```while read -r hash; do

#validate hash isnt present already before downloading
is_valid=$(ipfs pin ls --type=recursive | grep "$hash");
echo "checking if $hash already present.."
if [ -z "$is_valid" ]
then
ipfs pin add -r $hash --timeout 250

else 
echo "We have this file already pinned. Skipping..."
fi
``` 
is essentially what i am doing at present