diff --git a/broker/eventbridge/eventbridge.go b/broker/eventbridge/eventbridge.go
index 55a6cac..5772bac 100644
--- a/broker/eventbridge/eventbridge.go
+++ b/broker/eventbridge/eventbridge.go
@@ -115,7 +115,10 @@ func (cli *Client) Enq(bag swarm.Bag) error {
 	}
 
 	if ret.FailedEntryCount > 0 {
-		return fmt.Errorf("%v: %v", ret.Entries[0].ErrorCode, ret.Entries[0].ErrorMessage)
+		return fmt.Errorf("%s: %s",
+			aws.ToString(ret.Entries[0].ErrorCode),
+			aws.ToString(ret.Entries[0].ErrorMessage),
+		)
 	}
 
 	return nil
diff --git a/broker/websocket/awscdk.go b/broker/websocket/awscdk.go
index 5eac1bc..b453380 100644
--- a/broker/websocket/awscdk.go
+++ b/broker/websocket/awscdk.go
@@ -23,7 +23,6 @@ import (
 	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/constructs-go/constructs/v10"
 	"github.com/aws/jsii-runtime-go"
-	"github.com/fogfish/golem/optics"
 	"github.com/fogfish/scud"
 )
 
@@ -67,43 +66,26 @@ func NewSink(scope constructs.Construct, id *string, props *SinkProps) *Sink {
 	return sink
 }
 
-var (
-	lensFunction  = optics.ForProduct1[scud.FunctionGoProps, *map[string]*string]("Environment")
-	lensContainer = optics.ForProduct1[scud.ContainerGoProps, *map[string]*string]("Environment")
-)
-
-func defineLambdaEnvironment[T any](lens optics.Lens[T, *map[string]*string], props *SinkProps, fprops *T) {
-	env := lens.Get(fprops)
-
-	if env == nil {
-		env = &map[string]*string{}
-	}
-
-	if _, has := (*env)["CONFIG_SWARM_WS_EVENT_TYPE"]; !has {
-		(*env)["CONFIG_SWARM_WS_EVENT_TYPE"] = jsii.String(props.Route)
-	}
-
-	if _, has := (*env)["CONFIG_SWARM_WS_URL"]; !has {
-		url := aws.ToString(props.Gateway.ApiEndpoint()) + "/" + stage
-		(*env)["CONFIG_SWARM_WS_URL"] = aws.String(url)
-	}
-
-	lens.Put(fprops, env)
-}
-
 func defaultEnvironment(props *SinkProps) {
-	switch fprops := props.Function.(type) {
+	switch f := props.Function.(type) {
 	case *scud.FunctionGoProps:
-		if fprops.FunctionProps == nil {
-			fprops.FunctionProps = &awslambda.FunctionProps{}
+		if f.FunctionProps == nil {
+			f.FunctionProps = &awslambda.FunctionProps{}
 		}
-
-		defineLambdaEnvironment(lensFunction, props, fprops)
+		if f.FunctionProps.Environment == nil {
+			f.FunctionProps.Environment = &map[string]*string{}
+		}
+		(*f.FunctionProps.Environment)["CONFIG_SWARM_WS_EVENT_TYPE"] = jsii.String(props.Route)
+		(*f.FunctionProps.Environment)["CONFIG_SWARM_WS_URL"] = jsii.String(aws.ToString(props.Gateway.ApiEndpoint()) + "/" + stage)
 	case *scud.ContainerGoProps:
-		if fprops.DockerImageFunctionProps == nil {
-			fprops.DockerImageFunctionProps = &awslambda.DockerImageFunctionProps{}
+		if f.DockerImageFunctionProps == nil {
+			f.DockerImageFunctionProps = &awslambda.DockerImageFunctionProps{}
+		}
+		if f.DockerImageFunctionProps.Environment == nil {
+			f.DockerImageFunctionProps.Environment = &map[string]*string{}
 		}
-		defineLambdaEnvironment(lensContainer, props, fprops)
+		(*f.DockerImageFunctionProps.Environment)["CONFIG_SWARM_WS_EVENT_TYPE"] = jsii.String(props.Route)
+		(*f.DockerImageFunctionProps.Environment)["CONFIG_SWARM_WS_URL"] = jsii.String(aws.ToString(props.Gateway.ApiEndpoint()) + "/" + stage)
 	}
 }
 
diff --git a/codec.go b/codec.go
index 62e99eb..94a1fe5 100644
--- a/codec.go
+++ b/codec.go
@@ -45,6 +45,27 @@ func NewCodecByte() CodecByte { return CodecByte{} }
 
 //------------------------------------------------------------------------------
 
+// Encode Bytes as "JSON packet"
+type CodecPacket struct{}
+
+type packet struct {
+	Octets []byte `json:"p,omitempty"`
+}
+
+func (CodecPacket) Encode(x []byte) ([]byte, error) {
+	b, err := json.Marshal(packet{Octets: x})
+	return b, err
+}
+func (CodecPacket) Decode(x []byte) ([]byte, error) {
+	var pckt packet
+	err := json.Unmarshal(x, &pckt)
+	return pckt.Octets, err
+}
+
+func NewCodecPacket() CodecPacket { return CodecPacket{} }
+
+//------------------------------------------------------------------------------
+
 // Event codec for I/O kernel
 type CodecEvent[T any, E EventKind[T]] struct {
 	source string
diff --git a/internal/kernel/kernel.go b/internal/kernel/kernel.go
index 21333b6..f28adb8 100644
--- a/internal/kernel/kernel.go
+++ b/internal/kernel/kernel.go
@@ -44,7 +44,7 @@ type Kernel struct {
 	sync.WaitGroup
 	sync.RWMutex
 
-	// Kernel configuartion
+	// Kernel configuration
 	Config swarm.Config
 
 	// Control-plane stop channel. It is used to notify the kernel to terminate.
diff --git a/queue/bytes/queue.go b/queue/bytes/queue.go
index 11e80c0..f9ba234 100644
--- a/queue/bytes/queue.go
+++ b/queue/bytes/queue.go
@@ -30,10 +30,15 @@ type queue struct {
 func (q queue) Put(object []byte) error { return q.Enq(q.cat, object) }
 
 func (q queue) Enq(cat string, object []byte) error {
+	obj, err := q.codec.Encode(object)
+	if err != nil {
+		return err
+	}
+
 	ctx := swarm.NewContext(context.Background(), cat, "")
-	bag := swarm.Bag{Ctx: ctx, Object: object}
+	bag := swarm.Bag{Ctx: ctx, Object: obj}
 
-	err := q.emit.Enq(bag)
+	err = q.emit.Enq(bag)
 	if err != nil {
 		return err
 	}