block.html

<!--
insight-ui-bitzeny/public/views/block.html


<tr>
  <td><strong>Merkle Root</strong></td>
  <td class="text-right text-muted">
    <div class="ellipsis">
      <span class="btn-copy" clip-copy="block.merkleroot"></span>
      <span>{{block.merkleroot}}</span>
    </div>
  </td>
</tr>

Please add the following code after this.
-->
<tr data-ng-show="block.segwitCommitment">
  <td><strong>Segwit Commitment</strong></td>
  <td class="text-right text-muted">
    <div class="ellipsis">
      <span class="btn-copy" clip-copy="block.segwitCommitment"></span>
      <span>{{block.segwitCommitment}}</span>
    </div>
  </td>
</tr>

blocks.js

// insight-api-bitzeny/app/controllers/blocks.js

// Please change line 19 - 23 to this
// https://github.com/BitzenyCoreDevelopers/insight-api-bitzeny/blob/master/app/controllers/blocks.js#L19-L23
tdb.getPoolInfo(block.info.tx[0], function(info) {
  block.info.poolInfo = info;
  tdb.getSegwitCommitment(block.info.tx[0], function(info) {
    block.info.segwitCommitment = info;
    req.block = block.info;
    return next();
  });
});

// Please change line 69 - 72 to this
// https://github.com/BitzenyCoreDevelopers/insight-api-bitzeny/blob/master/app/controllers/blocks.js#L69-L72
tdb.getPoolInfo(block.info.tx[0], function(info) {
  block.info.poolInfo = info;
  tdb.getSegwitCommitment(block.info.tx[0], function(info) {
    block.info.segwitCommitment = info;
    return cb(err, block.info);
  });
});

TransactionDb.js

// Please add to insight-api-bitzeny/lib/TransactionDb.js

TransactionDb.prototype.getSegwitCommitment = function(txid, cb) {
  Rpc.getTxInfo(txid, function(err, txInfo) {
    if (err) return cb(false);
    var ret;

    if (txInfo && txInfo.isCoinBase) {
      txInfo.vout.forEach( function(v) {
        if (v.scriptPubKey.type === "nulldata") {
          var data = v.scriptPubKey.hex.match(/.{1,2}/g).map(function(v){return parseInt(v, 16)});
          var i = data.indexOf(106);
          if(i !== -1){
            data = data.slice(i+1);
            if(data[0] === 36){
              var hex = Array.prototype.map.call(data.slice(1), function(x){return ('00' + x.toString(16)).slice(-2)}).join('');
              if(hex.indexOf("aa21a9ed") === 0){
                ret = hex.slice(8, 32*2+8)
              }
            }
          }
        }
      }); 
    }
    return cb(ret);
  });
};