Periodic Airdrops on Solana

Question

What is best practice for running Airdrops periodically? For example Airdrop daily rewards to holders of a certain token? Is something like this even possible to do while just using an on-chain program?

Answer 1

If you're using Node.js, then you can use libraries such as node-schedule to schedule a job which would run periodically at a certain interval.

const schedule = require('node-schedule');

// 0 * * * * means every 1 hour - https://cronexpressiontogo.com/every-1-hour
const job = schedule.scheduleJob('0 * * * *', function(){
  // add the function which would airdrop tokens over here
});

Answer 2

you can write a script to do that depending on the language you are using, if you are using javascript then you can use web3.js on solana to get started

just use the devnet and program a timer thread to airdrop you at intervals..

from 0xmukesh answer:

const schedule = require('node-schedule');

// 0 * * * * means every 1 hour - https://cronexpressiontogo.com/every-1-hour
const job = schedule.scheduleJob('0 * * * *', function(){
  // Establish new connect to devnet - websocket client connected to devnet will also be registered here
const connection = new Connection(clusterApiUrl("devnet"), "confirmed");

// Create a test wallet to listen to
const wallet = Keypair.generate();

// Register a callback to listen to the wallet (ws subscription)
connection.onAccountChange(
  wallet.publicKey(),
  (updatedAccountInfo, context) =>
    console.log("Updated account info: ", updatedAccountInfo),
  "confirmed"
);
});