DRY up code, add GBP rates

site-cookbooks/kosmos-bitcoin/templates/btc-price-tracker-daily.sh.erb

@@ -4,7 +4,7 @@
 YESTERDAY=$(date -d "yesterday" +%Y-%m-%d)
 echo "Starting price tracking for $YESTERDAY" >&2
 
-# Function to get and process price data for a currency
+# Fetch and process rates for a fiat currency
 get_price_data() {
     local currency=$1
     local data avg open24 last
@@ -15,7 +15,6 @@ get_price_data() {
         open24=$(echo "$data" | jq -r '.open_24')
         last=$(echo "$data" | jq -r '.last')
         avg=$(( (${open24%.*} + ${last%.*}) / 2 ))
-        echo $avg
     else
         echo "ERROR: Failed to retrieve ${currency} price data" >&2
         exit 1
@@ -29,7 +28,6 @@ gbp_avg=$(get_price_data "GBP")
 
 # Create JSON
 json="{\"EUR\":$eur_avg,\"USD\":$usd_avg,\"GBP\":$gbp_avg}"
-echo "Rates: $json" >&2
 
 # PUT in remote storage
 response=$(curl -X PUT \