get all holders of a token `fromBlock` to `toBlock`, see more details in readme.md

readme.md

0x00 Infura

create a infura project at https://infura.io/

0x01 install Web3js

use Web3js to create a Contract object

npm install web3

0x02 install csv-writer

npm install csv-writer

0x03 config file config.json

{
  "provider": "https://mainnet.infura.io/v3/your_token",
  "tokenAddress": "0x7A58c0Be72BE218B41C608b7Fe7C5bB630736C71",
  "fromBlock": "0",
  "toBlock": "latest",
  "abi": []
}

0x04 run

node ./holders.js

0x05 result in holders_0x...csv

holder,balance
0x534Db4d2f6715D9c7023Bd938b0f62D72eE871eF,8
0xDd386096048683378E87FA626C75C2b548fd5e7e,8
...
0x3317AD9eDa6942b5a7BE5BA83346C0Ea82C3C26C,2
0xA62F8ABb12094F5651C8bA7222A0dC1034Ca4B20,6

config.json

{
  "provider": "https://mainnet.infura.io/v3/your_token",
  "tokenAddress": "0x7A58c0Be72BE218B41C608b7Fe7C5bB630736C71",
  "fromBlock": "0",
  "toBlock": "latest",
  "abi": []
}

holders.js

const fs = require('fs');
const Web3 = require('web3');
const createCsvWriter = require('csv-writer').createObjectCsvWriter;

var config = require('./config.json');
const web3 = new Web3(config['provider']);

var tokenAddr = config['contractAddress'];
var subAddr = tokenAddr.substr(0,4) + '...' + tokenAddr.substr(40,2);
var fromBlock = config['fromBlock'];
var toBlock = config['toBlock'];
var tokenABI = config['abi'];

var token = new web3.eth.Contract(tokenABI, tokenAddr);
var addrs = [];

const csvWriter = createCsvWriter({
  path: 'holders_' + subAddr + '.csv',
  header: [
    {id: 'addr', title: 'holder'},
    {id: 'balance', title: 'balance'},
  ]
});

const SplitGetEvents = async (start, end) => {
    var evs = []
    try {
        evs = await token.getPastEvents('Transfer', {fromBlock:start, toBlock:end});
    } catch (err) {
        if (err.message === 'Returned error: query returned more than 10000 results') {
            const middle = Math.round((start + end) / 2);
            console.log('Infura 10000 limit [' + start + '..' + end + '] ' +
            '->  [' + start + '..' + middle + '] ' + 
            'and [' + (middle + 1) + '..' + end + ']');
            var levs = await SplitGetEvents(start, middle);
            var revs = await SplitGetEvents(middle + 1, end);
            return levs.concat(revs);
        }
    }
    return evs;
}

const TokenHolders = async () => {
    if (toBlock == 'latest') {
        let number = await web3.eth.getBlockNumber()
        toBlock = number;
        console.log(toBlock);
    }
    
    console.log('get all token holders of ' + subAddr + ' from block ' + fromBlock + ' to ' + toBlock);
    var evs = await SplitGetEvents(fromBlock, toBlock);
    evs.forEach(e => {
        addrs.push(e.returnValues.to);
    });
    addrs = Array.from(new Set(addrs));
    return addrs;
}

TokenHolders().then(res => {
    fs.writeFile('holders_' + subAddr + '.txt', res.join('\n'), err => {
        if (err) {
            console.error(err)
            return
        }
    })
    var records = [];
    var tasks = [];
    res.forEach(addr => {
        tasks.push(token.methods.balanceOf(addr).call().then(balance => {
            if (balance == 0) return;
            // console.log(addr, balance);
            records.push({'addr': addr, 'balance': balance});
        }));
    })
    Promise.all(tasks).then(() => {
        csvWriter.writeRecords(records).then(() => console.log('The CSV file was written successfully'));
    });
});