Add supply inflation

supply/index.html

@@ -73,6 +73,7 @@
                                 Shielded Percent:<h2 class="halving4lang" id="zfundspercent">... </h2>
                                 Percent Circulating: <h2 id="percentcirculating">... HUSH</h2>
                                 Total Supply:<h2 class="halving3lang">21,000,000 HUSH</h2>
+                                Supply Inflation: <h2 id="inflation"> ... % monthly, ... % yearly</h2>
                             </p>
                         </div>
                         <br>
@@ -214,6 +215,13 @@ $('.button-group').each( function( i, buttonGroup ) {
                 $('#totalsupply').html( json.total + " HUSH" );
                 $('#percentcirculating').html( parseFloat( 100*(json.total/ 21000000)).toPrecision(4) + "%" );
 
+                var block_time        = 75;
+                var blocks_per_day    = 60*60*24 / block_time;
+                var monthly_inflation = parseFloat( 100 * (blocks_per_day * 30 / json.total)).toPrecision(2);
+                var yearly_inflation  = parseFloat( 100 * (blocks_per_day * 365 / json.total)).toPrecision(2);
+
+                $('#inflation').html( monthly_inflation + "% monthly, " + yearly_inflation + "% yearly" );
+
                 $.ajax({
                     url: "https://api.coingecko.com/api/v3/simple/price?ids=hush&vs_currencies=btc%2Cusd%2Ceur&include_market_cap=true&include_24hr_vol=true&include_24hr_change=true",
                     type: "GET",
@@ -232,6 +240,7 @@ $('.button-group').each( function( i, buttonGroup ) {
                     log("zmcap=" + zmcap);
                 })
                 .fail(function( xhr, status, errorThrown ) {
+                    log("Failed to get price data")
                 })
                 .always(function( xhr, status ) {
                     log("Finished!");
@@ -239,6 +248,7 @@ $('.button-group').each( function( i, buttonGroup ) {
                 })
 
             .fail(function( xhr, status, errorThrown ) {
+                // TODO: try the other explorer if we can't talk to the first one
                 //alert( "Ooops, error talking to explorer API!");
                 $('#seconds_until_halving').html("Ooops, error talking to explorer API !")
                 log( "Error: " + errorThrown );