Bash (Unix shell): Getting Cryptocurrency Price Using API

Command:

$ cat cryptocurrency_price.sh


Result:

#!/bin/bash
if [ "$#" -ne 2 ]; then
echo "Usage: $0 PAIR AMOUNT" >&2
exit 1
fi
pair=$1; amount=$2; curl -s "https://coincheck.com/api/rate/$pair" | python -c "import sys, json; print float(json.load(sys.stdin)['rate']) * float(sys.argv[1])" $amount


Command:

$ ./cryptocurrency_price.sh


Result:

Usage: ./cryptocurrency_price_jpy.sh PAIR AMOUNT


Command:

$ ./cryptocurrency_price.sh btc_jpy 1


Result:

318146.0


Command:

$ ./cryptocurrency_price_jpy.sh eth_jpy 13.5


Result:

303218.972773


Command:

$ ./cryptocurrency_price_jpy.sh xem_jpy 1000


Result:

18703.59758