Use bitcore-node-dash as dependencies

index.js

const bitcore = require('bitcore-node-dash');
const start = bitcore.scaffold.start;
let config = {
  "network": "testnet",
  "port": 3001,
  "services": [
    "bitcoind"
  ],
  "servicesConfig": {
    "bitcoind": {
      "connect": [{
        "rpchost": "127.0.0.1",
        "rpcport": 9998,
        "rpcuser": "dash",
        "rpcpassword": "local321",
        "zmqpubrawtx": "tcp://127.0.0.1:28332"
      }]
    }
  }
};

let node = start({path:"",config:config});
node.on('ready',function(){
	console.log('Hey I\'m ready!')
	let dashd = node.services.bitcoind;	
	dashd.getBestBlockHash(function(err, hash){
		if(err){console.log(err);}
		dashd.getBlockHeader(hash,function(err, info){
			console.log(info);
		});
	});	
	dashd.on('block',function(block){console.log(block)});	
	dashd.on('tx',function(txData){
		let tx = new bitcore.lib.Transaction(txData).toJSON();
		let inputs = tx.inputs;

		inputs.forEach(function(input){
			 let script = new bitcore.lib.Script(input.script); 
			 let address = script.toAddress('testnet');
			//Enjoy potato with address
		})    
    });
});