# 冷兔复盘

By [tp](https://paragraph.com/@tpwallet) · 2022-01-19

---

转自

[https://yixinrock.notion.site/XRC-Public-Sale-c1a4d178fabb43dcb0535448ae0134df](https://yixinrock.notion.site/XRC-Public-Sale-c1a4d178fabb43dcb0535448ae0134df)

复盘
--

*   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](https://etherscan.io/address/0x0bf8422f0a124e664f4ac2ec42cfe50afe8b8906)
        
*   请求数 14020984: 456; 14020985: 900; 14020986: 130; 14020987: 418
    

参考
--

*   [https://etherscan.io/block/14020997](https://etherscan.io/block/14020997)
    
*   [https://etherscan.io/address/0x6f8139116b64b7fa056F141d0a3F3002eeb359Bc](https://etherscan.io/address/0x6f8139116b64b7fa056F141d0a3F3002eeb359Bc)
    
*   [https://flashbots-explorer.marto.lol/?block=14020984](https://flashbots-explorer.marto.lol/?block=14020984)
    

总结
--

*   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）
    

步骤
--

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](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 ☕️
    

如何运行
----

    yarn add ethers underscore bnc-sdk ws
    
    // 提前三分钟运行
    node xrc.js
    

代码
--

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

// rinkeby // [https://rinkeby.etherscan.io/address/0xe4f85223c4c81856988508d210fc62480de5352b#code](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)

export const abi = \[{"inputs":\[{"internalType":"string","name":"initBaseURI","type":"string"},{"internalType":"address","name":"signer","type":"address"},{"internalType":"uint256","name":"\_maxBatchSize","type":"uint256"},{"internalType":"uint256","name":"\_collectionSize","type":"uint256"},{"internalType":"uint256","name":"\_reserveAmount","type":"uint256"}\],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":\[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}\],"name":"Approval","type":"event"},{"anonymous":false,"inputs":\[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}\],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":\[{"indexed":false,"internalType":"string","name":"newBaseURI","type":"string"}\],"name":"BaseURIChanged","type":"event"},{"anonymous":false,"inputs":\[{"indexed":false,"internalType":"address","name":"minter","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}\],"name":"Minted","type":"event"},{"anonymous":false,"inputs":\[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}\],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":\[{"indexed":false,"internalType":"address","name":"minter","type":"address"},{"indexed":false,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}\],"name":"ReservedToken","type":"event"},{"anonymous":false,"inputs":\[{"indexed":false,"internalType":"address","name":"signer","type":"address"}\],"name":"SignerChanged","type":"event"},{"anonymous":false,"inputs":\[{"indexed":false,"internalType":"enum XRC.Status","name":"status","type":"uint8"}\],"name":"StatusChanged","type":"event"},{"anonymous":false,"inputs":\[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}\],"name":"Transfer","type":"event"},{"inputs":\[\],"name":"PRICE","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}\],"name":"approve","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[{"internalType":"address","name":"owner","type":"address"}\],"name":"balanceOf","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"balanceWithdrawn","outputs":\[{"internalType":"bool","name":"","type":"bool"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"baseURI","outputs":\[{"internalType":"string","name":"","type":"string"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"uint256","name":"tokenId","type":"uint256"}\],"name":"getApproved","outputs":\[{"internalType":"address","name":"","type":"address"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"uint256","name":"tokenId","type":"uint256"}\],"name":"getOwnershipData","outputs":\[{"components":\[{"internalType":"address","name":"addr","type":"address"},{"internalType":"uint64","name":"startTimestamp","type":"uint64"}\],"internalType":"struct ERC721A.TokenOwnership","name":"","type":"tuple"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}\],"name":"isApprovedForAll","outputs":\[{"internalType":"bool","name":"","type":"bool"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"maxMint","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"maxSupply","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"mint","outputs":\[\],"stateMutability":"payable","type":"function"},{"inputs":\[\],"name":"name","outputs":\[{"internalType":"string","name":"","type":"string"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"nextOwnerToExplicitlySet","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"address","name":"owner","type":"address"}\],"name":"numberMinted","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"owner","outputs":\[{"internalType":"address","name":"","type":"address"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"uint256","name":"tokenId","type":"uint256"}\],"name":"ownerOf","outputs":\[{"internalType":"address","name":"","type":"address"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"string","name":"salt","type":"string"},{"internalType":"bytes","name":"token","type":"bytes"}\],"name":"presaleMint","outputs":\[\],"stateMutability":"payable","type":"function"},{"inputs":\[{"internalType":"address","name":"","type":"address"}\],"name":"publicMinted","outputs":\[{"internalType":"bool","name":"","type":"bool"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"renounceOwnership","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}\],"name":"reserve","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[\],"name":"reserveAmount","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}\],"name":"safeTransferFrom","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"\_data","type":"bytes"}\],"name":"safeTransferFrom","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}\],"name":"setApprovalForAll","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[{"internalType":"string","name":"newBaseURI","type":"string"}\],"name":"setBaseURI","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[{"internalType":"uint256","name":"quantity","type":"uint256"}\],"name":"setOwnersExplicit","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[{"internalType":"address","name":"signer","type":"address"}\],"name":"setSigner","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[{"internalType":"enum XRC.Status","name":"\_status","type":"uint8"}\],"name":"setStatus","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[\],"name":"status","outputs":\[{"internalType":"enum XRC.Status","name":"","type":"uint8"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}\],"name":"supportsInterface","outputs":\[{"internalType":"bool","name":"","type":"bool"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"symbol","outputs":\[{"internalType":"string","name":"","type":"string"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"uint256","name":"index","type":"uint256"}\],"name":"tokenByIndex","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}\],"name":"tokenOfOwnerByIndex","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"uint256","name":"tokenId","type":"uint256"}\],"name":"tokenURI","outputs":\[{"internalType":"string","name":"","type":"string"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"tokensReserved","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[\],"name":"totalSupply","outputs":\[{"internalType":"uint256","name":"","type":"uint256"}\],"stateMutability":"view","type":"function"},{"inputs":\[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}\],"name":"transferFrom","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[{"internalType":"address","name":"newOwner","type":"address"}\],"name":"transferOwnership","outputs":\[\],"stateMutability":"nonpayable","type":"function"},{"inputs":\[\],"name":"withdraw","outputs":\[\],"stateMutability":"nonpayable","type":"function"}\]
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*Originally published on [tp](https://paragraph.com/@tpwallet/Goese3S0oTy50I49RHLw)*