feat(aws-sns-sqs): added sqsSubscriptionProps (#700)

* added sqsSubscriptionProps

* add encryption key to dlq

Co-authored-by: biffgaut <[email protected]>

Author: mickychetta

source/patterns/@aws-solutions-constructs/aws-sns-sqs/README.md

@@ -107,6 +107,7 @@ constructStack.getEncryptionKey().addToResourcePolicy(policyStatement);
 |enableEncryptionWithCustomerManagedKey?|`boolean`|Use a KMS Key, either managed by this CDK app, or imported. If importing an encryption key, it must be specified in the encryptionKey property for this construct.|
 |encryptionKey?|[`kms.Key`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-kms.Key.html)|An optional, imported encryption key to encrypt the SQS queue, and SNS Topic.|
 |encryptionKeyProps?|[`kms.KeyProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-kms.KeyProps.html)|An optional, user provided properties to override the default properties for the KMS encryption key.|
+|sqsSubscriptionProps?|[`subscriptions.SqsSubscriptionProps`](https://docs.aws.amazon.com/cdk/api/v1/docs/@aws-cdk_aws-sns-subscriptions.SqsSubscriptionProps.html)|Optional user-provided props to override the default props for sqsSubscriptionProps.|
 
 ## Pattern Properties
 

source/patterns/@aws-solutions-constructs/aws-sns-sqs/lib/index.ts

@@ -87,6 +87,12 @@ export interface SnsToSqsProps {
      * @default - Default props are used.
      */
     readonly encryptionKeyProps?: kms.KeyProps
+    /**
+     * Optional user-provided props to override the default props for sqsSubscriptionProps.
+     *
+     * @default - Default props are used.
+     */
+     readonly sqsSubscriptionProps?: subscriptions.SqsSubscriptionProps
 }
 
 /**
@@ -152,7 +158,7 @@ export class SnsToSqs extends Construct {
       });
 
       // Setup the SQS queue subscription to the SNS topic
-      this.snsTopic.addSubscription(new subscriptions.SqsSubscription(this.sqsQueue));
+      this.snsTopic.addSubscription(new subscriptions.SqsSubscription(this.sqsQueue, props.sqsSubscriptionProps));
 
       // Grant SNS service access to the SQS queue encryption key
       if (this.sqsQueue.encryptionMasterKey) {