class1-1

Class 1/dm/calss1.js

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+var Web3 = require('web3');
+
+var rpcstring = 'https://bsc-dataseed1.binance.org/';
+var wstring = 'wss://bsc-ws-node.nariox.org:443';
+
+var wscweb3 = new Web3(new Web3.providers.WebsocketProvider(wstring));
+
+var rpcweb3 = new Web3(new Web3.providers.HttpProvider(rpcstring));
+
+//用私钥将交易内容签名
+var EthereumTx = require('ethereumjs-tx');
+const util = require('ethereumjs-util');
+
+var privKeystring = "c98ec428bd837599deeabc008554d6ee87b839710c97fc172f8e847782712c53";
+var wbnbaddress = "0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c";
+
+var walletaddress = "0x470906BD12811F128B4CC3FB93883BBF95bf5058";
+var addresspancake = "0x10ed43c718714eb63d5aa57b78b54704e256024e";
+var tokenaddress = "0x4fabb145d64652a948d72533023f6e7a623c7c53";
+web3 = rpcweb3;
+
+//通过小数点多少位，转换对应的数据
+function getweiname(tokendecimals = 18) {
+  weiname = 'ether';
+  switch (tokendecimals) {
+    case 3:
+      weiname = "Kwei";
+      break;
+    case 6:
+      weiname = 'mwei';
+      break;
+    case 9:
+      weiname = 'gwei';
+      break;
+    case 12:
+      weiname = 'microether ';
+      break;
+    case 15:
+      weiname = 'milliether';
+      break;
+    case 18:
+      weiname = 'ether';
+      break;
+
+  }
+  return weiname;
+}
+
+const getBNBBalance = async (address) => {
+  let result = await web3.eth.getBalance(address)
+  let balance = web3.utils.fromWei(result.toString(10), getweiname());
+  console.log("地址：" + address + "有" + balance + "个BNB");
+  return balance;
+}
+
+const erc20 = require('./erc20.js')
+
+//作业1
+let addressArray = [
+  "0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c", "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
+  "0xae7ab96520de3a18e5e111b5eaab095312d7fe84", "0x0e09fabb73bd3ade0a17ecc321fd13a19e81ce82",
+  "0x8850d2c68c632e3b258e612abaa8fada7e6958e5", "0xde3dbbe30cfa9f437b293294d1fd64b26045c71a",
+  "0x8e3bcc334657560253b83f08331d85267316e08a", "0x8f0528ce5ef7b51152a59745befdd91d97091d2f",
+  "0x75231f58b43240c9718dd58b4967c5114342a86c", "0xa0b73e1ff0b80914ab6fe0444e65848c4c34450b"
+]
+
+function getArrrayTokenInformation(addressArray, address) {
+  addressArray.forEach(element => {
+    getTokenBalance(element, address)
+  });
+}
+
+const getTokenBalance = async (tokenaddress, address) => {
+  //创建代币的智能合约函数
+  var tokenContract = new web3.eth.Contract(erc20, tokenaddress);
+
+  //调用代币的智能合约获取余额功能
+  let result = await tokenContract.methods.balanceOf(address).call();
+  //获得代币有多少位小数
+  let decimals = await tokenContract.methods.decimals().call();
+  weiname = getweiname(decimals);
+  let tokenbalance = web3.utils.fromWei(result.toString(10), weiname);
+  //获得代币符号
+  let symbol = await tokenContract.methods.symbol().call();
+  //打印结果
+  console.log("地址：" + address + "有" + symbol + "的数量是：" + tokenbalance);
+  return tokenbalance;
+}
+
+
+
+function getprivKey(privKeystring) {
+  const privKey = new Buffer.from(privKeystring, "hex");
+  return privKey;
+}
+
+var privKey = getprivKey(privKeystring);
+
+//这里是将交易用私钥签名部分
+function getEthRawTx(fromAddress, toAddress, input, nonceNum, privKey, gasPrice, nbnb, gaslimit) {
+  var rawTransaction = {
+    "from": fromAddress,
+    "nonce": web3.utils.toHex(nonceNum),
+    "gaslimit": web3.utils.toHex(gaslimit),
+    "gasPrice": web3.utils.toHex(gasPrice),
+    "to": toAddress,
+    "value": web3.utils.toHex(nbnb),
+    "data": input,
+    "chainId": 0x38
+  }
+
+  var tx = new EthereumTx(rawTransaction);
+  tx.sign(privKey);
+  var serializedTx = tx.serialize();
+  return serializedTx;
+}
+
+
+//这里是将签名的内容发送到区块链网络中的代码
+const signTransaction = async (fromAddress, toAddress, input, nonceNum, privKey, gasPrice, nbnb, gaslimit) => {
+  var serializedTx = getEthRawTx(fromAddress, toAddress, input, nonceNum, privKey, gasPrice, nbnb, gaslimit)
+  // Comment out these three lines if you don't really want to send the TX right now
+  console.log(`Attempting to send signed tx:  ${serializedTx.toString('hex')}`);
+  var receipt = await web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'));
+  console.log(`Receipt info:  ${JSON.stringify(receipt, null, '\t')}`);
+  if (receipt.status == true) {
+    return true;
+  }
+  return false;
+}
+
+const send = async () => {
+  //获得自己的地址
+  var fromAddress = "0x" + util.privateToAddress(privKey).toString('hex');
+
+  //发送给谁
+  var toAddress = walletaddress
+
+  var nsendBNB = 0.002
+  //假设交易 0.008个bnb
+  var nbnb = web3.utils.toWei((nsendBNB).toString(10), 'ether');
+  //设置gasprice 为 5G wei
+  var gasPrice = web3.utils.toWei((5).toString(10), 'Gwei');
+  //设置 gaslimit 为 420000
+  var gaslimit = 420000
+  //没有调用智能合约，将input设置为空
+  var input = ""
+  //获得下一次交易的数
+  var nonceCnt = await web3.eth.getTransactionCount(fromAddress);
+  console.log("gasPrice" + gasPrice)
+  let reslut = await signTransaction(fromAddress, toAddress, input, nonceCnt, privKey, gasPrice, nbnb, gaslimit)
+  if (reslut) {
+    console.log("交易成功")
+  } else {
+    console.log("交易失败")
+  }
+
+}
+
+const transfor = async (tokenaddress, walletaddress, tokenNum) => {
+  var fromAddress = "0x" + util.privateToAddress(privKey).toString('hex');
+  var toAddress = walletaddress;
+  //设置gasprice 为 10G wei
+  var gasPrice = web3.utils.toWei((10).toString(10), 'Gwei');
+  //设置 gaslimit 为 420000
+  var gaslimit = 420000
+  var nonceCnt = await web3.eth.getTransactionCount(fromAddress);
+  var tokenContract = new web3.eth.Contract(erc20, tokenaddress);
+  var input = tokenContract.methods.transfer(toAddress, web3.utils.toWei((tokenNum).toString(10), 'ether')).encodeABI();
+  let reslut = await signTransaction(fromAddress, tokenaddress, input, nonceCnt, privKey, gasPrice, 0, gaslimit)
+  if (reslut) {
+    console.log("交易成功")
+  } else {
+    console.log("交易失败")
+  }
+}
+
+const pancake = require('./pancake.js')
+
+
+var moment = require('moment');
+
+//获取input内容
+function swaptokeninput(wbnbadddress, toaddress, tokenamountIn, amountOut, tokenaddress, tokendecimals = 18, ) {
+
+  weiname = getweiname(tokendecimals);
+
+  var path = [wbnbadddress, tokenaddress];
+
+  var amountOutMin = web3.utils.toWei(amountOut.toString(10), weiname);
+  const now = moment().unix();
+  const DEADLINE = now + 60 * 20; //往后延迟20分钟
+
+  var deadline = (DEADLINE).toString(10);
+  console.log("inputbefore");
+  console.log(pancake[0]);
+  var input = web3.eth.abi.encodeFunctionCall(pancake[0], [amountOutMin, path, toaddress, deadline]);
+  console.log(input)
+  return input;
+}
+var moment = require('moment');
+const swap = async () => {
+
+  //获得自己的地址
+  var fromAddress = "0x" + util.privateToAddress(privKey).toString('hex');
+  //要交换的tokenadrress
+
+  var tokenContract = new web3.eth.Contract(erc20, tokenaddress);
+
+  //获得代币有多少位小数
+  let decimals = await tokenContract.methods.decimals().call();
+
+  // 设置交易滑点,直接调用合约可以设置100的滑点，这里设置50的滑点
+  var los = 99;
+  // 假设要购买0.005个BNB的tokenA
+  var nbnb = 0.01;
+  //假设bnb 和 token的兑换比例是 1:1000
+  var rate = 57;
+  var ntoken = nbnb * (100 - los) / 100 * rate;
+
+  //获得input 内容
+  //创建交易执行智能合约
+  var toAddress = addresspancake
+  //获得下一次交易的数
+  var nonceCnt = await web3.eth.getTransactionCount(fromAddress);
+
+  //交易需要5个BNB
+  nbnb = web3.utils.toWei((nbnb).toString(10), 'ether');
+  //设置gasprice 为 5G wei
+  var gasPrice = web3.utils.toWei((5).toString(10), 'Gwei');
+  //设置 gaslimit 为 420000
+  var gaslimit = 420000
+
+  var input = swaptokeninput(wbnbaddress, fromAddress, nbnb, ntoken, tokenaddress, decimals)
+  let reslut = await signTransaction(fromAddress, toAddress, input, nonceCnt, privKey, gasPrice, nbnb, gaslimit)
+  if (reslut) {
+    console.log("交易成功")
+  } else {
+    console.log("交易失败")
+  }
+
+}
+
+const main = async () => {
+  // getBNBBalance(walletaddress);
+  // getTokenBalance(wbnbaddress, walletaddress);
+  // send();
+  // swap()
+
+  //作业1
+  // getArrrayTokenInformation(addressArray, walletaddress)
+  //作业2
+  // transfor(wbnbaddress, walletaddress, 0.0002)
+}
+
+main();