转自

https://yixinrock.notion.site/XRC-Public-Sale-c1a4d178fabb43dcb0535448ae0134df

• 管理员在 14020984 14020997 区块操作两次 setStatus

• 管理员在 14020984 区块设置开始抢购、14020997 设置抢购结束

• 管理员的 setStatus 请求，被科学家打包进 bundle 执行

• 十个请求在 14020987 14020986 中成功执行

• 管理员请求在区块 index 位置，区块 456 笔请求，必须在同一个区块中才能抢到

• 以下账号抢到很多

  • https://etherscan.io/address/0x0bf8422f0a124e664f4ac2ec42cfe50afe8b8906

• 请求数 14020984: 456; 14020985: 900; 14020986: 130; 14020987: 418

• https://etherscan.io/block/14020997

• https://etherscan.io/address/0x6f8139116b64b7fa056F141d0a3F3002eeb359Bc

• https://flashbots-explorer.marto.lol/?block=14020984

• 区块排名前 12 的，科学家从 mempool 池将 setStatus 请求和自己的请求打包成 bundle 给 flashbot

• 后面的这位科学家，使用的可能是鸟枪法（开始之后、不断的发请求，如果抢购结束就取消）

1. 批量给自己的地址转 ETH，如果不调整代码中的 gas price & gas limit，给个地址 0.2E 就够了

2. 自己去 blocknative 注册一个账号，免费账号延迟比较高（2S）

   1. https://docs.blocknative.com/webhook-api/rate-limits

3. 步骤 1 中的私钥填入 xrc.js 70 行，格式 [’1’, ‘2’, ‘3’]

4. 步骤 2 中的私钥填入 xrc.js 43 行，务必替换掉，我用的免费账号，限额很小，别卷我！

5. process.env.PROVIDER_WSS_URL 也替换成自己的 rpc

6. 运行代码 ☕️

yarn add ethers underscore bnc-sdk ws

// 提前三分钟运行
node xrc.js

// mainnet // https://etherscan.io/address/0x534d37c630b7e4d2a6c1e064f3a2632739e9ee04 // ownership // https://etherscan.io/address/0x6f8139116b64b7fa056F141d0a3F3002eeb359Bc - mempool 监听这个地址

// rinkeby // https://rinkeby.etherscan.io/address/0xe4f85223c4c81856988508d210fc62480de5352b#code

/**

• 监听合约的 setStatus 操作，批量下单 */

/* TODO:

• 10 个地址每个转 0.2

• source ~/.env_main

• 结束后统计成功率

• 删除私钥 */

import { ethers } from 'ethers' import _ from 'underscore' import BlocknativeSdk from 'bnc-sdk'; import WebSocket from 'ws'; import { abi } from './abi.js';

if (process.env.PROVIDER_WSS_URL === undefined) { console.error("Please provide PROVIDER_WSS_URL env") process.exit(1) }

const contractAddress = '0x534d37c630b7e4d2a6c1e064f3a2632739e9ee04' const xrc_abi = [ 'function mint() payable', 'function balanceOf(address owner) view returns (uint256)' ]

// rinkeby // replace networkId to 1 // replace admin_address to 0x6f8139116b64b7fa056F141d0a3F3002eeb359Bc const ADMIN_ADDRESS = "0x6f8139116b64b7fa056F141d0a3F3002eeb359Bc" const options = { dappId: 'fe96be23-dee0-4b98-b2a0-b6450886588b', networkId: 1, system: 'ethereum', ws: WebSocket, transactionHandlers: [async (event) => await go(event.transaction)], onerror: (error) => {console.error('error!!! ', error)} }

// replace mint to setStatus const main = async () => { const sdk = new BlocknativeSdk(options) console.log('listening until error msg is seen...') await sdk.configuration({ scope: contractAddress, abi: abi, filters: [ { from: ADMIN_ADDRESS }, { "contractCall.methodName": "setStatus" }, { status: "confirmed" } // { status: "pending" } ], watchAddress: true }) }

const go = async (txData) => { const arr = [

]

await Promise.all(arr.map(async v => await mintByPvKey(v))) }

const mintByPvKey = async (privateKey) => { const provider = new ethers.providers.WebSocketProvider(process.env.PROVIDER_WSS_URL) const wallet = new ethers.Wallet(privateKey, provider) const account = wallet.connect(provider) const address = wallet.address

console.log(now processssssing account ${address}...)

const spacex = new ethers.Contract( contractAddress, xrc_abi, account )

const balance = async (address) => { const out = await spacex.balanceOf(address) console.log(debug: address ${address} has ${out} cnt of xrc) return out }

const mint = async () => { const gasPrice = ethers.utils.parseUnits("900", "gwei") const address = wallet.address const gasLimit = 150000 const value = ethers.utils.parseEther("0.0502") const cost = ethers.utils.formatEther(gasPrice.mul(gasLimit).add(value))

console.log(`!!!!!!! address: ${address} will spent ${cost} ETH, and gasPrice is: ${gasPrice}`)

try {
  const ba = await balance(address)
  if (ba > 0) {
    console.log(`address ${address} already got one!!!`) 
    return
  }

  const tx = await spacex.mint({
    gasPrice,
    gasLimit,
    value,
  })

  const res = await tx.wait()
  if (res.status) {
    console.log(`Transaction receipt : https://www.etherscan.io/tx/${res.logs[1].transactionHash}\n`);
  }

} catch (e) {
  console.log(e.message)
}
return

}

await mint() }

await main() // process.exit(0)