rename IPFSNode to FluenceFaaS; dir rearranges

Cargo.lock

@@ -370,7 +370,7 @@ dependencies = [
 
 [[package]]
 name = "fce"
-version = "0.2.0"
+version = "0.1.0"
 dependencies = [
  "fce_wit_interfaces",
  "multimap",
@@ -391,6 +391,21 @@ dependencies = [
  "wasmer-interface-types",
 ]
 
+[[package]]
+name = "fluence-faas"
+version = "0.1.0"
+dependencies = [
+ "cmd_lib",
+ "fce",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "toml",
+ "wasmer-runtime",
+ "wasmer-runtime-core",
+ "wasmer-wasi",
+]
+
 [[package]]
 name = "gcc"
 version = "0.3.55"
@@ -517,18 +532,10 @@ dependencies = [
 ]
 
 [[package]]
-name = "ipfs_node_service"
-version = "0.2.0"
+name = "ipfs_node"
+version = "0.1.0"
 dependencies = [
- "cmd_lib",
- "fce",
- "serde",
- "serde_derive",
- "serde_json",
- "toml",
- "wasmer-runtime",
- "wasmer-runtime-core",
- "wasmer-wasi",
+ "fluence-faas",
 ]
 
 [[package]]

Cargo.toml

@@ -2,11 +2,12 @@
 members = [
     "crates/fce_wit_interfaces",
     "crates/wit_parser",
+    "engine",
     "examples/ipfs_node",
     "examples/ipfs_node/wasm/ipfs_node",
     "examples/ipfs_node/wasm/ipfs_rpc",
     "examples/simple_greeting",
-    "fce",
+    "fluence-faas",
     "tools/wit_embedder",
 ]
 

engine/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fce"
-version = "0.2.0"
+version = "0.1.0"
 authors = ["Fluence Labs"]
 edition = "2018"
 

engine/README.md

@@ -0,0 +1,3 @@
+# Fluence Compute Engine
+
+FCE is intended to run various Wasm binaries. At now, it is in the heavily developing phase.

engine/src/engine.rs

@@ -16,8 +16,6 @@
 
 use super::module::FCEModule;
 use super::*;
-use crate::WasmProcess;
-use crate::NodeFunction;
 
 use std::collections::hash_map::Entry;
 use std::collections::HashMap;
@@ -28,22 +26,23 @@ pub struct FCE {
     modules: HashMap<String, FCEModule>,
 }
 
+/// Represent a function type inside FCE.
+#[derive(Debug)]
+pub struct FCEFunction<'a> {
+    pub name: &'a str,
+    pub inputs: &'a Vec<IType>,
+    pub outputs: &'a Vec<IType>,
+}
+
 impl FCE {
     pub fn new() -> Self {
         Self {
             modules: HashMap::new(),
         }
     }
-}
 
-impl Default for FCE {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl WasmProcess for FCE {
-    fn call(
+    /// Invoke a function of a module inside FCE by given function name with given arguments.
+    pub fn call(
         &mut self,
         module_name: &str,
         func_name: &str,
@@ -56,7 +55,8 @@ impl WasmProcess for FCE {
         }
     }
 
-    fn load_module<S>(
+    /// Load a new module inside FCE.
+    pub fn load_module<S>(
         &mut self,
         module_name: S,
         wasm_bytes: &[u8],
@@ -65,8 +65,7 @@ impl WasmProcess for FCE {
     where
         S: Into<String>,
     {
-        let _prepared_wasm_bytes =
-            super::prepare::prepare_module(wasm_bytes, config.mem_pages_count)?;
+        let _prepared_wasm_bytes = crate::misc::prepare_module(wasm_bytes, config.mem_pages_count)?;
 
         let module = FCEModule::new(&wasm_bytes, config, &self.modules)?;
 
@@ -79,7 +78,8 @@ impl WasmProcess for FCE {
         }
     }
 
-    fn unload_module(&mut self, module_name: &str) -> Result<(), FCEError> {
+    /// Unload previously loaded module.
+    pub fn unload_module(&mut self, module_name: &str) -> Result<(), FCEError> {
         match self.modules.entry(module_name.to_string()) {
             Entry::Vacant(_) => Err(FCEError::NoSuchModule),
 
@@ -90,12 +90,13 @@ impl WasmProcess for FCE {
         }
     }
 
-    fn get_interface(&self, module_name: &str) -> Result<Vec<NodeFunction<'_>>, FCEError> {
+    /// Return signatures of all exported by this module functions.
+    pub fn get_interface(&self, module_name: &str) -> Result<Vec<FCEFunction<'_>>, FCEError> {
         match self.modules.get(module_name) {
             Some(module) => {
                 let signatures = module
                     .get_exports_signatures()
-                    .map(|(name, inputs, outputs)| NodeFunction {
+                    .map(|(name, inputs, outputs)| FCEFunction {
                         name,
                         inputs,
                         outputs,
@@ -107,3 +108,9 @@ impl WasmProcess for FCE {
         }
     }
 }
+
+impl Default for FCE {
+    fn default() -> Self {
+        Self::new()
+    }
+}

engine/src/lib.rs

@@ -27,14 +27,15 @@
     unreachable_patterns
 )]
 
-mod vm;
+mod config;
+mod engine;
+mod errors;
+mod module;
 mod misc;
-mod wasm_process;
 
-pub use vm::FCE;
-pub use vm::FCEError;
-pub use vm::FCEModuleConfig;
-pub use vm::IValue;
-pub use vm::IType;
-pub use wasm_process::WasmProcess;
-pub use wasm_process::NodeFunction;
+pub use config::FCEModuleConfig;
+pub use engine::FCE;
+pub use engine::FCEFunction;
+pub use errors::FCEError;
+pub use module::IValue;
+pub use module::IType;

engine/src/misc/mod.rs

@@ -14,6 +14,6 @@
  * limitations under the License.
  */
 
-mod slice_pretty_printer;
+mod prepare;
 
-pub use slice_pretty_printer::SlicePrettyPrinter;
+pub(crate) use prepare::prepare_module;

engine/src/misc/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 super::errors::FCEError;
+use crate::FCEError;
 
 use parity_wasm::{
     builder, elements,
@@ -73,7 +73,7 @@ impl<'a> ModuleBootstrapper {
 
 /// Prepares a Wasm module:
 ///   - set memory page count
-pub fn prepare_module(module: &[u8], mem_pages_count: u32) -> Result<Vec<u8>, FCEError> {
+pub(crate) 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()

engine/src/module/fce_module.rs

@@ -61,7 +61,7 @@ impl Callable {
     }
 }
 
-pub struct FCEModule {
+pub(crate) struct FCEModule {
     // wasmer_instance is needed because WITInstance contains dynamic functions
     // that internally keep pointer to Wasmer instance.
     #[allow(unused)]
@@ -82,7 +82,7 @@ pub struct FCEModule {
 }
 
 impl FCEModule {
-    pub fn new(
+    pub(crate) fn new(
         wasm_bytes: &[u8],
         fce_module_config: FCEModuleConfig,
         modules: &HashMap<String, FCEModule>,
@@ -130,7 +130,11 @@ impl FCEModule {
         })
     }
 
-    pub fn call(&mut self, function_name: &str, args: &[IValue]) -> Result<Vec<IValue>, FCEError> {
+    pub(crate) fn call(
+        &mut self,
+        function_name: &str,
+        args: &[IValue],
+    ) -> Result<Vec<IValue>, FCEError> {
         match self.exports_funcs.get_mut(function_name) {
             Some(func) => Arc::make_mut(func).call(args),
             None => Err(FCEError::NoSuchFunction(format!(
@@ -140,7 +144,7 @@ impl FCEModule {
         }
     }
 
-    pub fn get_exports_signatures(
+    pub(crate) fn get_exports_signatures(
         &self,
     ) -> impl Iterator<Item = (&String, &Vec<IType>, &Vec<IType>)> {
         self.exports_funcs.iter().map(|(func_name, func)| {

engine/src/module/mod.rs

@@ -32,7 +32,7 @@ pub(self) use wasmer_core::types::Value as WValue;
 pub(self) mod wit_prelude {
     pub(super) use super::wit_instance::WITInstance;
     pub(super) use super::exports::WITExport;
-    pub(super) use crate::vm::FCEError;
+    pub(super) use crate::FCEError;
     pub(super) use super::wit_function::WITFunction;
     pub(super) use super::memory::WITMemoryView;
     pub(super) use super::memory::WITMemory;

engine/src/module/wit_function.rs

@@ -17,7 +17,7 @@
 use super::wit_prelude::FCEError;
 use super::fce_module::FCEModule;
 use super::{IType, IValue, WValue};
-use crate::vm::module::fce_module::Callable;
+use super::fce_module::Callable;
 
 use wasmer_wit::interpreter::wasm;
 use wasmer_core::instance::DynFunc;

examples/ipfs_node/Cargo.toml

@@ -1,18 +1,8 @@
 [package]
-name = "ipfs_node_service"
-version = "0.2.0"
+name = "ipfs_node"
+version = "0.1.0"
 authors = ["Fluence Labs"]
 edition = "2018"
 
 [dependencies]
-fce = { path = "../../fce" }
-
-wasmer-core = { package = "wasmer-runtime-core", version = "0.17.0", features = ["dynamicfunc-fat-closures"] }
-wasmer-runtime = "0.17.0"
-wasmer-wasi = "0.17.0"
-
-toml = "0.5.6"
-serde = { version = "1.0.111", features = ["derive"] }
-serde_json = "1.0.53"
-serde_derive = "1.0.111"
-cmd_lib = "0.7.8"
+fluence-faas = { path = "../../fluence-faas" }

examples/ipfs_node/src/main.rs

@@ -14,16 +14,8 @@
  * limitations under the License.
  */
 
-mod node;
-mod node_wasm_service;
-
-pub use node::IpfsNode;
-pub use node::NodeError;
-pub use node::NodePublicInterface;
-pub use node::NodeModulePublicInterface;
-pub use node_wasm_service::NodeWasmService;
-
-use fce::IValue;
+use fluence_faas::FluenceFaaS;
+use fluence_faas::IValue;
 
 use std::path::PathBuf;
 
@@ -37,7 +29,7 @@ const IPFS_RPC: &str = "/Users/mike/dev/work/fluence/wasm/fce/bin/wasm_ipfs_rpc_
 fn main() {
     let ipfs_rpc = std::fs::read(IPFS_RPC).unwrap();
 
-    let mut ipfs_node = IpfsNode::new(
+    let mut ipfs_node = FluenceFaaS::new(
         PathBuf::from(IPFS_MODULES_DIR),
         PathBuf::from(IPFS_MODULES_CONFIG_PATH),
     )
@@ -46,13 +38,13 @@ fn main() {
     println!("ipfs node interface is\n{}", ipfs_node.get_interface());
 
     let node_addresses = ipfs_node
-        .core_call("ipfs_node.wasm", "get_addresses", &[])
+        .call_module("ipfs_node.wasm", "get_addresses", &[])
         .unwrap();
 
     println!("ipfs node addresses are:\n{:?}", node_addresses);
 
     let result = ipfs_node
-        .rpc_call(&ipfs_rpc, "put", &[IValue::String("asdasdasd".to_string())])
+        .call_code(&ipfs_rpc, "put", &[IValue::String("asdasdasd".to_string())])
         .unwrap();
 
     println!("execution result {:?}", result);

examples/ipfs_node/src/node/mod.rs

@@ -1,27 +0,0 @@
-/*
- * Copyright 2020 Fluence Labs Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-mod config;
-mod errors;
-mod imports;
-mod ipfs_node;
-mod node_public_interface;
-mod utils;
-
-pub use ipfs_node::IpfsNode;
-pub use errors::NodeError;
-pub use node_public_interface::NodePublicInterface;
-pub use node_public_interface::NodeModulePublicInterface;

examples/ipfs_node/src/node_wasm_service.rs

@@ -1,38 +0,0 @@
-/*
- * Copyright 2020 Fluence Labs Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-use crate::NodeError;
-use crate::NodePublicInterface;
-
-use fce::IValue;
-
-pub trait NodeWasmService {
-    fn rpc_call(
-        &mut self,
-        wasm_rpc: &[u8],
-        func_name: &str,
-        args: &[IValue],
-    ) -> Result<Vec<IValue>, NodeError>;
-
-    fn core_call(
-        &mut self,
-        module_name: &str,
-        func_name: &str,
-        args: &[IValue],
-    ) -> Result<Vec<IValue>, NodeError>;
-
-    fn get_interface(&self) -> NodePublicInterface;
-}

fce/src/misc/slice_pretty_printer.rs

@@ -1,37 +0,0 @@
-/*
- * Copyright 2020 Fluence Labs Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-pub struct SlicePrettyPrinter<'a>(pub &'a [u8]);
-
-impl<'a> std::fmt::LowerHex for SlicePrettyPrinter<'a> {
-    fn fmt(&self, fmtr: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
-        fmtr.write_fmt(format_args!("0x"))?;
-        for byte in self.0 {
-            fmtr.write_fmt(format_args!("{:02x}", byte))?;
-        }
-        Ok(())
-    }
-}
-
-impl<'a> std::fmt::UpperHex for SlicePrettyPrinter<'a> {
-    fn fmt(&self, fmtr: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
-        fmtr.write_fmt(format_args!("0x"))?;
-        for byte in self.0 {
-            fmtr.write_fmt(format_args!("{:02X}", byte))?;
-        }
-        Ok(())
-    }
-}

fce/src/vm/mod.rs

@@ -1,26 +0,0 @@
-/*
- * Copyright 2020 Fluence Labs Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-mod fce;
-mod module;
-mod config;
-mod prepare;
-mod errors;
-
-pub use fce::FCE;
-pub use config::FCEModuleConfig;
-pub use errors::FCEError;
-pub use module::{IType, IValue};

fce/src/wasm_process.rs

@@ -1,55 +0,0 @@
-/*
- * Copyright 2020 Fluence Labs Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-use super::FCEModuleConfig;
-use super::FCEError;
-use super::IValue;
-use super::IType;
-
-/// Represent a function type inside wasm process.
-#[derive(Debug)]
-pub struct NodeFunction<'a> {
-    pub name: &'a str,
-    pub inputs: &'a Vec<IType>,
-    pub outputs: &'a Vec<IType>,
-}
-
-/// Describe a computation node behaviour in the Fluence network.
-pub trait WasmProcess {
-    /// Invoke a function by given function name with given arguments of a module inside wasm process.
-    fn call(
-        &mut self,
-        module_name: &str,
-        function_name: &str,
-        arguments: &[IValue],
-    ) -> Result<Vec<IValue>, FCEError>;
-
-    /// Load a new module inside wasm process.
-    fn load_module<S>(
-        &mut self,
-        module_name: S,
-        wasm_bytes: &[u8],
-        config: FCEModuleConfig,
-    ) -> Result<(), FCEError>
-    where
-        S: Into<String>;
-
-    /// Unload previously loaded module.
-    fn unload_module(&mut self, module_name: &str) -> Result<(), FCEError>;
-
-    /// Return signatures of all exported by this module functions.
-    fn get_interface(&self, module_name: &str) -> Result<Vec<NodeFunction<'_>>, FCEError>;
-}

fluence-faas/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "fluence-faas"
+version = "0.1.0"
+authors = ["Fluence Labs"]
+edition = "2018"
+
+[dependencies]
+fce = { path = "../engine" }
+
+wasmer-core = { package = "wasmer-runtime-core", version = "0.17.0", features = ["dynamicfunc-fat-closures"] }
+wasmer-runtime = "0.17.0"
+wasmer-wasi = "0.17.0"
+
+toml = "0.5.6"
+serde = { version = "1.0.111", features = ["derive"] }
+serde_json = "1.0.53"
+serde_derive = "1.0.111"
+cmd_lib = "0.7.8"

fluence-faas/README.md

@@ -0,0 +1,3 @@
+# Fluence FaaS
+
+Fluence FaaS is intended to run various Wasm binaries. At now, it is in the heavily developing phase.

fluence-faas/src/errors.rs

@@ -20,7 +20,7 @@ use std::io::Error as IOError;
 use std::error::Error;
 
 #[derive(Debug)]
-pub enum NodeError {
+pub enum FaaSError {
     /// An error related to config parsing.
     ConfigParseError(String),
 
@@ -28,29 +28,29 @@ pub enum NodeError {
     IOError(String),
 
     /// WIT doesn't contain such type.
-    WasmProcessError(FCEError),
+    EngineError(FCEError),
 }
 
-impl Error for NodeError {}
+impl Error for FaaSError {}
 
-impl std::fmt::Display for NodeError {
+impl std::fmt::Display for FaaSError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
         match self {
-            NodeError::ConfigParseError(err_msg) => write!(f, "{}", err_msg),
-            NodeError::IOError(err_msg) => write!(f, "{}", err_msg),
-            NodeError::WasmProcessError(err) => write!(f, "{}", err),
+            FaaSError::ConfigParseError(err_msg) => write!(f, "{}", err_msg),
+            FaaSError::IOError(err_msg) => write!(f, "{}", err_msg),
+            FaaSError::EngineError(err) => write!(f, "{}", err),
         }
     }
 }
 
-impl From<IOError> for NodeError {
+impl From<IOError> for FaaSError {
     fn from(err: IOError) -> Self {
-        NodeError::IOError(format!("{}", err))
+        FaaSError::IOError(format!("{}", err))
     }
 }
 
-impl From<FCEError> for NodeError {
+impl From<FCEError> for FaaSError {
     fn from(err: FCEError) -> Self {
-        NodeError::WasmProcessError(err)
+        FaaSError::EngineError(err)
     }
 }

fluence-faas/src/faas.rs

@@ -14,34 +14,32 @@
  * limitations under the License.
  */
 
-use super::errors::NodeError;
-use super::node_public_interface::NodePublicInterface;
-use super::node_public_interface::NodeModulePublicInterface;
+use super::FaaSError;
+use super::faas_interface::FaaSInterface;
+use super::faas_interface::FaaSModuleInterface;
 
 use fce::FCE;
-use fce::WasmProcess;
-use fce::IValue;
+use super::IValue;
 use fce::FCEModuleConfig;
 
 use std::fs;
 use std::path::PathBuf;
 
-pub struct IpfsNode {
+pub struct FluenceFaaS {
     process: FCE,
-    // names of core modules that is loaded to FCE
+    // names of core modules loaded to FCE
     module_names: Vec<String>,
-    rpc_module_config: FCEModuleConfig,
+    faas_code_config: FCEModuleConfig,
 }
 
-impl IpfsNode {
+impl FluenceFaaS {
     pub fn new<P: Into<PathBuf>>(
         core_modules_dir: P,
         config_file_path: P,
-    ) -> Result<Self, NodeError> {
+    ) -> Result<Self, FaaSError> {
         let mut wasm_process = FCE::new();
         let mut module_names = Vec::new();
-        let mut core_modules_config =
-            super::config::parse_config_from_file(config_file_path.into())?;
+        let mut core_modules_config = crate::misc::parse_config_from_file(config_file_path.into())?;
 
         for entry in fs::read_dir(core_modules_dir.into())? {
             let path = entry?.path();
@@ -54,11 +52,11 @@ impl IpfsNode {
             let module_name = module_name
                 .to_os_string()
                 .into_string()
-                .map_err(|e| NodeError::IOError(format!("failed to read from {:?} file", e)))?;
+                .map_err(|e| FaaSError::IOError(format!("failed to read from {:?} file", e)))?;
 
             let module_bytes = fs::read(path.clone())?;
 
-            let core_module_config = super::utils::make_wasm_process_config(
+            let core_module_config = crate::misc::make_wasm_process_config(
                 core_modules_config.modules_config.remove(&module_name),
             )?;
             wasm_process.load_module(module_name.clone(), &module_bytes, core_module_config)?;
@@ -66,27 +64,25 @@ impl IpfsNode {
         }
 
         let rpc_module_config =
-            super::utils::make_wasm_process_config(core_modules_config.rpc_module_config)?;
+            crate::misc::make_wasm_process_config(core_modules_config.rpc_module_config)?;
 
         Ok(Self {
             process: wasm_process,
             module_names,
-            rpc_module_config,
+            faas_code_config: rpc_module_config,
         })
     }
-}
 
-impl crate::node_wasm_service::NodeWasmService for IpfsNode {
-    fn rpc_call(
+    pub fn call_code(
         &mut self,
         wasm_rpc: &[u8],
         func_name: &str,
         args: &[IValue],
-    ) -> Result<Vec<IValue>, NodeError> {
+    ) -> Result<Vec<IValue>, FaaSError> {
         let rpc_module_name = "ipfs_rpc";
 
         self.process
-            .load_module(rpc_module_name, wasm_rpc, self.rpc_module_config.clone())?;
+            .load_module(rpc_module_name, wasm_rpc, self.faas_code_config.clone())?;
 
         let call_result = self.process.call(rpc_module_name, func_name, args)?;
         self.process.unload_module(rpc_module_name)?;
@@ -94,28 +90,28 @@ impl crate::node_wasm_service::NodeWasmService for IpfsNode {
         Ok(call_result)
     }
 
-    fn core_call(
+    pub fn call_module(
         &mut self,
         module_name: &str,
         func_name: &str,
         args: &[IValue],
-    ) -> Result<Vec<IValue>, NodeError> {
+    ) -> Result<Vec<IValue>, FaaSError> {
         self.process
             .call(module_name, func_name, args)
             .map_err(Into::into)
     }
 
-    fn get_interface(&self) -> NodePublicInterface {
+    pub fn get_interface(&self) -> FaaSInterface {
         let mut modules = Vec::with_capacity(self.module_names.len());
 
         for module_name in self.module_names.iter() {
             let functions = self.process.get_interface(module_name).unwrap();
-            modules.push(NodeModulePublicInterface {
+            modules.push(FaaSModuleInterface {
                 name: module_name,
                 functions,
             })
         }
 
-        NodePublicInterface { modules }
+        FaaSInterface { modules }
     }
 }

fluence-faas/src/faas_interface.rs

@@ -17,17 +17,17 @@
 use std::fmt;
 
 #[derive(Debug)]
-pub struct NodePublicInterface<'a> {
-    pub modules: Vec<NodeModulePublicInterface<'a>>,
+pub struct FaaSInterface<'a> {
+    pub modules: Vec<FaaSModuleInterface<'a>>,
 }
 
 #[derive(Debug)]
-pub struct NodeModulePublicInterface<'a> {
+pub struct FaaSModuleInterface<'a> {
     pub name: &'a str,
-    pub functions: Vec<fce::NodeFunction<'a>>,
+    pub functions: Vec<fce::FCEFunction<'a>>,
 }
 
-impl<'a> fmt::Display for NodePublicInterface<'a> {
+impl<'a> fmt::Display for FaaSInterface<'a> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         for module in self.modules.iter() {
             write!(f, "{}", module)?;
@@ -37,7 +37,7 @@ impl<'a> fmt::Display for NodePublicInterface<'a> {
     }
 }
 
-impl<'a> fmt::Display for NodeModulePublicInterface<'a> {
+impl<'a> fmt::Display for FaaSModuleInterface<'a> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(f, "{}", self.name)?;
 

fluence-faas/src/lib.rs

@@ -14,13 +14,15 @@
  * limitations under the License.
  */
 
-mod node;
-mod node_wasm_service;
+mod errors;
+mod faas;
+mod faas_interface;
+mod misc;
 
 pub use fce::IValue;
+pub use fce::IType;
 
-pub use node::IpfsNode;
-pub use node::NodeError;
-pub use node::NodePublicInterface;
-pub use node::NodeModulePublicInterface;
-pub use node_wasm_service::NodeWasmService;
+pub use errors::FaaSError;
+pub use faas::FluenceFaaS;
+pub use faas_interface::FaaSInterface;
+pub use faas_interface::FaaSModuleInterface;

fluence-faas/src/misc/config.rs

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-use super::errors::NodeError;
+use crate::FaaSError;
 
 use serde_derive::Deserialize;
 use toml::from_slice;
@@ -22,20 +22,30 @@ use toml::from_slice;
 use std::collections::HashMap;
 
 /*
-An example of a config:
+An example of the config:
 
-[ipfs_node]
-    mem_pages_count_count = 100
+[[core_module]]
+    name = "ipfs_node.wasm"
+    mem_pages_count = 100
     logger_enabled = true
 
-    [imports]
-    ipfs = "/usr/bin/ipfs"
+    [core_module.imports]
     mysql = "/usr/bin/mysql"
+    ipfs = "/usr/local/bin/ipfs"
 
-    [wasi]
-    preopened_files = ["/tmp/file1"]
-        [mapped_dirs]
-        tmp = "/tmp"
+    [core_module.wasi]
+    envs = []
+    preopened_files = ["/Users/user/tmp/"]
+    mapped_dirs = { "tmp" = "/Users/user/tmp" }
+
+[rpc_module]
+    mem_pages_count = 100
+    logger_enabled = true
+
+    [rpc_module.wasi]
+    envs = []
+    preopened_files = ["/Users/user/tmp"]
+    mapped_dirs = { "tmp" = "/Users/user/tmp" }
  */
 
 #[derive(Deserialize, Debug)]
@@ -90,10 +100,10 @@ pub(crate) struct WASIConfig {
 
 pub(crate) fn parse_config_from_file(
     config_file_path: std::path::PathBuf,
-) -> Result<NodeConfig, NodeError> {
+) -> Result<NodeConfig, FaaSError> {
     let file_content = std::fs::read(config_file_path)?;
     let config: RawCoreModulesConfig =
-        from_slice(&file_content).map_err(|err| NodeError::ConfigParseError(format!("{}", err)))?;
+        from_slice(&file_content).map_err(|err| FaaSError::ConfigParseError(format!("{}", err)))?;
 
     let modules_config = config
         .core_module

fluence-faas/src/misc/imports.rs

@@ -67,6 +67,8 @@ where
     let func = move |ctx: &mut Ctx, inputs: &[Value]| -> Vec<Value> {
         use wasmer_core::memory::ptr::{Array, WasmPtr};
 
+        // this closure is linked to import function that have (i32, i32) -> i32 type -
+        // it is safe to access input slice without its size checking
         let array_ptr = inputs[0].to_u128() as i32;
         let array_size = inputs[1].to_u128() as i32;
 
@@ -77,9 +79,9 @@ where
         };
 
         unsafe {
-            init_wasm_func_once!(allocate_func, ctx, i32, i32, ALLOCATE_FUNC_NAME, 4);
-            init_wasm_func_once!(set_result_ptr_func, ctx, i32, (), SET_PTR_FUNC_NAME, 5);
-            init_wasm_func_once!(set_result_size_func, ctx, i32, (), SET_SIZE_FUNC_NAME, 6);
+            init_wasm_func_once!(allocate_func, ctx, i32, i32, ALLOCATE_FUNC_NAME, 2);
+            init_wasm_func_once!(set_result_ptr_func, ctx, i32, (), SET_PTR_FUNC_NAME, 3);
+            init_wasm_func_once!(set_result_size_func, ctx, i32, (), SET_SIZE_FUNC_NAME, 4);
 
             let mem_address = call_wasm_func!(allocate_func, result.len() as i32);
             write_to_mem(ctx, mem_address as usize, result.as_bytes());

fluence-faas/src/misc/mod.rs

@@ -0,0 +1,6 @@
+mod imports;
+mod utils;
+mod config;
+
+pub(crate) use utils::make_wasm_process_config;
+pub(crate) use config::parse_config_from_file;

fluence-faas/src/misc/utils.rs

@@ -15,7 +15,7 @@
  */
 
 use wasmer_core::vm::Ctx;
-use super::errors::NodeError;
+use crate::FaaSError;
 use super::config::ModuleConfig;
 
 use fce::FCEModuleConfig;
@@ -33,7 +33,7 @@ use std::path::PathBuf;
 
 // based on Wasmer: https://github.com/wasmerio/wasmer/blob/081f6250e69b98b9f95a8f62ad6d8386534f3279/lib/runtime-core/src/instance.rs#L863
 /// Extract export function from Wasmer instance by name.
-pub(super) unsafe fn get_export_func_by_name<'a, Args, Rets>(
+pub(crate) unsafe fn get_export_func_by_name<'a, Args, Rets>(
     ctx: &'a mut Ctx,
     name: &str,
 ) -> Result<Func<'a, Args, Rets>, ResolveError>
@@ -103,9 +103,9 @@ where
 }
 
 /// Make FCE config based on parsed raw config.
-pub(super) fn make_wasm_process_config(
+pub(crate) fn make_wasm_process_config(
     config: Option<ModuleConfig>,
-) -> Result<FCEModuleConfig, NodeError> {
+) -> Result<FCEModuleConfig, FaaSError> {
     use super::imports::create_host_import_func;
     use super::imports::log_utf8_string;
     use wasmer_core::import::Namespace;