{
  "Statement":[
    {"Condition":
      {"ArnLike":{"AWS:SourceArn":"arn:aws:sns:us-east-1:123456789012:lambda_topic"}},
      "Resource":"arn:aws:lambda:us-east-1:123456789023:function:messageStore",
      "Action":"lambda:invokeFunction",
      "Principal":{"Service":"sns.amazonaws.com"},
      "Sid":"sns invoke","Effect":"Allow"
    }],
  "Id":"default",
  "Version":"2012-10-17"
}