#!/bin/bash

set -x

topic="$1"
last="$2"
timeout="$3"

cur=$(ipfs name resolve --nocache "$topic")

if [ "$cur" != "$last" ]; then
	exit 1
fi

timeout "${timeout}s" ipfs pubsub sub "$topic" 2>/dev/null | while read VALUE; do
	pkill -P $$
	cur=$(ipfs name resolve --nocache "$topic")
	if [ "$cur" != "$last" ]; then
		exit 1
	fi
	exit 0
done

cur=$(ipfs name resolve --nocache "$topic")
if [ "$cur" != "$last" ]; then
	exit 1
fi

exit 0