Auto-delegation for cosmos based networks

delegation.sh

#!/bin/bash -e

BINARY="" 			    #Name of the cli binary to execute. eg - gaiacli, akashctl etc.
KEY=""					#Name of the the key name 
DENOM=""				#Denomination of the token. eg - uatom, uakt etc.
MINIMUM_AMOUNT=""		#Min amount to be delegated. If the reward is less than this number deleagtion will not ake place
VALIDATOR=""			#Validator address to deleagte to 
CHAIN_ID=""				#Chain id of the nework
NODE=""					#External node to connect to
FEE=""$DENOM			#Fees to attach with the transaction.

# For executing this script it is assumed the passphrase is exported as env variable in form of PASSPHRASE='' in a screen session for security purpose.  


while true
do

COMMISSION_QUERY=$(${BINARY} query distribution commission ${VALIDATOR} --chain-id ${CHAIN_ID} --node ${NODE} --output json)
if [ "${COMMISSION_QUERY}" == "null" ]
then
    # Checking to see if query returns empty response.
    COMMISSION="0"
else
    COMMISSION=$(echo ${COMMISSION_QUERY} | jq -r ".[] | select(.denom == \"${DENOM}\") | .amount" || true)
    if [ -z "${COMMISSION_QUERY}" ]
    then
        # If the respoonse is 0 there is no commission for this address present.
        COMMISSION="0"
    else
        # Truncating to remove decimals.
        COMMISSION=${COMMISSION%.*}
    fi
fi


echo "Rewards for address is ${COMMISSION}${DENOM}"

if [ ${COMMISSION} -gt ${MINIMUM_AMOUNT} ] 
then
    echo "Withdrawing rewards"
    
    { 
      echo "${PASSPHRASE}"
      echo "${PASSPHRASE}"
    } | ${BINARY} tx distribution withdraw-rewards ${VALIDATOR} --commission -y --from ${KEY} --chain-id ${CHAIN_ID} --node ${NODE} --fees ${FEE}
    
    sleep 30
    
    echo "Delegating ${COMMISSION}${DENOM} tokens to validator ${VALIDATOR}"
    
    { 
      echo "${PASSPHRASE}"
      echo "${PASSPHRASE}"
    } | ${BINARY} tx staking delegate ${VALIDATOR} ${COMMISSION}${DENOM} --yes --from ${KEY} --chain-id ${CHAIN_ID} --node ${NODE} --fees ${FEE}
    
    sleep 30
fi
echo "Sleeping for 2 days"
sleep 172800
done