diff --git a/wasm/main.go b/wasm/main.go
index 644bb441..bba2c3c0 100644
--- a/wasm/main.go
+++ b/wasm/main.go
@@ -114,29 +114,36 @@ func connect(_ js.Value, funcArgs []js.Value) interface{} {
 		resolve := args[0]
 		reject := args[1]
 		if len(funcArgs) != 4 {
-			reject.Invoke("not enough arguments. \"connect(beeEndpoint, stampId, rpc, network)\"")
+			reject.Invoke("not enough arguments. \"connect(beeEndpoint, stampId, rpc, network)\" or \"connect(beeEndpoint, stampId, rpc, network, subRpc, subContractAddress)\"")
 			return nil
 		}
 		beeEndpoint := funcArgs[0].String()
 		stampId := funcArgs[1].String()
 		rpc := funcArgs[2].String()
 		network := funcArgs[3].String()
-		//subRpc := funcArgs[4].String()
-		//subContractAddress := funcArgs[5].String()
+		subRpc := funcArgs[4].String()
+		subContractAddress := funcArgs[5].String()
 		if network != "testnet" && network != "play" {
 			reject.Invoke("unknown network. \"use play or testnet\"")
 			return nil
 		}
 		var (
-			config *contracts.ENSConfig
+			config    *contracts.ENSConfig
+			subConfig *contracts.SubscriptionConfig
 		)
 
 		if network == "play" {
-			config, _ = contracts.PlayConfig()
+			config, subConfig = contracts.PlayConfig()
 		} else {
-			config, _ = contracts.TestnetConfig(contracts.Sepolia)
+			config, subConfig = contracts.TestnetConfig(contracts.Sepolia)
 		}
 		config.ProviderBackend = rpc
+		if subRpc != "" {
+			subConfig.RPC = subRpc
+		}
+		if subContractAddress != "" {
+			subConfig.DataHubAddress = subContractAddress
+		}
 		logger := logging.New(os.Stdout, logrus.DebugLevel)
 
 		go func() {
@@ -145,7 +152,7 @@ func connect(_ js.Value, funcArgs []js.Value) interface{} {
 				Stamp:              stampId,
 				BeeApiEndpoint:     beeEndpoint,
 				EnsConfig:          config,
-				SubscriptionConfig: nil,
+				SubscriptionConfig: subConfig,
 				Logger:             logger,
 			}
 			api, err = dfs.NewDfsAPI(