Cosmos SDK : Auto delegate rewards using authz + feegrant

autodelegate.sh

# all the below params are required.
granter=
grantee=
fee_payer=
validator=cosmosvaloper1ddle9tczl87gsvmeva3c48nenyng4n56nghmjk
maintenance_balance=1000000 # minimum balance to maintain in the granter account

while true
do
	echo "About to withdraw commission and reward"
	gaiad tx distribution withdraw-rewards $validator --from $granter --chain-id cosmoshub-4 -y --generate-only > rewards.json
	gaiad tx authz exec rewards.json --chain-id cosmoshub-4 --node https://rpc.cosmoshub.forbole.com:443 --fees 200uatom --fee-account $fee_payer --from $grantee -y
	echo "Sleeping for 30s"
	sleep 30s
	
	amount=$(gaiad query bank balances $granter --chain-id=cosmoshub-4 --node https://rpc.cosmoshub.forbole.com:443 -o json | jq -r '.balances[0].amount')
	echo "amount after withdraw rewards: $amount"
	amount=$(($amount - $maintenance_balance))
	if [[ $amount > 0 && $amount != "null" ]]; then
		    echo "About to stake ${amount} uATOM"
		    gaiad tx staking delegate $validator ${amount}uatom --chain-id=cosmoshub-4 --from $granter --gas-adjustment 1.1 -y --generate-only > stake.json
		    gaiad tx authz exec stake.json --chain-id cosmoshub-4 --node https://rpc.cosmoshub.forbole.com:443 --fees 200uatom --fee-account $fee_payer --from $grantee -y
	fi
	sleep 3600s
done

make public