sepolia: implement and configure "payload_builder" feature for node-02

Refers: status-im/nimbus-eth2#3883

Signed-off-by: Artur Marud <[email protected]>

ansible/vars/nimbus-sepolia-metal.yml

@@ -23,9 +23,11 @@ geth_websocket_port: '{{ 9546 + idx|int + 11 }}'
 # Beacon Nodes
 beacon_node_service_name: 'beacon-node-{{ beacon_node_network }}-{{ beacon_node_repo_branch }}-{{ "%02d"|format(idx|int+1) }}'
 beacon_node_network: 'sepolia'
-beacon_node_repo_branch: 'unstable'
+beacon_node_repo_branch: '{{ node.get("branch", "unstable") }}'
 beacon_node_nim_commit: '{{ node.get("nim_commit", "") }}'
 beacon_node_build_nim_flags: '-d:noSignalHandler {{ node.get("nim_flags", "") }}'
+beacon_node_payload_builder_enabled: '{{ node.get("payload_builder_enabled", false) }}'
+beacon_node_payload_builder_url: 'https://builder-relay-sepolia.flashbots.net/'
 
 #Builds
 beacon_node_build_frequency: 'daily'
@@ -48,6 +50,6 @@ beacon_node_rest_address:   '0.0.0.0'
 nodes_layout:
   'metal-01.he-eu-hel1.nimbus.kiln':
     - { start:  0, end:  25 }
-    - { start: 25, end:  50 }
+    - { start: 25, end:  50, nim_commit: 'version-1-6', branch: 'mev-register-validators', payload_builder_enabled: true  }
     - { start: 50, end:  75, nim_commit: 'version-1-6' }
     - { start: 75, end: 100, nim_flags: '-d:json_rpc_websocket_package=websock' }