refactor: use destination config from config-be than from message

Earlier transformer was sending destConfig in message and it contains
secrets so it is appearing in live events so refactored code to use
config from CP.

services/streammanager/lambda/lambdamanager.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/aws/aws-sdk-go/service/lambda"
 	jsoniter "github.com/json-iterator/go"
+	"github.com/mitchellh/mapstructure"
 	backendconfig "github.com/rudderlabs/rudder-server/config/backend-config"
 	"github.com/rudderlabs/rudder-server/services/streammanager/common"
 	"github.com/rudderlabs/rudder-server/utils/awsutils"
@@ -15,14 +16,13 @@ import (
 
 // Config is the config that is required to send data to Lambda
 type destinationConfig struct {
-	InvocationType string
-	ClientContext  string
-	Lambda         string
+	InvocationType string `json:"invocationType"`
+	ClientContext  string `json:"clientContext"`
+	Lambda         string `json:"lambda"`
 }
 
 type inputConfig struct {
-	Payload           string             `json:"payload"`
-	DestinationConfig *destinationConfig `json:"destConfig"`
+	Payload string `json:"payload"`
 }
 
 type LambdaProducer struct {
@@ -56,7 +56,7 @@ func NewProducer(destination *backendconfig.DestinationT, o common.Opts) (*Lambd
 }
 
 // Produce creates a producer and send data to Lambda.
-func (producer *LambdaProducer) Produce(jsonData json.RawMessage, _ interface{}) (int, string, string) {
+func (producer *LambdaProducer) Produce(jsonData json.RawMessage, destConfig interface{}) (int, string, string) {
 	client := producer.client
 	if client == nil {
 		return 400, "Failure", "[Lambda] error :: Could not create client"
@@ -71,9 +71,14 @@ func (producer *LambdaProducer) Produce(jsonData json.RawMessage, _ interface{})
 	if input.Payload == "" {
 		return 400, "Failure", "[Lambda] error :: Invalid payload"
 	}
-	config := input.DestinationConfig
-	if config == nil {
-		return 400, "Failure", "[Lambda] error :: Invalid destination config"
+	var config destinationConfig
+	err = mapstructure.Decode(destConfig, &config)
+	if err != nil {
+		returnMessage := "[Lambda] error while unmarshalling destConfig :: " + err.Error()
+		return 400, "Failure", returnMessage
+	}
+	if config.InvocationType == "" {
+		config.InvocationType = "Event"
 	}
 
 	var invokeInput lambda.InvokeInput

services/streammanager/lambda/lambdamanager_test.go

@@ -17,9 +17,10 @@ import (
 )
 
 var (
-	sampleMessage  = "sample payload"
-	sampleFunction = "sample function"
-	invocationType = "Event"
+	sampleMessage       = "sample payload"
+	sampleFunction      = "sample function"
+	sampleClientContext = "sample client context"
+	invocationType      = "Event"
 )
 
 func TestNewProducer(t *testing.T) {
@@ -81,26 +82,6 @@ func TestProduceWithInvalidData(t *testing.T) {
 	assert.Equal(t, 400, statusCode)
 	assert.Equal(t, "Failure", statusMsg)
 	assert.Contains(t, respMsg, "[Lambda] error :: Invalid payload")
-
-	// Destination Config not present
-	sampleEventJson, _ = json.Marshal(map[string]interface{}{
-		"payload": sampleMessage,
-	})
-	statusCode, statusMsg, respMsg = producer.Produce(sampleEventJson, map[string]string{})
-	assert.Equal(t, 400, statusCode)
-	assert.Equal(t, "Failure", statusMsg)
-	assert.Contains(t, respMsg, "[Lambda] error :: Invalid destination config")
-
-	// Invalid Destination Config
-	sampleDestConfig := map[string]interface{}{}
-	sampleEventJson, _ = json.Marshal(map[string]interface{}{
-		"payload":    sampleMessage,
-		"destConfig": "invalid dest config",
-	})
-	statusCode, statusMsg, respMsg = producer.Produce(sampleEventJson, sampleDestConfig)
-	assert.Equal(t, 400, statusCode)
-	assert.Equal(t, "Failure", statusMsg)
-	assert.Contains(t, respMsg, "[Lambda] error while unmarshalling jsonData")
 }
 
 func TestProduceWithServiceResponse(t *testing.T) {
@@ -110,26 +91,26 @@ func TestProduceWithServiceResponse(t *testing.T) {
 	mockLogger := mock_logger.NewMockLogger(ctrl)
 	pkgLogger = mockLogger
 
-	sampleDestConfig := map[string]interface{}{
-		"Lambda":         sampleFunction,
-		"InvocationType": invocationType,
-	}
-
 	sampleEventJson, _ := json.Marshal(map[string]interface{}{
-		"payload":    sampleMessage,
-		"destConfig": sampleDestConfig,
+		"payload": sampleMessage,
 	})
 
+	destConfig := map[string]string{
+		"lambda":        sampleFunction,
+		"clientContext": sampleClientContext,
+	}
+
 	var sampleInput lambda.InvokeInput
 	sampleInput.SetFunctionName(sampleFunction)
 	sampleInput.SetPayload([]byte(sampleMessage))
 	sampleInput.SetInvocationType(invocationType)
+	sampleInput.SetClientContext(sampleClientContext)
 
 	mockClient.
 		EXPECT().
 		Invoke(&sampleInput).
 		Return(&lambda.InvokeOutput{}, nil)
-	statusCode, statusMsg, respMsg := producer.Produce(sampleEventJson, map[string]string{})
+	statusCode, statusMsg, respMsg := producer.Produce(sampleEventJson, destConfig)
 	assert.Equal(t, 200, statusCode)
 	assert.Equal(t, "Success", statusMsg)
 	assert.NotEmpty(t, respMsg)
@@ -141,7 +122,7 @@ func TestProduceWithServiceResponse(t *testing.T) {
 		Invoke(&sampleInput).
 		Return(nil, errors.New(errorCode))
 	mockLogger.EXPECT().Errorf(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Times(1)
-	statusCode, statusMsg, respMsg = producer.Produce(sampleEventJson, map[string]string{})
+	statusCode, statusMsg, respMsg = producer.Produce(sampleEventJson, destConfig)
 	assert.Equal(t, 500, statusCode)
 	assert.Equal(t, "Failure", statusMsg)
 	assert.NotEmpty(t, respMsg)
@@ -154,7 +135,7 @@ func TestProduceWithServiceResponse(t *testing.T) {
 			awserr.New(errorCode, errorCode, errors.New(errorCode)), 400, "request-id",
 		))
 	mockLogger.EXPECT().Errorf(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Times(1)
-	statusCode, statusMsg, respMsg = producer.Produce(sampleEventJson, map[string]string{})
+	statusCode, statusMsg, respMsg = producer.Produce(sampleEventJson, destConfig)
 	assert.Equal(t, 400, statusCode)
 	assert.Equal(t, errorCode, statusMsg)
 	assert.NotEmpty(t, respMsg)