Script to calculate your crypto balance, as well as give (50) historical values. Historical values help in deciding whether to invest or not.

crypto_summary.sh

#!/bin/bash

# Number of units of each cryptocurrency.
u_bc=0.73674311
u_eth=0.75795629
u_rip=251.065810

# Get prices of each from https://api.coingecko.com/api/v3/coins/list
bc=`curl "https://api.coingecko.com/api/v3/coins/markets?vs_currency=inr&ids=bitcoin" 2> /dev/null | jq . | grep current_price | awk '{print $NF}' | cut -d, -f1 &`
eth=`curl "https://api.coingecko.com/api/v3/coins/markets?vs_currency=inr&ids=ethereum"  2> /dev/null | jq . | grep current_price | awk '{print $NF}' | cut -d, -f1 &`
rip=`curl "https://api.coingecko.com/api/v3/coins/markets?vs_currency=inr&ids=ripple"  2> /dev/null | jq . | grep current_price | awk '{print $NF}' | cut -d, -f1 &`

wait

# Calculate value of each cryptocurrency
bcv=`echo "$u_bc * $bc" | bc -l | cut -d. -f1`
ethv=`echo "$u_eth * $eth" | bc -l | cut -d. -f1`
ripv=`echo "$u_rip * $rip" | bc -l | cut -d. -f1`

# Calculate previous value of each cryptocurrency and percentage change.
if [ -f prev_output.1 ]
then
	p_bc=`grep -w "Bitcoin " prev_output.1 | awk '{print $4}'`
	p_bcv=`grep -w "Bitcoin " prev_output.1 | awk '{print $6}'`
	p_eth=`grep -w "Ethereum " prev_output.1 | awk '{print $4}'`
	p_ethv=`grep -w "Ethereum " prev_output.1 | awk '{print $6}'`
	p_rip=`grep -w "Ripple " prev_output.1 | awk '{print $4}'`
	p_ripv=`grep -w "Ripple " prev_output.1 | awk '{print $6}'`

	bc_perc=`echo "scale=1; ($bcv - $p_bcv) * 100 / $p_bcv" | bc -l`
	eth_perc=`echo "scale=1; ($ethv - $p_ethv) * 100 / $p_ethv" | bc -l`
	rip_perc=`echo "scale=1; ($ripv - $p_ripv) * 100 / $p_ripv" | bc -l`
else
	p_bc=0
	p_bcv=0
	p_eth=0
	p_ethv=0
	p_rip=0
	p_ripv=0
	bc_perc=0
	eth_perc=0
	rip_perc=0
fi

# Let her rip....
(
printf -- "---------------------------------------------------------------------------------------\n"
printf "%-15s%-15s%-10s%-10s%-10s%-10s%-10s%-10s\n" "Coin" "Quantity" "PRate" "Rate" "PValue" "Value" "Change" "%"
printf -- "---------------------------------------------------------------------------------------\n"
printf "%-15s%-15s%-10s%-10s%-10s%-10s%-10s%-10s\n" "Bitcoin" $u_bc $p_bc $bc $p_bcv $bcv $((bcv-p_bcv)) $bc_perc
printf "%-15s%-15s%-10s%-10s%-10s%-10s%-10s%-10s\n" "Ethereum" $u_eth $p_eth $eth $p_ethv $ethv $((ethv-p_ethv)) $eth_perc
printf "%-15s%-15s%-10s%-10s%-10s%-10s%-10s%-10s\n" "Ripple" $u_rip $p_rip $rip $p_ripv $ripv $((ripv-p_ripv)) $rip_perc
printf -- "---------------------------------------------------------------------------------------\n"

total=`echo "$bcv + $ethv + $ripv" | bc -l`
prev_total=`echo "$p_bcv + $p_ethv + $p_ripv" | bc -l`
printf "%-15s = %-15s" "Total" $total
if [ $prev_total -gt 0 ]
then
	change=`echo "$total - $prev_total" | bc`
	perc=`echo "scale=2; $change * 100 / $prev_total" | bc -l`

	printf "%-15s = %-15s" "Prev Total" $prev_total
	printf "%-15s = %-15s (%s%%)" "Change" $change $perc
fi
printf "\n"
) | tee prev_output.0

if [ $# -eq  1 ]
then
	echo "TEST-RUN: Not saving/preserving files"
	rm -f prev_output.0
	exit 0
fi

for i in {49..0}
do
	if [ -f prev_output.$i ]
	then
		j=$((i+1))
		mv prev_output.$i prev_output.$j
	fi
done

echo "------------------ Recent historical prices ------------------"
for i in {2..50}
do
	if [ -f prev_output.$i ]
	then
		ts=`ls -l prev_output.$i | cut -c 40-51`
		echo "##### prev_output.$i ($ts) #####"
		egrep "Bitcoin|Ethereum|Ripple" prev_output.$i | awk '{printf "%-20s%10s%%\n", $1, $NF}'
	fi
done

exit 0

Sample output:

$ ./cryto_summary.sh
---------------------------------------------------------------------------------------
Coin           Quantity       PRate     Rate      PValue    Value     Change    %
---------------------------------------------------------------------------------------
Bitcoin        0.73674311     2706360   2752272   1993892   2027717   33825     1.6
Ethereum       0.75795629     179484    180247    136041    136619    578       .4
Ripple         251.065810     45.11     44.9      11325     11272     -53       -.4
---------------------------------------------------------------------------------------
Total           = 2175608        Prev Total      = 2141258        Change          = 34350           (1.60%)
------------------ Recent historical prices ------------------
##### prev_output.2 (Jan 27 11:48) #####
Bitcoin             .3%
Ethereum            .1%
Ripple              .6%
##### prev_output.3 (Jan 27 10:17) #####
Bitcoin             -5.7%
Ethereum            -8.4%
Ripple              -5.5%
##### prev_output.4 (Jan 26 23:09) #####
Bitcoin             2.1%
Ethereum            6.0%
Ripple              1.5%
##### prev_output.5 (Jan 26 13:19) #####
Bitcoin             -1.0%
Ethereum            -1.0%
Ripple              -.7%
##### prev_output.6 (Jan 26 11:23) #####
Bitcoin             2.5%
Ethereum            2.0%
Ripple              3.4%
##### prev_output.7 (Jan 25 22:18) #####
Bitcoin             1.5%
Ethereum            1.0%
Ripple              1.1%
##### prev_output.8 (Jan 25 17:40) #####
Bitcoin             .1%
Ethereum            .7%
Ripple              .5%
##### prev_output.11 (Jan 25 09:43) #####
Bitcoin             .9%
Ethereum            1.2%
Ripple              .4%
##### prev_output.12 (Jan 25 07:14) #####
Bitcoin             4.7%
Ethereum            5.7%
Ripple              3.7%
##### prev_output.13 (Jan 24 22:41) #####
Bitcoin             2.3%
Ethereum            2.1%
Ripple              1.7%