refactor/simplify peer configuration

pillar.example

       fwmark: 0x1
       private_key: secret
       preshared_key: secret
-  peers:
-    wgtest:
-      -
-        peer: 1ymBfBty05PNhD/QJKUlu4aL2p4jKSWVVqVQWIQG6wM=
-        endpoint: '127.0.0.1:1338'
-        allowed_ips:
-          - 10.0.0.2/32
-          - 'fdff::2/128'
-	persistent_keepalive: 25
-      -
-        peer: 2ymBfBty05PNhD/QJKUlu4aL2p4jKSWVVqVQWIQG6wM=
-        endpoint: '127.0.0.1:1339'
-        allowed_ips:
-          - 10.0.0.3/32
-          - 'fdff::3/128'
+      peers:
+        - peer: 1ymBfBty05PNhD/QJKUlu4aL2p4jKSWVVqVQWIQG6wM=
+          endpoint: '127.0.0.1:1338'
+          allowed_ips:
+            - 10.0.0.2/32
+            - 'fdff::2/128'
+          persistent_keepalive: 25
+        - peer: 2ymBfBty05PNhD/QJKUlu4aL2p4jKSWVVqVQWIQG6wM=
+          endpoint: '127.0.0.1:1339'
+          allowed_ips:
+            - 10.0.0.3/32
+            - 'fdff::3/128'
 
   # optionally, a list of interfaces can be specified for which forwarding will
   # be set to 1 via sysctl.present

wireguard/init.sls

   pkg.installed:
     - name: {{ wireguard.package }}
 
-{% for name, values in salt['pillar.get']('wireguard:interfaces', {}).items() %}
-wireguard_{{ name }}:
+{% for interface, values in salt['pillar.get']('wireguard:interfaces', {}).items() %}
+wireguard_{{ interface }}:
   wg.present:
-    - name: {{ name }}
+    - name: {{ interface }}
 {% for k, v in values.items() %}
+{% if k in ['listen_port', 'fwmark', 'private_key', 'preshared_key'] %}
     - {{k}}: {{v}}
-{% endfor %}
-{% endfor %}
+{% endif %}
+{% endfor %} {# values.items() #}
 
-{% for interface, peerlist in salt['pillar.get']('wireguard:peers', {}).items() %}
-{% for peer in peerlist %}
+{% for peer in values.get('peers', {}) %}
 wireguard_{{ interface }}_peer_{{ peer.get('peer') }}:
   wg.peer_present:
     - interface: {{ interface }}
 {% endfor %}
 {% endif %}
 {% endfor %}
+
 {% endfor %}
 
+
 {% for interface in salt['pillar.get']('wireguard:set_forward_interfaces', []) %}
 net.ipv4.conf.{{interface}}.forwarding:
   sysctl.present: