diff --git a/bin/Cargo.lock b/bin/Cargo.lock
index 11f3b90..c3e3774 100644
--- a/bin/Cargo.lock
+++ b/bin/Cargo.lock
@@ -66,6 +66,16 @@ dependencies = [
  "rustc-demangle",
 ]
 
+[[package]]
+name = "bincode"
+version = "1.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f30d3a39baa26f9651f17b375061f3233dde33424a8b72b0dbe93a68a0bc896d"
+dependencies = [
+ "byteorder",
+ "serde",
+]
+
 [[package]]
 name = "bitflags"
 version = "1.2.1"
@@ -1293,6 +1303,16 @@ dependencies = [
  "serde_derive",
 ]
 
+[[package]]
+name = "serde_bencode"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "934d8bdbaa0126dafaea9a8833424a211d9661897717846c6bb782349ca1c30d"
+dependencies = [
+ "serde",
+ "serde_bytes",
+]
+
 [[package]]
 name = "serde_bytes"
 version = "0.11.5"
@@ -1524,6 +1544,7 @@ name = "trust-graph-wasm"
 version = "0.2.0"
 dependencies = [
  "anyhow",
+ "bincode",
  "boolinator",
  "bs58 0.3.1",
  "fce-sqlite-connector",
@@ -1533,6 +1554,7 @@ dependencies = [
  "once_cell",
  "parking_lot",
  "rmp-serde",
+ "serde_bencode",
  "serde_json",
  "trust-graph",
 ]
diff --git a/bin/Cargo.toml b/bin/Cargo.toml
index 32cceaf..f456ff0 100644
--- a/bin/Cargo.toml
+++ b/bin/Cargo.toml
@@ -23,3 +23,5 @@ fce-sqlite-connector = "0.1.3"
 serde_json = "1.0"
 bs58 = "0.3.1"
 rmp-serde = "0.15.0"
+bincode = "1.3.1"
+serde_bencode = "^0.2.3"
diff --git a/bin/run-repl.sh b/bin/run-repl.sh
new file mode 100755
index 0000000..7213443
--- /dev/null
+++ b/bin/run-repl.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+fce build
+mv target/wasm32-wasi/debug/trust-graph.wasm artifacts/
+RUST_LOG="info" fce-repl Config.toml
diff --git a/bin/src/service_api.rs b/bin/src/service_api.rs
index 398a716..d54c496 100644
--- a/bin/src/service_api.rs
+++ b/bin/src/service_api.rs
@@ -3,6 +3,36 @@ use fluence::fce;
 use fluence_identity::KeyPair;
 use std::time::Duration;
 use trust_graph::Certificate;
+use std::str::FromStr;
+
+struct InsertResult {
+    ret_code: u32,
+    error: String,
+}
+
+// TODO: some sort of auth?
+fn insert_cert(certificate: String, duration: u64) -> InsertResult {
+
+    let duration = Duration::from_millis(duration);
+    let certificate = Certificate::from_str(&certificate).unwrap();
+
+    let mut tg = get_data().lock();
+    tg.add(certificate, duration).unwrap();
+
+    return InsertResult {
+        ret_code: 0,
+        error: "".to_string()
+    }
+}
+
+#[fce]
+fn looper() {
+    let mut a = 0;
+    while true {
+        a = a + 1;
+        log::info!("{}", a)
+    }
+}
 
 #[fce]
 fn test() -> String {
diff --git a/bin/src/storage_impl.rs b/bin/src/storage_impl.rs
index 433feab..143c3c4 100644
--- a/bin/src/storage_impl.rs
+++ b/bin/src/storage_impl.rs
@@ -12,12 +12,13 @@ use fce_sqlite_connector::Value;
 use std::str::FromStr;
 use std::time::Duration;
 use trust_graph::{Auth, PublicKeyHashable, Revoke, Storage, TrustGraph, TrustNode, Weight};
+use std::ops::Deref;
 
 static INSTANCE: OnceCell<Mutex<TrustGraph>> = OnceCell::new();
 
 pub fn get_data() -> &'static Mutex<TrustGraph> {
     INSTANCE.get_or_init(|| {
-        let db_path = "/tmp/users.sqlite";
+        let db_path = "/tmp/users123123.sqlite";
         let connection = fce_sqlite_connector::open(db_path).unwrap();
 
         let init_sql = "CREATE TABLE IF NOT EXISTS trustnodes(
@@ -59,11 +60,16 @@ impl Storage for SqliteStorage {
 
         match cursor.next().unwrap() {
             Some(r) => {
-                let tn_bin = r[0]
+                log::info!("row: {:?}", r);
+                let tn_bin: &[u8] = r[0]
                     .as_binary()
                     .expect("unexpected: 'trustnode' in a table should be as binary");
 
+                log::info!("binary: {:?}", tn_bin);
+
                 let trust_node: TrustNode = rmp_serde::from_read_ref(tn_bin)
+                // let trust_node: TrustNode = bincode::deserialize(tn_bin)
+                // let trust_node: TrustNode = serde_bencode::de::from_bytes(tn_bin)
                     .expect("unexpected: 'trustnode' should be as correct binary");
 
                 log::info!("trustnode: {:?}", trust_node);
@@ -82,9 +88,11 @@ impl Storage for SqliteStorage {
             .unwrap()
             .cursor();
 
-        log::info!("insert trustnode: {:?}", node);
-
         let tn_vec = rmp_serde::to_vec(&node).unwrap();
+        // let tn_vec = bincode::serialize(&node).unwrap();
+        let tn_vec = serde_bencode::to_bytes(&node).unwrap();
+
+
 
         cursor
             .bind(&[Value::String(format!("{}", pk)), Value::Binary(tn_vec)])