diff --git a/.npmignore b/.npmignore
index 4678238e..ef247aae 100644
--- a/.npmignore
+++ b/.npmignore
@@ -8,5 +8,4 @@ src
 tsconfig.json
 webpack.config.js
 
-*.js.map
-bundle
\ No newline at end of file
+bundle
diff --git a/package.json b/package.json
index 656ac0e8..c54358b7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fluence",
-  "version": "0.7.11",
+  "version": "0.7.24",
   "description": "the browser js-libp2p client for the Fluence network",
   "main": "./dist/fluence.js",
   "typings": "./dist/fluence.d.ts",
diff --git a/src/address.ts b/src/address.ts
index 8221770f..e4d1a2c9 100644
--- a/src/address.ts
+++ b/src/address.ts
@@ -36,6 +36,10 @@ export enum ProtocolType {
 
 const PROTOCOL = "fluence:";
 
+export function getSignature(address: Address): string | undefined {
+    return address.protocols.find(p => p.protocol === ProtocolType.Signature)?.value
+}
+
 export function addressToString(address: Address): string {
     let addressStr = PROTOCOL;
 
@@ -83,6 +87,19 @@ export function parseProtocol(protocol: string, protocolIterator: IterableIterat
 
 }
 
+export async function createRelayAddressWithSig(relay: string, peerId: PeerId, sig: string, hash?: string): Promise<Address> {
+    let protocols = [
+        {protocol: ProtocolType.Peer, value: relay},
+        {protocol: ProtocolType.Client, value: peerId.toB58String()},
+        {protocol: ProtocolType.Signature, value: sig}
+    ];
+
+    return {
+        protocols: protocols,
+        hash: hash
+    }
+}
+
 export async function createRelayAddress(relay: string, peerId: PeerId, withSig: boolean, hash?: string): Promise<Address> {
 
     let protocols = [
diff --git a/src/fluence.ts b/src/fluence.ts
index f6f74805..23802b3f 100644
--- a/src/fluence.ts
+++ b/src/fluence.ts
@@ -24,7 +24,7 @@ log.setLevel('info')
 
 export default class Fluence {
 
-    setLogLevel(level: LogLevelDesc): void {
+    static setLogLevel(level: LogLevelDesc): void {
         log.setLevel(level);
     }
 
diff --git a/src/fluenceClient.ts b/src/fluenceClient.ts
index cecbb23d..87633a76 100644
--- a/src/fluenceClient.ts
+++ b/src/fluenceClient.ts
@@ -20,7 +20,7 @@ import {
     createRelayAddress,
     createProviderAddress,
     ProtocolType,
-    addressToString
+    addressToString, createRelayAddressWithSig
 } from "./address";
 import {callToString, FunctionCall, genUUID, makeFunctionCall,} from "./functionCall";
 import * as PeerId from "peer-id";
@@ -55,7 +55,7 @@ export class FluenceClient {
     readonly selfPeerIdStr: string;
     private nodePeerIdStr: string;
 
-    private connection: FluenceConnection;
+    connection: FluenceConnection;
 
     private services: LocalServices = new LocalServices();
 
@@ -79,12 +79,12 @@ export class FluenceClient {
      * @param predicate will be applied to each incoming call until it matches
      * @param ignoreErrors ignore an errors, wait for success response
      */
-    waitResponse(predicate: (args: any, target: Address, replyTo: Address) => (boolean | undefined), ignoreErrors: boolean): Promise<any> {
+    waitResponse(predicate: (args: any, target: Address, replyTo: Address, moduleId?: string, fname?: string) => (boolean | undefined), ignoreErrors: boolean): Promise<any> {
         return new Promise((resolve, reject) => {
             // subscribe for responses, to handle response
             // TODO if there's no conn, reject
-            this.subscribe((args: any, target: Address, replyTo: Address) => {
-                if (predicate(args, target, replyTo)) {
+            this.subscribe((args: any, target: Address, replyTo: Address, moduleId?: string, fname?: string) => {
+                if (predicate(args, target, replyTo, moduleId, fname)) {
                     if (args.reason) {
                         if (ignoreErrors) {
                             return false;
@@ -134,6 +134,25 @@ export class FluenceClient {
         return await this.waitResponse(predicate, true);
     }
 
+    /**
+     * Send a message to a client that connected with a relay.
+     *
+     * @param relayId
+     * @param clientId
+     * @param sig
+     * @param moduleId
+     * @param args message to the service
+     * @param fname function name
+     * @param name debug info
+     */
+    async callClient(relayId: string, clientId: string, sig: string, moduleId: string, args: any, fname?: string, name?: string): Promise<void> {
+        let msgId = genUUID();
+        let clientPeerId = await PeerId.createFromB58String(clientId);
+        let address = await createRelayAddressWithSig(relayId, clientPeerId, sig);
+
+        await this.sendCall({target: address, args: args, moduleId: moduleId, fname: fname, msgId: msgId, name: name})
+    }
+
     /**
      * Send a call to the local service and wait a response matches predicate on a peer the client connected with.
      *
@@ -373,7 +392,7 @@ export class FluenceClient {
 
     // subscribe new hook for every incoming call, to handle in-service responses and other different cases
     // the hook will be deleted if it will return `true`
-    subscribe(predicate: (args: any, target: Address, replyTo: Address) => (boolean | undefined)) {
+    subscribe(predicate: (args: any, target: Address, replyTo: Address, moduleId?: string, fname?: string) => (boolean | undefined)) {
         this.subscriptions.subscribe(predicate)
     }
 
@@ -417,8 +436,9 @@ export class FluenceClient {
         }
 
         let peerId = PeerId.createFromB58String(nodePeerId);
-        let relayAddress = await createRelayAddress(nodePeerId, this.selfPeerId, true);
-        let connection = new FluenceConnection(multiaddr, peerId, this.selfPeerId, relayAddress, this.handleCall());
+        let sender = await createRelayAddress(nodePeerId, this.selfPeerId, false);
+        let replyTo = await createRelayAddress(nodePeerId, this.selfPeerId, true);
+        let connection = new FluenceConnection(multiaddr, peerId, this.selfPeerId, sender, replyTo, this.handleCall());
 
         await connection.connect();
 
diff --git a/src/fluenceConnection.ts b/src/fluenceConnection.ts
index e1cdb68d..f0ce9294 100644
--- a/src/fluenceConnection.ts
+++ b/src/fluenceConnection.ts
@@ -46,24 +46,26 @@ export class FluenceConnection {
 
     private readonly selfPeerId: PeerId;
     readonly sender: Address;
+    readonly replyTo: Address;
     private node: LibP2p;
     private readonly address: Multiaddr;
     readonly nodePeerId: PeerId;
     private readonly selfPeerIdStr: string;
     private readonly handleCall: (call: FunctionCall) => FunctionCall | undefined;
 
-    constructor(multiaddr: Multiaddr, hostPeerId: PeerId, selfPeerId: PeerId, sender: Address, handleCall: (call: FunctionCall) => FunctionCall | undefined) {
+    constructor(multiaddr: Multiaddr, hostPeerId: PeerId, selfPeerId: PeerId, sender: Address, replyTo: Address, handleCall: (call: FunctionCall) => FunctionCall | undefined) {
         this.selfPeerId = selfPeerId;
         this.handleCall = handleCall;
         this.selfPeerIdStr = selfPeerId.toB58String();
         this.address = multiaddr;
         this.nodePeerId = hostPeerId;
         this.sender = sender
+        this.replyTo = replyTo
     }
 
     makeReplyTo(reply?: string): Address {
         if (reply) {
-            let replyToWithHash = {...this.sender}
+            let replyToWithHash = {...this.replyTo}
             if (typeof reply === "string") replyToWithHash.hash = reply;
             return replyToWithHash;
         } else {
@@ -176,7 +178,7 @@ export class FluenceConnection {
 
     async provideName(name: string) {
         let target = createPeerAddress(this.nodePeerId.toB58String())
-        let regMsg = await makeProvideMessage(name, target, this.sender);
+        let regMsg = await makeProvideMessage(name, target, this.sender, this.replyTo);
         await this.sendCall(regMsg);
     }
 }
diff --git a/src/functionCall.ts b/src/functionCall.ts
index ed8f1c76..e8f3d5cf 100644
--- a/src/functionCall.ts
+++ b/src/functionCall.ts
@@ -94,8 +94,8 @@ export function genUUID() {
 /**
  * Message to provide new name.
  */
-export async function makeProvideMessage(name: string, target: Address, sender: Address): Promise<FunctionCall> {
-    return makeFunctionCall(genUUID(), target, sender, {name: name, address: addressToString(sender)}, "provide", undefined, sender, "provide service_id");
+export async function makeProvideMessage(name: string, target: Address, sender: Address, sigAddress: Address): Promise<FunctionCall> {
+    return makeFunctionCall(genUUID(), target, sender, {name: name, address: addressToString(sigAddress)}, "provide", undefined, sender, "provide service_id");
 }
 
 // TODO uncomment when this will be implemented in Fluence network
diff --git a/src/subscriptions.ts b/src/subscriptions.ts
index b776dc8a..9386303e 100644
--- a/src/subscriptions.ts
+++ b/src/subscriptions.ts
@@ -18,7 +18,7 @@ import {FunctionCall} from "./functionCall";
 import {Address} from "./address";
 
 export class Subscriptions {
-    private subscriptions: ((args: any, target: Address, replyTo: Address) => (boolean | undefined))[] = [];
+    private subscriptions: ((args: any, target: Address, replyTo: Address, module?: string, fname?: string) => (boolean | undefined))[] = [];
 
     constructor() {}
 
@@ -27,7 +27,7 @@ export class Subscriptions {
      * If subscription returns true, delete subscription.
      * @param f
      */
-    subscribe(f: (args: any, target: Address, replyTo: Address) => (boolean | undefined)) {
+    subscribe(f: (args: any, target: Address, replyTo: Address, moduleId?: string, fname?: string) => (boolean | undefined)) {
         this.subscriptions.push(f);
     }
 
@@ -36,7 +36,7 @@ export class Subscriptions {
      * @param call
      */
     applyToSubscriptions(call: FunctionCall) {
-        // if subscription return false - delete it from subscriptions
-        this.subscriptions = this.subscriptions.filter(callback => !callback(call.arguments, call.target, call.reply_to))
+        // if subscription return true - delete it from subscriptions
+        this.subscriptions = this.subscriptions.filter(callback => !callback(call.arguments, call.target, call.reply_to, call.module, call.fname))
     }
 }
diff --git a/tsconfig.json b/tsconfig.json
index 45fb7ffc..56a537cd 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -7,18 +7,20 @@
     ],
     "outDir": "./dist/",
     "sourceMap": true,
+    "inlineSources": true,
     "noImplicitAny": true,
     "strictFunctionTypes": true,
     "allowSyntheticDefaultImports": true,
     "resolveJsonModule": true,
     "pretty": true,
-    "target": "esnext",
+    "target": "es2018",
     "module": "commonjs",
     "moduleResolution": "node",
     "declaration": true,
     "strict": true,
     "strictNullChecks": false,
     "esModuleInterop": true,
+    "declarationMap": true,
     "baseUrl": "."
   },
   "exclude": [