Add workaround cron job for publishing current VTC exchange rate locally to pricesUrl.

Author: Jon

get_vtc_exchange_rate.sh

@@ -0,0 +1,93 @@
+#!/bin/bash
+# 
+# Trivial temporary workaround to get VTC/USD exchange rate in native Bitpay JSON format for coinpunk.
+#
+# Yes, this is a very ugly and inneficient hack. Feel free to improve or rewrite in vertpunk directly.
+#
+# Add to Cron for the vertpunk user via "crontab -u vertpunk -e" to get new pricing every 15 mins
+# 0,15,30,45 * * * * /path/to/get_vtc_exchange_rate.sh >> /path/to/vtcusd.log 2>&1
+#
+# 
+# Edit your vertpunk config.json and change pricesUrl to http://localhost:8080/rates.json
+#
+#set -x
+
+. /etc/profile
+
+# Where to write stuff
+TMPDIR=/tmp
+OUTPUTFILE=/home/vertpunk/vertpunk/public/rates.json
+
+PID=$$
+
+# Functions
+clean_up () {
+	rm $TMPDIR/*.tmp.$PID
+}
+
+get_btc_rates () {
+echo "Getting BTC Exchange Rates from Bitpay..."
+curl -s -f --retry 5 "https://bitpay.com/api/rates" > $TMPDIR/rates.tmp.$PID
+STATUS=$?
+BTCRATES=`cat $TMPDIR/rates.tmp.$PID`
+}
+
+calc_btc_usd () {
+echo "Isolating BTC Price..."
+BTCUSD="`echo $BTCRATES | awk -F\} '{print $1}' | awk -F: '{print $4}'`"
+BTCUSD=${BTCUSD//[[:space:]]/}
+echo "Current BTC Value is \$$BTCUSD..."
+}
+
+get_vtc_btc () {
+echo "Getting Cryptsy VTC-BTC Exchange Rate..."
+#curl --retry 5 "http://pubapi.cryptsy.com/api.php?method=singlemarketdata\&marketid=151" > $TMPDIR/cryptsy.tmp.$PID
+#cat $TMPDIR/cryptsy.tmp.$PID |  awk -F, '{print $4}'|awk -F\" '{print $4}' > $TMPDIR/vtcbtc.tmp.$PID
+# Single Order Data API seems to be marginally more reliable...
+curl -s -f --retry 5 "http://pubapi.cryptsy.com/api.php?method=singleorderdata&marketid=151" > $TMPDIR/cryptsy.tmp.$PID
+cat $TMPDIR/cryptsy.tmp.$PID | awk -F :\" '{print $8}'|cut -b 1-8 > $TMPDIR/vtcbtc.tmp.$PID
+VTCBTC=`cat $TMPDIR/vtcbtc.tmp.$PID`
+VTCBTC=${VTCBTC//[[:space:]]/}
+}
+
+output_vtc_usd () {
+echo "Current VTC exchange rate is $VTCBTC BTC..."
+echo "Converting VTC-BTC to VTC-USD..."
+VTCUSD=$(echo "scale=4; $BTCUSD*$VTCBTC" | bc)
+echo "Current VTC value in USD is \$$VTCUSD"
+echo "Writing VTC/USD rate to local file..."
+echo -n '[{"code":"USD","name":"US Dollar","rate":' > $OUTPUTFILE
+echo -n $VTCUSD >> $OUTPUTFILE
+echo "}]" >> $OUTPUTFILE
+}
+
+# Let's Go
+
+# Get BTC Rates from BitPay
+echo "Started $0 on `date +%c`"
+get_btc_rates
+
+if [[ ! -z "$BTCRATES" ]] ; then
+	# Isolate USD value from API output
+	calc_btc_usd
+	# Get VTC/BTC Rate from Cryptsy
+	get_vtc_btc
+	if [[ ! -z "$VTCBTC" ]] ; then
+		# Calcualte VTC/USD
+		output_vtc_usd
+	else
+		echo "Cryptsy API appears to be down. Curl exited with status $STATUS..."
+		clean_up
+		echo "Unable to convert, please try again later."
+		exit 1
+	fi
+else
+	echo "Bitpay API appears to be down. Curl exited with status $STATUS..."
+	clean_up
+	echo "Unable to convert, please try again later."
+	exit 1
+fi
+
+clean_up
+echo "Finished!"
+exit 0