diff --git a/Cargo.lock b/Cargo.lock
index 90da3459..d1651722 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -44,7 +44,9 @@ name = "aquamarine-vm"
 version = "0.1.6"
 dependencies = [
  "fluence-faas",
+ "log",
  "maplit",
+ "parking_lot 0.11.1",
  "serde",
  "serde_json",
  "stepper-interface",
@@ -722,15 +724,6 @@ dependencies = [
  "serde_json",
 ]
 
-[[package]]
-name = "fluence"
-version = "0.2.13"
-source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
-dependencies = [
- "fluence-sdk-macro 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
- "fluence-sdk-main 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
-]
-
 [[package]]
 name = "fluence"
 version = "0.2.13"
@@ -741,6 +734,15 @@ dependencies = [
  "fluence-sdk-main 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "fluence"
+version = "0.2.13"
+source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
+dependencies = [
+ "fluence-sdk-macro 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
+ "fluence-sdk-main 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
+]
+
 [[package]]
 name = "fluence-app-service"
 version = "0.1.18"
@@ -779,14 +781,6 @@ dependencies = [
  "wasmer-wasi-fl",
 ]
 
-[[package]]
-name = "fluence-sdk-macro"
-version = "0.2.13"
-source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
-dependencies = [
- "fluence-sdk-wit 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
-]
-
 [[package]]
 name = "fluence-sdk-macro"
 version = "0.2.13"
@@ -797,13 +791,11 @@ dependencies = [
 ]
 
 [[package]]
-name = "fluence-sdk-main"
+name = "fluence-sdk-macro"
 version = "0.2.13"
 source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
 dependencies = [
- "fluence-sdk-macro 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
- "log",
- "serde",
+ "fluence-sdk-wit 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
 ]
 
 [[package]]
@@ -818,9 +810,20 @@ dependencies = [
 ]
 
 [[package]]
-name = "fluence-sdk-wit"
+name = "fluence-sdk-main"
 version = "0.2.13"
 source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
+dependencies = [
+ "fluence-sdk-macro 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
+ "log",
+ "serde",
+]
+
+[[package]]
+name = "fluence-sdk-wit"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8da5f51cddeae52ff5b91d1a5d8be90e54629f4887f89f8d7501b829b374fe6a"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -833,8 +836,7 @@ dependencies = [
 [[package]]
 name = "fluence-sdk-wit"
 version = "0.2.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8da5f51cddeae52ff5b91d1a5d8be90e54629f4887f89f8d7501b829b374fe6a"
+source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1202,6 +1204,15 @@ dependencies = [
  "safe-transmute",
 ]
 
+[[package]]
+name = "instant"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61124eeebbd69b8190558df225adf7e4caafce0d743919e5d6b19652314ec5ec"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
 [[package]]
 name = "inventory"
 version = "0.1.10"
@@ -1337,6 +1348,15 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "lock_api"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd96ffd135b2fd7b973ac026d28085defbe8983df057ced3eb4f2130b0831312"
+dependencies = [
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.11"
@@ -1576,9 +1596,9 @@ checksum = "13bd41f508810a131401606d54ac32a467c97172d74ba7662562ebba5ad07fa0"
 
 [[package]]
 name = "openssl"
-version = "0.10.31"
+version = "0.10.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d008f51b1acffa0d3450a68606e6a51c123012edaacb0f4e1426bd978869187"
+checksum = "038d43985d1ddca7a9900630d8cd031b56e4794eecc2e9ea39dd17aa04399a70"
 dependencies = [
  "bitflags",
  "cfg-if 1.0.0",
@@ -1596,9 +1616,9 @@ checksum = "77af24da69f9d9341038eba93a073b1fdaaa1b788221b00a69bce9e762cb32de"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.59"
+version = "0.9.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de52d8eabd217311538a39bba130d7dea1f1e118010fee7a033d966845e7d5fe"
+checksum = "921fc71883267538946025deffb622905ecad223c28efbfdef9bb59a0175f3e6"
 dependencies = [
  "autocfg",
  "cc",
@@ -1638,8 +1658,19 @@ version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3a704eb390aafdc107b0e392f56a82b668e3a71366993b5340f5833fd62505e"
 dependencies = [
- "lock_api",
- "parking_lot_core",
+ "lock_api 0.3.4",
+ "parking_lot_core 0.7.2",
+]
+
+[[package]]
+name = "parking_lot"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d7744ac029df22dca6284efe4e898991d28e3085c706c972bcd7da4a27a15eb"
+dependencies = [
+ "instant",
+ "lock_api 0.4.2",
+ "parking_lot_core 0.8.2",
 ]
 
 [[package]]
@@ -1656,6 +1687,20 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "parking_lot_core"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ccb628cad4f84851442432c60ad8e1f607e29752d0bf072cbd0baf28aa34272"
+dependencies = [
+ "cfg-if 1.0.0",
+ "instant",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.1.0"
@@ -2205,7 +2250,7 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 [[package]]
 name = "stepper-interface"
 version = "0.1.0"
-source = "git+https://github.com/fluencelabs/aquamarine#724117547205d8ccc742d325b542af8f3df801b8"
+source = "git+https://github.com/fluencelabs/aquamarine?branch=master#5cb4cc0fb0c149a4bd3160dd0bac9c3d5ac3db7d"
 dependencies = [
  "fluence 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde",
@@ -2847,7 +2892,7 @@ dependencies = [
  "libc",
  "nix 0.15.0",
  "page_size",
- "parking_lot",
+ "parking_lot 0.10.2",
  "rustc_version",
  "serde",
  "serde-bench",
@@ -2876,7 +2921,7 @@ dependencies = [
  "libc",
  "nix 0.15.0",
  "page_size",
- "parking_lot",
+ "parking_lot 0.10.2",
  "rustc_version",
  "serde",
  "serde-bench",
diff --git a/aquamarine-vm/Cargo.toml b/aquamarine-vm/Cargo.toml
index 58e635c1..972519e0 100644
--- a/aquamarine-vm/Cargo.toml
+++ b/aquamarine-vm/Cargo.toml
@@ -15,8 +15,10 @@ fluence-faas = { path = "../fluence-faas", version = "0.1.18" }
 stepper-interface = { git = "https://github.com/fluencelabs/aquamarine", branch = "master" }
 
 maplit = "1.0.2"
-serde_json = "1.0.57"
-serde = "1.0.116"
+serde_json = "1.0.60"
+serde = "1.0.118"
+log = "0.4.11"
+parking_lot = "0.11.1"
 
 [features]
 # enable raw AquamarineVM API intended for testing
diff --git a/aquamarine-vm/src/aquamarine_stepper_vm.rs b/aquamarine-vm/src/aquamarine_stepper_vm.rs
index 1abbc555..87f20ed0 100644
--- a/aquamarine-vm/src/aquamarine_stepper_vm.rs
+++ b/aquamarine-vm/src/aquamarine_stepper_vm.rs
@@ -14,29 +14,57 @@
  * limitations under the License.
  */
 
-use crate::Result;
+use crate::{Result, IType, CallServiceClosure};
 use crate::AquamarineVMError;
 use crate::config::AquamarineVMConfig;
 
-use fluence_faas::FaaSConfig;
+use fluence_faas::{FaaSConfig, HostExportedFunc};
 use fluence_faas::FluenceFaaS;
 use fluence_faas::HostImportDescriptor;
 use fluence_faas::IValue;
 use stepper_interface::StepperOutcome;
 
 use std::path::PathBuf;
-use std::path::Path;
+use std::ops::{Deref, DerefMut};
+use std::sync::Arc;
+use parking_lot::{Mutex};
 
 const CALL_SERVICE_NAME: &str = "call_service";
 const CURRENT_PEER_ID_ENV_NAME: &str = "CURRENT_PEER_ID";
 
-unsafe impl Send for AquamarineVM {}
+/// A newtype needed to mark it as `unsafe impl Send`
+struct SendSafeFaaS(FluenceFaaS);
+
+/// Mark runtime as Send, so libp2p on the node (use-site) is happy
+unsafe impl Send for SendSafeFaaS {}
+
+impl Deref for SendSafeFaaS {
+    type Target = FluenceFaaS;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl DerefMut for SendSafeFaaS {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+/// Information about the particle that is being executed by the stepper at the moment
+#[derive(Debug, Default, Clone)]
+pub struct ParticleParameters {
+    pub init_user_id: String,
+    pub particle_id: String,
+}
 
 pub struct AquamarineVM {
-    faas: FluenceFaaS,
+    faas: SendSafeFaaS,
     particle_data_store: PathBuf,
     /// file name of the AIR interpreter .wasm
     wasm_filename: String,
+    /// information about the particle that is being executed at the moment
+    current_particle: Arc<Mutex<ParticleParameters>>,
 }
 
 impl AquamarineVM {
@@ -44,12 +72,14 @@ impl AquamarineVM {
     pub fn new(config: AquamarineVMConfig) -> Result<Self> {
         use AquamarineVMError::InvalidDataStorePath;
 
+        let current_particle: Arc<Mutex<ParticleParameters>> = <_>::default();
+        let call_service = call_service_descriptor(current_particle.clone(), config.call_service);
         let (wasm_dir, wasm_filename) = split_dirname(config.aquamarine_wasm_path)?;
 
         let faas_config = make_faas_config(
             wasm_dir,
             &wasm_filename,
-            config.call_service,
+            call_service,
             config.current_peer_id,
             config.logging_mask,
         );
@@ -60,9 +90,10 @@ impl AquamarineVM {
             .map_err(|e| InvalidDataStorePath(e, particle_data_store.clone()))?;
 
         let aqua_vm = Self {
-            faas,
+            faas: SendSafeFaaS(faas),
             particle_data_store,
             wasm_filename,
+            current_particle,
         };
 
         Ok(aqua_vm)
@@ -73,22 +104,23 @@ impl AquamarineVM {
         init_user_id: impl Into<String>,
         aqua: impl Into<String>,
         data: impl Into<Vec<u8>>,
-        particle_id: impl AsRef<Path>,
+        particle_id: impl Into<String>,
     ) -> Result<StepperOutcome> {
         use AquamarineVMError::PersistDataError;
 
-        let prev_data_path = self.particle_data_store.join(particle_id);
-        // TODO: check for errors related to invalid file content (such as invalid UTF8 string)
-        let prev_data = std::fs::read_to_string(&prev_data_path).unwrap_or_default();
+        let particle_id = particle_id.into();
+        let init_user_id = init_user_id.into();
 
-        let prev_data = into_ibytes_array(prev_data.into_bytes());
-        let data = into_ibytes_array(data.into());
-        let args = vec![
-            IValue::String(init_user_id.into()),
-            IValue::String(aqua.into()),
-            IValue::Array(prev_data),
-            IValue::Array(data),
-        ];
+        let prev_data_path = self.particle_data_store.join(&particle_id);
+        // TODO: check for errors related to invalid file content (such as invalid UTF8 string)
+        let prev_data = std::fs::read_to_string(&prev_data_path)
+            .unwrap_or_default()
+            .into_bytes();
+
+        let args = prepare_args(prev_data, data, init_user_id.clone(), aqua);
+
+        // Update ParticleParams with the new values so subsequent calls to `call_service` can use them
+        self.update_current_particle(particle_id, init_user_id);
 
         let result =
             self.faas
@@ -103,6 +135,49 @@ impl AquamarineVM {
 
         Ok(outcome)
     }
+
+    fn update_current_particle(&self, particle_id: String, init_user_id: String) {
+        let mut params = self.current_particle.lock();
+        params.particle_id = particle_id;
+        params.init_user_id = init_user_id;
+    }
+}
+
+fn prepare_args(
+    prev_data: Vec<u8>,
+    data: impl Into<Vec<u8>>,
+    init_user_id: String,
+    aqua: impl Into<String>,
+) -> Vec<IValue> {
+    let prev_data = into_ibytes_array(prev_data);
+    let data = into_ibytes_array(data.into());
+
+    vec![
+        IValue::String(init_user_id),
+        IValue::String(aqua.into()),
+        IValue::Array(prev_data),
+        IValue::Array(data),
+    ]
+}
+
+fn call_service_descriptor(
+    params: Arc<Mutex<ParticleParameters>>,
+    call_service: CallServiceClosure,
+) -> HostImportDescriptor {
+    let call_service_closure: HostExportedFunc = Box::new(move |_, ivalues: Vec<IValue>| {
+        let params = {
+            let lock = params.lock();
+            lock.deref().clone()
+        };
+        call_service(params, ivalues)
+    });
+
+    HostImportDescriptor {
+        host_exported_func: call_service_closure,
+        argument_types: vec![IType::String, IType::String, IType::String, IType::String],
+        output_type: Some(IType::Record(0)),
+        error_handler: None,
+    }
 }
 
 /// Splits given path into its directory and file stem
@@ -186,14 +261,7 @@ impl AquamarineVM {
         prev_data: impl Into<Vec<u8>>,
         data: impl Into<Vec<u8>>,
     ) -> Result<StepperOutcome> {
-        let prev_data = into_ibytes_array(prev_data.into());
-        let data = into_ibytes_array(data.into());
-        let args = vec![
-            IValue::String(init_user_id.into()),
-            IValue::String(aqua.into()),
-            IValue::Array(prev_data.into()),
-            IValue::Array(data.into()),
-        ];
+        let args = prepare_args(prev_data.into(), data, init_user_id.into(), aqua);
 
         let result =
             self.faas
diff --git a/aquamarine-vm/src/config.rs b/aquamarine-vm/src/config.rs
index cede41d4..292540c7 100644
--- a/aquamarine-vm/src/config.rs
+++ b/aquamarine-vm/src/config.rs
@@ -14,16 +14,21 @@
  * limitations under the License.
  */
 
-use fluence_faas::HostImportDescriptor;
 use std::path::PathBuf;
 
+use crate::aquamarine_stepper_vm::ParticleParameters;
+use crate::IValue;
+
+pub type CallServiceClosure =
+    Box<dyn Fn(ParticleParameters, Vec<IValue>) -> Option<IValue> + 'static>;
+
 /// Describes behaviour of the Aquamarine VM stepper.
 pub struct AquamarineVMConfig {
     /// Path to a aquamarine stepper Wasm file.
     pub aquamarine_wasm_path: PathBuf,
 
     /// Descriptor of a closure that will be invoked on call_service call from Aquamarine stepper.
-    pub call_service: HostImportDescriptor,
+    pub call_service: CallServiceClosure,
 
     /// Current peer id.
     pub current_peer_id: String,
diff --git a/aquamarine-vm/src/lib.rs b/aquamarine-vm/src/lib.rs
index ad29b843..866b933d 100644
--- a/aquamarine-vm/src/lib.rs
+++ b/aquamarine-vm/src/lib.rs
@@ -29,6 +29,8 @@ mod config;
 mod errors;
 
 pub use aquamarine_stepper_vm::AquamarineVM;
+pub use aquamarine_stepper_vm::ParticleParameters;
+pub use config::CallServiceClosure;
 pub use config::AquamarineVMConfig;
 pub use errors::AquamarineVMError;
 
diff --git a/examples/call_parameters/artifacts/call_parameters.wasm b/examples/call_parameters/artifacts/call_parameters.wasm
index 2a0452eb..a589d140 100755
Binary files a/examples/call_parameters/artifacts/call_parameters.wasm and b/examples/call_parameters/artifacts/call_parameters.wasm differ
diff --git a/examples/greeting/artifacts/greeting.wasm b/examples/greeting/artifacts/greeting.wasm
index ebdbc773..a3384c7a 100755
Binary files a/examples/greeting/artifacts/greeting.wasm and b/examples/greeting/artifacts/greeting.wasm differ
diff --git a/examples/ipfs-node/artifacts/ipfs_effector.wasm b/examples/ipfs-node/artifacts/ipfs_effector.wasm
index 202dbb1f..f405e03e 100755
Binary files a/examples/ipfs-node/artifacts/ipfs_effector.wasm and b/examples/ipfs-node/artifacts/ipfs_effector.wasm differ
diff --git a/examples/ipfs-node/artifacts/ipfs_pure.wasm b/examples/ipfs-node/artifacts/ipfs_pure.wasm
index 167d62f1..53236f46 100755
Binary files a/examples/ipfs-node/artifacts/ipfs_pure.wasm and b/examples/ipfs-node/artifacts/ipfs_pure.wasm differ
diff --git a/examples/records/artifacts/records_effector.wasm b/examples/records/artifacts/records_effector.wasm
index 7a5d68b1..07cc17a1 100755
Binary files a/examples/records/artifacts/records_effector.wasm and b/examples/records/artifacts/records_effector.wasm differ
diff --git a/examples/records/artifacts/records_pure.wasm b/examples/records/artifacts/records_pure.wasm
index f5e611ab..a285de60 100755
Binary files a/examples/records/artifacts/records_pure.wasm and b/examples/records/artifacts/records_pure.wasm differ
diff --git a/examples/sqlite/artifacts/sqlite_test.wasm b/examples/sqlite/artifacts/sqlite_test.wasm
index 1960f1aa..0d96cdcb 100755
Binary files a/examples/sqlite/artifacts/sqlite_test.wasm and b/examples/sqlite/artifacts/sqlite_test.wasm differ
diff --git a/examples/url-downloader/artifacts/curl_adapter.wasm b/examples/url-downloader/artifacts/curl_adapter.wasm
index a78993c1..7ad2c700 100755
Binary files a/examples/url-downloader/artifacts/curl_adapter.wasm and b/examples/url-downloader/artifacts/curl_adapter.wasm differ
diff --git a/examples/url-downloader/artifacts/facade.wasm b/examples/url-downloader/artifacts/facade.wasm
index 96b5ed99..98d976ea 100755
Binary files a/examples/url-downloader/artifacts/facade.wasm and b/examples/url-downloader/artifacts/facade.wasm differ
diff --git a/examples/url-downloader/artifacts/local_storage.wasm b/examples/url-downloader/artifacts/local_storage.wasm
index 25dba77e..988fc228 100755
Binary files a/examples/url-downloader/artifacts/local_storage.wasm and b/examples/url-downloader/artifacts/local_storage.wasm differ