【科学家养成日记#4】参与Biswap IFO
IPFS
今天参与了Biswap的第一次IFO,虽然收益一般,但是倒是折腾明白了流程,写了脚本,方便下回再次参加Biswap的IFO或者Pancake的IFO
说一下脚本的流程:
- 查看IFO开始的区块,如果目前区块大于等于开始区块,准备存入币参与IFO
- 在存入币前,先查看是否有授权,如果没有,授权给合约
- 授权后,就可以把币存入池子(有2个池子,1个基础池子,上限$100,一个无限池子)
- 存入币后,查看目前的区块是否大于结束的区块
- 如果大于结束的区块,开始领取IFO币和未使用的币
这是代码:
//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 = "0x3b53aA80dD213f430007Fa81995Aadf7EE1Bd4BA" const tokenAddress = "0x965f527d9159dce6288a2219db51fc6eef120dd1"; /** * 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 = 57; //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();
完整代码可以在这里查看:https://github.com/ericet/kexuejia
Pancake IFO的代码基本一样,只需修改一下ifo的合约地址和代币的地址就能使用了
有了这个脚本,下回就不用半夜起来参与IFO了
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