JS: Claim Rewards

Full, runnable src of Claim Rewards can be downloaded as part of: tutorials/javascript (or download just this tutorial: devportal-master-tutorials-javascript-23_claim_rewards.zip).

This tutorial runs on the main Hive blockchain. And accounts queried are real users with unclaimed balances.

Intro

This tutorial will show few functions such as querying account by name and getting unclaimed rewards. We are using the call function provided by the dhive library to pull accounts from the Hive blockchain. A simple HTML interface is used to capture the account and its unclaimed balance as well as allowing interactively claim rewards.

Also see:

• claim_reward_balance_operation

Steps

1. App setup Setup dhive to use the proper connection and network.
2. Search account Get account details after input has account name
3. Fill form Fill form with account reward balances
4. Claim reward Claim reward with Hive Signer or Client signing options

1. App setup

Below we have dhive pointing to the production network with the proper chainId, addressPrefix, and endpoint. There is a public/app.js file which holds the Javascript segment of this tutorial. In the first few lines we define the configured library and packages:

const dhive = require('@hiveio/dhive');
let opts = {};
//connect to production server
opts.addressPrefix = 'STM';
opts.chainId =
    'beeab0de00000000000000000000000000000000000000000000000000000000';
//connect to server which is connected to the network/production
const client = new dhive.Client('https://api.hive.blog');

2. Search account

After account name field is filled with some name, we do automatic search for account by name when input is focused out. HTML input forms can be found in the index.html file. The values are pulled from that screen with the below:

    const accSearch = document.getElementById('username').value;
    const _accounts = await client.database.call('get_accounts', [[accSearch]]);
    console.log(`_accounts:`, _accounts);

3. Fill form

After we fetched account data, we will fill form with reward balance and show current reward balance details.

const name = _accounts[0].name;
const reward_hive = _accounts[0].reward_hive_balance.split(' ')[0];
const reward_hbd = _accounts[0].reward_hbd_balance.split(' ')[0];
const reward_sp = _accounts[0].reward_vesting_hive.split(' ')[0];
const reward_vests = _accounts[0].reward_vesting_balance.split(' ')[0];
const unclaimed_balance = `Unclaimed balance for ${name}: ${reward_hive} HIVE, ${reward_hbd} HBD, ${reward_sp} HP = ${reward_vests} VESTS<br/>`;
document.getElementById('accList').innerHTML = unclaimed_balance;
document.getElementById('hive').value = reward_hive;
document.getElementById('hbd').value = reward_hbd;
document.getElementById('hp').value = reward_vests;

4. Claim reward

We have 2 options on how to claim rewards. Hive Signer and Client signing options. We generate Hive Signer link to claim rewards, but you can also choose client signing option to claim rewards right inside tutorial.

In order to enable client signing, we will generate operation and also show Posting Private key (wif) field to sign transaction right there client side. Below you can see example of operation and signing transaction, after successful operation broadcast result will be shown in user interface. It will be block number that transaction was included.

window.submitTx = async () => {
    const privateKey = dhive.PrivateKey.fromString(
        document.getElementById('wif').value
    );
    const op = [
        'claim_reward_balance',
        {
            account: document.getElementById('username').value,
            reward_hive: document.getElementById('hive').value + ' HIVE',
            reward_hbd: document.getElementById('hbd').value + ' HBD',
            reward_vests: document.getElementById('hp').value + ' VESTS',
        },
    ];
    client.broadcast.sendOperations([op], privateKey).then(
        function(result) {
            document.getElementById('result').style.display = 'block';
            document.getElementById(
                'result'
            ).innerHTML = `<br/><p>Included in block: ${
                result.block_num
            }</p><br/><br/>`;
        },
        function(error) {
            console.error(error);
        }
    );
};

That’s it!

To run this tutorial

1. git clone https://gitlab.syncad.com/hive/devportal.git
2. cd devportal/tutorials/javascript/23_claim_rewards
3. npm i
4. npm run dev-server or npm run start
5. After a few moments, the server should be running at http://localhost:3000/