Not able to retrieve Solidity event in JavaScript

Question

I have my sample contract as:-

 pragma solidity ^0.4.24;

contract Storage {
  uint256 storedData;

  event print(uint256 store);

  function set(uint256 data) public {
    emit print(data);
    storedData = data;
  }

  function get() constant returns (uint256) {
    return storedData;   
  }
}

After setting the value from geth console and mining it, when I use get function to check the value it returns the correct value which was set earlier. However when I try to get the event logs with the following code:-

var eve = instance.print({sender:eth.coinbase},{fromBlock: 0, toBlock: "latest"});
var allValues = eve.get();allValues[allValues.length - 1].args;
console.log(allValues[allValues.length - 1].args.store);

Here instance is the contract instance, It shows the error as cannot access member args of undefined.

Answer 1

Your code looks fine for me. I tried to match your code as closely as possible using Node.js and ganache. Here's my full (working) test code:

const Web3 = require('web3');
const fs = require('fs');
const solc = require('solc');
const ganache = require('ganache-cli');

const web3 = new Web3(ganache.provider());

const compiled = solc.compile(`
pragma solidity ^0.4.24;

contract Storage {
  uint256 storedData;

  event print(uint256 store);

  function set(uint256 data) public {
    emit print(data);
    storedData = data;
  }

  function get() constant returns (uint256) {
    return storedData;
  }
}
`, 0).contracts[':Storage'];

web3.eth.getAccounts((err, accounts) => {
  web3.eth.defaultAccount = accounts[0];

  const contract = web3.eth.contract(JSON.parse(compiled.interface));
  contract.new({ data: compiled.bytecode, gas: 3000000 }, (err, instance) => {
    if (instance.address) {
      instance.set(42, (err, txHash) => {
        instance.print().get((err, logs) => {
          console.log(logs[0].args.store.toString()); // OUTPUT: 42
        });
      });
    }
  });
});