Mysterion

<?php

$json = '{
   "error":"ok",
   "result":{
      "amount":"1.00000000",
      "address":"YYY",
      "txn_id":"XXX",
      "confirms_needed":"10",
      "timeout":9000,
      "status_url":"https:\/\/www.site.net\/index.php?cmd=status&id=XXX&key=ZZZ",
      "qrcode_url":"https:\/\/www.site.net\/qrgen.php?id=XXX&key=ZZZ"
   }
}';

$output_std = json_decode($json);
echo $output_std->result->address;
$output_assoc = json_decode($json,true);
echo $output_assoc['result']['address'];

location ^~ /textgrav { 
    //proxy_pass http://127.0.0.1:1234;
    //root /var/www/grav;
  }