory = self.instance.context().memory(0);
 
         for (byte_id, cell) in memory.view::<u8>()[address..(address + value.len())]
@@ -96,7 +92,7 @@ impl FrankModule {
     }
 
     /// Reads invocation result from specified address of memory.
-    fn read_result_from_mem(&self, address: usize) -> Result<Vec<u8>, FrankError> {
+    fn read_result_from_mem(&self, address: usize) -> Result<Vec<u8>, FCEError> {
         let memory = self.instance.context().memory(0);
 
         let mut result_size: usize = 0;
@@ -114,8 +110,8 @@ impl FrankModule {
     }
 }
 
-impl ModuleAPI for FrankModule {
-    fn invoke(&mut self, argument: &[u8]) -> Result<FrankResult, FrankError> {
+impl ModuleAPI for FCEModule {
+    fn invoke(&mut self, argument: &[u8]) -> Result<FCEResult, FCEError> {
         // allocate memory for the given argument and write it to memory
         let argument_len = argument.len() as i32;
         let argument_address = if argument_len != 0 {
@@ -141,7 +137,7 @@ impl ModuleAPI for FrankModule {
             .unwrap()
             .call(result_address, result.len() as i32)?;
 
-        Ok(FrankResult::new(result))
+        Ok(FCEResult::new(result))
     }
 
     fn compute_state_hash(
@@ -155,7 +151,7 @@ impl ModuleAPI for FrankModule {
         let wasm_ptr = WasmPtr::<u8, Array>::new(0 as _);
         let raw_mem = wasm_ptr
             .deref(memory, 0, (memory.size().bytes().0 - 1) as _)
-            .expect("frank: internal error in compute_vm_state_hash");
+            .expect("fce: internal error in compute_vm_state_hash");
         let raw_mem: &[u8] = unsafe { &*(raw_mem as *const [std::cell::Cell<u8>] as *const [u8]) };
 
         hasher.input(raw_mem);
@@ -163,6 +159,6 @@ impl ModuleAPI for FrankModule {
     }
 }
 
-impl Drop for FrankModule {
+impl Drop for FCEModule {
     fn drop(&mut self) {}
 }
diff --git a/src/vm/module/frank_result.rs b/src/vm/module/fce_result.rs
similarity index 94%
rename from src/vm/module/frank_result.rs
rename to src/vm/module/fce_result.rs
index 8fc0484d..ebeb4884 100644
--- a/src/vm/module/frank_result.rs
+++ b/src/vm/module/fce_result.rs
@@ -15,11 +15,11 @@
  */
 
 #[derive(Clone, Debug, PartialEq, Default)]
-pub struct FrankResult {
+pub struct FCEResult {
     pub outcome: Vec<u8>,
 }
 
-impl FrankResult {
+impl FCEResult {
     pub fn new(outcome: Vec<u8>) -> Self {
         Self { outcome }
     }
diff --git a/src/vm/module/mod.rs b/src/vm/module/mod.rs
index c4400449..92b744de 100644
--- a/src/vm/module/mod.rs
+++ b/src/vm/module/mod.rs
@@ -16,9 +16,9 @@
 
 mod abi;
 mod api;
-mod frank_module;
-pub mod frank_result;
+mod fce_module;
+pub mod fce_result;
 
 pub(crate) use abi::ModuleABI;
 pub(crate) use api::ModuleAPI;
-pub(crate) use frank_module::FrankModule;
+pub(crate) use fce_module::FCEModule;
diff --git a/src/vm/prepare.rs b/src/vm/prepare.rs
index 125e52cd..fab55dea 100644
--- a/src/vm/prepare.rs
+++ b/src/vm/prepare.rs
@@ -18,7 +18,7 @@
 // https://github.com/paritytech/substrate/blob/master/srml/contracts/src/wasm/prepare.rs
 // https://github.com/nearprotocol/nearcore/blob/master/runtime/near-vm-runner/src/prepare.rs
 
-use crate::vm::errors::FrankError;
+use crate::vm::errors::FCEError;
 
 use parity_wasm::{
     builder, elements,
@@ -30,7 +30,7 @@ struct ModuleBootstrapper {
 }
 
 impl<'a> ModuleBootstrapper {
-    fn init(module_code: &[u8]) -> Result<Self, FrankError> {
+    fn init(module_code: &[u8]) -> Result<Self, FCEError> {
         let module = elements::deserialize_buffer(module_code)?;
 
         Ok(Self { module })
@@ -66,14 +66,14 @@ impl<'a> ModuleBootstrapper {
         }
     }
 
-    fn into_wasm(self) -> Result<Vec<u8>, FrankError> {
+    fn into_wasm(self) -> Result<Vec<u8>, FCEError> {
         elements::serialize(self.module).map_err(Into::into)
     }
 }
 
 /// Prepares a Wasm module:
 ///   - set memory page count
-pub fn prepare_module(module: &[u8], mem_pages_count: u32) -> Result<Vec<u8>, FrankError> {
+pub fn prepare_module(module: &[u8], mem_pages_count: u32) -> Result<Vec<u8>, FCEError> {
     ModuleBootstrapper::init(module)?
         .set_mem_pages_count(mem_pages_count)
         .into_wasm()
diff --git a/src/vm/service.rs b/src/vm/service.rs
index 555fd13f..8562cc35 100644
--- a/src/vm/service.rs
+++ b/src/vm/service.rs
@@ -15,28 +15,28 @@
  */
 
 use crate::vm::config::Config;
-use crate::vm::errors::FrankError;
-use crate::vm::module::frank_result::FrankResult;
+use crate::vm::errors::FCEError;
+use crate::vm::module::fce_result::FCEResult;
 
 use sha2::digest::generic_array::GenericArray;
 
 /// Describes a service behaviour in the Fluence network.
-pub trait FrankService {
+pub trait FCEService {
     /// Invokes a module supplying byte array and expecting byte array with some outcome back.
-    fn invoke(&mut self, module_name: &str, argument: &[u8]) -> Result<FrankResult, FrankError>;
+    fn invoke(&mut self, module_name: &str, argument: &[u8]) -> Result<FCEResult, FCEError>;
 
-    /// Registers new module in the Frank Service.
+    /// Registers new module in the FCE Service.
     fn register_module<S>(
         &mut self,
         module_name: S,
         wasm_bytes: &[u8],
         config: Config,
-    ) -> Result<(), FrankError>
+    ) -> Result<(), FCEError>
     where
         S: Into<String>;
 
     /// Unregisters previously registered module.
-    fn unregister_module(&mut self, module_name: &str) -> Result<(), FrankError>;
+    fn unregister_module(&mut self, module_name: &str) -> Result<(), FCEError>;
 
     /// Computes hash of the internal modules state.
     fn compute_state_hash(
diff --git a/tests/single_module.rs b/tests/single_module.rs
index 141db342..191002f8 100644
--- a/tests/single_module.rs
+++ b/tests/single_module.rs
@@ -16,7 +16,7 @@
 
 mod downloader;
 
-use fce::{Config, Frank, FrankService};
+use fce::{Config, FCEService, FCE};
 
 const REDIS_DOWNLOAD_URL: &str =
     "https://github.com/fluencelabs/redis/releases/download/0.8.0_w/redis.wasm";
@@ -27,27 +27,26 @@ const SQLITE_DOWNLOAD_URL: &str =
 async fn redis() {
     let wasm_bytes = downloader::download(REDIS_DOWNLOAD_URL).await;
 
-    let mut frank = Frank::new();
+    let mut fce = FCE::new();
     let module_name = "redis";
     let config = Config::default();
 
-    frank
-        .register_module(module_name, wasm_bytes.as_ref(), config)
-        .unwrap_or_else(|e| panic!("can't create Frank: {:?}", e));
+    fce.register_module(module_name, wasm_bytes.as_ref(), config)
+        .unwrap_or_else(|e| panic!("can't create FCE: {:?}", e));
 
-    let result1 = frank
+    let result1 = fce
         .invoke(module_name, "SET A 10".as_bytes())
         .unwrap_or_else(|e| panic!("error while FCE invocation: {:?}", e));
-    let result2 = frank
+    let result2 = fce
         .invoke(module_name, "SADD B 20".as_bytes())
         .unwrap_or_else(|e| panic!("error while FCE invocation: {:?}", e));
-    let result3 = frank
+    let result3 = fce
         .invoke(module_name, "GET A".as_bytes())
         .unwrap_or_else(|e| panic!("error while FCE invocation: {:?}", e));
-    let result4 = frank
+    let result4 = fce
         .invoke(module_name, "SMEMBERS B".as_bytes())
         .unwrap_or_else(|e| panic!("error while FCE invocation: {:?}", e));
-    let result5 = frank
+    let result5 = fce
         .invoke(
             module_name,
             "eval \"redis.call('incr', 'A') return redis.call('get', 'A') * 8 + 5\"  0".as_bytes(),
@@ -71,27 +70,26 @@ async fn redis() {
 async fn sqlite() {
     let wasm_bytes = downloader::download(SQLITE_DOWNLOAD_URL).await;
 
-    let mut frank = Frank::new();
+    let mut fce = FCE::new();
     let module_name = "sqlite";
     let config = Config::default();
 
-    frank
-        .register_module(module_name, wasm_bytes.as_ref(), config)
-        .unwrap_or_else(|e| panic!("can't create Frank: {:?}", e));
+    fce.register_module(module_name, wasm_bytes.as_ref(), config)
+        .unwrap_or_else(|e| panic!("can't create FCE: {:?}", e));
 
-    let result1 = frank
+    let result1 = fce
         .invoke(
             module_name,
             "CREATE VIRTUAL TABLE users USING FTS5(body)".as_bytes(),
         )
         .unwrap_or_else(|e| panic!("error while FCE invocation: {:?}", e));
-    let result2 = frank
+    let result2 = fce
         .invoke(
             module_name,
             "INSERT INTO users(body) VALUES('AB'), ('BC'), ('CD'), ('DE')".as_bytes(),
         )
         .unwrap_or_else(|e| panic!("error while FCE invocation: {:?}", e));
-    let result3 = frank
+    let result3 = fce
         .invoke(
             module_name,
             "SELECT * FROM users WHERE users MATCH 'A* OR B*'".as_bytes(),