Add an option to allow unprotected txs in geth (#8)

Part of [Update Optimism stack to use Bedrock release](https://www.notion.so/Update-Optimism-stack-to-use-Bedrock-release-e44a490247724a6095a9fbc19fba3bcd)
- Add an env option (`CERC_ALLOW_UNPROTECTED_TXS`) to allow unprotected (non `EIP155`) txs in fixturenet geth node (disables replay protection)
  - Required by `fixturenet-optimism`

Reviewed-on: #8
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

stack-orchestrator/compose/docker-compose-fixturenet-eth.yml

@@ -23,6 +23,7 @@ services:
     environment:
       CERC_REMOTE_DEBUG: ${CERC_REMOTE_DEBUG:-true}
       CERC_SCRIPT_DEBUG: ${CERC_SCRIPT_DEBUG}
+      CERC_ALLOW_UNPROTECTED_TXS: ${CERC_ALLOW_UNPROTECTED_TXS:-false}
     env_file:
       - ../config/fixturenet-eth/fixturenet-eth.env
     image: cerc/fixturenet-eth-geth:local

stack-orchestrator/container-build/cerc-fixturenet-eth-geth/run-el.sh

@@ -50,6 +50,12 @@ else
 
     echo -n "$JWT" > /opt/testnet/build/el/jwtsecret
 
+    OTHER_OPTS=""
+    if [ "$CERC_ALLOW_UNPROTECTED_TXS" == "true" ]; then
+      # Allow for unprotected (non EIP155) txs to be submitted via RPC
+      OTHER_OPTS+=" --rpc.allow-unprotected-txs"
+    fi
+
     $START_CMD \
       --datadir="${CERC_ETH_DATADIR}" \
       --bootnodes="${ENODE}" \