How to Claim the Witness (Super Representative) Voting Rewards on Tron Blockchain using Node Js (Javascript)?

In Tron Blockchain, you can freeze your TRX assets as either energy or bandwidth, and then vote for your preferred witnesses (or called SR = Super Representative).

Each SR has a different ratio of voting distribution, and you can claim the rewards for your witness votes.

With the following Javascript code - you can run it at NodeJs e.g. node or nodejs.

It will first make a API call to trongrid to withdraw-balance, and it will return a JSON - which needs to be properly signed with your private key, and then final step is to broadcast the signed transaction.

const TrxAccount = "Tron Account";
const AppKey = 'Your APP Key at Tron Grid' 
const privateKey = 'Your Private Key (Active Key)';
const fetch = require('node-fetch');
const url = 'https://api.trongrid.io/wallet/withdrawbalance';

const TronWeb = require('tronweb');

const tronWeb = new TronWeb({
    fullHost: 'https://api.trongrid.io',
    headers: { "TRON-PRO-API-KEY": AppKey },
    privateKey: privateKey,
});

async function claimRewards() {
  const options = {
    method: 'POST',
    headers: {
        Accept: 'application/json', 
        'Content-Type': 'application/json',
        'TRON-PRO-API-KEY': AppKey,
    },
    body: JSON.stringify({owner_address: TrxAccount, visible: true})
  };
  const res = await fetch(url, options);
  if (res.ok) {  
    return await (res.json());
  }
}

(async function() {
    const tx = await claimRewards();    
    if (tx.Error) {
        console.log(tx.Error);
    } else {
        console.log(tx);
        const signedtxn = await tronWeb.trx.sign(tx, privateKey);        
        const receipt = await tronWeb.trx.sendRawTransaction(signedtxn);
        console.log(receipt);
    }
})();

Please note that you can only claim (withdraw) balance/rewards once every 24 hours. For example:

$ node claim-witness-voting-rewards.js 
{ visible: true,
  txID:
   'd0d64fbdc5bbXXXXXXXXXXXXXXXXXXXXXXXX2d6d8afa2d7c4e366ea',
  raw_data:
   { contract: [ [Object] ],
     ref_block_bytes: '37e4',
     ref_block_hash: '94da0dbee6007793',
     expiration: 1623503307000,
     timestamp: 1623503250641 },
  raw_data_hex:
   '0a0237e4220894daXXXXXXXXXXXXXXXXXXXXXXXXXXXXXa15416e7df7ae2caadc4d984697cf6dd3d483dc9fcce370d1c9d682a02f' }
{ result: true,
  txid:
   'd0d64fbdc5bbfd009674490e101a5XXXXXXXXXXXXXd7c4e366ea',
  transaction:
   { visible: true,
     txID:
      'd0d64fbdc5bbfXXXXXXXXXXXXXXXXXXXXXXXXX7c4e366ea',
     raw_data:
      { contract: [Array],
        ref_block_bytes: '37e4',
        ref_block_hash: '94da0dbee6007793',
        expiration: 1623503307000,
        timestamp: 1623503250641 },
     raw_data_hex:
      '0a0237e42208XXXXXXXXXXXXXXXXXXXXXXX416e7df7ae2caadc4d984697cf6dd3d483dc9fcce370d1c9d682a02f',
     signature:
      [ '19e22bbcf0caeXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX0755ba72c49cf1d8b594e01' ] } }

$ node claim-witness-voting-rewards.js 
{ Error:
   'class org.tron.core.exception.ContractValidateException : The last withdraw time is 1623503250000, less than 24 hours' }

Reposted to Blog

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