script to grab a sorted list of the largest holders of rfDAI

getWhales.js

const ethers = require('ethers');

const STARTING_BLOCK = 41918655;
const FINAL_BLOCK = 44000000;

async function main() {
    const provider = new ethers.providers.JsonRpcProvider("https://rpc.ankr.com/fantom/");
    let balances = {};

    for (let i = STARTING_BLOCK; i < FINAL_BLOCK;) {
        console.log(`Block ${i}: (${Math.floor((i - STARTING_BLOCK) / (FINAL_BLOCK - STARTING_BLOCK) * 100)}%)`)

        filter = {
            address: "0x77dc33dC0278d21398cb9b16CbFf99c1B712a87A",
            topics: [ "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef" ],
            fromBlock: i,
            toBlock: i + 2500
        };

        
        try {
            const logs = await provider.getLogs(filter);

            for (log of logs) {
                let from = "0x" + log.topics[1].slice(-40);
                let to = "0x" + log.topics[2].slice(-40);
                let amt = parseFloat(ethers.utils.formatEther(ethers.BigNumber.from(log.data)));
    
                balances[from] = balances[from] ? balances[from] - amt : -amt;
                balances[to] = balances[to] ? balances[to] + amt : amt;
            }
          
            i += 2500;
        } catch (err) {
            console.log(err)
        }
    }

    console.log("-----------------------")
    
    sorted = Object.keys(balances).sort((a,b) =>  balances[a] - balances[b])
    for (addr of sorted) {
        console.log(`${ethers.utils.getAddress(addr)}: ${balances[addr]}`)
    }

}

main();