Bash script for running multiple Fusenet validator nodes on a single server

run_validators.sh

#!/bin/bash

set -e

START_NODE_NUM=1
END_NODE_NUM=3
ENV_FILE=".env"
HOMEPATH="/home/fuse"

function getAndUpdateBlockNumbers {
    #CURL the api calls and extract the current blocks
    FUSEBLOCK=$((`curl -s --data '{"method":"eth_blockNumber","params":[],"id":1,"jsonrpc":"2.0"}' -H "Content-Type: application/json" -X POST $HOME_RPC_URL | grep -o "\w*0x\w*"`))
    ETHBLOCK=$((`curl -s --data '{"method":"eth_blockNumber","params":[],"id":1,"jsonrpc":"2.0"}' -H "Content-Type: application/json" -X POST $FOREIGN_RPC_URL:8545 | grep -o "\w*0x\w*"`))

    echo "Current fuse block: $FUSEBLOCK"
    echo "Current eth block: $ETHBLOCK"

  if [[ "$ETHBLOCK" == 0 ]]; then
      echo "Could not pull mainnet block please check your foreign RPC config"
      exit 1
  fi

  if [[ "$FUSEBLOCK" == 0 ]]; then
      echo "Could not pull fuse block please check your fuse RPC config"
      exit 1
  fi
  #Open the env file and replace the exsisting block numbers with the new ones.
  #NOTE: this assumes that the env file only contains one line for HOME/FOREIGN_START_BLOCK
  sed -i "s/^HOME_START_BLOCK.*/HOME_START_BLOCK=${FUSEBLOCK}/" "$ENV_FILE"
  sed -i "s/^FOREIGN_START_BLOCK.*/FOREIGN_START_BLOCK=${ETHBLOCK}/" "$ENV_FILE"
echo -e "\nUpdating block numbers in $ENV_FILE"
}

for (( c=$START_NODE_NUM; c<=$END_NODE_NUM; c++ ))
  do
      ENV_FILE="$HOMEPATH/nodes/fuse-validator$c/.env"
      export $(grep -v '^#' "$ENV_FILE" | xargs)
      echo "updating block numbers"
      getAndUpdateBlockNumbers
      echo "done updating block numbers"
      cd "$HOMEPATH/nodes/fuse-validator$c/"
      echo "running quickstart"
      /bin/bash "./quickstart.sh"
      echo "$ENV_FILE"
      echo "/bin/bash fuse-validator$i"
  done

Validator node directories should be named /home/WhateverYourUsernameis/fuse-validatorX

e.g.:
/home/myname/fuse-validator1
/home/myname/fuse-validator2
/home/myname/fuse-validator3

START_NODE_NUM must be your first node (1 in this example)
END_NODE_NUM must be your last node (3 in this example)

HOMEPATH should be the path to the main directory where all validators are kept