Retrieving Nsec and Npub from Atomstr database

Atomstr_Hex_to_Nsec.sh

#/bin/bash
clear
echo
echo " Welcome to"
echo
echo " --- Atomstr Hex to Nsec keys convertor ---"
echo
echo "                             by PastaGringo"
echo
echo "Checking if Docker is installed..."
if ! command -v docker &> /dev/null
then
	echo "Docker is not installed ❌"
    	echo "Please install Docker before running this script."
	echo
    exit 1
fi
echo "Docker is installed ✅"
echo
echo "Checking if sqlite3 is installed..."
if ! command -v sqlite3 &> /dev/null
then
        echo "=> sqlite3 is not installed ❌"
        echo "Please install sqlite3 before running this script."
	echo
    exit 1
fi
echo "=> sqlite3 is installed ✅"
echo
echo "Checking if the file atomstr.db is in the current directory..."
if ! test -f ./atomstr.db; then
  	echo "=> atomstr.db is not into the current directory! ❌"
	echo "Please run script the again where the atomstr.db file is located."
	echo
	exit 1
else
	echo "=> atomstr.db is well in the directory! ✅"
fi
echo
read -p "Please enter the Atomstr container name or ID [default is container name: atomstr] " name
name=${name:-atomstr}
echo $name
echo
echo "Checking if container $name exists..."
output=$( docker ps -a -f name=$name | grep $name 2> /dev/null )
if [[ ! -z ${output} ]];
then
	echo "=> A container with a name $name EXISTS and has status: $( echo ${output} | awk '{ print $7 }' ) ✅"
else
	echo "=> Container with a name: testContainer does not exist"
	exit 1
fi
echo
echo "Pulling the magical docker image from rot13maxi (https://github.com/rot13maxi/key-convertr) ..."
docker pull ghcr.io/rot13maxi/key-convertr:main --quiet
echo "=> Pulling done ✅"
echo
echo "Grabbing all the feeds from $name..."
feeds=$(sqlite3 ./atomstr.db 'select * from feeds')
echo
k=1
for feed in ${feeds//\\n/
}
do
	j=1
	echo "Feed [$k] is : $feed"
	IFS='|' read -ra item <<< "$feed"
	for i in "${item[@]}"; do
	char_count=${#i}
		if [[ $char_count -eq 64 ]]
		then
			if [[ $j -eq 1 ]]
			then
  				echo "HEX PUB = $i"
				npub=$(docker run --rm ghcr.io/rot13maxi/key-convertr:main --kind npub $i)
				echo "=> NPUB KEY : $npub"
				j=$((j + 1))
			else
				echo "HEX NSEC = $i"
				nsec=$(docker run --rm ghcr.io/rot13maxi/key-convertr:main --kind nsec $i)
				echo "=> NSEC KEY : $nsec"
			fi
		fi
	done
	k=$((k + 1))
	echo
done
echo "Everything done! Have a good day!"