fix: use the current aws partition (#133)

Author: carterjones

README.md

@@ -107,6 +107,7 @@ To run the tests:
 | [aws_caller_identity](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/caller_identity) |
 | [aws_cloudwatch_log_group](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_log_group) |
 | [aws_iam_policy_document](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) |
+| [aws_partition](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/partition) |
 | [aws_region](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/region) |
 | [aws_sns_topic](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/sns_topic) |
 | [aws_sns_topic_subscription](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/sns_topic_subscription) |

main.tf

@@ -1,4 +1,5 @@
 data "aws_caller_identity" "current" {}
+data "aws_partition" "current" {}
 data "aws_region" "current" {}
 
 resource "aws_sns_topic" "this" {
@@ -15,7 +16,7 @@ locals {
   sns_topic_arn = element(
     concat(
       aws_sns_topic.this.*.arn,
-      ["arn:aws:sns:${data.aws_region.current.name}:${data.aws_caller_identity.current.account_id}:${var.sns_topic_name}"],
+      ["arn:${data.aws_partition.current.id}:sns:${data.aws_region.current.name}:${data.aws_caller_identity.current.account_id}:${var.sns_topic_name}"],
       [""]
     ),
     0,