Update 'supply/index.html'

supply/index.html

@@ -217,8 +217,14 @@ $('.button-group').each( function( i, buttonGroup ) {
 
                 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);
+                var block_reward      = 3.125;
+                // TODO: add future halvings
+                if ( json.height >= 2020000) {
+                    block_reward /= 2;
+                }
+                var monthly_inflation = parseFloat( 100 * (block_reward * blocks_per_day * 30  / json.total)).toPrecision(2);
+                var yearly_inflation  = parseFloat( 100 * (block_reward * blocks_per_day * 365 / json.total)).toPrecision(2);
+
 
                 $('#inflation').html( monthly_inflation + "% monthly, " + yearly_inflation + "% yearly" );