【科学家养成日记#6】自动参与Pancake IFO
还有8,9个小时,Pancake就开始新一期的IFO。IFO的流程基本和Biswap 的IDO差不多,但是这次Pancake的IFO稍微改了一下规则。
这次要参与IFO,需要在IFO前质押CAKE,然后按每天质押的平均数量来决定可以用多少cake参加。类似币安的IEO
所以如果你在IFO前质押了CAKE,那恭喜你可以参加这次的IFO了。能有多少的额度,查看pancake的IFO页面: https://pancakeswap.finance/ifo
比如我平均质押了26.873个CAKE,所以基本池我可以参与9.039 CAKE,无限池可以参与26.873 CAKE
有额度参加IFO后,只需修改一下之前写过的自动参与Biswap IDO的脚本里面的IFO合约地址和代币地址就能自动参与了
//加载web3的库 const Web3 = require('web3'); require("dotenv").config(); //读取ERC20的ABI文件 const ifoAbi = require('./ABI/ifo.json'); const erc20Abi = require('./ABI/erc20.json'); //设置BSC的RPC链接 const rpcUrl = 'https://bsc-dataseed1.binance.org/'; const rpcWeb3 = new Web3(new Web3.providers.HttpProvider(rpcUrl)); let web3 = rpcWeb3; const contractAddress = "0x63914805A0864e9557eA3A5cC86cc1BA054ec64b" const tokenAddress = "0x0e09fabb73bd3ade0a17ecc321fd13a19e81ce82"; /** * 查看是否有授权 * @param {*} tokenAddress 代币的合约 * @param {*} myAddress 钱包地址 * @param {*} spender 给予授权的地址 * @returns 是否授权 */ const hasApproved = async (tokenAddress, myAddress, spender) => { const tokenContract = new web3.eth.Contract(erc20Abi, tokenAddress); return (await tokenContract.methods.allowance(myAddress, spender).call()) > 0 ? true : false; } /** * 授权 * @param {*} tokenAddress 代币的合约 * @param {*} myAddress 钱包地址 * @param {*} spender 给予授权的地址 * @returns 授权结果 */ const approve = (tokenAddress, myAddress, spender, depositAmount) => { return new Promise(async (resolve, reject) => { const tokenContract = new web3.eth.Contract(erc20Abi, tokenAddress); let maxAmount = web3.utils.toWei(depositAmount.toString(), 'ether'); let nounce = await web3.eth.getTransactionCount(myAddress); let data = await tokenContract.methods.approve(spender, maxAmount).encodeABI(); let gasPrice = await web3.eth.getGasPrice(); const gasLimit = 420000; let tx = { nounce, gasPrice, gasLimit, to: tokenAddress, value: web3.utils.toWei((0).toString(), 'Gwei'), data }; web3.eth.accounts.signTransaction(tx, process.env.PRIVATE_KEY).then(signed => { web3.eth.sendSignedTransaction(signed.rawTransaction).on('receipt', receipt => { if (receipt.status) { console.log("Contract Approved"); resolve(true); } else { console.log("Contract not approved"); reject(false); } }) }); }); } const depositToPool = async (myAddress, pid, depositAmount) => { const contract = new web3.eth.Contract(ifoAbi, contractAddress); let nounce = await web3.eth.getTransactionCount(myAddress); // ifo info const amount = new web3.utils.toBN(depositAmount * (10 ** 18)); let gasPrice = await web3.eth.getGasPrice(); const gasLimit = 420000; const data = contract.methods.depositPool(amount, pid).encodeABI(); let tx = { nounce, gasPrice, gasLimit, to: contractAddress, value: web3.utils.toWei((0).toString(), 'Gwei'), data: data }; web3.eth.accounts.signTransaction(tx, process.env.PRIVATE_KEY).then(signed => { web3.eth.sendSignedTransaction(signed.rawTransaction).on('receipt', receipt => { if (receipt.status) { console.log("成功存入"); } else { console.log(receipt); } }) }); }; const harvestPool = async (myAddress, pid) => { const contract = new web3.eth.Contract(ifoAbi, contractAddress); let nounce = await web3.eth.getTransactionCount(myAddress); let gasPrice = await web3.eth.getGasPrice(); const gasLimit = 420000; const data = contract.methods.harvestPool(pid).encodeABI(); let tx = { nounce, gasPrice, gasLimit, to: contractAddress, value: web3.utils.toWei((0).toString(), 'Gwei'), data: data }; web3.eth.accounts.signTransaction(tx, process.env.PRIVATE_KEY).then(signed => { web3.eth.sendSignedTransaction(signed.rawTransaction).on('receipt', receipt => { if (receipt.status) { console.log("收菜成功"); } else { console.log(receipt); } }) }); }; async function getEndBlock() { const contract = new web3.eth.Contract(ifoAbi, contractAddress); let endBlock = await contract.methods.endBlock().call(); return endBlock; } async function getStartBlock() { const contract = new web3.eth.Contract(ifoAbi, contractAddress); let endBlock = await contract.methods.startBlock().call(); return endBlock; } const sleep = (milliseconds) => { return new Promise(resolve => setTimeout(resolve, milliseconds)) } async function main() { let account = web3.eth.accounts.privateKeyToAccount(process.env.PRIVATE_KEY); const depositAmount = 9.039; //存入池子的币的数量 基础池子最多$100 无限池子任意 const pid = 0;//0: 基础池子 1: 无限池子 let currentBlock = await web3.eth.getBlockNumber(); let startBlock = await getStartBlock(); let endBlock = await getEndBlock(); console.log(`IFO在第${startBlock}区块开始`) while (currentBlock < startBlock) { let diff = startBlock - currentBlock; console.log(`还差${diff}块IFO才开始`); currentBlock = await web3.eth.getBlockNumber(); await sleep(5000); } let isApprove = await hasApproved(tokenAddress, account.address, contractAddress); if (!isApprove) { await approve(tokenAddress, account.address, contractAddress, depositAmount); } // 存入币参与IFO console.log("正在存入币..."); depositToPool(account.address, pid, depositAmount); while (currentBlock < endBlock) { let diff = endBlock - currentBlock; console.log(`还差${diff}块才能领取IFO币`); currentBlock = await web3.eth.getBlockNumber(); await sleep(5000); } console.log("正在领取IFO币") //收菜 harvestPool(account.address, pid); } main();
脚本会查看IFO开始时间,到时间后会自动授权并存CAKE到池子。可以领取IFO币的时候会自动领取
github: https://github.com/ericet/kexuejia/blob/master/pancakeIfo.js