terraform 0.12

outputs.tf

 output "whitelist_id" {
-  value = ["${cloudflare_access_rule.whitelisted_ip.*.id}"]
+  value = [cloudflare_access_rule.whitelisted_ip.*.id]
 }
 
 output "blacklist_id" {
-  value = ["${cloudflare_access_rule.blacklisted_ip.*.id}"]
+  value = [cloudflare_access_rule.blacklisted_ip.*.id]
 }
 
 # does not work
 # output "whitelist_zone_id" {
 #   value = ["${cloudflare_access_rule.whitelisted_ip.*.zone_id}"]
 # }
-

rule.tf

 # whitelist an IP
 resource "cloudflare_access_rule" "whitelisted_ip" {
-  count = "${length(var.whitelist_ips)}"
-  notes = "${var.notes}"
+  count = length(var.whitelist_ips)
+  notes = var.notes
   mode  = "whitelist"
 
-  configuration {
+  configuration = {
     target = "ip_range"
-    value  = "${element(var.whitelist_ips, count.index)}"
+    value  = element(var.whitelist_ips, count.index)
   }
 }
 
 # blacklist an IP
 resource "cloudflare_access_rule" "blacklisted_ip" {
-  count = "${length(var.blacklist_ips)}"
-  notes = "${var.notes}"
+  count = length(var.blacklist_ips)
+  notes = var.notes
   mode  = "block"
 
-  configuration {
+  configuration = {
     target = "ip_range"
-    value  = "${element(var.blacklist_ips, count.index)}"
+    value  = element(var.blacklist_ips, count.index)
   }
 }
+

variables.tf

@@ -19,11 +19,12 @@ variable "zone" {
 }
 
 variable "whitelist_ips" {
-  type    = "list"
+  type    = list(string)
   default = []
 }
 
 variable "blacklist_ips" {
-  type    = "list"
+  type    = list(string)
   default = []
 }
+