Parity Issue 9660

main.js

const ethers = require('ethers');
const readline = require('readline');

const account = ethers.Wallet.createRandom();
let nonce = 0;
let mined = 0;
console.log("Created account:", account.address);

async function sleep(ms) {
    return new Promise((resolve) => {
        setTimeout(resolve, ms);
    });
}

async function sendTransaction(provider, signedTx) {
    const txResult = await provider.sendTransaction(signedTx);
    // console.log("Sending transaction", txResult.hash);
    const txWaitResult = await txResult.wait();
    // console.log("Mined transaction", txWaitResult.transactionHash, "at block", txWaitResult.blockNumber);
    mined += 1;
    const str = mined.toString();
    process.stdout.write(str);
    readline.moveCursor(process.stdout, -1 * str.length, 0);
}

async function run() {
    const provider = new ethers.providers.JsonRpcProvider();
    // const bn = await provider.getBlockNumber();
    // console.log("Current block number:", bn);

    const n = Math.ceil(Math.random() * 500);
    // const n = 2;
    // const n = 500;
    const initNonce = nonce;

    const transactions = await Promise.all(
        Array.from(Array(n)).map(async (_, i) => {
            const tx = {
                nonce: initNonce + i,
                gasLimit: 210000,
                gasPrice: 0,
                to: "0x88a5C2d9919e46F883EB62F7b8Dd9d0CC45bc290",
                value: 0,
                data: "0xaa" + i,
            };
            const signedTx = await account.sign(tx);
            return signedTx;
        })
    );
    
    nonce += n;
    mined = 0;

    const started = Date.now();
    process.stdout.write(`Sending ${n} transactions... `);
    await Promise.all(transactions.map((tx) => sendTransaction(provider, tx)));
    const elapsed = Math.round(Date.now() - started) / 1000;
    const speed = Math.round(n / elapsed * 1000) / 1000;
    process.stdout.write(`Done ! ${elapsed}s - ${speed}tx/s\n`);
}
async function main() {

    while (true) {
        await run();
        await sleep(250);
    }
}

main()
    .then(() => process.exit(0))
    .catch((e) => {
        console.error(e);
        process.exit(1);
    });

package.json

{
  "name": "parity-issue-9660",
  "version": "0.1.0",
  "main": "index.js",
  "license": "MIT",
  "dependencies": {
    "ethers": "^4.0.33"
  }
}