Historical crypto value conversion. Eg get the AUD value of half a BTC on some date in the past

value.sh

#!/bin/bash
ts=$(date -j -f "%Y%m%d" "$1" "+%s")
from=$2
to=$3
convert=$4

result=$(curl -s "https://min-api.cryptocompare.com/data/pricehistorical?fsym=${from}&tsyms=${to}&ts=${ts}")
toValue=$(echo ${result} | jq -r ".${from}.AUD")

echo "${to}: ${toValue}"
echo "${toValue}*${convert}" | bc

Usage:

$ ./value.sh 20170716 BTC AUD 0.0005077
AUD: 2571.8
1.3057028