Add RPC API endpoint env (#156)

* add eth1 flag

* fix eth1 flag

* fix rpc flag

Author: DiogoSantoss

.env.sample.holesky

@@ -78,6 +78,9 @@ CHARON_P2P_RELAYS=https://0.relay.obol.tech,https://1.relay.obol.tech/,https://c
 # Increase the duration charon will wait while publishing data to the beacon node
 #CHARON_BEACON_NODE_SUBMIT_TIMEOUT=
 
+# The address of the execution engine JSON-RPC API. 
+#CHARON_EXECUTION_CLIENT_RPC_ENDPOINT=
+
 # Override the charon logging level; debug, info, warning, error.
 #CHARON_LOG_LEVEL=
 

.env.sample.hoodi

@@ -78,6 +78,9 @@ CHARON_P2P_RELAYS=https://0.relay.obol.tech,https://1.relay.obol.tech/,https://c
 # Increase the duration charon will wait while publishing data to the beacon node
 #CHARON_BEACON_NODE_SUBMIT_TIMEOUT=
 
+# The address of the execution engine JSON-RPC API. 
+#CHARON_EXECUTION_CLIENT_RPC_ENDPOINT=
+
 # Override the charon logging level; debug, info, warning, error.
 #CHARON_LOG_LEVEL=
 

.env.sample.mainnet

@@ -72,6 +72,9 @@ CHARON_P2P_RELAYS=https://0.relay.obol.tech,https://1.relay.obol.tech/,https://c
 # Increase the duration charon will wait while publishing data to the beacon node
 #CHARON_BEACON_NODE_SUBMIT_TIMEOUT=
 
+# The address of the execution engine JSON-RPC API. 
+#CHARON_EXECUTION_CLIENT_RPC_ENDPOINT=
+
 # Override the charon logging level; debug, info, warning, error.
 #CHARON_LOG_LEVEL=
 

docker-compose.yml

@@ -101,6 +101,7 @@ services:
       - CHARON_LOKI_ADDRESSES=${CHARON_LOKI_ADDRESSES:-http://loki:3100/loki/api/v1/push}
       - CHARON_LOKI_SERVICE=charon
       - CHARON_NICKNAME=${CHARON_NICKNAME:-}
+      - CHARON_EXECUTION_CLIENT_RPC_ENDPOINT=${CHARON_EXECUTION_CLIENT_RPC_ENDPOINT:-http://nethermind:8545}
     ports:
       - ${CHARON_PORT_P2P_TCP:-3610}:${CHARON_PORT_P2P_TCP:-3610}/tcp # P2P TCP libp2p
     networks: [dvnode]