SNS FIFO がサポートされています。SNS トピックにサブスクライブする SQS キューを作成する際に、覚えておくべき重要な点があります。SNS トピックがメッセージを SQS キューに送信できるようにする必要があります。
			
{
  "Version": "2008-10-17",
  "Id": "__default_policy_ID",
  "Statement": [
    {
      "Sid": "__owner_statement",
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws:iam::780560123482:root"
      },
      "Action": "SQS:*",
      "Resource": "arn:aws:sqs:eu-west-1:780560123482:QueueSub.fifo"
    },
    {
      "Effect": "Allow",
      "Principal": {
        "Service": "sns.amazonaws.com"
      },
      "Action": "SQS:SendMessage",
      "Resource": "arn:aws:sqs:eu-west-1:780560123482:QueueSub.fifo",
      "Condition": {
        "ArnLike": {
          "aws:SourceArn": "arn:aws:sns:eu-west-1:780410022472:Order.fifo"
        }
      }
    }
  ]
}
{
  "Version": "2008-10-17",
  "Id": "__default_policy_ID",
  "Statement": [
    {
      "Sid": "__owner_statement",
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws:iam::780560123482:root"
      },
      "Action": "SQS:*",
      "Resource": "arn:aws:sqs:eu-west-1:780560123482:QueueSub.fifo"
    },
    {
      "Effect": "Allow",
      "Principal": {
        "Service": "sns.amazonaws.com"
      },
      "Action": "SQS:SendMessage",
      "Resource": "arn:aws:sqs:eu-west-1:780560123482:QueueSub.fifo",
      "Condition": {
        "ArnLike": {
          "aws:SourceArn": "arn:aws:sns:eu-west-1:780410022472:Order.fifo"
        }
      }
    }
  ]
}
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