Using bytes32 with caver-js

caver-js_bytes32.js

const Caver = require('caver-js');
const caver = new Caver('https://api.baobab.klaytn.net:8651');

const acct = caver.klay.accounts.privateKeyToAccount('your_private_key')
caver.klay.accounts.wallet.add(acct)

/*
  We will use the following contract to demonstrate the use of bytes32:
  
  pragma solidity 0.4.24;

  contract StringStorage {
    bytes32 storedData;

    function set(bytes32 x) public {
        storedData = x;
    }

    function get() public view returns (bytes32) {
        return storedData;
    }
  }
*/

// Use the following ABI for the above contract
const ABI = [
	{
		"constant": false,
		"inputs": [
			{
				"name": "x",
				"type": "bytes32"
			}
		],
		"name": "set",
		"outputs": [],
		"payable": false,
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"constant": true,
		"inputs": [],
		"name": "get",
		"outputs": [
			{
				"name": "",
				"type": "bytes32"
			}
		],
		"payable": false,
		"stateMutability": "view",
		"type": "function"
	}
];

// assume there is a StringStorage contract deployed at 0x9252098B64E6904Fe9Cf4C8F5785e567869F4a21
async function test() {
    const contract = new caver.klay.Contract(ABI, '0x9252098B64E6904Fe9Cf4C8F5785e567869F4a21');
    
    const hexText = caver.utils.asciiToHex('test');     // Note that `fromAscii` is deprecated
    const padded = caver.utils.padRight(hexText, 64);   // Right padding
    
    const txSet = contract.methods.set(padded);
    
    txSet.send({
        from: acct.address,
        gas: 3000000
    })
    .on('transactionHash', function(hash) {
        console.log(">>> tx_hash: ", hash);
    })
    .on('receipt', function(receipt) {
        console.log(">>> receipt: ", receipt);
    })
    .on('error', function (err) {
        console.log(err);
    })
}

test();

Thanks.